public void GenerateRotationAnimation(IIGameNode gameNode, List <BabylonAnimation> animations, bool force = false)
{
if (isRotationAnimated(gameNode) || force)
{
ExportQuaternionAnimation("rotationQuaternion", animations, key =>
{
var localMatrix = gameNode.GetLocalTM(key);
if (float.IsNaN(localMatrix.Determinant))
{
RaiseError($"Determinant of {gameNode.Name} of rotation animation at {key} localMatrix is NaN ");
}
var tm_babylon = new BabylonMatrix();
tm_babylon.m = localMatrix.ToArray();
var s_babylon = new BabylonVector3();
var q_babylon = new BabylonQuaternion();
var t_babylon = new BabylonVector3();
tm_babylon.decompose(s_babylon, q_babylon, t_babylon);
// normalize
var q = q_babylon;
float q_length = (float)Math.Sqrt(q.X * q.X + q.Y * q.Y + q.Z * q.Z + q.W * q.W);
return(new[] { q_babylon.X / q_length, q_babylon.Y / q_length, q_babylon.Z / q_length, q_babylon.W / q_length });
});
}
}
private void exportTransform(BabylonAbstractMesh babylonAbstractMesh, IIGameNode maxGameNode)
{
// Position / rotation / scaling
var localTM = maxGameNode.GetLocalTM(0);
// use babylon decomposition, as 3ds max built-in values are no correct
var tm_babylon = new BabylonMatrix();
tm_babylon.m = localTM.ToArray();
var s_babylon = new BabylonVector3();
var q_babylon = new BabylonQuaternion();
var t_babylon = new BabylonVector3();
tm_babylon.decompose(s_babylon, q_babylon, t_babylon);
if (ExportQuaternionsInsteadOfEulers)
{
babylonAbstractMesh.rotationQuaternion = q_babylon.ToArray();
}
else
{
babylonAbstractMesh.rotation = q_babylon.toEulerAngles().ToArray();
}
// normalize quaternion
var q = q_babylon;
float q_length = (float)Math.Sqrt(q.X * q.X + q.Y * q.Y + q.Z * q.Z + q.W * q.W);
babylonAbstractMesh.rotationQuaternion = new[] { q_babylon.X / q_length, q_babylon.Y / q_length, q_babylon.Z / q_length, q_babylon.W / q_length };
babylonAbstractMesh.scaling = new[] { s_babylon.X, s_babylon.Y, s_babylon.Z };
babylonAbstractMesh.position = new[] { t_babylon.X, t_babylon.Y, t_babylon.Z };
}
public void GenerateScalingAnimation(IIGameNode gameNode, List <BabylonAnimation> animations)
{
if (gameNode.IGameControl.IsAnimated(IGameControlType.Scale))
{
ExportVector3Animation("scaling", animations, key =>
{
var localMatrix = gameNode.GetLocalTM(key);
if (float.IsNaN(localMatrix.Determinant))
{
RaiseError($"Determinant of {gameNode.Name} of scale animation at {key} localMatrix is NaN ");
}
var tm_babylon = new BabylonMatrix();
tm_babylon.m = localMatrix.ToArray();
var s_babylon = new BabylonVector3();
var q_babylon = new BabylonQuaternion();
var t_babylon = new BabylonVector3();
tm_babylon.decompose(s_babylon, q_babylon, t_babylon);
return(new[] { s_babylon.X, s_babylon.Y, s_babylon.Z });
});
}
}
public void GenerateRotationAnimation(IIGameNode gameNode, List <BabylonAnimation> animations, bool force = false)
{
if (gameNode.IGameControl.IsAnimated(IGameControlType.Rot) ||
gameNode.IGameControl.IsAnimated(IGameControlType.EulerX) ||
gameNode.IGameControl.IsAnimated(IGameControlType.EulerY) ||
gameNode.IGameControl.IsAnimated(IGameControlType.EulerZ) ||
(gameNode.IGameObject.IGameType == Autodesk.Max.IGameObject.ObjectTypes.Light && gameNode.IGameObject.AsGameLight().LightTarget != null) || // Light with target are indirectly animated by their target
force)
{
ExportQuaternionAnimation("rotationQuaternion", animations, key =>
{
var localMatrix = gameNode.GetLocalTM(key);
var tm_babylon = new BabylonMatrix();
tm_babylon.m = localMatrix.ToArray();
var s_babylon = new BabylonVector3();
var q_babylon = new BabylonQuaternion();
var t_babylon = new BabylonVector3();
tm_babylon.decompose(s_babylon, q_babylon, t_babylon);
// normalize
var q = q_babylon;
float q_length = (float)Math.Sqrt(q.X * q.X + q.Y * q.Y + q.Z * q.Z + q.W * q.W);
return(new[] { q_babylon.X / q_length, q_babylon.Y / q_length, q_babylon.Z / q_length, q_babylon.W / q_length });
});
}
}
private BabylonNode BoneToNode(BabylonBone babylonBone)
{
BabylonNode babylonNode = new BabylonNode();
babylonNode.id = babylonBone.id;
babylonNode.parentId = babylonBone.parentNodeId;
babylonNode.name = babylonBone.name;
babylonNode.animations = new[] { babylonBone.animation };
var tm_babylon = new BabylonMatrix();
tm_babylon.m = babylonBone.matrix.ToArray();
var s_babylon = new BabylonVector3();
var q_babylon = new BabylonQuaternion();
var t_babylon = new BabylonVector3();
tm_babylon.decompose(s_babylon, q_babylon, t_babylon);
babylonNode.position = t_babylon.ToArray();
babylonNode.rotationQuaternion = q_babylon.ToArray();
babylonNode.scaling = s_babylon.ToArray();
return(babylonNode);
}
public void GenerateRotationAnimation(IIGameNode gameNode, List <BabylonAnimation> animations, bool force = false)
{
if (gameNode.IGameControl.IsAnimated(IGameControlType.Rot) ||
gameNode.IGameControl.IsAnimated(IGameControlType.EulerX) ||
gameNode.IGameControl.IsAnimated(IGameControlType.EulerY) ||
gameNode.IGameControl.IsAnimated(IGameControlType.EulerZ) ||
force)
{
ExportQuaternionAnimation("rotationQuaternion", animations, key =>
{
var localMatrix = gameNode.GetLocalTM(key);
var tm_babylon = new BabylonMatrix();
tm_babylon.m = localMatrix.ToArray();
var s_babylon = new BabylonVector3();
var q_babylon = new BabylonQuaternion();
var t_babylon = new BabylonVector3();
tm_babylon.decompose(s_babylon, q_babylon, t_babylon);
// normalize
var q = q_babylon;
float q_length = (float)Math.Sqrt(q.X * q.X + q.Y * q.Y + q.Z * q.Z + q.W * q.W);
return(new[] { q_babylon.X / q_length, q_babylon.Y / q_length, q_babylon.Z / q_length, q_babylon.W / q_length });
});
}
}
public void GeneratePositionAnimation(IIGameNode gameNode, List <BabylonAnimation> animations)
{
if (isPositionAnimated(gameNode))
{
ExportVector3Animation("position", animations, key =>
{
var localMatrix = gameNode.GetLocalTM(key);
if (float.IsNaN(localMatrix.Determinant))
{
RaiseError($"Determinant of {gameNode.Name} of position animation at {key} localMatrix is NaN ");
}
var tm_babylon = new BabylonMatrix();
tm_babylon.m = localMatrix.ToArray();
var s_babylon = new BabylonVector3();
var q_babylon = new BabylonQuaternion();
var t_babylon = new BabylonVector3();
tm_babylon.decompose(s_babylon, q_babylon, t_babylon);
// Apply unit conversion factor to meter
t_babylon *= scaleFactorToMeters;
return(new[] { t_babylon.X, t_babylon.Y, t_babylon.Z });
});
}
}
private BabylonMatrix _getNodeLocalMatrix(GLTFNode gltfNode)
{
return(BabylonMatrix.Compose(
BabylonVector3.FromArray(gltfNode.scale),
BabylonQuaternion.FromArray(gltfNode.rotation),
BabylonVector3.FromArray(gltfNode.translation)
));
}
private GLTFNode _exportBone(BabylonBone babylonBone, GLTF gltf, BabylonSkeleton babylonSkeleton, List <BabylonBone> bones)
{
if (alreadyExportedBones.ContainsKey(babylonBone))
{
return(alreadyExportedBones[babylonBone]);
}
// Node
var gltfNode = new GLTFNode
{
name = babylonBone.name
};
gltfNode.index = gltf.NodesList.Count;
gltf.NodesList.Add(gltfNode);
alreadyExportedBones.Add(babylonBone, gltfNode);
boneToGltfNodeMap.Add(babylonBone, gltfNode);
// Hierarchy
if (babylonBone.parentBoneIndex >= 0)
{
var babylonParentBone = bones.Find(_babylonBone => _babylonBone.index == babylonBone.parentBoneIndex);
var gltfParentNode = _exportBone(babylonParentBone, gltf, babylonSkeleton, bones);
RaiseMessage("GLTFExporter.Skin | Add " + babylonBone.name + " as child to " + gltfParentNode.name, 3);
gltfParentNode.ChildrenList.Add(gltfNode.index);
gltfNode.parent = gltfParentNode;
}
else
{
// It's a root node
// Only root nodes are listed in a gltf scene
RaiseMessage("GLTFExporter.Skin | Add " + babylonBone.name + " as root node to scene", 3);
gltf.scenes[0].NodesList.Add(gltfNode.index);
}
// Transform
// Bones transform are exported through translation/rotation/scale (TRS) rather than matrix
// Because gltf node animation can only target TRS properties, not the matrix one
// Create matrix from array
var babylonMatrix = new BabylonMatrix();
babylonMatrix.m = babylonBone.matrix;
// Decompose matrix into TRS
var translationBabylon = new BabylonVector3();
var rotationQuatBabylon = new BabylonQuaternion();
var scaleBabylon = new BabylonVector3();
babylonMatrix.decompose(scaleBabylon, rotationQuatBabylon, translationBabylon);
// Store TRS values
gltfNode.translation = translationBabylon.ToArray();
gltfNode.rotation = rotationQuatBabylon.ToArray();
gltfNode.scale = scaleBabylon.ToArray();
// Animations
//ExportBoneAnimation(babylonBone, gltf, gltfNode);
return(gltfNode);
}
private GLTFNode ExportAbstractMesh(BabylonAbstractMesh babylonAbstractMesh, GLTF gltf, GLTFNode gltfParentNode)
{
RaiseMessage("GLTFExporter.AbstractMesh | Export abstract mesh named: " + babylonAbstractMesh.name, 1);
// Node
var gltfNode = new GLTFNode();
gltfNode.name = babylonAbstractMesh.name;
gltfNode.index = gltf.NodesList.Count;
gltf.NodesList.Add(gltfNode);
// Hierarchy
if (gltfParentNode != null)
{
RaiseMessage("GLTFExporter.AbstractMesh | Add " + babylonAbstractMesh.name + " as child to " + gltfParentNode.name, 2);
gltfParentNode.ChildrenList.Add(gltfNode.index);
}
else
{
// It's a root node
// Only root nodes are listed in a gltf scene
RaiseMessage("GLTFExporter.AbstractMesh | Add " + babylonAbstractMesh.name + " as root node to scene", 2);
gltf.scenes[0].NodesList.Add(gltfNode.index);
}
// Transform
gltfNode.translation = babylonAbstractMesh.position;
// TODO - Choose between this method and the extra root node
// Switch from left to right handed coordinate system
//gltfNode.translation[0] *= -1;
if (babylonAbstractMesh.rotationQuaternion != null)
{
gltfNode.rotation = babylonAbstractMesh.rotationQuaternion;
}
else
{
// Convert rotation vector to quaternion
BabylonVector3 rotationVector3 = new BabylonVector3
{
X = babylonAbstractMesh.rotation[0],
Y = babylonAbstractMesh.rotation[1],
Z = babylonAbstractMesh.rotation[2]
};
gltfNode.rotation = rotationVector3.toQuaternion().ToArray();
}
gltfNode.scale = babylonAbstractMesh.scaling;
// Mesh
var gltfMesh = gltf.MeshesList.Find(_gltfMesh => _gltfMesh.idGroupInstance == babylonAbstractMesh.idGroupInstance);
if (gltfMesh != null)
{
gltfNode.mesh = gltfMesh.index;
}
return(gltfNode);
}
private BabylonMatrix _removeScale(BabylonMatrix boneWorldMatrix)
{
var translation = new BabylonVector3();
var rotation = new BabylonQuaternion();
var scale = new BabylonVector3();
boneWorldMatrix.decompose(scale, rotation, translation);
scale.X = 1;
scale.Y = 1;
scale.Z = 1;
return(BabylonMatrix.Compose(scale, rotation, translation));
}
/**
* Computes a texture transform matrix with a pre-transformation
*/
public static BabylonMatrix ComputeTextureTransformMatrix(BabylonVector3 pivotCenter, BabylonVector3 offset, BabylonQuaternion rotation, BabylonVector3 scale)
{
var dOffset = new BabylonVector3();
var dRotation = new BabylonQuaternion();
var dScale = new BabylonVector3();
offset.X *= scale.X;
offset.Y *= scale.Y;
offset.Z *= 0;
var transformMatrix = BabylonMatrix.Translation(new BabylonVector3(-pivotCenter.X, -pivotCenter.Y, 0)).multiply(BabylonMatrix.Compose(scale, rotation, offset)).multiply(BabylonMatrix.Translation(pivotCenter));
return(transformMatrix);
}
private void printMatrix(string name, BabylonMatrix matrix)
{
// Decompose matrix into TRS
var translation = new BabylonVector3();
var rotationQuat = new BabylonQuaternion();
var scale = new BabylonVector3();
matrix.decompose(scale, rotationQuat, translation);
var rotation = rotationQuat.toEulerAngles();
rotation *= (float)(180 / Math.PI);
var lvl = 3;
RaiseWarning(name + ".translation=[" + translation.X + ", " + translation.Y + ", " + translation.Z + "]", lvl);
RaiseWarning(name + ".rotation=[" + rotation.X + ", " + rotation.Y + ", " + rotation.Z + "]", lvl);
RaiseWarning(name + ".scale=[" + scale.X + ", " + scale.Y + ", " + scale.Z + "]", lvl);
}
public void GenerateScalingAnimation(IIGameNode gameNode, List <BabylonAnimation> animations)
{
if (gameNode.IGameControl.IsAnimated(IGameControlType.Scale))
{
ExportVector3Animation("scaling", animations, key =>
{
var localMatrix = gameNode.GetLocalTM(key);
var tm_babylon = new BabylonMatrix();
tm_babylon.m = localMatrix.ToArray();
var s_babylon = new BabylonVector3();
var q_babylon = new BabylonQuaternion();
var t_babylon = new BabylonVector3();
tm_babylon.decompose(s_babylon, q_babylon, t_babylon);
return(new[] { s_babylon.X, s_babylon.Y, s_babylon.Z });
});
}
}
private GLTFMesh ExportMesh(BabylonMesh babylonMesh, GLTF gltf, BabylonScene babylonScene)
{
RaiseMessage("GLTFExporter.Mesh | Export mesh named: " + babylonMesh.name, 1);
// --------------------------
// --- Mesh from babylon ----
// --------------------------
if (babylonMesh.positions == null || babylonMesh.positions.Length == 0)
{
RaiseMessage("GLTFExporter.Mesh | Mesh is a dummy", 2);
return(null);
}
RaiseMessage("GLTFExporter.Mesh | Mesh from babylon", 2);
// Retreive general data from babylon mesh
int nbVertices = babylonMesh.positions.Length / 3;
bool hasTangents = babylonMesh.tangents != null && babylonMesh.tangents.Length > 0;
bool hasUV = babylonMesh.uvs != null && babylonMesh.uvs.Length > 0;
bool hasUV2 = babylonMesh.uvs2 != null && babylonMesh.uvs2.Length > 0;
bool hasColor = babylonMesh.colors != null && babylonMesh.colors.Length > 0;
bool hasBones = babylonMesh.matricesIndices != null && babylonMesh.matricesIndices.Length > 0;
bool hasBonesExtra = babylonMesh.matricesIndicesExtra != null && babylonMesh.matricesIndicesExtra.Length > 0;
