// a mesh *might* decode to multiple prims if there are submeshes
private MeshPrimitive[] ExportPrimitive(GameObject gameObject)
{
var filter = gameObject.GetComponent <MeshFilter>();
var meshObj = filter.sharedMesh;
var renderer = gameObject.GetComponent <MeshRenderer>();
var materialsObj = renderer.sharedMaterials;
var prims = new MeshPrimitive[meshObj.subMeshCount];
// don't export any more accessors if this mesh is already exported
MeshPrimitive[] primVariations;
if (_meshToPrims.TryGetValue(meshObj, out primVariations) &&
meshObj.subMeshCount == primVariations.Length)
{
for (var i = 0; i < primVariations.Length; i++)
{
prims[i] = new MeshPrimitive(primVariations[i], _root)
{
Material = ExportMaterial(materialsObj[i])
};
}
return(prims);
}
AccessorId aPosition = null, aNormal = null, aTangent = null,
aTexcoord0 = null, aTexcoord1 = null, aColor0 = null;
aPosition = ExportAccessor(SchemaExtensions.ConvertVector3CoordinateSpaceAndCopy(meshObj.vertices, SchemaExtensions.CoordinateSpaceConversionScale));
if (meshObj.normals.Length != 0)
{
aNormal = ExportAccessor(SchemaExtensions.ConvertVector3CoordinateSpaceAndCopy(meshObj.normals, SchemaExtensions.CoordinateSpaceConversionScale));
}
if (meshObj.tangents.Length != 0)
{
aTangent = ExportAccessor(SchemaExtensions.ConvertVector4CoordinateSpaceAndCopy(meshObj.tangents, SchemaExtensions.TangentSpaceConversionScale));
}
if (meshObj.uv.Length != 0)
{
aTexcoord0 = ExportAccessor(SchemaExtensions.FlipTexCoordArrayVAndCopy(meshObj.uv));
}
if (meshObj.uv2.Length != 0)
{
aTexcoord1 = ExportAccessor(SchemaExtensions.FlipTexCoordArrayVAndCopy(meshObj.uv2));
}
if (meshObj.colors.Length != 0)
{
aColor0 = ExportAccessor(meshObj.colors);
}
MaterialId lastMaterialId = null;
for (var submesh = 0; submesh < meshObj.subMeshCount; submesh++)
{
var primitive = new MeshPrimitive();
var triangles = meshObj.GetTriangles(submesh);
primitive.Indices = ExportAccessor(SchemaExtensions.FlipFacesAndCopy(triangles), true);
primitive.Attributes = new Dictionary <string, AccessorId>();
primitive.Attributes.Add(SemanticProperties.POSITION, aPosition);
if (aNormal != null)
{
primitive.Attributes.Add(SemanticProperties.NORMAL, aNormal);
}
if (aTangent != null)
{
primitive.Attributes.Add(SemanticProperties.TANGENT, aTangent);
}
if (aTexcoord0 != null)
{
primitive.Attributes.Add(SemanticProperties.TexCoord(0), aTexcoord0);
}
if (aTexcoord1 != null)
{
primitive.Attributes.Add(SemanticProperties.TexCoord(1), aTexcoord1);
}
if (aColor0 != null)
{
primitive.Attributes.Add(SemanticProperties.Color(0), aColor0);
}
if (submesh < materialsObj.Length)
{
primitive.Material = ExportMaterial(materialsObj[submesh]);
lastMaterialId = primitive.Material;
}
else
{
primitive.Material = lastMaterialId;
}
prims[submesh] = primitive;
}
_meshToPrims[meshObj] = prims;
return(prims);
}
protected virtual GameObject CreateMeshPrimitive(MeshPrimitive primitive, int meshID, int primitiveIndex)
{
var primitiveObj = new GameObject("Primitive");
var meshFilter = primitiveObj.AddComponent <MeshFilter>();
if (_assetCache.MeshCache[meshID][primitiveIndex] == null)
{
_assetCache.MeshCache[meshID][primitiveIndex] = new MeshCacheData();
}
if (_assetCache.MeshCache[meshID][primitiveIndex].LoadedMesh == null)
{
if (_assetCache.MeshCache[meshID][primitiveIndex].MeshAttributes.Count == 0)
{
BuildMeshAttributes(primitive, meshID, primitiveIndex);
}
var meshAttributes = _assetCache.MeshCache[meshID][primitiveIndex].MeshAttributes;
