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 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 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 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 });
});
}
}
private void exportTransform(BabylonAbstractMesh babylonAbstractMesh, IIGameNode maxGameNode)
{
// Position / rotation / scaling
var localTM = GetLocalTM(maxGameNode, 0);
var meshTrans = localTM.Translation;
var meshRotation = localTM.Rotation;
var meshScale = localTM.Scaling;
babylonAbstractMesh.position = new[] { meshTrans.X, meshTrans.Y, meshTrans.Z };
var rotationQuaternion = new BabylonQuaternion {
X = meshRotation.X, Y = meshRotation.Y, Z = meshRotation.Z, W = -meshRotation.W
};
if (ExportQuaternionsInsteadOfEulers)
{
babylonAbstractMesh.rotationQuaternion = rotationQuaternion.ToArray();
}
else
{
babylonAbstractMesh.rotation = rotationQuaternion.toEulerAngles().ToArray();
}
babylonAbstractMesh.scaling = new[] { meshScale.X, meshScale.Y, meshScale.Z };
}
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) ||
(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 });
});
}
}
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.GetObjectTM(0);
if (maxGameNode.NodeParent != null)
{
var parentWorld = maxGameNode.NodeParent.GetObjectTM(0);
localTM.MultiplyBy(parentWorld.Inverse);
}
var meshTrans = localTM.Translation;
var meshRotation = localTM.Rotation;
var meshScale = localTM.Scaling;
babylonAbstractMesh.position = new[] { meshTrans.X, meshTrans.Y, meshTrans.Z };
var rotationQuaternion = new BabylonQuaternion {
X = meshRotation.X, Y = meshRotation.Y, Z = meshRotation.Z, W = -meshRotation.W
};
if (ExportQuaternionsInsteadOfEulers)
{
babylonAbstractMesh.rotationQuaternion = rotationQuaternion.ToArray();
}
else
{
babylonAbstractMesh.rotation = rotationQuaternion.toEulerAngles().ToArray();
}
babylonAbstractMesh.scaling = new[] { meshScale.X, meshScale.Y, meshScale.Z };
}
private float[] FixChildQuaternion(float[] q, double angle)
{
BabylonQuaternion qFix = new BabylonQuaternion((float)Math.Sin(angle / 2), 0, 0, (float)Math.Cos(angle / 2));
BabylonQuaternion quaternion = new BabylonQuaternion(q[0], q[1], q[2], q[3]);
BabylonQuaternion rotationQuaternion = qFix.MultiplyWith(quaternion);
return(rotationQuaternion.ToArray());
}
private BabylonQuaternion FixChildQuaternion(BabylonNode node, double angle)
{
BabylonQuaternion qFix = new BabylonQuaternion((float)Math.Sin(angle / 2), 0, 0, (float)Math.Cos(angle / 2));
BabylonQuaternion quaternion = new BabylonQuaternion(node.rotationQuaternion[0], node.rotationQuaternion[1], node.rotationQuaternion[2], node.rotationQuaternion[3]);
BabylonQuaternion rotationQuaternion = qFix.MultiplyWith(quaternion);
return(rotationQuaternion);
}
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);
}
static float dQuat2(BabylonQuaternion q1, BabylonQuaternion q2)
{
float dX = q2.X - q1.X;
float dY = q2.Y - q1.Y;
float dZ = q2.Z - q1.Z;
float dW = q2.W - q1.W;
return(dX * dX + dY * dY + dZ * dZ + dW * dW);
}
/// <summary>
/// Default space is transform
/// Default rotation order is YXZ
/// </summary>
/// <param name="mTransformationMatrix"></param>
/// <returns></returns>
public static float[] getRotation(this MTransformationMatrix mTransformationMatrix)
{
double x = 0, y = 0, z = 0, w = 0;
mTransformationMatrix.getRotationQuaternion(ref x, ref y, ref z, ref w);
// Maya conversion algorithm is bugged when reaching limits (angle like (-90,89,90))
// Convert quaternion to vector3 using Babylon conversion algorithm
BabylonQuaternion babylonQuaternion = new BabylonQuaternion((float)x, (float)y, (float)z, (float)w);
return(babylonQuaternion.toEulerAngles().ToArray());