RaiseMessage("GLTFExporter.Mesh | nbVertices=" + nbVertices, 3);
RaiseMessage("GLTFExporter.Mesh | hasUV=" + hasUV, 3);
RaiseMessage("GLTFExporter.Mesh | hasUV2=" + hasUV2, 3);
RaiseMessage("GLTFExporter.Mesh | hasColor=" + hasColor, 3);
RaiseMessage("GLTFExporter.Mesh | hasBones=" + hasBones, 3);
RaiseMessage("GLTFExporter.Mesh | hasBonesExtra=" + hasBonesExtra, 3);
// Retreive vertices data from babylon mesh
List <GLTFGlobalVertex> globalVertices = new List <GLTFGlobalVertex>();
for (int indexVertex = 0; indexVertex < nbVertices; indexVertex++)
{
GLTFGlobalVertex globalVertex = new GLTFGlobalVertex();
globalVertex.Position = BabylonVector3.FromArray(babylonMesh.positions, indexVertex);
globalVertex.Normal = BabylonVector3.FromArray(babylonMesh.normals, indexVertex);
if (hasTangents)
{
globalVertex.Tangent = BabylonQuaternion.FromArray(babylonMesh.tangents, indexVertex);
// Switch coordinate system at object level
globalVertex.Tangent.Z *= -1;
// Invert W to switch to right handed system
globalVertex.Tangent.W *= -1;
}
// Switch coordinate system at object level
globalVertex.Position.Z *= -1;
globalVertex.Normal.Z *= -1;
if (hasUV)
{
globalVertex.UV = BabylonVector2.FromArray(babylonMesh.uvs, indexVertex);
// For glTF, the origin of the UV coordinates (0, 0) corresponds to the upper left corner of a texture image
// While for Babylon, it corresponds to the lower left corner of a texture image
globalVertex.UV.Y = 1 - globalVertex.UV.Y;
}
if (hasUV2)
{
globalVertex.UV2 = BabylonVector2.FromArray(babylonMesh.uvs2, indexVertex);
// For glTF, the origin of the UV coordinates (0, 0) corresponds to the upper left corner of a texture image
// While for Babylon, it corresponds to the lower left corner of a texture image
globalVertex.UV2.Y = 1 - globalVertex.UV2.Y;
}
if (hasColor)
{
globalVertex.Color = Tools.SubArrayFromEntity(babylonMesh.colors, indexVertex, 4);
}
if (hasBones)
{
// In babylon, the 4 bones indices are stored in a single int
// Each bone index is 8-bit offset from the next
int bonesIndicesMerged = babylonMesh.matricesIndices[indexVertex];
int bone3 = bonesIndicesMerged >> 24;
bonesIndicesMerged -= bone3 << 24;
int bone2 = bonesIndicesMerged >> 16;
bonesIndicesMerged -= bone2 << 16;
int bone1 = bonesIndicesMerged >> 8;
bonesIndicesMerged -= bone1 << 8;
int bone0 = bonesIndicesMerged >> 0;
bonesIndicesMerged -= bone0 << 0;
var bonesIndicesArray = new ushort[] { (ushort)bone0, (ushort)bone1, (ushort)bone2, (ushort)bone3 };
globalVertex.BonesIndices = bonesIndicesArray;
globalVertex.BonesWeights = Tools.SubArrayFromEntity(babylonMesh.matricesWeights, indexVertex, 4);
}
globalVertices.Add(globalVertex);
}
var babylonMorphTargetManager = GetBabylonMorphTargetManager(babylonScene, babylonMesh);
// Retrieve indices from babylon mesh
List <int> babylonIndices = babylonMesh.indices.ToList();
// --------------------------
// ------- Init glTF --------
// --------------------------
RaiseMessage("GLTFExporter.Mesh | Init glTF", 2);
// Mesh
var gltfMesh = new GLTFMesh {
name = babylonMesh.name
};
gltfMesh.index = gltf.MeshesList.Count;
gltf.MeshesList.Add(gltfMesh);
gltfMesh.idGroupInstance = babylonMesh.idGroupInstance;
if (hasBones)
{
gltfMesh.idBabylonSkeleton = babylonMesh.skeletonId;
}
// --------------------------
// ---- glTF primitives -----
// --------------------------
RaiseMessage("GLTFExporter.Mesh | glTF primitives", 2);
var meshPrimitives = new List <GLTFMeshPrimitive>();
foreach (BabylonSubMesh babylonSubMesh in babylonMesh.subMeshes)
{
// --------------------------
// ------ SubMesh data ------
// --------------------------
List <GLTFGlobalVertex> globalVerticesSubMesh = globalVertices.GetRange(babylonSubMesh.verticesStart, babylonSubMesh.verticesCount);
var gltfIndices = babylonIndices.GetRange(babylonSubMesh.indexStart, babylonSubMesh.indexCount);
// In gltf, indices of each mesh primitive are 0-based (ie: min value is 0)
// Thus, the gltf indices list is a concatenation of sub lists all 0-based
// Example for 2 triangles, each being a submesh:
// babylonIndices = {0,1,2, 3,4,5} gives as result gltfIndicies = {0,1,2, 0,1,2}
var minIndiceValue = gltfIndices.Min(); // Should be equal to babylonSubMesh.indexStart
for (int indexIndice = 0; indexIndice < gltfIndices.Count; indexIndice++)
{
gltfIndices[indexIndice] -= minIndiceValue;
}
// --------------------------
// ----- Mesh primitive -----
// --------------------------
// MeshPrimitive
var meshPrimitive = new GLTFMeshPrimitive
{
attributes = new Dictionary <string, int>()
};
meshPrimitives.Add(meshPrimitive);
// Material
if (babylonMesh.materialId != null)
{
RaiseMessage("GLTFExporter.Mesh | Material", 3);
// Retreive the babylon material
BabylonMaterial babylonMaterial;
var babylonMaterialId = babylonMesh.materialId;
// From multi materials first, if any
// Loop recursively even though it shouldn't be a real use case
var babylonMultiMaterials = new List <BabylonMultiMaterial>(babylonScene.multiMaterials);
BabylonMultiMaterial babylonMultiMaterial;
do
{
babylonMultiMaterial = babylonMultiMaterials.Find(_babylonMultiMaterial => _babylonMultiMaterial.id == babylonMaterialId);
if (babylonMultiMaterial != null)
{
babylonMaterialId = babylonMultiMaterial.materials[babylonSubMesh.materialIndex];
}
}while (babylonMultiMaterial != null);
// Then from materials
var babylonMaterials = new List <BabylonMaterial>(babylonScene.materials);
babylonMaterial = babylonMaterials.Find(_babylonMaterial => _babylonMaterial.id == babylonMaterialId);
// If babylon material was exported successfully
if (babylonMaterial != null)
{
// Update primitive material index
var indexMaterial = babylonMaterialsToExport.FindIndex(_babylonMaterial => _babylonMaterial == babylonMaterial);
if (indexMaterial == -1)
{
// Store material for export
indexMaterial = babylonMaterialsToExport.Count;
babylonMaterialsToExport.Add(babylonMaterial);
}
meshPrimitive.material = indexMaterial;
}
// TODO - Add and retreive info from babylon material
meshPrimitive.mode = GLTFMeshPrimitive.FillMode.TRIANGLES;
}
// --------------------------
// ------- Accessors --------
// --------------------------
RaiseMessage("GLTFExporter.Mesh | Geometry", 3);
// Buffer
var buffer = GLTFBufferService.Instance.GetBuffer(gltf);
// --- Indices ---
var componentType = GLTFAccessor.ComponentType.UNSIGNED_SHORT;
if (nbVertices >= 65536)
{
componentType = GLTFAccessor.ComponentType.UNSIGNED_INT;
}
var accessorIndices = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewScalar(gltf, buffer),
"accessorIndices",
componentType,
GLTFAccessor.TypeEnum.SCALAR
);
meshPrimitive.indices = accessorIndices.index;
// Populate accessor
if (componentType == GLTFAccessor.ComponentType.UNSIGNED_INT)
{
gltfIndices.ForEach(n => accessorIndices.bytesList.AddRange(BitConverter.GetBytes(n)));
}
else
{
var gltfIndicesShort = gltfIndices.ConvertAll(new Converter <int, ushort>(n => (ushort)n));
gltfIndicesShort.ForEach(n => accessorIndices.bytesList.AddRange(BitConverter.GetBytes(n)));
}
accessorIndices.count = gltfIndices.Count;
// --- Positions ---
var accessorPositions = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec3(gltf, buffer),
"accessorPositions",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC3
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.POSITION.ToString(), accessorPositions.index);
// Populate accessor
accessorPositions.min = new float[] { float.MaxValue, float.MaxValue, float.MaxValue };
accessorPositions.max = new float[] { float.MinValue, float.MinValue, float.MinValue };
globalVerticesSubMesh.ForEach((globalVertex) =>
{
var positions = globalVertex.Position.ToArray();
// Store values as bytes
foreach (var position in positions)
{
accessorPositions.bytesList.AddRange(BitConverter.GetBytes(position));
}
// Update min and max values
GLTFBufferService.UpdateMinMaxAccessor(accessorPositions, positions);
});
accessorPositions.count = globalVerticesSubMesh.Count;
// --- Normals ---
var accessorNormals = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec3(gltf, buffer),
"accessorNormals",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC3
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.NORMAL.ToString(), accessorNormals.index);
// Populate accessor
List <float> normals = globalVerticesSubMesh.SelectMany(v => v.Normal.ToArray()).ToList();
normals.ForEach(n => accessorNormals.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorNormals.count = globalVerticesSubMesh.Count;
// --- Tangents ---
if (hasTangents)
{
var accessorTangents = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec4(gltf, buffer),
"accessorTangents",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC4
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.TANGENT.ToString(), accessorTangents.index);
// Populate accessor
List <float> tangents = globalVerticesSubMesh.SelectMany(v => v.Tangent.ToArray()).ToList();
tangents.ForEach(n => accessorTangents.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorTangents.count = globalVerticesSubMesh.Count;
}
// --- Colors ---
if (hasColor)
{
var accessorColors = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec4(gltf, buffer),
"accessorColors",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC4
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.COLOR_0.ToString(), accessorColors.index);
// Populate accessor
List <float> colors = globalVerticesSubMesh.SelectMany(v => new[] { v.Color[0], v.Color[1], v.Color[2], v.Color[3] }).ToList();
colors.ForEach(n => accessorColors.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorColors.count = globalVerticesSubMesh.Count;
}
// --- UV ---
if (hasUV)
{
var accessorUVs = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec2(gltf, buffer),
"accessorUVs",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC2
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.TEXCOORD_0.ToString(), accessorUVs.index);
// Populate accessor
List <float> uvs = globalVerticesSubMesh.SelectMany(v => v.UV.ToArray()).ToList();
uvs.ForEach(n => accessorUVs.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorUVs.count = globalVerticesSubMesh.Count;
}
// --- UV2 ---
if (hasUV2)
{
var accessorUV2s = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec2(gltf, buffer),
"accessorUV2s",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC2
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.TEXCOORD_1.ToString(), accessorUV2s.index);
// Populate accessor
List <float> uvs2 = globalVerticesSubMesh.SelectMany(v => v.UV2.ToArray()).ToList();
uvs2.ForEach(n => accessorUV2s.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorUV2s.count = globalVerticesSubMesh.Count;
}
// --- Bones ---
if (hasBones)
{
RaiseMessage("GLTFExporter.Mesh | Bones", 3);
// --- Joints ---
var accessorJoints = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewUnsignedShortVec4(gltf, buffer),
"accessorJoints",
GLTFAccessor.ComponentType.UNSIGNED_SHORT,
GLTFAccessor.TypeEnum.VEC4
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.JOINTS_0.ToString(), accessorJoints.index);
// Populate accessor
List <ushort> joints = globalVerticesSubMesh.SelectMany(v => new[] { v.BonesIndices[0], v.BonesIndices[1], v.BonesIndices[2], v.BonesIndices[3] }).ToList();
joints.ForEach(n => accessorJoints.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorJoints.count = globalVerticesSubMesh.Count;
// --- Weights ---
var accessorWeights = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec4(gltf, buffer),
"accessorWeights",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC4
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.WEIGHTS_0.ToString(), accessorWeights.index);
// Populate accessor
List <float> weightBones = globalVerticesSubMesh.SelectMany(v => new[] { v.BonesWeights[0], v.BonesWeights[1], v.BonesWeights[2], v.BonesWeights[3] }).ToList();
weightBones.ForEach(n => accessorWeights.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorWeights.count = globalVerticesSubMesh.Count;
}
if (hasBonesExtra)
{
RaiseWarning("Too many bones influences per vertex. glTF only support up to 4 bones influences per vertex. The result may not be as expected.", 3);
}
// Morph targets positions and normals
if (babylonMorphTargetManager != null)
{
RaiseMessage("GLTFExporter.Mesh | Morph targets", 3);
_exportMorphTargets(babylonMesh, babylonSubMesh, babylonMorphTargetManager, gltf, buffer, meshPrimitive);
}
}
gltfMesh.primitives = meshPrimitives.ToArray();
// Morph targets weights
if (babylonMorphTargetManager != null)
{
var weights = new List <float>();
foreach (BabylonMorphTarget babylonMorphTarget in babylonMorphTargetManager.targets)
{
weights.Add(babylonMorphTarget.influence);
}
gltfMesh.weights = weights.ToArray();
}
return(gltfMesh);
}
private BabylonNode ExportLight(IIGameScene scene, IIGameNode lightNode, BabylonScene babylonScene)
{
if (IsLightExportable(lightNode) == false)
{
return(null);
}
var gameLight = lightNode.IGameObject.AsGameLight();
var initialized = gameLight.InitializeData;
var babylonLight = new BabylonLight();
RaiseMessage(lightNode.Name, 1);
babylonLight.name = lightNode.Name;
// Export the custom attributes of this light
babylonLight.metadata = ExportExtraAttributes(lightNode, babylonScene);
// To preserve the position/rotation and the hierarchy, we create a dummy that will contains as direct children the light and the light children
// The light will have no children. The dummy will contains the position and rotation animations.