var vertexCount = primitive.Attributes[SemanticProperties.POSITION].Value.Count;
// todo optimize: There are multiple copies being performed to turn the buffer data into mesh data. Look into reducing them
UnityEngine.Mesh mesh = new UnityEngine.Mesh
{
vertices = primitive.Attributes.ContainsKey(SemanticProperties.POSITION)
? meshAttributes[SemanticProperties.POSITION].AccessorContent.AsVertices.ToUnityVector3Raw()
: null,
normals = primitive.Attributes.ContainsKey(SemanticProperties.NORMAL)
? meshAttributes[SemanticProperties.NORMAL].AccessorContent.AsNormals.ToUnityVector3Raw()
: null,
uv = primitive.Attributes.ContainsKey(SemanticProperties.TexCoord(0))
? meshAttributes[SemanticProperties.TexCoord(0)].AccessorContent.AsTexcoords.ToUnityVector2Raw()
: null,
uv2 = primitive.Attributes.ContainsKey(SemanticProperties.TexCoord(1))
? meshAttributes[SemanticProperties.TexCoord(1)].AccessorContent.AsTexcoords.ToUnityVector2Raw()
: null,
uv3 = primitive.Attributes.ContainsKey(SemanticProperties.TexCoord(2))
? meshAttributes[SemanticProperties.TexCoord(2)].AccessorContent.AsTexcoords.ToUnityVector2Raw()
: null,
uv4 = primitive.Attributes.ContainsKey(SemanticProperties.TexCoord(3))
? meshAttributes[SemanticProperties.TexCoord(3)].AccessorContent.AsTexcoords.ToUnityVector2Raw()
: null,
colors = primitive.Attributes.ContainsKey(SemanticProperties.Color(0))
? meshAttributes[SemanticProperties.Color(0)].AccessorContent.AsColors.ToUnityColorRaw()
: null,
triangles = primitive.Indices != null
? meshAttributes[SemanticProperties.INDICES].AccessorContent.AsTriangles.ToIntArrayRaw()
: MeshPrimitive.GenerateTriangles(vertexCount),
tangents = primitive.Attributes.ContainsKey(SemanticProperties.TANGENT)
? meshAttributes[SemanticProperties.TANGENT].AccessorContent.AsTangents.ToUnityVector4Raw()
: null
};
_assetCache.MeshCache[meshID][primitiveIndex].LoadedMesh = mesh;
}
meshFilter.sharedMesh = _assetCache.MeshCache[meshID][primitiveIndex].LoadedMesh;
var materialWrapper = CreateMaterial(
primitive.Material != null ? primitive.Material.Value : DefaultMaterial,
primitive.Material != null ? primitive.Material.Id : -1
);
var meshRenderer = primitiveObj.AddComponent <MeshRenderer>();
meshRenderer.material = materialWrapper.GetContents(primitive.Attributes.ContainsKey(SemanticProperties.Color(0)));
if (_addColliders)
{
var meshCollider = primitiveObj.AddComponent <MeshCollider>();
meshCollider.sharedMesh = meshFilter.mesh;
}
return(primitiveObj);
}
protected virtual void BuildMeshAttributes(MeshPrimitive primitive, int meshID, int primitiveIndex)
{
if (_assetCache.MeshCache[meshID][primitiveIndex].MeshAttributes.Count == 0)
{
Dictionary <string, AttributeAccessor> attributeAccessors = new Dictionary <string, AttributeAccessor>(primitive.Attributes.Count + 1);
foreach (var attributePair in primitive.Attributes)
{
AttributeAccessor AttributeAccessor = new AttributeAccessor()
{
AccessorId = attributePair.Value,
Buffer = _assetCache.BufferCache[attributePair.Value.Value.BufferView.Value.Buffer.Id]
};
attributeAccessors[attributePair.Key] = AttributeAccessor;
}
if (primitive.Indices != null)
{
AttributeAccessor indexBuilder = new AttributeAccessor()
{
AccessorId = primitive.Indices,
Buffer = _assetCache.BufferCache[primitive.Indices.Value.BufferView.Value.Buffer.Id]
};
attributeAccessors[SemanticProperties.INDICES] = indexBuilder;
}
GLTFHelpers.BuildMeshAttributes(ref attributeAccessors);
// Flip vectors and triangles to the Unity coordinate system.