}
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)
{
logger.RaiseMessage("GLTFExporter.Mesh | Export mesh named: " + babylonMesh.name, 1);
// --------------------------
// --- Mesh from babylon ----
// --------------------------
// get direct access to mesh data or use geometryId to do so
IBabylonMeshData meshData = babylonMesh.geometryId == null ? babylonMesh : (IBabylonMeshData)babylonScene.geometries.Get(babylonMesh.geometryId) ?? babylonMesh;
if (meshData.positions == null || meshData.positions.Length == 0)
{
logger.RaiseMessage("GLTFExporter.Mesh | Mesh is a dummy", 2);
return(null);
}
logger.RaiseMessage("GLTFExporter.Mesh | Mesh from babylon", 2);
// Retreive general data from babylon mesh
int nbVertices = meshData.positions.Length / 3;
bool hasUV = meshData.uvs != null && meshData.uvs.Length > 0;
bool hasUV2 = meshData.uvs2 != null && meshData.uvs2.Length > 0;
bool hasColor = meshData.colors != null && meshData.colors.Length > 0;
bool hasBones = meshData.matricesIndices != null && meshData.matricesIndices.Length > 0;
bool hasTangents = meshData.tangents != null && meshData.tangents.Length > 0;
bool hasNormals = meshData.normals != null && meshData.normals.Length > 0;
bool hasBonesExtra = babylonMesh.matricesIndicesExtra != null && babylonMesh.matricesIndicesExtra.Length > 0;
bool hasMetadata = babylonMesh.metadata != null && babylonMesh.metadata.Count > 0;
logger.RaiseMessage("GLTFExporter.Mesh | nbVertices=" + nbVertices, 3);
logger.RaiseMessage("GLTFExporter.Mesh | hasUV=" + hasUV, 3);
logger.RaiseMessage("GLTFExporter.Mesh | hasUV2=" + hasUV2, 3);
logger.RaiseMessage("GLTFExporter.Mesh | hasColor=" + hasColor, 3);
logger.RaiseMessage("GLTFExporter.Mesh | hasBones=" + hasBones, 3);
logger.RaiseMessage("GLTFExporter.Mesh | hasBonesExtra=" + hasBonesExtra, 3);
logger.RaiseMessage("GLTFExporter.Mesh | hasMetadata=" + hasMetadata, 3);
logger.RaiseMessage("GLTFExporter.Mesh | hasNormals=" + hasNormals, 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(meshData.positions, indexVertex);
// Switch coordinate system at object level
globalVertex.Position.Z *= -1;
globalVertex.Position *= exportParameters.scaleFactor;
if (hasNormals)
{
globalVertex.Normal = BabylonVector3.FromArray(meshData.normals, indexVertex);
globalVertex.Normal.Z *= -1;
}
if (hasTangents)
{
globalVertex.Tangent = BabylonQuaternion.FromArray(meshData.tangents, indexVertex);
// Switch coordinate system at object level
globalVertex.Tangent.Z *= -1;
// Invert W to switch to right handed system
globalVertex.Tangent.W *= -1;
}
if (hasUV)
{
globalVertex.UV = BabylonVector2.FromArray(meshData.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(meshData.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 = ArrayExtension.SubArrayFromEntity(meshData.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
ushort[] unpackBabylonBonesToArray(uint babylonBoneIndices)
{
uint bone3 = babylonBoneIndices >> 24;
uint bone2 = (babylonBoneIndices << 8) >> 24;
uint bone1 = (babylonBoneIndices << 16) >> 24;
uint bone0 = (babylonBoneIndices << 24) >> 24;
babylonBoneIndices -= bone0 << 0;
return(new ushort[] { (ushort)bone0, (ushort)bone1, (ushort)bone2, (ushort)bone3 });
}
uint bonesIndicesMerged = (uint)meshData.matricesIndices[indexVertex];
globalVertex.BonesIndices = unpackBabylonBonesToArray(bonesIndicesMerged);
globalVertex.BonesWeights = ArrayExtension.SubArrayFromEntity(meshData.matricesWeights, indexVertex, 4);
void clearBoneUnusedIndices(ushort[] indices, float[] weights)
{
for (int i = 0; i < indices.Length; ++i)
{
// Zero out indices of unused joint weights to avoid ACCESSOR_JOINTS_USED_ZERO_WEIGHT.