bool createDummy = lightNode.ChildCount > 0;
BabylonNode dummy = null;
if (createDummy)
{
dummy = ExportDummy(scene, lightNode, babylonScene);
dummy.name = "_" + dummy.name + "_";
babylonLight.id = Guid.NewGuid().ToString();
babylonLight.parentId = dummy.id;
babylonLight.hasDummy = true;
}
else
{
babylonLight.id = lightNode.MaxNode.GetGuid().ToString();
if (lightNode.NodeParent != null)
{
babylonLight.parentId = lightNode.NodeParent.MaxNode.GetGuid().ToString();
}
}
// Type
var maxLight = (lightNode.MaxNode.ObjectRef as ILightObject);
var lightState = Loader.Global.LightState.Create();
maxLight.EvalLightState(0, Tools.Forever, lightState);
switch (lightState.Type)
{
case LightType.OmniLgt:
babylonLight.type = 0;
break;
case LightType.SpotLgt:
babylonLight.type = 2;
babylonLight.angle = (float)(maxLight.GetFallsize(0, Tools.Forever) * Math.PI / 180.0f);
babylonLight.exponent = 1;
break;
case LightType.DirectLgt:
babylonLight.type = 1;
break;
case LightType.AmbientLgt:
babylonLight.type = 3;
babylonLight.groundColor = new float[] { 0, 0, 0 };
break;
}
// Shadows
if (maxLight.ShadowMethod == 1)
{
if (lightState.Type == LightType.DirectLgt || lightState.Type == LightType.SpotLgt || lightState.Type == LightType.OmniLgt)
{
ExportShadowGenerator(lightNode.MaxNode, babylonScene, babylonLight);
}
else
{
RaiseWarning("Shadows maps are only supported for point, directional and spot lights", 2);
}
}
// Position / rotation / scaling
if (createDummy)
{
// The position is stored by the dummy parent and the default direction is downward and it is updated by the rotation of the parent dummy
babylonLight.position = new[] { 0f, 0f, 0f };
babylonLight.direction = new[] { 0f, -1f, 0f };
}
else
{
exportTransform(babylonLight, lightNode);
// Position
var localMatrix = lightNode.GetLocalTM(0);
var position = localMatrix.Translation;
// Direction
var target = gameLight.LightTarget;
if (target != null)
{
var targetWm = target.GetObjectTM(0);
var targetPosition = targetWm.Translation;
var direction = targetPosition.Subtract(position).Normalize;
babylonLight.direction = new[] { direction.X, direction.Y, direction.Z };
}
else
{
var vDir = Loader.Global.Point3.Create(0, -1, 0);
vDir = localMatrix.ExtractMatrix3().VectorTransform(vDir).Normalize;
babylonLight.direction = new[] { vDir.X, vDir.Y, vDir.Z };
}
}
// The HemisphericLight simulates the ambient environment light, so the passed direction is the light reflection direction, not the incoming direction.
// So we need the opposite direction
if (babylonLight.type == 3)
{
var worldRotation = lightNode.GetWorldTM(0).Rotation;
BabylonQuaternion quaternion = new BabylonQuaternion(worldRotation.X, worldRotation.Y, worldRotation.Z, worldRotation.W);
babylonLight.direction = quaternion.Rotate(new BabylonVector3(0f, 1f, 0f)).ToArray();
}
var maxScene = Loader.Core.RootNode;
// Exclusion
try
{
var inclusion = maxLight.ExclList.TestFlag(1); //NT_INCLUDE
var checkExclusionList = maxLight.ExclList.TestFlag(2); //NT_AFFECT_ILLUM
if (checkExclusionList)
{
var excllist = new List <string>();
var incllist = new List <string>();
foreach (var meshNode in maxScene.NodesListBySuperClass(SClass_ID.Geomobject))
{
#if MAX2017 || MAX2018 || MAX2019 || MAX2020
if (meshNode.CastShadows)
#else
if (meshNode.CastShadows == 1)
#endif
{
var inList = maxLight.ExclList.FindNode(meshNode) != -1;
if (inList)
{
if (inclusion)
{
incllist.Add(meshNode.GetGuid().ToString());
}
else
{
excllist.Add(meshNode.GetGuid().ToString());
}
}
}
}
babylonLight.includedOnlyMeshesIds = incllist.ToArray();
babylonLight.excludedMeshesIds = excllist.ToArray();
}
}
catch (Exception e)
{
RaiseMessage("Light exclusion not supported", 2);
}
// Other fields
babylonLight.intensity = maxLight.GetIntensity(0, Tools.Forever);
babylonLight.diffuse = lightState.AffectDiffuse ? maxLight.GetRGBColor(0, Tools.Forever).ToArray() : new float[] { 0, 0, 0 };
babylonLight.specular = lightState.AffectDiffuse ? maxLight.GetRGBColor(0, Tools.Forever).ToArray() : new float[] { 0, 0, 0 };
if (maxLight.UseAtten)
{
babylonLight.range = maxLight.GetAtten(0, 3, Tools.Forever);
}
if (exportParameters.exportAnimations)
{
// Animations
var animations = new List <BabylonAnimation>();
if (createDummy)
{
// Position and rotation animations are stored by the parent (the dummy). The direction result from the parent rotation except for the HemisphericLight.
if (babylonLight.type == 3)
{
BabylonVector3 direction = new BabylonVector3(0, 1, 0);
ExportVector3Animation("direction", animations, key =>
{
var worldRotation = lightNode.GetWorldTM(key).Rotation;
BabylonQuaternion quaternion = new BabylonQuaternion(worldRotation.X, worldRotation.Y, worldRotation.Z, worldRotation.W);
return(quaternion.Rotate(direction).ToArray());
});
}
}
else
{
GeneratePositionAnimation(lightNode, animations);
ExportVector3Animation("direction", animations, key =>
{
var localMatrixAnimDir = lightNode.GetLocalTM(key);
var positionLight = localMatrixAnimDir.Translation;
var lightTarget = gameLight.LightTarget;
if (lightTarget != null)
{
var targetWm = lightTarget.GetObjectTM(key);
var targetPosition = targetWm.Translation;
var direction = targetPosition.Subtract(positionLight).Normalize;
return(new[] { direction.X, direction.Y, direction.Z });
}
else
{
var vDir = Loader.Global.Point3.Create(0, -1, 0);
vDir = localMatrixAnimDir.ExtractMatrix3().VectorTransform(vDir).Normalize;
// The HemisphericLight (type == 3) simulates the ambient environment light, so the passed direction is the light reflection direction, not the incoming direction.
// So we need the opposite direction
return(babylonLight.type != 3 ? new[] { vDir.X, vDir.Y, vDir.Z } : new[] { -vDir.X, -vDir.Y, -vDir.Z });
}
});
// Animation temporary stored for gltf but not exported for babylon
// TODO - Will cause an issue when externalizing the glTF export process
var extraAnimations = new List <BabylonAnimation>();
// Do not check if node rotation properties are animated
GenerateRotationAnimation(lightNode, extraAnimations, true);
babylonLight.extraAnimations = extraAnimations;
}
ExportFloatAnimation("intensity", animations, key => new[] { maxLight.GetIntensity(key, Tools.Forever) });
ExportColor3Animation("diffuse", animations, key =>
{
return(lightState.AffectDiffuse? maxLight.GetRGBColor(key, Tools.Forever).ToArray() : new float[] { 0, 0, 0 });
});
babylonLight.animations = animations.ToArray();
if (lightNode.MaxNode.GetBoolProperty("babylonjs_autoanimate"))
{
babylonLight.autoAnimate = true;
babylonLight.autoAnimateFrom = (int)lightNode.MaxNode.GetFloatProperty("babylonjs_autoanimate_from");
babylonLight.autoAnimateTo = (int)lightNode.MaxNode.GetFloatProperty("babylonjs_autoanimate_to");
babylonLight.autoAnimateLoop = lightNode.MaxNode.GetBoolProperty("babylonjs_autoanimateloop");
}
}
babylonScene.LightsList.Add(babylonLight);
return(createDummy ? dummy : babylonLight);
}
private IStdUVGen _exportUV(IStdUVGen uvGen, BabylonTexture babylonTexture)
{
switch (uvGen.GetCoordMapping(0))
{
case 1: //MAP_SPHERICAL
babylonTexture.coordinatesMode = BabylonTexture.CoordinatesMode.SPHERICAL_MODE;
break;
case 2: //MAP_PLANAR
babylonTexture.coordinatesMode = BabylonTexture.CoordinatesMode.PLANAR_MODE;
break;
default:
babylonTexture.coordinatesMode = BabylonTexture.CoordinatesMode.EXPLICIT_MODE;
break;
}
babylonTexture.coordinatesIndex = uvGen.MapChannel - 1;
if (uvGen.MapChannel > 2)
{
RaiseWarning(string.Format("Unsupported map channel, Only channel 1 and 2 are supported."), 3);
}
babylonTexture.uOffset = uvGen.GetUOffs(0);
babylonTexture.vOffset = -uvGen.GetVOffs(0);
babylonTexture.uScale = uvGen.GetUScl(0);
babylonTexture.vScale = uvGen.GetVScl(0);
var offset = new BabylonVector3(babylonTexture.uOffset, -babylonTexture.vOffset, 0);
var scale = new BabylonVector3(babylonTexture.uScale, babylonTexture.vScale, 1);
var rotationEuler = new BabylonVector3(uvGen.GetUAng(0), uvGen.GetVAng(0), uvGen.GetWAng(0));
var rotation = BabylonQuaternion.FromEulerAngles(rotationEuler.X, rotationEuler.Y, rotationEuler.Z);
var pivotCenter = new BabylonVector3(-0.5f, -0.5f, 0);
var transformMatrix = MathUtilities.ComputeTextureTransformMatrix(pivotCenter, offset, rotation, scale);
transformMatrix.decompose(scale, rotation, offset);
var texTransformRotationEuler = rotation.toEulerAngles();
babylonTexture.uOffset = -offset.X;
babylonTexture.vOffset = -offset.Y;
babylonTexture.uScale = scale.X;
babylonTexture.vScale = -scale.Y;
babylonTexture.uRotationCenter = 0.0f;
babylonTexture.vRotationCenter = 0.0f;
babylonTexture.invertY = false;
babylonTexture.uAng = texTransformRotationEuler.X;
babylonTexture.vAng = texTransformRotationEuler.Y;
babylonTexture.wAng = texTransformRotationEuler.Z;
if (Path.GetExtension(babylonTexture.name).ToLower() == ".dds")
{
babylonTexture.vScale *= -1; // Need to invert Y-axis for DDS texture
}
if (babylonTexture.wAng != 0f &&
(babylonTexture.uScale != 1f || babylonTexture.vScale != 1f) &&
(Math.Abs(babylonTexture.uScale) - Math.Abs(babylonTexture.vScale)) > float.Epsilon)
{
RaiseWarning("Rotation and non-uniform tiling (scale) on a texture is not supported as it will cause texture shearing. You can use the map UV of the mesh for those transformations.", 3);
}
babylonTexture.wrapU = BabylonTexture.AddressMode.CLAMP_ADDRESSMODE; // CLAMP
if ((uvGen.TextureTiling & 1) != 0) // WRAP
{
babylonTexture.wrapU = BabylonTexture.AddressMode.WRAP_ADDRESSMODE;
}
else if ((uvGen.TextureTiling & 4) != 0) // MIRROR
{
babylonTexture.wrapU = BabylonTexture.AddressMode.MIRROR_ADDRESSMODE;
}
babylonTexture.wrapV = BabylonTexture.AddressMode.CLAMP_ADDRESSMODE; // CLAMP
if ((uvGen.TextureTiling & 2) != 0) // WRAP
{
babylonTexture.wrapV = BabylonTexture.AddressMode.WRAP_ADDRESSMODE;
}
else if ((uvGen.TextureTiling & 8) != 0) // MIRROR
{
babylonTexture.wrapV = BabylonTexture.AddressMode.MIRROR_ADDRESSMODE;
}
return(uvGen);
}
private void ExportBoneAnimation(GLTFAnimation gltfAnimation, int startFrame, int endFrame, GLTF gltf, BabylonBone babylonBone, GLTFNode gltfNode)
{
var channelList = gltfAnimation.ChannelList;
var samplerList = gltfAnimation.SamplerList;
if (babylonBone.animation != null && babylonBone.animation.property == "_matrix")
{
RaiseMessage("GLTFExporter.Animation | Export animation of bone named: " + babylonBone.name, 2);
var babylonAnimation = babylonBone.animation;
// Optimize animation
var optimizeAnimations = !Loader.Core.RootNode.GetBoolProperty("babylonjs_donotoptimizeanimations"); // reverse negation for clarity
if (optimizeAnimations)
{
// Filter animation keys to only keep frames between start and end
List <BabylonAnimationKey> keysInRangeFull = babylonAnimation.keysFull.FindAll(babylonAnimationKey => babylonAnimationKey.frame >= startFrame && babylonAnimationKey.frame <= endFrame);
// Optimization process always keeps first and last frames
OptimizeAnimations(keysInRangeFull, false);
if (IsAnimationKeysRelevant(keysInRangeFull))
{
// From now, use optimized animation instead
// Override animation keys
babylonAnimation.keys = keysInRangeFull.ToArray();
}
}
// --- Input ---
var accessorInput = _createAndPopulateInput(gltf, babylonAnimation, startFrame, endFrame);
if (accessorInput == null)
{
return;
}
// --- Output ---
var paths = new string[] { "translation", "rotation", "scale" };
var accessorOutputByPath = new Dictionary <string, GLTFAccessor>();
foreach (string path in paths)
{
GLTFAccessor accessorOutput = _createAccessorOfPath(path, gltf);
accessorOutputByPath.Add(path, accessorOutput);
}
// Populate accessors
QuatCorrection quatCorr = new QuatCorrection(); // restart correction for each curve
foreach (var babylonAnimationKey in babylonAnimation.keys)
{
if (babylonAnimationKey.frame < startFrame)
{
continue;
}
if (babylonAnimationKey.frame > endFrame)
{
continue;
}
var matrix = new BabylonMatrix();
matrix.m = babylonAnimationKey.values;
var translationBabylon = new BabylonVector3();
var rotationQuatBabylon = new BabylonQuaternion();
var scaleBabylon = new BabylonVector3();
matrix.decompose(scaleBabylon, rotationQuatBabylon, translationBabylon);
translationBabylon.Z *= -1;
if (exportParameters.kuesaContQuats)
{
quatCorr.Quat = rotationQuatBabylon;
rotationQuatBabylon = quatCorr.Quat;
}
rotationQuatBabylon.X *= -1;
rotationQuatBabylon.Y *= -1;
var outputValuesByPath = new Dictionary <string, float[]>();
outputValuesByPath.Add("translation", translationBabylon.ToArray());
outputValuesByPath.Add("rotation", rotationQuatBabylon.ToArray());
outputValuesByPath.Add("scale", scaleBabylon.ToArray());
// Store values as bytes
foreach (string path in paths)
{
var accessorOutput = accessorOutputByPath[path];
var outputValues = outputValuesByPath[path];
foreach (var outputValue in outputValues)
{
accessorOutput.bytesList.AddRange(BitConverter.GetBytes(outputValue));
}
accessorOutput.count++;
}
}
;
foreach (string path in paths)
{
var accessorOutput = accessorOutputByPath[path];
// Animation sampler
var gltfAnimationSampler = new GLTFAnimationSampler