if (attributeAccessors.ContainsKey(SemanticProperties.POSITION))
{
NumericArray resultArray = attributeAccessors[SemanticProperties.POSITION].AccessorContent;
resultArray.AsVertices = GLTFUnityHelpers.FlipVectorArrayHandedness(resultArray.AsVertices);
attributeAccessors[SemanticProperties.POSITION].AccessorContent = resultArray;
}
if (attributeAccessors.ContainsKey(SemanticProperties.INDICES))
{
NumericArray resultArray = attributeAccessors[SemanticProperties.INDICES].AccessorContent;
resultArray.AsTriangles = GLTFUnityHelpers.FlipFaces(resultArray.AsTriangles);
attributeAccessors[SemanticProperties.INDICES].AccessorContent = resultArray;
}
if (attributeAccessors.ContainsKey(SemanticProperties.NORMAL))
{
NumericArray resultArray = attributeAccessors[SemanticProperties.NORMAL].AccessorContent;
resultArray.AsNormals = GLTFUnityHelpers.FlipVectorArrayHandedness(resultArray.AsNormals);
attributeAccessors[SemanticProperties.NORMAL].AccessorContent = resultArray;
}
// TexCoord goes from 0 to 3 to match GLTFHelpers.BuildMeshAttributes
for (int i = 0; i < 4; i++)
{
if (attributeAccessors.ContainsKey(SemanticProperties.TexCoord(i)))
{
NumericArray resultArray = attributeAccessors[SemanticProperties.TexCoord(i)].AccessorContent;
resultArray.AsTexcoords = GLTFUnityHelpers.FlipTexCoordArrayV(resultArray.AsTexcoords);
attributeAccessors[SemanticProperties.TexCoord(i)].AccessorContent = resultArray;
}
}
if (attributeAccessors.ContainsKey(SemanticProperties.TANGENT))
{
NumericArray resultArray = attributeAccessors[SemanticProperties.TANGENT].AccessorContent;
resultArray.AsTangents = GLTFUnityHelpers.FlipVectorArrayHandedness(resultArray.AsTangents);
attributeAccessors[SemanticProperties.TANGENT].AccessorContent = resultArray;
}
_assetCache.MeshCache[meshID][primitiveIndex].MeshAttributes = attributeAccessors;
}
}
// a mesh *might* decode to multiple prims if there are submeshes
private MeshPrimitive[] ExportPrimitive(UnityEngine.Mesh meshObj, UnityEngine.Material[] materials, Skin skin = null)
{
MyLog.Log("Mesh属性:");
var skinnedMeshRender = this._target.GetComponent <SkinnedMeshRenderer>();
var root = skinnedMeshRender ? this._target.transform : null;
var materialsObj = new List <UnityEngine.Material>(materials);
var prims = new MeshPrimitive[meshObj.subMeshCount];
var byteOffset = _bufferWriter.BaseStream.Position;
var bufferViewId = this._root.WriteBufferView(this._bufferId, 0, (int)(_bufferWriter.BaseStream.Position - byteOffset));
AccessorId aPosition = null, aNormal = null, aTangent = null,
aColor0 = null, aTexcoord0 = null, aTexcoord1 = null,
aBlendIndex = null, aBlendWeight = null;
aPosition = this._root.WriteAccessor(this._bufferId, SchemaExtensions.ConvertVector3CoordinateSpaceAndCopy(meshObj.vertices, SchemaExtensions.CoordinateSpaceConversionScale), bufferViewId, false, null, this._bufferWriter);
MyLog.Log("-------vertices:" + meshObj.vertices.Length);
if (meshObj.normals.Length != 0 && (ExportSetting.instance.mesh.normal))
{
MyLog.Log("-------normals:" + meshObj.normals.Length);
aNormal = this._root.WriteAccessor(this._bufferId, SchemaExtensions.ConvertVector3CoordinateSpaceAndCopy(meshObj.normals, SchemaExtensions.CoordinateSpaceConversionScale), bufferViewId, true, null, this._bufferWriter);
}