if (MathUtilities.IsAlmostEqualTo(weights[i], 0, float.Epsilon))
{
indices[i] = 0;
}
}
}
clearBoneUnusedIndices(globalVertex.BonesIndices, globalVertex.BonesWeights);
if (hasBonesExtra)
{
uint bonesIndicesExtraMerged = (uint)meshData.matricesIndicesExtra[indexVertex];
globalVertex.BonesIndicesExtra = unpackBabylonBonesToArray(bonesIndicesExtraMerged);
globalVertex.BonesWeightsExtra = ArrayExtension.SubArrayFromEntity(meshData.matricesWeightsExtra, indexVertex, 4);
clearBoneUnusedIndices(globalVertex.BonesIndicesExtra, globalVertex.BonesWeightsExtra);
}
}
globalVertices.Add(globalVertex);
}
var babylonMorphTargetManager = GetBabylonMorphTargetManager(babylonScene, babylonMesh);
// Retreive indices from babylon mesh
List <int> babylonIndices = meshData.indices.ToList();
// --------------------------
// ------- Init glTF --------
// --------------------------
logger.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 -----
// --------------------------
logger.RaiseMessage("GLTFExporter.Mesh | glTF primitives", 2);
List <GLTFMeshPrimitive> meshPrimitives = new List <GLTFMeshPrimitive>();
if (meshData != babylonMesh && primitivesCache.TryGetValue(babylonMesh.geometryId, out List <GLTFMeshPrimitive> result))
{
// this is a clone, indexing the same geometry
// so we just need to retreive the primitive object and copy attributes and indices
meshPrimitives.AddRange(result.Select((p, i) =>
{
var meshPrimitive = new GLTFMeshPrimitive()
{
indices = p.indices,
attributes = p.attributes
};
// Material
if (babylonMesh.materialId != null)
{
logger.RaiseMessage("GLTFExporter.Mesh | Material", 3);
// according we have a clone, then submeshes are of the same count and order.
SetBabylonMaterial(babylonMesh, babylonMesh.subMeshes[i], meshPrimitive);
}
return(meshPrimitive);
}));
}
else
{
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
if (minIndiceValue != 0)
{
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)
{
logger.RaiseMessage("GLTFExporter.Mesh | Material", 3);
SetBabylonMaterial(babylonMesh, babylonSubMesh, meshPrimitive);
}
// --------------------------
// ------- Accessors --------
// --------------------------
logger.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;
// --- 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;
}
// --- Normals ---
if (hasNormals)
{
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;
}
// --- 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)
{
logger.RaiseMessage("GLTFExporter.Mesh | Bones", 3);
// if we've already exported this mesh's skeleton, check if the skins match,
// if so then export this mesh primitive to share joint and weight accessors.
var matchingSkinnedMesh = alreadyExportedSkinnedMeshes.FirstOrDefault(skinnedMesh => skinnedMesh.skeletonId == babylonMesh.skeletonId);
if (matchingSkinnedMesh != null && BabylonMesh.MeshesShareSkin(matchingSkinnedMesh, babylonMesh))
{
var tmpGltfMesh = gltf.MeshesList.FirstOrDefault(mesh => matchingSkinnedMesh.name == mesh.name);
var tmpGltfMeshPrimitive = tmpGltfMesh.primitives.First();
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.JOINTS_0.ToString(), tmpGltfMeshPrimitive.attributes[GLTFMeshPrimitive.Attribute.JOINTS_0.ToString()]);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.WEIGHTS_0.ToString(), tmpGltfMeshPrimitive.attributes[GLTFMeshPrimitive.Attribute.WEIGHTS_0.ToString()]);
if (hasBonesExtra)
{
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.JOINTS_1.ToString(), tmpGltfMeshPrimitive.attributes[GLTFMeshPrimitive.Attribute.JOINTS_1.ToString()]);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.WEIGHTS_1.ToString(), tmpGltfMeshPrimitive.attributes[GLTFMeshPrimitive.Attribute.WEIGHTS_1.ToString()]);
}
sharedSkinnedMeshesByOriginal[tmpGltfMesh].Add(gltfMesh);
}
else
{
// Create new joint and weight accessors for this mesh's skinning.
