protected virtual GameObject CreateMeshPrimitive(MeshPrimitive primitive)
{
var primitiveObj = new GameObject("Primitive");
var meshFilter = primitiveObj.AddComponent <MeshFilter>();
var vertexCount = primitive.Attributes[SemanticProperties.POSITION].Value.Count;
if (primitive.Contents == null)
{
primitive.Contents = new UnityEngine.Mesh
{
vertices = primitive.Attributes[SemanticProperties.POSITION].Value.AsVertexArray(),
normals = primitive.Attributes.ContainsKey(SemanticProperties.NORMAL)
? primitive.Attributes[SemanticProperties.NORMAL].Value.AsNormalArray()
: null,
uv = primitive.Attributes.ContainsKey(SemanticProperties.TexCoord(0))
? primitive.Attributes[SemanticProperties.TexCoord(0)].Value.AsTexcoordArray()
: null,
uv2 = primitive.Attributes.ContainsKey(SemanticProperties.TexCoord(1))
? primitive.Attributes[SemanticProperties.TexCoord(1)].Value.AsTexcoordArray()
: null,
uv3 = primitive.Attributes.ContainsKey(SemanticProperties.TexCoord(2))
? primitive.Attributes[SemanticProperties.TexCoord(2)].Value.AsTexcoordArray()
: null,
uv4 = primitive.Attributes.ContainsKey(SemanticProperties.TexCoord(3))
? primitive.Attributes[SemanticProperties.TexCoord(3)].Value.AsTexcoordArray()
: null,
colors = primitive.Attributes.ContainsKey(SemanticProperties.Color(0))
? primitive.Attributes[SemanticProperties.Color(0)].Value.AsColorArray()
: null,
triangles = primitive.Indices != null
? primitive.Indices.Value.AsTriangles()
: MeshPrimitive.GenerateTriangles(vertexCount),
tangents = primitive.Attributes.ContainsKey(SemanticProperties.TANGENT)
? primitive.Attributes[SemanticProperties.TANGENT].Value.AsTangentArray()
: null
};
}
meshFilter.sharedMesh = primitive.Contents;
var material = CreateMaterial(
primitive.Material != null ? primitive.Material.Value : DefaultMaterial,
primitive.Attributes.ContainsKey(SemanticProperties.Color(0))
);
var meshRenderer = primitiveObj.AddComponent <MeshRenderer>();
meshRenderer.material = material;
return(primitiveObj);
}
public void BuildMeshAttributes()
{
if (Attributes.ContainsKey(SemanticProperties.POSITION))
{
var accessor = Attributes[SemanticProperties.POSITION].Value;
accessor.AsVertexArray();
}
if (Indices != null)
{
var accessor = Indices.Value;
accessor.AsTriangles();
}
if (Attributes.ContainsKey(SemanticProperties.NORMAL))
{
var accessor = Attributes[SemanticProperties.NORMAL].Value;
accessor.AsNormalArray();
}
if (Attributes.ContainsKey(SemanticProperties.TexCoord(0)))
{
var accessor = Attributes[SemanticProperties.TexCoord(0)].Value;
accessor.AsTexcoordArray();
}
if (Attributes.ContainsKey(SemanticProperties.TexCoord(1)))
{
var accessor = Attributes[SemanticProperties.TexCoord(1)].Value;
accessor.AsTexcoordArray();
}
if (Attributes.ContainsKey(SemanticProperties.TexCoord(2)))
{
var accessor = Attributes[SemanticProperties.TexCoord(2)].Value;
accessor.AsTexcoordArray();
}
if (Attributes.ContainsKey(SemanticProperties.TexCoord(3)))
{
var accessor = Attributes[SemanticProperties.TexCoord(3)].Value;
accessor.AsTexcoordArray();
}
if (Attributes.ContainsKey(SemanticProperties.Color(0)))
{
var accessor = Attributes[SemanticProperties.Color(0)].Value;
accessor.AsColorArray();
}
if (Attributes.ContainsKey(SemanticProperties.TANGENT))
{
var accessor = Attributes[SemanticProperties.TANGENT].Value;
accessor.AsTangentArray();
}
}
/// <summary>
/// Uses the accessor to parse the buffer into attributes needed to construct the mesh primitive
/// </summary>
/// <param name="attributes">A dictionary that contains a mapping of attribute name to data needed to parse</param>
public static void BuildMeshAttributes(ref Dictionary <string, AttributeAccessor> attributes)
{
if (attributes.ContainsKey(SemanticProperties.POSITION))
{
var attributeAccessor = attributes[SemanticProperties.POSITION];
NumericArray resultArray = attributeAccessor.AccessorContent;
int offset = (int)LoadBufferView(attributeAccessor, out byte[] bufferViewCache);
attributeAccessor.AccessorId.Value.AsVertexArray(ref resultArray, bufferViewCache, offset);
attributeAccessor.AccessorContent = resultArray;
}
if (attributes.ContainsKey(SemanticProperties.INDICES))
{
var attributeAccessor = attributes[SemanticProperties.INDICES];
NumericArray resultArray = attributeAccessor.AccessorContent;
int offset = (int)LoadBufferView(attributeAccessor, out byte[] bufferViewCache);