if (meshObj.tangents.Length != 0 && (ExportSetting.instance.mesh.tangent))
{
aTangent = this._root.WriteAccessor(this._bufferId, SchemaExtensions.ConvertVector4CoordinateSpaceAndCopy(meshObj.tangents, SchemaExtensions.TangentSpaceConversionScale), bufferViewId, true, this._bufferWriter);
}
if (meshObj.colors.Length != 0 && (ExportSetting.instance.mesh.color))
{
MyLog.Log("-------colors:" + meshObj.colors.Length);
aColor0 = this._root.WriteAccessor(this._bufferId, meshObj.colors, bufferViewId, this._bufferWriter);
}
if (meshObj.uv.Length != 0)
{
MyLog.Log("-------uv:" + meshObj.uv.Length);
aTexcoord0 = this._root.WriteAccessor(this._bufferId, SchemaExtensions.FlipTexCoordArrayVAndCopy(meshObj.uv), bufferViewId, this._bufferWriter);
}
var meshRender = this._target.GetComponent <MeshRenderer>();
if (meshRender != null && meshRender.lightmapIndex >= 0)
{
MyLog.Log("-------uv2:" + meshObj.uv2.Length);
aTexcoord1 = this._root.WriteAccessor(this._bufferId, SchemaExtensions.FlipTexCoordArrayVAndCopy(meshObj.uv2.Length > 0 ? meshObj.uv2 : meshObj.uv), bufferViewId, this._bufferWriter);
// aTexcoord1 = ExportAccessor(ConvertLightMapUVAndCopy(meshObj.uv2.Length > 0 ? meshObj.uv2 : meshObj.uv, meshRender.lightmapScaleOffset), bufferViewId);
}
else
{
if (meshObj.uv2.Length != 0 && (ExportSetting.instance.mesh.uv2))
{
MyLog.Log("-------uv2:" + meshObj.uv2.Length);
aTexcoord1 = this._root.WriteAccessor(this._bufferId, SchemaExtensions.FlipTexCoordArrayVAndCopy(meshObj.uv2), bufferViewId, this._bufferWriter);
}
}
if (meshObj.boneWeights.Length != 0 && (ExportSetting.instance.mesh.bone))
{
MyLog.Log("-------bones:" + meshObj.boneWeights.Length);
aBlendIndex = this._root.WriteAccessor(this._bufferId, SchemaExtensions.ConvertBlendIndexAndCopy(meshObj.boneWeights), null, false, this._bufferWriter);
aBlendWeight = this._root.WriteAccessor(this._bufferId, SchemaExtensions.ConvertBlendWeightAndCopy(meshObj.boneWeights), null, false, this._bufferWriter);
if (skin != null)
{
/*var index = 0;
* var renderer = _target.GetComponent<SkinnedMeshRenderer>();
* var bindposes = new Matrix4x4[renderer.bones.Length];
*
* foreach (var bone in renderer.bones)
* {
* for (var i = 0; i < 16; ++i)
* {
* bindposes[index][i] = bone.worldToLocalMatrix[i];
* }
* index++;
* }
* skin.InverseBindMatrices = ExportAccessor(bindposes);*/
skin.InverseBindMatrices = this._root.WriteAccessor(this._bufferId, meshObj.bindposes, null, this._bufferWriter);
}
}
this._root.BufferViews[bufferViewId.Id].ByteLength = (int)(this._bufferWriter.BaseStream.Position - byteOffset);
MaterialId lastMaterialId = null;
for (var submesh = 0; submesh < meshObj.subMeshCount; submesh++)
{
var primitive = new MeshPrimitive();
var triangles = meshObj.GetTriangles(submesh);
primitive.Indices = this._root.WriteAccessor(this._bufferId, SchemaExtensions.FlipFacesAndCopy(triangles), true, this._bufferWriter);
primitive.Attributes = new Dictionary <string, AccessorId>();
primitive.Attributes.Add(SemanticProperties.POSITION, aPosition);
MyLog.Log("-------triangles:" + triangles.Length + " submesh:" + submesh);
if (aNormal != null)
{
primitive.Attributes.Add(SemanticProperties.NORMAL, aNormal);
}
if (aTangent != null)
{
primitive.Attributes.Add(SemanticProperties.TANGENT, aTangent);
}
if (aColor0 != null)