{
input = accessorInput.index,
output = accessorOutput.index
};
gltfAnimationSampler.index = samplerList.Count;
samplerList.Add(gltfAnimationSampler);
// Target
var gltfTarget = new GLTFChannelTarget
{
node = gltfNode.index
};
gltfTarget.path = path;
// Channel
var gltfChannel = new GLTFChannel
{
sampler = gltfAnimationSampler.index,
target = gltfTarget
};
channelList.Add(gltfChannel);
}
}
}
int CreateGlobalVertex(IIGameNode meshNode, IIGameMesh mesh, BabylonAbstractMesh babylonAbstractMesh, IMatrix3 invertedWorldMatrix, IFaceEx face, int facePart, List <GlobalVertex> vertices, bool hasUV, bool hasUV2, bool hasColor, bool hasAlpha, List <GlobalVertex>[] verticesAlreadyExported, IIGameSkin skin, List <int> boneIds)
{
var vertexIndex = (int)face.Vert[facePart];
// Position can by retreived in world space or object space
// Unfortunately, this value can't be retreived in local space
var vertex = new GlobalVertex
{
BaseIndex = vertexIndex,
Position = mesh.GetVertex(vertexIndex, false), // world space
Normal = mesh.GetNormal((int)face.Norm[facePart], false) // world space
};
if (exportParameters.exportTangents)
{
int indexTangentBinormal = mesh.GetFaceVertexTangentBinormal(face.MeshFaceIndex, facePart, 1);
IPoint3 normal = vertex.Normal.Normalize;
IPoint3 tangent = mesh.GetTangent(indexTangentBinormal, 1).Normalize;
IPoint3 bitangent = mesh.GetBinormal(indexTangentBinormal, 1).Normalize;
int w = GetW(normal, tangent, bitangent);
vertex.Tangent = new float[] { tangent.X, tangent.Y, tangent.Z, w };
}
// Convert position and normal to local space
vertex.Position = invertedWorldMatrix.PointTransform(vertex.Position);
vertex.Normal = invertedWorldMatrix.VectorTransform(vertex.Normal);
// 1. scale normals with node scales
var nodeScaling = BabylonVector3.FromArray(babylonAbstractMesh.scaling);
vertex.Normal = vertex.Normal.Multiply(Loader.Global.Point3.Create(Math.Abs(nodeScaling.X), Math.Abs(nodeScaling.Y), Math.Abs(nodeScaling.Z)));
// 2. scale normals with objectOffsetScales (unrotate by objectOffsetRot, then scale, then rotate again)
// note: LH coordinate system => flip y and z
var objOffsetScale = Loader.Global.Point3.Create(meshNode.MaxNode.ObjOffsetScale.S);
var scaleX = Math.Abs(objOffsetScale.X);
var scaleY = Math.Abs(objOffsetScale.Y);
var scaleZ = Math.Abs(objOffsetScale.Z);
var objOffsetScaleFlipYZInv = Loader.Global.Point3.Create(1 / scaleX, 1 / scaleZ, 1 / scaleY);
var objOffsetQuat = meshNode.MaxNode.ObjOffsetRot;
var qFlippedYZ = objOffsetQuat;
var tmpSwap = objOffsetQuat.Y;
qFlippedYZ.Y = objOffsetQuat.Z;
qFlippedYZ.Z = tmpSwap;
var nUnrotated = RotateVectorByQuaternion(vertex.Normal, qFlippedYZ);
var nUnrotatedScaled = nUnrotated.Multiply(objOffsetScaleFlipYZInv);
nUnrotatedScaled = nUnrotatedScaled.Normalize;
var nRerotatedScaled = RotateVectorByQuaternion(nUnrotatedScaled, qFlippedYZ.Conjugate);
vertex.Normal = nRerotatedScaled;
if (hasUV)
{
var indices = new int[3];
unsafe
{
fixed(int *indicesPtr = indices)
{
mesh.GetMapFaceIndex(1, face.MeshFaceIndex, new IntPtr(indicesPtr));
}
}
var texCoord = mesh.GetMapVertex(1, indices[facePart]);
vertex.UV = Loader.Global.Point2.Create(texCoord.X, -texCoord.Y);
}
if (hasUV2)
{
var indices = new int[3];
unsafe
{
fixed(int *indicesPtr = indices)
{
mesh.GetMapFaceIndex(2, face.MeshFaceIndex, new IntPtr(indicesPtr));
}
}
var texCoord = mesh.GetMapVertex(2, indices[facePart]);
vertex.UV2 = Loader.Global.Point2.Create(texCoord.X, -texCoord.Y);
}
if (hasColor)
{
var vertexColorIndex = (int)face.Color[facePart];
var vertexColor = mesh.GetColorVertex(vertexColorIndex);
float alpha = 1;
if (hasAlpha)
{
var indices = new int[3];
unsafe
{
fixed(int *indicesPtr = indices)
{
mesh.GetMapFaceIndex(-2, face.MeshFaceIndex, new IntPtr(indicesPtr));
}
}
var color = mesh.GetMapVertex(-2, indices[facePart]);
alpha = color.X;
}
vertex.Color = new[] { vertexColor.X, vertexColor.Y, vertexColor.Z, alpha };
}
if (skin != null)
{
float[] weight = new float[4] {
0, 0, 0, 0
};
int[] bone = new int[4] {
bonesCount, bonesCount, bonesCount, bonesCount
};
var nbBones = skin.GetNumberOfBones(vertexIndex);
int currentVtxBone = 0;
int currentSkinBone = 0;
// process skin bones until we have 4 bones for this vertex or we run out of skin bones
for (currentSkinBone = 0; currentSkinBone < nbBones && currentVtxBone < 4; ++currentSkinBone)
{
float boneWeight = skin.GetWeight(vertexIndex, currentSkinBone);
if (boneWeight <= 0)
{
continue;
}
bone[currentVtxBone] = boneIds.IndexOf(skin.GetIGameBone(vertexIndex, currentSkinBone).NodeID);
weight[currentVtxBone] = skin.GetWeight(vertexIndex, currentSkinBone);
++currentVtxBone;
}
// if we didnt have any bones with a weight > 0
if (currentVtxBone == 0)
{
weight[0] = 1.0f;
bone[0] = bonesCount;
}
vertex.Weights = Loader.Global.Point4.Create(weight);
vertex.BonesIndices = (bone[3] << 24) | (bone[2] << 16) | (bone[1] << 8) | bone[0];
if (currentVtxBone >= 4 && currentSkinBone < nbBones)
{
weight = new float[4] {
0, 0, 0, 0
};
bone = new int[4] {
bonesCount, bonesCount, bonesCount, bonesCount
};
// process remaining skin bones until we have a total of 8 bones for this vertex or we run out of skin bones
for (; currentSkinBone < nbBones && currentVtxBone < 8; ++currentSkinBone)
{
float boneWeight = skin.GetWeight(vertexIndex, currentSkinBone);
if (boneWeight <= 0)
{
continue;
}
if (isGltfExported)
{
RaiseError("Too many bone influences per vertex for vertexIndex: " + vertexIndex + ". glTF only supports up to 4 bone influences per vertex.", 2);
break;
}
bone[currentVtxBone - 4] = boneIds.IndexOf(skin.GetIGameBone(vertexIndex, currentSkinBone).NodeID);
weight[currentVtxBone - 4] = skin.GetWeight(vertexIndex, currentSkinBone);
++currentVtxBone;
}
// if we have any extra bone weights
if (currentVtxBone > 4)
{
vertex.WeightsExtra = Loader.Global.Point4.Create(weight);
vertex.BonesIndicesExtra = (bone[3] << 24) | (bone[2] << 16) | (bone[1] << 8) | bone[0];
if (currentSkinBone < nbBones)
{
// if we have more skin bones left, this means we have used up all our bones for this vertex
// check if any of the remaining bones has a weight > 0
for (; currentSkinBone < nbBones; ++currentSkinBone)
{
float boneWeight = skin.GetWeight(vertexIndex, currentSkinBone);
if (boneWeight <= 0)
{
continue;
}
RaiseError("Too many bone influences per vertex for vertexIndex: " + vertexIndex + ". Babylon.js only supports up to 8 bone influences per vertex.", 2);
break;
}
}
}
}
}
if (verticesAlreadyExported != null)
{
if (verticesAlreadyExported[vertexIndex] != null)
{
var index = verticesAlreadyExported[vertexIndex].IndexOf(vertex);
if (index > -1)
{
return(verticesAlreadyExported[vertexIndex][index].CurrentIndex);
}
}
else
{
verticesAlreadyExported[vertexIndex] = new List <GlobalVertex>();
}
vertex.CurrentIndex = vertices.Count;
verticesAlreadyExported[vertexIndex].Add(vertex);
}
vertices.Add(vertex);
return(vertices.Count - 1);
}
/// <summary>
/// Get TRS and visiblity animations of the transform
/// </summary>
/// <param name="transform">Transform above mesh/camera/light</param>
/// <returns></returns>
private List <BabylonAnimation> GetAnimation(MFnTransform transform)
{
// Animations
MPlugArray connections = new MPlugArray();
MStringArray animCurvList = new MStringArray();
MIntArray keysTime = new MIntArray();
MDoubleArray keysValue = new MDoubleArray();
MFloatArray translateValues = new MFloatArray();
MFloatArray rotateValues = new MFloatArray();
MFloatArray scaleValues = new MFloatArray();
MFloatArray visibilityValues = new MFloatArray();
MFloatArray keyTimes = new MFloatArray();
List <BabylonAnimationKey> keys = new List <BabylonAnimationKey>();
List <BabylonAnimation> animationsObject = new List <BabylonAnimation>();
//Get the animCurve
MGlobal.executeCommand("listConnections -type \"animCurve\" " + transform.fullPathName + ";", animCurvList);
List <AnimCurvData> animCurvesData = new List <AnimCurvData>();
foreach (String animCurv in animCurvList)
{
AnimCurvData animCurvData = new AnimCurvData();
animCurvesData.Add(animCurvData);
animCurvData.animCurv = animCurv;
//Get the key time for each curves
MGlobal.executeCommand("keyframe -q " + animCurv + ";", keysTime);
//Get the value for each curves
MGlobal.executeCommand("keyframe - q -vc -absolute " + animCurv + ";", keysValue);
if (animCurv.EndsWith("translateZ") || animCurv.EndsWith("rotateX") || animCurv.EndsWith("rotateY"))
{
for (int index = 0; index < keysTime.Count; index++)
{
// Switch coordinate system at object level
animCurvData.valuePerFrame.Add(keysTime[index], (float)keysValue[index] * -1.0f);
}
}
else
{
for (int index = 0; index < keysTime.Count; index++)
{
animCurvData.valuePerFrame.Add(keysTime[index], (float)keysValue[index]);
}
}
}
string[] mayaAnimationProperties = new string[] { "translate", "rotate", "scale" };
string[] babylonAnimationProperties = new string[] { "position", "rotationQuaternion", "scaling" };
string[] axis = new string[] { "X", "Y", "Z" };
// Init TRS default values
Dictionary <string, float> defaultValues = new Dictionary <string, float>();
float[] position = null;
float[] rotationQuaternion = null;
float[] rotation = null;
float[] scaling = null;
GetTransform(transform, ref position, ref rotationQuaternion, ref rotation, ref scaling); // coordinate system already switched
defaultValues.Add("translateX", position[0]);
defaultValues.Add("translateY", position[1]);
defaultValues.Add("translateZ", position[2]);
defaultValues.Add("rotateX", rotation[0]);
defaultValues.Add("rotateY", rotation[1]);
defaultValues.Add("rotateZ", rotation[2]);
defaultValues.Add("scaleX", scaling[0]);
defaultValues.Add("scaleY", scaling[1]);
defaultValues.Add("scaleZ", scaling[2]);
for (int indexAnimationProperty = 0; indexAnimationProperty < mayaAnimationProperties.Length; indexAnimationProperty++)
{
string mayaAnimationProperty = mayaAnimationProperties[indexAnimationProperty];
// Retreive animation curves data for current animation property
// Ex: all "translate" data are "translateX", "translateY", "translateZ"
List <AnimCurvData> animDataProperty = animCurvesData.Where(data => data.animCurv.Contains(mayaAnimationProperty)).ToList();
if (animDataProperty.Count == 0)
{
// Property is not animated
continue;
}
// Get all frames for this property
List <int> framesProperty = new List <int>();
foreach (var animData in animDataProperty)
{
framesProperty.AddRange(animData.valuePerFrame.Keys);
}
framesProperty = framesProperty.Distinct().ToList();
framesProperty.Sort();
// Get default values for this property
BabylonAnimationKey lastBabylonAnimationKey = new BabylonAnimationKey();
lastBabylonAnimationKey.frame = 0;
lastBabylonAnimationKey.values = new float[] { defaultValues[mayaAnimationProperty + "X"], defaultValues[mayaAnimationProperty + "Y"], defaultValues[mayaAnimationProperty + "Z"] };
// Compute all values for this property
List <BabylonAnimationKey> babylonAnimationKeys = new List <BabylonAnimationKey>();
foreach (var frameProperty in framesProperty)
{
BabylonAnimationKey babylonAnimationKey = new BabylonAnimationKey();
babylonAnimationKeys.Add(babylonAnimationKey);
// Frame
babylonAnimationKey.frame = frameProperty;
// Values
float[] valuesProperty = new float[3];
for (int indexAxis = 0; indexAxis < axis.Length; indexAxis++)
{
AnimCurvData animCurvDataAxis = animDataProperty.Find(data => data.animCurv.EndsWith(axis[indexAxis]));
float value;
if (animCurvDataAxis != null && animCurvDataAxis.valuePerFrame.ContainsKey(frameProperty))
{
value = animCurvDataAxis.valuePerFrame[frameProperty];
}
else
{
value = lastBabylonAnimationKey.values[indexAxis];
}
valuesProperty[indexAxis] = value;
}
babylonAnimationKey.values = valuesProperty.ToArray();
// Update last known values
lastBabylonAnimationKey = babylonAnimationKey;
}
// Convert euler to quaternion angles
if (indexAnimationProperty == 1) // Rotation
{
foreach (var babylonAnimationKey in babylonAnimationKeys)
{
BabylonVector3 eulerAngles = BabylonVector3.FromArray(babylonAnimationKey.values);
BabylonQuaternion quaternionAngles = eulerAngles.toQuaternion();
babylonAnimationKey.values = quaternionAngles.ToArray();
}
}
var keysFull = new List <BabylonAnimationKey>(babylonAnimationKeys);
// Optimization
OptimizeAnimations(babylonAnimationKeys, true);
// Ensure animation has at least 2 frames
if (IsAnimationKeysRelevant(keys))
{
// Create BabylonAnimation
string babylonAnimationProperty = babylonAnimationProperties[indexAnimationProperty];
animationsObject.Add(new BabylonAnimation()
{
dataType = indexAnimationProperty == 1 ? (int)BabylonAnimation.DataType.Quaternion : (int)BabylonAnimation.DataType.Vector3,
name = babylonAnimationProperty + " animation",
framePerSecond = 30,
loopBehavior = (int)BabylonAnimation.LoopBehavior.Cycle,
property = babylonAnimationProperty,
keys = babylonAnimationKeys.ToArray(),
keysFull = keysFull
});
}
}
return(animationsObject);
}
/// <summary>
/// Create a gltf node from the babylon node.