// --- Joints ---
sharedSkinnedMeshesByOriginal[gltfMesh] = new List <GLTFMesh>();
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;
if (hasBonesExtra)
{
// --- Joints Extra ---
var accessorJointsExtra = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewUnsignedShortVec4(gltf, buffer),
"accessorJointsExtra",
GLTFAccessor.ComponentType.UNSIGNED_SHORT,
GLTFAccessor.TypeEnum.VEC4
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.JOINTS_1.ToString(), accessorJointsExtra.index);
// Populate accessor
List <ushort> jointsExtra = globalVerticesSubMesh.SelectMany(v => new[] { v.BonesIndicesExtra[0], v.BonesIndicesExtra[1], v.BonesIndicesExtra[2], v.BonesIndicesExtra[3] }).ToList();
jointsExtra.ForEach(n => accessorJointsExtra.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorJointsExtra.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)
{
// --- Weights Extra ---
var accessorWeightsExtra = GLTFBufferService.Instance.CreateAccessor(
gltf,
GLTFBufferService.Instance.GetBufferViewFloatVec4(gltf, buffer),
"accessorWeightsExtra",
GLTFAccessor.ComponentType.FLOAT,
GLTFAccessor.TypeEnum.VEC4
);
meshPrimitive.attributes.Add(GLTFMeshPrimitive.Attribute.WEIGHTS_1.ToString(), accessorWeightsExtra.index);
// Populate accessor
List <float> weightBonesExtra = globalVerticesSubMesh.SelectMany(v => new[] { v.BonesWeightsExtra[0], v.BonesWeightsExtra[1], v.BonesWeightsExtra[2], v.BonesWeightsExtra[3] }).ToList();
weightBonesExtra.ForEach(n => accessorWeightsExtra.bytesList.AddRange(BitConverter.GetBytes(n)));
accessorWeightsExtra.count = globalVerticesSubMesh.Count;
}
}
}
// Morph targets positions and normals
if (babylonMorphTargetManager != null)
{
logger.RaiseMessage("GLTFExporter.Mesh | Morph targets", 3);
_exportMorphTargets(babylonMesh, babylonSubMesh, babylonMorphTargetManager, gltf, buffer, meshPrimitive);
}
}
// this is a "master" mesh so save the primitives into dictionary
if (babylonMesh.geometryId != null && meshPrimitives != null)
{
primitivesCache.Add(babylonMesh.geometryId, meshPrimitives);
}
}
gltfMesh.primitives = meshPrimitives.ToArray();
// Morph targets weights and names
if (babylonMorphTargetManager != null && babylonMorphTargetManager.targets != null)
{
var weights = new List <float>();
var targetNames = new List <String>();
foreach (BabylonMorphTarget babylonMorphTarget in babylonMorphTargetManager.targets)
{
weights.Add(babylonMorphTarget.influence);
targetNames.Add(babylonMorphTarget.name);
}
gltfMesh.weights = weights.ToArray();
if (gltfMesh.extras == null)
{
gltfMesh.extras = new Dictionary <string, object>();
}
gltfMesh.extras["targetNames"] = targetNames.ToArray();
}
if (hasBones)
{
alreadyExportedSkinnedMeshes.Add(babylonMesh);
}
ExportGLTFExtension(babylonMesh, ref gltfMesh, gltf);
return(gltfMesh);
}
private GLTFSkin ExportSkin(BabylonSkeleton babylonSkeleton, GLTF gltf, GLTFNode gltfNode, GLTFMesh gltfMesh)
{
logger.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 *= exportParameters.scaleFactor;
translationBabylon.Z *= -1;
rotationQuatBabylon.X *= -1;
rotationQuatBabylon.Y *= -1;
boneLocalMatrix = BabylonMatrix.Compose(scale, rotationQuatBabylon, translationBabylon);
babylonBone.matrix = boneLocalMatrix.m;
}
}
var babylonSkeletonExportData = alreadyExportedSkeletons[babylonSkeleton];
// Skin
// if this mesh is sharing a skin with another mesh, use the already exported skin
var sharedSkinnedMeshesByOriginalPair = sharedSkinnedMeshesByOriginal.Where(skinSharingMeshPair => skinSharingMeshPair.Value.Contains(gltfMesh)).Select(kvp => (KeyValuePair <GLTFMesh, List <GLTFMesh> >?)kvp).FirstOrDefault();
if (sharedSkinnedMeshesByOriginalPair != null)
{
logger.RaiseMessage("GLTFExporter.Skin | Sharing skinning information from mesh '" + sharedSkinnedMeshesByOriginalPair.Value.Key.name + "'", 3);
var skeletonExportData = alreadyExportedSkeletons[babylonSkeleton];
gltfNode.skin = skeletonExportData.skinIndex;
return(gltf.SkinsList[(int)gltfNode.skin]);
}
// otherwise create a new GLTFSkin
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++;
babylonSkeletonExportData.skinIndex = gltfSkin.index;
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))
{
var nodePair = nodeToGltfNodeMap.First(pair => pair.Key.id.Equals(babylonBone.id));
BabylonMatrix boneWorldMatrix = _getNodeWorldMatrix(nodePair.Value);
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 = nodeToGltfNodeMap.FirstOrDefault(pair => pair.Key.id.Equals(babylonBone.id)).Value;//_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();
ExportGLTFExtension(babylonSkeleton, ref gltfNode, gltf);
return(gltfSkin);
}
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 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 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);
}
/// <summary>
/// In 3DS Max default element can look in different direction than the same default element in Babylon or in glTF.