{
primitive.Attributes.Add(SemanticProperties.Color(0), aColor0);
}
if (aTexcoord0 != null)
{
primitive.Attributes.Add(SemanticProperties.TexCoord(0), aTexcoord0);
}
if (aTexcoord1 != null)
{
primitive.Attributes.Add(SemanticProperties.TexCoord(1), aTexcoord1);
}
if (aBlendIndex != null && aBlendWeight != null)
{
primitive.Attributes.Add(SemanticProperties.Joint(0), aBlendIndex);
primitive.Attributes.Add(SemanticProperties.Weight(0), aBlendWeight);
}
if (submesh < materialsObj.Count)
{
primitive.Material = new MaterialId
{
Id = materialsObj.IndexOf(materialsObj[submesh]),
Root = _root
};
lastMaterialId = primitive.Material;
}
else
{
primitive.Material = lastMaterialId;
}
prims[submesh] = primitive;
}
return(prims);
}
protected virtual void CreateMeshPrimitive(MeshPrimitive primitive, string meshName, int meshID, int primitiveIndex)
{
var meshAttributes = BuildMeshAttributes(primitive, meshID, primitiveIndex);
var vertexCount = primitive.Attributes[SemanticProperties.POSITION].Value.Count;
UnityEngine.Mesh mesh = new UnityEngine.Mesh
{
vertices = primitive.Attributes.ContainsKey(SemanticProperties.POSITION)
? meshAttributes[SemanticProperties.POSITION].AccessorContent.AsVertices.ToUnityVector3()
: null,
normals = primitive.Attributes.ContainsKey(SemanticProperties.NORMAL)
? meshAttributes[SemanticProperties.NORMAL].AccessorContent.AsNormals.ToUnityVector3()
: null,
uv = primitive.Attributes.ContainsKey(SemanticProperties.TexCoord(0))
? meshAttributes[SemanticProperties.TexCoord(0)].AccessorContent.AsTexcoords.ToUnityVector2()
: null,
uv2 = primitive.Attributes.ContainsKey(SemanticProperties.TexCoord(1))
? meshAttributes[SemanticProperties.TexCoord(1)].AccessorContent.AsTexcoords.ToUnityVector2()
: null,
uv3 = primitive.Attributes.ContainsKey(SemanticProperties.TexCoord(2))
? meshAttributes[SemanticProperties.TexCoord(2)].AccessorContent.AsTexcoords.ToUnityVector2()
: null,
uv4 = primitive.Attributes.ContainsKey(SemanticProperties.TexCoord(3))
? meshAttributes[SemanticProperties.TexCoord(3)].AccessorContent.AsTexcoords.ToUnityVector2()
: null,
colors = primitive.Attributes.ContainsKey(SemanticProperties.Color(0))
? meshAttributes[SemanticProperties.Color(0)].AccessorContent.AsColors.ToUnityColor()
: null,
triangles = primitive.Indices != null
? meshAttributes[SemanticProperties.INDICES].AccessorContent.AsTriangles
: MeshPrimitive.GenerateTriangles(vertexCount),
tangents = primitive.Attributes.ContainsKey(SemanticProperties.TANGENT)
? meshAttributes[SemanticProperties.TANGENT].AccessorContent.AsTangents.ToUnityVector4(true)
: null
};
if (primitive.Attributes.ContainsKey(SemanticProperties.JOINT) && primitive.Attributes.ContainsKey(SemanticProperties.WEIGHT))
{
Vector4[] bones = new Vector4[1];
Vector4[] weights = new Vector4[1];
LoadSkinnedMeshAttributes(meshID, primitiveIndex, ref bones, ref weights);
if (bones.Length != mesh.vertices.Length || weights.Length != mesh.vertices.Length)
{
Debug.LogError("Not enough skinning data (bones:" + bones.Length + " weights:" + weights.Length + " verts:" + mesh.vertices.Length + ")");
return;
}
BoneWeight[] bws = new BoneWeight[mesh.vertices.Length];
int maxBonesIndex = 0;
for (int i = 0; i < bws.Length; ++i)
{
// Unity seems expects the the sum of weights to be 1.