/// </summary>
/// <param name="babylonNode"></param>
/// <param name="gltf"></param>
/// <param name="babylonScene"></param>
/// <param name="gltfParentNode">The parent of the glTF node that will be created.</param>
/// <returns>The gltf node created.</returns>
private GLTFNode ExportNode(BabylonNode babylonNode, GLTF gltf, BabylonScene babylonScene, GLTFNode gltfParentNode)
{
RaiseMessage($"GLTFExporter | ExportNode {babylonNode.name}", 1);
GLTFNode gltfNode = null;
var type = babylonNode.GetType();
var nodeNodePair = nodeToGltfNodeMap.FirstOrDefault(pair => pair.Key.id.Equals(babylonNode.id));
if (nodeNodePair.Key != null)
{
return(nodeNodePair.Value);
}
var boneNodePair = boneToGltfNodeMap.FirstOrDefault(pair => pair.Key.id.Equals(babylonNode.id));
if (boneNodePair.Key != null)
{
return(boneNodePair.Value);
}
// Node
gltfNode = new GLTFNode
{
name = GetUniqueNodeName(babylonNode.name),
index = gltf.NodesList.Count
};
gltf.NodesList.Add(gltfNode); // add the node to the gltf list
nodeToGltfNodeMap.Add(babylonNode, gltfNode); // add the node to the global map
// Hierarchy
if (gltfParentNode != null)
{
RaiseMessage("GLTFExporter.Node| Add " + babylonNode.name + " as child to " + gltfParentNode.name, 2);
gltfParentNode.ChildrenList.Add(gltfNode.index);
gltfNode.parent = gltfParentNode;
}
else
{
// It's a root node
// Only root nodes are listed in a gltf scene
RaiseMessage("GLTFExporter.Node | Add " + babylonNode.name + " as root node to scene", 2);
gltf.scenes[0].NodesList.Add(gltfNode.index);
}
// Transform
// Position
gltfNode.translation = babylonNode.position;
// Rotation
if (type == typeof(BabylonAbstractMesh) || type.IsSubclassOf(typeof(BabylonAbstractMesh)) || type == typeof(BabylonCamera))
{
if (babylonNode.rotationQuaternion != null)
{
gltfNode.rotation = babylonNode.rotationQuaternion;
}
else
{
// Convert rotation vector to quaternion
BabylonVector3 rotationVector3 = new BabylonVector3
{
X = babylonNode.rotation[0],
Y = babylonNode.rotation[1],
Z = babylonNode.rotation[2]
};
gltfNode.rotation = rotationVector3.toQuaternion().ToArray();
}
}
else // Light
{
gltfNode.rotation = new float[4] {
0, 0, 0, 1
};
}
// Scale
if (type == typeof(BabylonAbstractMesh) || type.IsSubclassOf(typeof(BabylonAbstractMesh)))
{
gltfNode.scale = babylonNode.scaling;
}
else // Camera and light
{
gltfNode.scale = new float[3] {
1, 1, 1
};
}
// Switch coordinate system at object level
gltfNode.translation[2] *= -1;
gltfNode.rotation[0] *= -1;
gltfNode.rotation[1] *= -1;
return(gltfNode);
}
private GLTFNode ExportAbstractMesh(BabylonAbstractMesh babylonAbstractMesh, GLTF gltf, GLTFNode gltfParentNode, BabylonScene babylonScene)
{
RaiseMessage("GLTFExporter.AbstractMesh | Export abstract mesh named: " + babylonAbstractMesh.name, 1);
// Node
var gltfNode = new GLTFNode();
gltfNode.name = babylonAbstractMesh.name;
gltfNode.index = gltf.NodesList.Count;
gltf.NodesList.Add(gltfNode);
// Hierarchy
if (gltfParentNode != null)
{
RaiseMessage("GLTFExporter.AbstractMesh | Add " + babylonAbstractMesh.name + " as child to " + gltfParentNode.name, 2);
gltfParentNode.ChildrenList.Add(gltfNode.index);
gltfNode.parent = gltfParentNode;
}
else
{
// It's a root node
// Only root nodes are listed in a gltf scene
RaiseMessage("GLTFExporter.AbstractMesh | Add " + babylonAbstractMesh.name + " as root node to scene", 2);
gltf.scenes[0].NodesList.Add(gltfNode.index);
}
// Transform
gltfNode.translation = babylonAbstractMesh.position;
if (babylonAbstractMesh.rotationQuaternion != null)
{
gltfNode.rotation = babylonAbstractMesh.rotationQuaternion;
}
else
{
// Convert rotation vector to quaternion
BabylonVector3 rotationVector3 = new BabylonVector3
{
X = babylonAbstractMesh.rotation[0],
Y = babylonAbstractMesh.rotation[1],
Z = babylonAbstractMesh.rotation[2]
};
gltfNode.rotation = rotationVector3.toQuaternion().ToArray();
}
gltfNode.scale = babylonAbstractMesh.scaling;
// Switch coordinate system at object level
gltfNode.translation[2] *= -1;
gltfNode.rotation[0] *= -1;
gltfNode.rotation[1] *= -1;
// Mesh
var gltfMesh = gltf.MeshesList.Find(_gltfMesh => _gltfMesh.idGroupInstance == babylonAbstractMesh.idGroupInstance);
if (gltfMesh != null)
{
gltfNode.mesh = gltfMesh.index;
// Skin
if (gltfMesh.idBabylonSkeleton.HasValue)
{
var babylonSkeleton = babylonScene.skeletons[gltfMesh.idBabylonSkeleton.Value];
// Export a new skeleton if necessary and a new skin
var gltfSkin = ExportSkin(babylonSkeleton, gltf, gltfNode);
gltfNode.skin = gltfSkin.index;
}
}
// Animations
ExportNodeAnimation(babylonAbstractMesh, gltf, gltfNode, babylonScene);
return(gltfNode);
}
int CreateGlobalVertex(IIGameNode meshNode, IIGameMesh mesh, BabylonAbstractMesh babylonAbstractMesh, IMatrix3 invertedWorldMatrix, IFaceEx face, int facePart, List <GlobalVertex> vertices, bool hasUV, bool hasUV2, bool hasColor, bool hasAlpha, List <GlobalVertex>[] verticesAlreadyExported, IIGameSkin skin, List <int> boneIds)
{
var vertexIndex = (int)face.Vert[facePart];
// Position can by retreived in world space or object space
// Unfortunately, this value can't be retreived in local space
var vertex = new GlobalVertex
{
BaseIndex = vertexIndex,
Position = mesh.GetVertex(vertexIndex, false), // world space
Normal = mesh.GetNormal((int)face.Norm[facePart], false) // world space
};
if (exportParameters.exportTangents)
{
int indexTangentBinormal = mesh.GetFaceVertexTangentBinormal(face.MeshFaceIndex, facePart, 1);
IPoint3 normal = vertex.Normal.Normalize;
IPoint3 tangent = mesh.GetTangent(indexTangentBinormal, 1).Normalize;
IPoint3 bitangent = mesh.GetBinormal(indexTangentBinormal, 1).Normalize;
int w = GetW(normal, tangent, bitangent);
vertex.Tangent = new float[] { tangent.X, tangent.Y, tangent.Z, w };
}
// Convert position and normal to local space
vertex.Position = invertedWorldMatrix.PointTransform(vertex.Position);
vertex.Normal = invertedWorldMatrix.VectorTransform(vertex.Normal);
// 1. scale normals with node scales
var nodeScaling = BabylonVector3.FromArray(babylonAbstractMesh.scaling);
vertex.Normal = vertex.Normal.Multiply(Loader.Global.Point3.Create(Math.Abs(nodeScaling.X), Math.Abs(nodeScaling.Y), Math.Abs(nodeScaling.Z)));
// 2. scale normals with objectOffsetScales (unrotate by objectOffsetRot, then scale, then rotate again)
// note: LH coordinate system => flip y and z
var objOffsetScale = Loader.Global.Point3.Create(meshNode.MaxNode.ObjOffsetScale.S);
var scaleX = Math.Abs(objOffsetScale.X);
var scaleY = Math.Abs(objOffsetScale.Y);
var scaleZ = Math.Abs(objOffsetScale.Z);
var objOffsetScaleFlipYZInv = Loader.Global.Point3.Create(1 / scaleX, 1 / scaleZ, 1 / scaleY);
var objOffsetQuat = meshNode.MaxNode.ObjOffsetRot;
var qFlippedYZ = objOffsetQuat;
var tmpSwap = objOffsetQuat.Y;
qFlippedYZ.Y = objOffsetQuat.Z;
qFlippedYZ.Z = tmpSwap;
var nUnrotated = RotateVectorByQuaternion(vertex.Normal, qFlippedYZ);
var nUnrotatedScaled = nUnrotated.Multiply(objOffsetScaleFlipYZInv);
nUnrotatedScaled = nUnrotatedScaled.Normalize;
var nRerotatedScaled = RotateVectorByQuaternion(nUnrotatedScaled, qFlippedYZ.Conjugate);
vertex.Normal = nRerotatedScaled;
if (hasUV)
{
var indices = new int[3];
unsafe
{
fixed(int *indicesPtr = indices)
{
mesh.GetMapFaceIndex(1, face.MeshFaceIndex, new IntPtr(indicesPtr));
}
}
var texCoord = mesh.GetMapVertex(1, indices[facePart]);
vertex.UV = Loader.Global.Point2.Create(texCoord.X, -texCoord.Y);
}
if (hasUV2)
{
var indices = new int[3];
unsafe
{
fixed(int *indicesPtr = indices)
{
mesh.GetMapFaceIndex(2, face.MeshFaceIndex, new IntPtr(indicesPtr));
}
}
var texCoord = mesh.GetMapVertex(2, indices[facePart]);
vertex.UV2 = Loader.Global.Point2.Create(texCoord.X, -texCoord.Y);
}
if (hasColor)
{
var vertexColorIndex = (int)face.Color[facePart];
var vertexColor = mesh.GetColorVertex(vertexColorIndex);
float alpha = 1;
if (hasAlpha)
{
var indices = new int[3];
unsafe
{
fixed(int *indicesPtr = indices)
{
mesh.GetMapFaceIndex(-2, face.MeshFaceIndex, new IntPtr(indicesPtr));
}
}
var color = mesh.GetMapVertex(-2, indices[facePart]);
alpha = color.X;
}
vertex.Color = new[] { vertexColor.X, vertexColor.Y, vertexColor.Z, alpha };
}
if (skin != null)
{
float weight0 = 0;
float weight1 = 0;
float weight2 = 0;
float weight3 = 0;
int bone0 = bonesCount;
int bone1 = bonesCount;
int bone2 = bonesCount;
int bone3 = bonesCount;
var nbBones = skin.GetNumberOfBones(vertexIndex);
if (nbBones > 0)
{
bone0 = boneIds.IndexOf(skin.GetIGameBone(vertexIndex, 0).NodeID);
weight0 = skin.GetWeight(vertexIndex, 0);
}
if (nbBones > 1)
{
bone1 = boneIds.IndexOf(skin.GetIGameBone(vertexIndex, 1).NodeID);
weight1 = skin.GetWeight(vertexIndex, 1);
}
if (nbBones > 2)
{
bone2 = boneIds.IndexOf(skin.GetIGameBone(vertexIndex, 2).NodeID);
weight2 = skin.GetWeight(vertexIndex, 2);
}
if (nbBones > 3)
{
bone3 = boneIds.IndexOf(skin.GetIGameBone(vertexIndex, 3).NodeID);
weight3 = skin.GetWeight(vertexIndex, 3);
}
if (nbBones == 0)
{
weight0 = 1.0f;
bone0 = bonesCount;
}
vertex.Weights = Loader.Global.Point4.Create(weight0, weight1, weight2, weight3);
vertex.BonesIndices = (bone3 << 24) | (bone2 << 16) | (bone1 << 8) | bone0;
if (nbBones > 4)
{
bone0 = boneIds.IndexOf(skin.GetIGameBone(vertexIndex, 4).NodeID);
weight0 = skin.GetWeight(vertexIndex, 4);
weight1 = 0;
weight2 = 0;
weight3 = 0;
if (nbBones > 5)
{
bone1 = boneIds.IndexOf(skin.GetIGameBone(vertexIndex, 5).NodeID);
weight1 = skin.GetWeight(vertexIndex, 5);
}
if (nbBones > 6)
{
bone2 = boneIds.IndexOf(skin.GetIGameBone(vertexIndex, 6).NodeID);
weight2 = skin.GetWeight(vertexIndex, 6);
}
if (nbBones > 7)
{
bone3 = boneIds.IndexOf(skin.GetIGameBone(vertexIndex, 7).NodeID);
weight3 = skin.GetWeight(vertexIndex, 7);
}
vertex.WeightsExtra = Loader.Global.Point4.Create(weight0, weight1, weight2, weight3);
vertex.BonesIndicesExtra = (bone3 << 24) | (bone2 << 16) | (bone1 << 8) | bone0;
if (nbBones > 8)
{
RaiseError("Too many bones influences per vertex: " + nbBones + ". Babylon.js only support 8 bones influences per vertex.", 2);
}
}
}
if (verticesAlreadyExported != null)
{
if (verticesAlreadyExported[vertexIndex] != null)
{
var index = verticesAlreadyExported[vertexIndex].IndexOf(vertex);
if (index > -1)
{
return(verticesAlreadyExported[vertexIndex][index].CurrentIndex);
}
}
else
{
verticesAlreadyExported[vertexIndex] = new List <GlobalVertex>();
}
vertex.CurrentIndex = vertices.Count;
verticesAlreadyExported[vertexIndex].Add(vertex);
}
vertices.Add(vertex);
return(vertices.Count - 1);
}
private GLTFNode ExportMesh(BabylonMesh babylonMesh, GLTF gltf, GLTFNode gltfParentNode, BabylonScene babylonScene)
{
RaiseMessage("GLTFExporter.Mesh | Export mesh named: " + babylonMesh.name, 1);
// --------------------------
// ---------- Node ----------
// --------------------------
RaiseMessage("GLTFExporter.Mesh | Node", 2);
// Node
var gltfNode = new GLTFNode();
gltfNode.name = babylonMesh.name;
gltfNode.index = gltf.NodesList.Count;
gltf.NodesList.Add(gltfNode);
// Hierarchy
if (gltfParentNode != null)
{