/// This function correct the node rotation.
/// </summary>
/// <param name="node"></param>
/// <param name="babylonScene"></param>
/// <param name="angle"></param>
private void FixNodeRotation(ref BabylonNode node, ref BabylonScene babylonScene, double angle)
{
string id = node.id;
IList <BabylonMesh> meshes = babylonScene.MeshesList.FindAll(mesh => mesh.parentId == null ? false : mesh.parentId.Equals(id));
RaiseMessage($"{node.name}", 2);
// fix the vue
// Rotation around the axis X of PI / 2 in the indirect direction for camera
// double angle = Math.PI / 2; // for camera
// double angle = -Math.PI / 2; // for light
if (node.rotation != null)
{
node.rotation[0] += (float)angle;
}
if (node.rotationQuaternion != null)
{
BabylonQuaternion rotationQuaternion = FixCameraQuaternion(node, angle);
node.rotationQuaternion = rotationQuaternion.ToArray();
node.rotation = rotationQuaternion.toEulerAngles().ToArray();
}
// animation
List <BabylonAnimation> animations = new List <BabylonAnimation>(node.animations);
BabylonAnimation animationRotationQuaternion = animations.Find(animation => animation.property.Equals("rotationQuaternion"));
if (animationRotationQuaternion != null)
{
foreach (BabylonAnimationKey key in animationRotationQuaternion.keys)
{
key.values = FixCameraQuaternion(key.values, angle);
}
}
else // if the camera has a lockedTargetId, it is the extraAnimations that stores the rotation animation
{
if (node.extraAnimations != null)
{
List <BabylonAnimation> extraAnimations = new List <BabylonAnimation>(node.extraAnimations);
animationRotationQuaternion = extraAnimations.Find(animation => animation.property.Equals("rotationQuaternion"));
if (animationRotationQuaternion != null)
{
foreach (BabylonAnimationKey key in animationRotationQuaternion.keys)
{
key.values = FixCameraQuaternion(key.values, angle);
}
}
}
}
// fix direct children
// Rotation around the axis X of -PI / 2 in the direct direction for camera children
angle = -angle;
foreach (var mesh in meshes)
{
RaiseVerbose($"{mesh.name}", 3);
mesh.position = new float[] { mesh.position[0], mesh.position[2], -mesh.position[1] };
// Add a rotation of PI/2 axis X in direct direction
if (mesh.rotationQuaternion != null)
{
// Rotation around the axis X of -PI / 2 in the direct direction
BabylonQuaternion quaternion = FixChildQuaternion(mesh, angle);
mesh.rotationQuaternion = quaternion.ToArray();
}
if (mesh.rotation != null)
{
mesh.rotation[0] += (float)angle;
}
// Animations
animations = new List <BabylonAnimation>(mesh.animations);
// Position
BabylonAnimation animationPosition = animations.Find(animation => animation.property.Equals("position"));
if (animationPosition != null)
{
foreach (BabylonAnimationKey key in animationPosition.keys)
{
key.values = new float[] { key.values[0], key.values[2], -key.values[1] };
}
}
// Rotation
animationRotationQuaternion = animations.Find(animation => animation.property.Equals("rotationQuaternion"));
if (animationRotationQuaternion != null)
{
foreach (BabylonAnimationKey key in animationRotationQuaternion.keys)
{
key.values = FixChildQuaternion(key.values, angle);
}
}
}
}
/// <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);
}
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);
}
}
}
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 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 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);
}