float[] normalizedWeights = GLTFUtils.normalizeBoneWeights(weights[i]);
bws[i].boneIndex0 = (int)bones[i].x;
bws[i].weight0 = normalizedWeights[0];
bws[i].boneIndex1 = (int)bones[i].y;
bws[i].weight1 = normalizedWeights[1];
bws[i].boneIndex2 = (int)bones[i].z;
bws[i].weight2 = normalizedWeights[2];
bws[i].boneIndex3 = (int)bones[i].w;
bws[i].weight3 = normalizedWeights[3];
maxBonesIndex = (int)Mathf.Max(maxBonesIndex, bones[i].x, bones[i].y, bones[i].z, bones[i].w);
}
mesh.boneWeights = bws;
// initialize inverseBindMatrix array with identity matrix in order to output a valid mesh object
Matrix4x4[] bindposes = new Matrix4x4[maxBonesIndex];
for (int j = 0; j < maxBonesIndex; ++j)
{
bindposes[j] = Matrix4x4.TRS(Vector3.zero, Quaternion.identity, Vector3.one);
}
mesh.bindposes = bindposes;
}
if (primitive.Targets != null && primitive.Targets.Count > 0)
{
for (int b = 0; b < primitive.Targets.Count; ++b)
{
Vector3[] deltaVertices = new Vector3[primitive.Targets[b]["POSITION"].Value.Count];
Vector3[] deltaNormals = new Vector3[primitive.Targets[b]["POSITION"].Value.Count];
Vector3[] deltaTangents = new Vector3[primitive.Targets[b]["POSITION"].Value.Count];
if (primitive.Targets[b].ContainsKey("POSITION"))
{
NumericArray num = new NumericArray();
deltaVertices = primitive.Targets[b]["POSITION"].Value.AsVector3Array(ref num, _assetCache.BufferCache[0], false).ToUnityVector3(true);
}
if (primitive.Targets[b].ContainsKey("NORMAL"))
{
NumericArray num = new NumericArray();
deltaNormals = primitive.Targets[b]["NORMAL"].Value.AsVector3Array(ref num, _assetCache.BufferCache[0], true).ToUnityVector3(true);
}
//if (primitive.Targets[b].ContainsKey("TANGENT"))
//{
// deltaTangents = primitive.Targets[b]["TANGENT"].Value.AsVector3Array(ref num, _assetCache.BufferCache[0], true).ToUnityVector3(true);
//}
mesh.AddBlendShapeFrame(GLTFUtils.buildBlendShapeName(meshID, b), 1.0f, deltaVertices, deltaNormals, deltaTangents);
}
}
mesh.RecalculateBounds();
mesh.RecalculateTangents();
mesh = _assetManager.saveMesh(mesh, meshName + "_" + meshID + "_" + primitiveIndex);
UnityEngine.Material material = primitive.Material != null && primitive.Material.Id >= 0 ? getMaterial(primitive.Material.Id) : defaultMaterial;
_assetManager.addPrimitiveMeshData(meshID, primitiveIndex, mesh, material);
}