RaiseMessage("GLTFExporter.Mesh | Add " + babylonMesh.name + " as child to " + gltfParentNode.name, 3);
gltfParentNode.ChildrenList.Add(gltfNode.index);
}
else
{
// It's a root node
// Only root nodes are listed in a gltf scene
RaiseMessage("GLTFExporter.Mesh | Add " + babylonMesh.name + " as root node to scene", 3);
gltf.scenes[0].NodesList.Add(gltfNode.index);
}
// Transform
gltfNode.translation = babylonMesh.position;
// TODO - Choose between this method and the extra root node
// Switch from left to right handed coordinate system
//gltfNode.translation[0] *= -1;
if (babylonMesh.rotationQuaternion != null)
{
gltfNode.rotation = babylonMesh.rotationQuaternion;
}
else
{
// Convert rotation vector to quaternion
BabylonVector3 rotationVector3 = new BabylonVector3
{
X = babylonMesh.rotation[0],
Y = babylonMesh.rotation[1],
Z = babylonMesh.rotation[2]
};
gltfNode.rotation = rotationVector3.toQuaternionGltf().ToArray();
}
gltfNode.scale = babylonMesh.scaling;
// --------------------------
// --- Mesh from babylon ----
// --------------------------
if (babylonMesh.positions == null)
{
RaiseMessage("GLTFExporter.Mesh | Mesh is a dummy", 2);
return(gltfNode);
}
RaiseMessage("GLTFExporter.Mesh | Mesh from babylon", 2);
// Retreive general data from babylon mesh
int nbVertices = babylonMesh.positions.Length / 3;
bool hasUV = babylonMesh.uvs != null && babylonMesh.uvs.Length > 0;
bool hasUV2 = babylonMesh.uvs2 != null && babylonMesh.uvs2.Length > 0;
bool hasColor = babylonMesh.colors != null && babylonMesh.colors.Length > 0;
RaiseMessage("GLTFExporter.Mesh | nbVertices=" + nbVertices, 3);
RaiseMessage("GLTFExporter.Mesh | hasUV=" + hasUV, 3);
RaiseMessage("GLTFExporter.Mesh | hasUV2=" + hasUV2, 3);
RaiseMessage("GLTFExporter.Mesh | hasColor=" + hasColor, 3);
// Retreive vertices data from babylon mesh
List <GLTFGlobalVertex> globalVertices = new List <GLTFGlobalVertex>();
for (int indexVertex = 0; indexVertex < nbVertices; indexVertex++)
{
GLTFGlobalVertex globalVertex = new GLTFGlobalVertex();
globalVertex.Position = createIPoint3(babylonMesh.positions, indexVertex);
// Switch from left to right handed coordinate system
//globalVertex.Position.X *= -1;
globalVertex.Normal = createIPoint3(babylonMesh.normals, indexVertex);
if (hasUV)
{
globalVertex.UV = createIPoint2(babylonMesh.uvs, indexVertex);
// For glTF, the origin of the UV coordinates (0, 0) corresponds to the upper left corner of a texture image
// While for Babylon, it corresponds to the lower left corner of a texture image
globalVertex.UV.Y = 1 - globalVertex.UV.Y;
}
if (hasUV2)
{
globalVertex.UV2 = createIPoint2(babylonMesh.uvs2, indexVertex);
// For glTF, the origin of the UV coordinates (0, 0) corresponds to the upper left corner of a texture image
// While for Babylon, it corresponds to the lower left corner of a texture image
globalVertex.UV2.Y = 1 - globalVertex.UV2.Y;
}
if (hasColor)
{
globalVertex.Color = createIPoint4(babylonMesh.colors, indexVertex).ToArray();
}
globalVertices.Add(globalVertex);
}
// Retreive indices from babylon mesh
List <ushort> babylonIndices = new List <ushort>();
babylonIndices = babylonMesh.indices.ToList().ConvertAll(new Converter <int, ushort>(n => (ushort)n));
// For triangle primitives in gltf, the front face has a counter-clockwise (CCW) winding order
// Swap face side
//for (int i = 0; i < babylonIndices.Count; i += 3)
//{
// var tmp = babylonIndices[i];
// babylonIndices[i] = babylonIndices[i + 2];
// babylonIndices[i + 2] = tmp;
//}
// --------------------------
// ------- Init glTF --------
// --------------------------
RaiseMessage("GLTFExporter.Mesh | Init glTF", 2);
// Mesh
var gltfMesh = new GLTFMesh {
name = babylonMesh.name
};
gltfMesh.index = gltf.MeshesList.Count;
gltf.MeshesList.Add(gltfMesh);
gltfNode.mesh = gltfMesh.index;
gltfMesh.gltfNode = gltfNode;
// Buffer
var buffer = new GLTFBuffer
{
uri = gltfMesh.name + ".bin"
};
buffer.index = gltf.BuffersList.Count;
gltf.BuffersList.Add(buffer);
// BufferView - Scalar
var bufferViewScalar = new GLTFBufferView
{
name = "bufferViewScalar",
buffer = buffer.index,
Buffer = buffer
};
bufferViewScalar.index = gltf.BufferViewsList.Count;
gltf.BufferViewsList.Add(bufferViewScalar);
// BufferView - Vector3
var bufferViewFloatVec3 = new GLTFBufferView
{
name = "bufferViewFloatVec3",
buffer = buffer.index,
Buffer = buffer,
byteOffset = 0,
byteStride = 12 // Field only defined for buffer views that contain vertex attributes. A vertex needs 3 * 4 bytes
};
bufferViewFloatVec3.index = gltf.BufferViewsList.Count;
gltf.BufferViewsList.Add(bufferViewFloatVec3);
// BufferView - Vector4
GLTFBufferView bufferViewFloatVec4 = null;
if (hasColor)
{
bufferViewFloatVec4 = new GLTFBufferView
{
name = "bufferViewFloatVec4",
buffer = buffer.index,
Buffer = buffer,
byteOffset = 0,
byteStride = 16 // Field only defined for buffer views that contain vertex attributes. A vertex needs 4 * 4 bytes
};
bufferViewFloatVec4.index = gltf.BufferViewsList.Count;
gltf.BufferViewsList.Add(bufferViewFloatVec4);
}
// BufferView - Vector2
GLTFBufferView bufferViewFloatVec2 = null;
if (hasUV || hasUV2)
{
bufferViewFloatVec2 = new GLTFBufferView
{
name = "bufferViewFloatVec2",
buffer = buffer.index,
Buffer = buffer,
byteStride = 8 // Field only defined for buffer views that contain vertex attributes. A vertex needs 2 * 4 bytes
};
bufferViewFloatVec2.index = gltf.BufferViewsList.Count;
gltf.BufferViewsList.Add(bufferViewFloatVec2);
}
// --------------------------
// ---- glTF primitives -----
// --------------------------
RaiseMessage("GLTFExporter.Mesh | glTF primitives", 2);
var meshPrimitives = new List <GLTFMeshPrimitive>();
// Global vertices are sorted per submesh
var globalVerticesSubMeshes = new List <List <GLTFGlobalVertex> >();
// In gltf, indices of each mesh primitive are 0-based (ie: min value is 0)
// Thus, the gltf indices list is a concatenation of sub lists all 0-based
// Example for 2 triangles, each being a submesh:
// babylonIndices = {0,1,2, 3,4,5} gives as result gltfIndicies = {0,1,2, 0,1,2}
var gltfIndices = new List <ushort>();
foreach (BabylonSubMesh babylonSubMesh in babylonMesh.subMeshes)
{
// --------------------------
// ------ SubMesh data ------
// --------------------------
List <GLTFGlobalVertex> globalVerticesSubMesh = globalVertices.GetRange(babylonSubMesh.verticesStart, babylonSubMesh.verticesCount);
globalVerticesSubMeshes.Add(globalVerticesSubMesh);
List <ushort> _indices = babylonIndices.GetRange(babylonSubMesh.indexStart, babylonSubMesh.indexCount);
// Indices of this submesh / primitive are updated to be 0-based
var minIndiceValue = _indices.Min(); // Should be equal to babylonSubMesh.indexStart
for (int indexIndice = 0; indexIndice < _indices.Count; indexIndice++)
{
_indices[indexIndice] -= minIndiceValue;
}
gltfIndices.AddRange(_indices);
// --------------------------
// -- Init glTF primitive ---
// --------------------------
// MeshPrimitive
var meshPrimitive = new GLTFMeshPrimitive
{
attributes = new Dictionary <string, int>()
};
meshPrimitives.Add(meshPrimitive);
// Accessor - Indices
var accessorIndices = new GLTFAccessor
{
name = "accessorIndices",
bufferView = bufferViewScalar.index,
BufferView = bufferViewScalar,
componentType = GLTFAccessor.ComponentType.UNSIGNED_SHORT,
type = GLTFAccessor.TypeEnum.SCALAR.ToString()
};
accessorIndices.index = gltf.AccessorsList.Count;
gltf.AccessorsList.Add(accessorIndices);
meshPrimitive.indices = accessorIndices.index;
// Accessor - Positions
var accessorPositions = new GLTFAccessor
{
name = "accessorPositions",
bufferView = bufferViewFloatVec3.index,
BufferView = bufferViewFloatVec3,
componentType = GLTFAccessor.ComponentType.FLOAT,
type = GLTFAccessor.TypeEnum.VEC3.ToString(),
min = new float[] { float.MaxValue, float.MaxValue, float.MaxValue },
max = new float[] { float.MinValue, float.MinValue, float.MinValue }
};
accessorPositions.index = gltf.AccessorsList.Count;
gltf.AccessorsList.Add(accessorPositions);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.POSITION.ToString(), accessorPositions.index);
// Accessor - Normals
var accessorNormals = new GLTFAccessor
{
name = "accessorNormals",
bufferView = bufferViewFloatVec3.index,
BufferView = bufferViewFloatVec3,
componentType = GLTFAccessor.ComponentType.FLOAT,
type = GLTFAccessor.TypeEnum.VEC3.ToString()
};
accessorNormals.index = gltf.AccessorsList.Count;
gltf.AccessorsList.Add(accessorNormals);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.NORMAL.ToString(), accessorNormals.index);
// Accessor - Colors
GLTFAccessor accessorColors = null;
if (hasColor)
{
accessorColors = new GLTFAccessor
{
name = "accessorColors",
bufferView = bufferViewFloatVec4.index,
BufferView = bufferViewFloatVec4,
componentType = GLTFAccessor.ComponentType.FLOAT,
type = GLTFAccessor.TypeEnum.VEC4.ToString()
};
accessorColors.index = gltf.AccessorsList.Count;
gltf.AccessorsList.Add(accessorColors);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.COLOR_0.ToString(), accessorColors.index);
}
// Accessor - UV
GLTFAccessor accessorUVs = null;
if (hasUV)
{
accessorUVs = new GLTFAccessor
{
name = "accessorUVs",
bufferView = bufferViewFloatVec2.index,
BufferView = bufferViewFloatVec2,
componentType = GLTFAccessor.ComponentType.FLOAT,
type = GLTFAccessor.TypeEnum.VEC2.ToString()
};
accessorUVs.index = gltf.AccessorsList.Count;
gltf.AccessorsList.Add(accessorUVs);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.TEXCOORD_0.ToString(), accessorUVs.index);
}
// Accessor - UV2
GLTFAccessor accessorUV2s = null;
if (hasUV2)
{
accessorUV2s = new GLTFAccessor
{
name = "accessorUV2s",
bufferView = bufferViewFloatVec2.index,
BufferView = bufferViewFloatVec2,
componentType = GLTFAccessor.ComponentType.FLOAT,
type = GLTFAccessor.TypeEnum.VEC2.ToString()
};
accessorUV2s.index = gltf.AccessorsList.Count;
gltf.AccessorsList.Add(accessorUV2s);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.TEXCOORD_1.ToString(), accessorUV2s.index);
}
// --------------------------
// - Update glTF primitive --
// --------------------------
RaiseMessage("GLTFExporter.Mesh | Mesh as glTF", 3);
// Material
if (babylonMesh.materialId != null)
{
// Retreive the babylon material
var babylonMaterialId = babylonMesh.materialId;
var babylonMaterials = new List <BabylonMaterial>(babylonScene.materials);
var babylonMaterial = babylonMaterials.Find(_babylonMaterial => _babylonMaterial.id == babylonMaterialId);
if (babylonMaterial == null)
{
// It's a multi material
var babylonMultiMaterials = new List <BabylonMultiMaterial>(babylonScene.multiMaterials);
var babylonMultiMaterial = babylonMultiMaterials.Find(_babylonMultiMaterial => _babylonMultiMaterial.id == babylonMesh.materialId);
babylonMaterialId = babylonMultiMaterial.materials[babylonSubMesh.materialIndex];
babylonMaterial = babylonMaterials.Find(_babylonMaterial => _babylonMaterial.id == babylonMaterialId);
}
// Update primitive material index
var indexMaterial = babylonMaterialsToExport.FindIndex(_babylonMaterial => _babylonMaterial == babylonMaterial);
