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.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()
: 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 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 + 1];
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);
}