if (indexMaterial == -1)
{
// Store material for exportation
indexMaterial = babylonMaterialsToExport.Count;
babylonMaterialsToExport.Add(babylonMaterial);
}
meshPrimitive.material = indexMaterial;
// TODO - Add and retreive info from babylon material
meshPrimitive.mode = GLTFMeshPrimitive.FillMode.TRIANGLES;
}
// Update min and max vertex position for each component (X, Y, Z)
globalVerticesSubMesh.ForEach((globalVertex) =>
{
var positionArray = new float[] { globalVertex.Position.X, globalVertex.Position.Y, globalVertex.Position.Z };
for (int indexComponent = 0; indexComponent < positionArray.Length; indexComponent++)
{
if (positionArray[indexComponent] < accessorPositions.min[indexComponent])
{
accessorPositions.min[indexComponent] = positionArray[indexComponent];
}
if (positionArray[indexComponent] > accessorPositions.max[indexComponent])
{
accessorPositions.max[indexComponent] = positionArray[indexComponent];
}
}
});
// Update byte length and count of accessors, bufferViews and buffers
// Scalar
AddElementsToAccessor(accessorIndices, _indices.Count);
// Vector3
AddElementsToAccessor(accessorPositions, globalVerticesSubMesh.Count);
AddElementsToAccessor(accessorNormals, globalVerticesSubMesh.Count);
// Vector4
if (hasColor)
{
AddElementsToAccessor(accessorColors, globalVerticesSubMesh.Count);
}
// Vector2
if (hasUV)
{
AddElementsToAccessor(accessorUVs, globalVerticesSubMesh.Count);
}
if (hasUV2)
{
AddElementsToAccessor(accessorUV2s, globalVerticesSubMesh.Count);
}
}
gltfMesh.primitives = meshPrimitives.ToArray();
// Update byte offset of bufferViews
GLTFBufferView lastBufferView = null;
gltf.BufferViewsList.FindAll(bufferView => bufferView.buffer == buffer.index).ForEach(bufferView =>
{
if (lastBufferView != null)
{
bufferView.byteOffset = lastBufferView.byteOffset + lastBufferView.byteLength;
}
lastBufferView = bufferView;
});
// --------------------------
// --------- Saving ---------
// --------------------------
string outputBinaryFile = Path.Combine(gltf.OutputPath, gltfMesh.name + ".bin");
RaiseMessage("GLTFExporter.Mesh | Saving " + outputBinaryFile, 2);
// Write data to binary file
using (BinaryWriter writer = new BinaryWriter(File.Open(outputBinaryFile, FileMode.Create)))
{
// BufferView - Scalar
gltfIndices.ForEach(n => writer.Write(n));
// BufferView - Vector3
globalVerticesSubMeshes.ForEach(globalVerticesSubMesh =>
{
List <float> vertices = globalVerticesSubMesh.SelectMany(v => new[] { v.Position.X, v.Position.Y, v.Position.Z }).ToList();
vertices.ForEach(n => writer.Write(n));
List <float> normals = globalVerticesSubMesh.SelectMany(v => new[] { v.Normal.X, v.Normal.Y, v.Normal.Z }).ToList();
normals.ForEach(n => writer.Write(n));
});
// BufferView - Vector4
globalVerticesSubMeshes.ForEach(globalVerticesSubMesh =>
{
if (hasColor)
{
List <float> colors = globalVerticesSubMesh.SelectMany(v => new[] { v.Color[0], v.Color[1], v.Color[2], v.Color[3] }).ToList();
colors.ForEach(n => writer.Write(n));
}
});
// BufferView - Vector2
globalVerticesSubMeshes.ForEach(globalVerticesSubMesh =>
{
if (hasUV)
{
List <float> uvs = globalVerticesSubMesh.SelectMany(v => new[] { v.UV.X, v.UV.Y }).ToList();
uvs.ForEach(n => writer.Write(n));
}
if (hasUV2)
{
List <float> uvs2 = globalVerticesSubMesh.SelectMany(v => new[] { v.UV2.X, v.UV2.Y }).ToList();
uvs2.ForEach(n => writer.Write(n));
}
});
}
return(gltfNode);
}
/// <summary>
/// Create a gltf node from the babylon node.
/// </summary>
/// <param name="babylonNode"></param>
/// <param name="gltf"></param>
/// <param name="babylonScene"></param>
/// <param name="gltfParentNode">The parent of the glTF node that will be created.</param>
/// <returns>The gltf node created.</returns>
private GLTFNode ExportNode(BabylonNode babylonNode, GLTF gltf, BabylonScene babylonScene, GLTFNode gltfParentNode)
{
logger.RaiseMessage($"GLTFExporter | ExportNode {babylonNode.name}", 1);
GLTFNode gltfNode = null;
var type = babylonNode.GetType();
var nodeNodePair = nodeToGltfNodeMap.FirstOrDefault(pair => pair.Key.id.Equals(babylonNode.id));
if (nodeNodePair.Key != null)
{
return(nodeNodePair.Value);
}
// Node
gltfNode = new GLTFNode
{
name = GetUniqueNodeName(babylonNode.name),
index = gltf.NodesList.Count
};
// User Custom Attributes
if (babylonNode.metadata != null && babylonNode.metadata.Count != 0)
{
gltfNode.extras = babylonNode.metadata;
}
gltf.NodesList.Add(gltfNode); // add the node to the gltf list
nodeToGltfNodeMap.Add(babylonNode, gltfNode); // add the node to the global map
// Hierarchy
if (gltfParentNode != null)
{
logger.RaiseMessage("GLTFExporter.Node| Add " + babylonNode.name + " as child to " + gltfParentNode.name, 2);
gltfParentNode.ChildrenList.Add(gltfNode.index);
gltfNode.parent = gltfParentNode;
}
else
{
// It's a root node
// Only root nodes are listed in a gltf scene
logger.RaiseMessage("GLTFExporter.Node | Add " + babylonNode.name + " as root node to scene", 2);
gltf.scenes[0].NodesList.Add(gltfNode.index);
}
// TRS
if (exportParameters.exportAnimationsOnly == false)
{
// Position
gltfNode.translation = babylonNode.position;
// Rotation
if (babylonNode.rotationQuaternion != null)
{
gltfNode.rotation = babylonNode.rotationQuaternion;
}
else
{
// Convert rotation vector to quaternion
BabylonVector3 rotationVector3 = new BabylonVector3
{
X = babylonNode.rotation[0],
Y = babylonNode.rotation[1],
Z = babylonNode.rotation[2]
};
gltfNode.rotation = rotationVector3.toQuaternion().ToArray();
}
// Scale
gltfNode.scale = babylonNode.scaling;
// Switch coordinate system at object level
gltfNode.translation[2] *= -1;
gltfNode.rotation[0] *= -1;
gltfNode.rotation[1] *= -1;
}
ExportGLTFExtension(babylonNode, ref gltfNode, gltf);
return(gltfNode);
}
/// <summary>
/// Create a gltf node from the babylon node.
/// </summary>
/// <param name="babylonNode"></param>
/// <param name="gltf"></param>
/// <param name="babylonScene"></param>
/// <param name="gltfParentNode">The parent of the glTF node that will be created.</param>
/// <returns>The gltf node created.</returns>
private GLTFNode ExportNode(BabylonNode babylonNode, GLTF gltf, BabylonScene babylonScene, GLTFNode gltfParentNode)
{
RaiseMessage($"GLTFExporter | ExportNode {babylonNode.name}", 1);
GLTFNode gltfNode = null;
var type = babylonNode.GetType();
var nodeNodePair = nodeToGltfNodeMap.FirstOrDefault(pair => pair.Key.id.Equals(babylonNode.id));
if (nodeNodePair.Key != null)
{
return(nodeNodePair.Value);
}
var boneNodePair = boneToGltfNodeMap.FirstOrDefault(pair => pair.Key.id.Equals(babylonNode.id));
if (boneNodePair.Key != null)
{
return(boneNodePair.Value);
}
// Node
gltfNode = new GLTFNode
{
name = GetUniqueNodeName(babylonNode.name),
index = gltf.NodesList.Count
};
gltf.NodesList.Add(gltfNode); // add the node to the gltf list
nodeToGltfNodeMap.Add(babylonNode, gltfNode); // add the node to the global map
// Hierarchy
if (gltfParentNode != null)
{
RaiseMessage("GLTFExporter.Node| Add " + babylonNode.name + " as child to " + gltfParentNode.name, 2);
gltfParentNode.ChildrenList.Add(gltfNode.index);
gltfNode.parent = gltfParentNode;
}
else
{
// It's a root node
// Only root nodes are listed in a gltf scene
RaiseMessage("GLTFExporter.Node | Add " + babylonNode.name + " as root node to scene", 2);
gltf.scenes[0].NodesList.Add(gltfNode.index);
}
// Transform
// Position
gltfNode.translation = babylonNode.position;
// Rotation
if (babylonNode.rotationQuaternion != null)
{
gltfNode.rotation = babylonNode.rotationQuaternion;
}
else
{
// Convert rotation vector to quaternion
BabylonVector3 rotationVector3 = new BabylonVector3
{
X = babylonNode.rotation[0],
Y = babylonNode.rotation[1],
Z = babylonNode.rotation[2]
};
gltfNode.rotation = rotationVector3.toQuaternion().ToArray();
}
// Scale
gltfNode.scale = babylonNode.scaling;
// Switch coordinate system at object level
gltfNode.translation[2] *= -1;
gltfNode.rotation[0] *= -1;
gltfNode.rotation[1] *= -1;
// Kuesa layers
if (exportParameters.kuesaExportLayers && babylonNode.kuesaLayers != null)
{
Dictionary <string, List <int> > layers = new Dictionary <string, List <int> >();
List <int> indexes = babylonNode.kuesaLayers.ToList <int>();
layers["layers"] = new List <int>();
layers["layers"].AddRange(indexes);
if (gltfNode.extensions == null)
{
gltfNode.extensions = new GLTFExtensions();
}
gltfNode.extensions["KDAB_Kuesa_Layers"] = layers;
}
return(gltfNode);
}
private GLTFAnimation ExportBoneAnimation(BabylonBone babylonBone, GLTF gltf, GLTFNode gltfNode)
{
GLTFAnimation gltfAnimation = null;
if (gltf.AnimationsList.Count > 0)
{
gltfAnimation = gltf.AnimationsList[0];
}
else
{
gltfAnimation = new GLTFAnimation();
gltf.AnimationsList.Add(gltfAnimation);
}
var channelList = gltfAnimation.ChannelList;
var samplerList = gltfAnimation.SamplerList;
if (babylonBone.animation != null && babylonBone.animation.property == "_matrix")
{
RaiseMessage("GLTFExporter.Animation | Export animation of bone named: " + babylonBone.name, 2);
var babylonAnimation = babylonBone.animation;
// --- Input ---
var accessorInput = _createAndPopulateInput(gltf, babylonAnimation);
// --- Output ---
var paths = new string[] { "translation", "rotation", "scale" };
var accessorOutputByPath = new Dictionary <string, GLTFAccessor>();
foreach (string path in paths)
{
GLTFAccessor accessorOutput = _createAccessorOfPath(path, gltf);
accessorOutputByPath.Add(path, accessorOutput);
}
// Populate accessors
foreach (var babylonAnimationKey in babylonAnimation.keys)
{
var matrix = new BabylonMatrix();
matrix.m = babylonAnimationKey.values;
var translationBabylon = new BabylonVector3();
var rotationQuatBabylon = new BabylonQuaternion();
var scaleBabylon = new BabylonVector3();
matrix.decompose(scaleBabylon, rotationQuatBabylon, translationBabylon);
translationBabylon.Z *= -1;
BabylonVector3 rotationVector3 = rotationQuatBabylon.toEulerAngles();
rotationVector3.X *= -1;
rotationVector3.Y *= -1;
rotationQuatBabylon = rotationVector3.toQuaternion();
var outputValuesByPath = new Dictionary <string, float[]>();
outputValuesByPath.Add("translation", translationBabylon.ToArray());
outputValuesByPath.Add("rotation", rotationQuatBabylon.ToArray());
outputValuesByPath.Add("scale", scaleBabylon.ToArray());
// Store values as bytes
foreach (string path in paths)
{
var accessorOutput = accessorOutputByPath[path];
var outputValues = outputValuesByPath[path];
foreach (var outputValue in outputValues)
{
accessorOutput.bytesList.AddRange(BitConverter.GetBytes(outputValue));
}
accessorOutput.count++;
}
}
;
foreach (string path in paths)
{
var accessorOutput = accessorOutputByPath[path];
// Animation sampler
var gltfAnimationSampler = new GLTFAnimationSampler
{
input = accessorInput.index,
output = accessorOutput.index
};
gltfAnimationSampler.index = samplerList.Count;
samplerList.Add(gltfAnimationSampler);
// Target
var gltfTarget = new GLTFChannelTarget
{
node = gltfNode.index
};
gltfTarget.path = path;
// Channel
var gltfChannel = new GLTFChannel
{
sampler = gltfAnimationSampler.index,
target = gltfTarget
};
channelList.Add(gltfChannel);
}
}
return(gltfAnimation);
}
private GLTFSkin ExportSkin(BabylonSkeleton babylonSkeleton, GLTF gltf, GLTFNode gltfNode)
{
RaiseMessage("GLTFExporter.Skin | Export skin of node '" + gltfNode.name + "' based on skeleton '" + babylonSkeleton.name + "'", 2);
// Retreive gltf skeleton data if babylon skeleton has already been exported
if (!alreadyExportedSkeletons.ContainsKey(babylonSkeleton))
{
alreadyExportedSkeletons.Add(babylonSkeleton, new BabylonSkeletonExportData());
// Switch coordinate system at object level
foreach (var babylonBone in babylonSkeleton.bones)
{
var boneLocalMatrix = new BabylonMatrix();
boneLocalMatrix.m = babylonBone.matrix;
var translationBabylon = new BabylonVector3();
var rotationQuatBabylon = new BabylonQuaternion();
var scale = new BabylonVector3();
boneLocalMatrix.decompose(scale, rotationQuatBabylon, translationBabylon);
translationBabylon.Z *= -1;
rotationQuatBabylon.X *= -1;
rotationQuatBabylon.Y *= -1;
boneLocalMatrix = BabylonMatrix.Compose(scale, rotationQuatBabylon, translationBabylon);
babylonBone.matrix = boneLocalMatrix.m;
}
}
var babylonSkeletonExportData = alreadyExportedSkeletons[babylonSkeleton];
// Skin
var nameSuffix = babylonSkeletonExportData.nb != 0 ? "_" + babylonSkeletonExportData.nb : "";
GLTFSkin gltfSkin = new GLTFSkin
{
name = babylonSkeleton.name + nameSuffix
};
gltfSkin.index = gltf.SkinsList.Count;
gltf.SkinsList.Add(gltfSkin);
babylonSkeletonExportData.nb++;
var bones = new List <BabylonBone>(babylonSkeleton.bones);
// Compute and store world matrix of each bone
var bonesWorldMatrices = new Dictionary <int, BabylonMatrix>();
foreach (var babylonBone in babylonSkeleton.bones)
{
if (!bonesWorldMatrices.ContainsKey(babylonBone.index))
{
BabylonMatrix boneWorldMatrix = _getBoneWorldMatrix(babylonBone, bones);
bonesWorldMatrices.Add(babylonBone.index, boneWorldMatrix);
}
}
// Buffer
var buffer = GLTFBufferService.Instance.GetBuffer(gltf);
// Accessor - InverseBindMatrices
var accessorInverseBindMatrices = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatMat4(gltf, buffer),
"accessorInverseBindMatrices",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.MAT4
);
gltfSkin.inverseBindMatrices = accessorInverseBindMatrices.index;
// World matrix of the node
var nodeWorldMatrix = _getNodeWorldMatrix(gltfNode);
var gltfJoints = new List <int>();
foreach (var babylonBone in babylonSkeleton.bones)
{
GLTFNode gltfBoneNode = null;
if (!babylonSkeletonExportData.nodeByBone.ContainsKey(babylonBone))
{
// Export bone as a new node
gltfBoneNode = _exportBone(babylonBone, gltf, babylonSkeleton, bones);
babylonSkeletonExportData.nodeByBone.Add(babylonBone, gltfBoneNode);
}
gltfBoneNode = babylonSkeletonExportData.nodeByBone[babylonBone];
gltfJoints.Add(gltfBoneNode.index);
// Set this bone as skeleton if it is a root
// Meaning of 'skeleton' here is the top root bone
if (babylonBone.parentBoneIndex == -1)
{
gltfSkin.skeleton = gltfBoneNode.index;
}
// Compute inverseBindMatrice for this bone when attached to this node
var boneLocalMatrix = new BabylonMatrix();
boneLocalMatrix.m = babylonBone.matrix;
//printMatrix("boneLocalMatrix[" + babylonBone.name + "]", boneLocalMatrix);
BabylonMatrix boneWorldMatrix = null;
if (babylonBone.parentBoneIndex == -1)
{
boneWorldMatrix = boneLocalMatrix;
}
else
{
var parentWorldMatrix = bonesWorldMatrices[babylonBone.parentBoneIndex];
// Remove scale of parent
// This actually enable to take into account the scale of the bones, except for the root one
parentWorldMatrix = _removeScale(parentWorldMatrix);
boneWorldMatrix = boneLocalMatrix * parentWorldMatrix;
}
//printMatrix("boneWorldMatrix[" + babylonBone.name + "]", boneWorldMatrix);
var inverseBindMatrices = nodeWorldMatrix * BabylonMatrix.Invert(boneWorldMatrix);
// Populate accessor
List <float> matrix = new List <float>(inverseBindMatrices.m);
matrix.ForEach(n => accessorInverseBindMatrices.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorInverseBindMatrices.count++;
}
gltfSkin.joints = gltfJoints.ToArray();
return(gltfSkin);
}
private void ExportBoneAnimation(GLTFAnimation gltfAnimation, int startFrame, int endFrame, GLTF gltf, BabylonNode babylonNode, GLTFNode gltfNode, BabylonAnimationGroup animationGroup = null)
{
var channelList = gltfAnimation.ChannelList;
var samplerList = gltfAnimation.SamplerList;
if (babylonNode.animations != null && babylonNode.animations[0].property == "_matrix")
{
logger.RaiseMessage("GLTFExporter.Animation | Export animation of bone named: " + babylonNode.name, 2);
BabylonAnimation babylonAnimation = null;
if (animationGroup != null)
{
var targetedAnimation = animationGroup.targetedAnimations.FirstOrDefault(animation => animation.targetId == babylonNode.id);
if (targetedAnimation != null)
{
babylonAnimation = targetedAnimation.animation;
}
}
// otherwise fall back to the full animation track on the node.
if (babylonAnimation == null)
{
babylonAnimation = babylonNode.animations[0];
}
var babylonAnimationKeysInRange = babylonAnimation.keys.Where(key => key.frame >= startFrame && key.frame <= endFrame);
if (babylonAnimationKeysInRange.Count() <= 0)
{
return;
}
// --- Input ---
var accessorInput = _createAndPopulateInput(gltf, babylonAnimation, startFrame, endFrame);
if (accessorInput == null)
{
return;
}
// --- Output ---
var paths = new string[] { "translation", "rotation", "scale" };
var accessorOutputByPath = new Dictionary <string, GLTFAccessor>();
foreach (string path in paths)
{
GLTFAccessor accessorOutput = _createAccessorOfPath(path, gltf);
accessorOutputByPath.Add(path, accessorOutput);
}
// Populate accessors
foreach (var babylonAnimationKey in babylonAnimationKeysInRange)
{
var matrix = new BabylonMatrix();
matrix.m = babylonAnimationKey.values;
var translationBabylon = new BabylonVector3();
var rotationQuatBabylon = new BabylonQuaternion();
var scaleBabylon = new BabylonVector3();
matrix.decompose(scaleBabylon, rotationQuatBabylon, translationBabylon);
// Switch coordinate system at object level
translationBabylon.Z *= -1;
rotationQuatBabylon.X *= -1;
rotationQuatBabylon.Y *= -1;
var outputValuesByPath = new Dictionary <string, float[]>();
outputValuesByPath.Add("translation", translationBabylon.ToArray());
outputValuesByPath.Add("rotation", rotationQuatBabylon.ToArray());
outputValuesByPath.Add("scale", scaleBabylon.ToArray());
// Store values as bytes
foreach (string path in paths)
{
var accessorOutput = accessorOutputByPath[path];
var outputValues = outputValuesByPath[path];
foreach (var outputValue in outputValues)
{
accessorOutput.bytesList.AddRange(BitConverter.GetBytes(outputValue));
}
accessorOutput.count++;
}
}
;
foreach (string path in paths)
{
var accessorOutput = accessorOutputByPath[path];
// Animation sampler
var gltfAnimationSampler = new GLTFAnimationSampler
{
input = accessorInput.index,
output = accessorOutput.index
};
gltfAnimationSampler.index = samplerList.Count;
samplerList.Add(gltfAnimationSampler);
// Target
var gltfTarget = new GLTFChannelTarget
{
node = gltfNode.index
};
gltfTarget.path = path;
// Channel
var gltfChannel = new GLTFChannel
{
sampler = gltfAnimationSampler.index,
target = gltfTarget
};
channelList.Add(gltfChannel);
}
}
ExportGLTFExtension(babylonNode, ref gltfAnimation, gltf);
}
private GLTFCamera ExportCamera(BabylonCamera babylonCamera, GLTF gltf, GLTFNode gltfParentNode)
{
RaiseMessage("GLTFExporter.Camera | Export camera named: " + babylonCamera.name, 1);
// --------------------------
// ---------- Node ----------
// --------------------------
RaiseMessage("GLTFExporter.Camera | Node", 2);
// Node
var gltfNode = new GLTFNode();
gltfNode.name = GetUniqueNodeName(babylonCamera.name);
gltfNode.index = gltf.NodesList.Count;
gltf.NodesList.Add(gltfNode);
// Hierarchy
if (gltfParentNode != null)
{
RaiseMessage("GLTFExporter.Camera | Add " + babylonCamera.name + " as child to " + gltfParentNode.name, 3);
gltfParentNode.ChildrenList.Add(gltfNode.index);
gltfNode.parent = gltfParentNode;
}
else
{
// It's a root node
// Only root nodes are listed in a gltf scene
RaiseMessage("GLTFExporter.Camera | Add " + babylonCamera.name + " as root node to scene", 3);
gltf.scenes[0].NodesList.Add(gltfNode.index);
}
// Transform
gltfNode.translation = babylonCamera.position;
if (babylonCamera.rotationQuaternion != null)
{
gltfNode.rotation = babylonCamera.rotationQuaternion;
}
else
{
// Convert rotation vector to quaternion
BabylonVector3 rotationVector3 = new BabylonVector3
{
X = babylonCamera.rotation[0],
Y = babylonCamera.rotation[1],
Z = babylonCamera.rotation[2]
};
gltfNode.rotation = rotationVector3.toQuaternion().ToArray();
}
// No scaling defined for babylon camera. Use identity instead.
gltfNode.scale = new float[3] {
1, 1, 1
};
// Switch coordinate system at object level
gltfNode.translation[2] *= -1;
gltfNode.rotation[0] *= -1;
gltfNode.rotation[1] *= -1;
// Animations
ExportNodeAnimation(babylonCamera, gltf, gltfNode);
// --- prints ---
#region prints
RaiseVerbose("GLTFExporter.Camera | babylonCamera data", 2);
RaiseVerbose("GLTFExporter.Camera | babylonCamera.type=" + babylonCamera.type, 3);
RaiseVerbose("GLTFExporter.Camera | babylonCamera.fov=" + babylonCamera.fov, 3);
RaiseVerbose("GLTFExporter.Camera | babylonCamera.maxZ=" + babylonCamera.maxZ, 3);
RaiseVerbose("GLTFExporter.Camera | babylonCamera.minZ=" + babylonCamera.minZ, 3);
#endregion
// --------------------------
// ------- gltfCamera -------
// --------------------------
RaiseMessage("GLTFExporter.Camera | create gltfCamera", 2);
// Camera
var gltfCamera = new GLTFCamera {
name = babylonCamera.name
};
gltfCamera.index = gltf.CamerasList.Count;
gltf.CamerasList.Add(gltfCamera);
gltfNode.camera = gltfCamera.index;
gltfCamera.gltfNode = gltfNode;
// Camera type
switch (babylonCamera.mode)
{
case (BabylonCamera.CameraMode.ORTHOGRAPHIC_CAMERA):
var gltfCameraOrthographic = new GLTFCameraOrthographic();
gltfCameraOrthographic.xmag = 1; // Do not bother about it - still mandatory
gltfCameraOrthographic.ymag = 1; // Do not bother about it - still mandatory
gltfCameraOrthographic.zfar = babylonCamera.maxZ;
gltfCameraOrthographic.znear = babylonCamera.minZ;
gltfCamera.type = GLTFCamera.CameraType.orthographic.ToString();
gltfCamera.orthographic = gltfCameraOrthographic;
break;
case (BabylonCamera.CameraMode.PERSPECTIVE_CAMERA):
var gltfCameraPerspective = new GLTFCameraPerspective();
gltfCameraPerspective.aspectRatio = null; // Do not bother about it - use default glTF value
gltfCameraPerspective.yfov = babylonCamera.fov; // Babylon camera fov mode is assumed to be vertical (FOVMODE_VERTICAL_FIXED)
gltfCameraPerspective.zfar = babylonCamera.maxZ;
gltfCameraPerspective.znear = babylonCamera.minZ;
gltfCamera.type = GLTFCamera.CameraType.perspective.ToString();
gltfCamera.perspective = gltfCameraPerspective;
break;
default:
RaiseError("GLTFExporter.Camera | camera mode not found");
break;
}
return(gltfCamera);
}