attributeAccessor.AccessorId.Value.AsTriangles(ref resultArray, bufferViewCache, offset);
attributeAccessor.AccessorContent = resultArray;
}
if (attributes.ContainsKey(SemanticProperties.NORMAL))
{
var attributeAccessor = attributes[SemanticProperties.NORMAL];
NumericArray resultArray = attributeAccessor.AccessorContent;
int offset = (int)LoadBufferView(attributeAccessor, out byte[] bufferViewCache);
attributeAccessor.AccessorId.Value.AsNormalArray(ref resultArray, bufferViewCache, offset);
attributeAccessor.AccessorContent = resultArray;
}
if (attributes.ContainsKey(SemanticProperties.TexCoord(0)))
{
var attributeAccessor = attributes[SemanticProperties.TexCoord(0)];
NumericArray resultArray = attributeAccessor.AccessorContent;
int offset = (int)LoadBufferView(attributeAccessor, out byte[] bufferViewCache);
attributeAccessor.AccessorId.Value.AsTexcoordArray(ref resultArray, bufferViewCache, offset);
attributeAccessor.AccessorContent = resultArray;
}
if (attributes.ContainsKey(SemanticProperties.TexCoord(1)))
{
var attributeAccessor = attributes[SemanticProperties.TexCoord(1)];
NumericArray resultArray = attributeAccessor.AccessorContent;
int offset = (int)LoadBufferView(attributeAccessor, out byte[] bufferViewCache);
attributeAccessor.AccessorId.Value.AsTexcoordArray(ref resultArray, bufferViewCache, offset);
attributeAccessor.AccessorContent = resultArray;
}
if (attributes.ContainsKey(SemanticProperties.TexCoord(2)))
{
var attributeAccessor = attributes[SemanticProperties.TexCoord(2)];
NumericArray resultArray = attributeAccessor.AccessorContent;
int offset = (int)LoadBufferView(attributeAccessor, out byte[] bufferViewCache);
attributeAccessor.AccessorId.Value.AsTexcoordArray(ref resultArray, bufferViewCache, offset);
attributeAccessor.AccessorContent = resultArray;
}
if (attributes.ContainsKey(SemanticProperties.TexCoord(3)))
{
var attributeAccessor = attributes[SemanticProperties.TexCoord(3)];
NumericArray resultArray = attributeAccessor.AccessorContent;
int offset = (int)LoadBufferView(attributeAccessor, out byte[] bufferViewCache);
attributeAccessor.AccessorId.Value.AsTexcoordArray(ref resultArray, bufferViewCache, offset);
attributeAccessor.AccessorContent = resultArray;
}
if (attributes.ContainsKey(SemanticProperties.Color(0)))
{
var attributeAccessor = attributes[SemanticProperties.Color(0)];
NumericArray resultArray = attributeAccessor.AccessorContent;
int offset = (int)LoadBufferView(attributeAccessor, out byte[] bufferViewCache);
attributeAccessor.AccessorId.Value.AsColorArray(ref resultArray, bufferViewCache, offset);
attributeAccessor.AccessorContent = resultArray;
}
if (attributes.ContainsKey(SemanticProperties.TANGENT))
{
var attributeAccessor = attributes[SemanticProperties.TANGENT];
NumericArray resultArray = attributeAccessor.AccessorContent;
int offset = (int)LoadBufferView(attributeAccessor, out byte[] bufferViewCache);
attributeAccessor.AccessorId.Value.AsTangentArray(ref resultArray, bufferViewCache, offset);
attributeAccessor.AccessorContent = resultArray;
}
}
public MeshPrimitiveAttributes BuildMeshAttributes(Dictionary <Buffer, byte[]> bufferCache)
{
var attributes = new MeshPrimitiveAttributes();
if (Attributes.ContainsKey(SemanticProperties.POSITION))
{
var accessor = Attributes[SemanticProperties.POSITION].Value;
var bufferData = bufferCache[accessor.BufferView.Value.Buffer.Value];
attributes.Vertices = accessor.AsVector3Array(bufferData);
}
if (Indices != null)
{
var accessor = Indices.Value;
var bufferData = bufferCache[accessor.BufferView.Value.Buffer.Value];
var unflippedTriangles = accessor.AsIntArray(bufferData);
var triangles = new int[unflippedTriangles.Length];
for (int i = 0; i < unflippedTriangles.Length; i += 3)
{
triangles[i + 2] = unflippedTriangles[i];
triangles[i + 1] = unflippedTriangles[i + 1];
triangles[i] = unflippedTriangles[i + 2];
}
attributes.Triangles = triangles;
}
else
{
var triangles = new int[attributes.Vertices.Length];
for (int i = 0; i < triangles.Length; i += 3)
{
triangles[i + 2] = i;
triangles[i + 1] = i + 1;
triangles[i] = i + 2;
}
attributes.Triangles = triangles;
}
if (Attributes.ContainsKey(SemanticProperties.NORMAL))
{
var accessor = Attributes[SemanticProperties.NORMAL].Value;
var bufferData = bufferCache[accessor.BufferView.Value.Buffer.Value];
attributes.Normals = accessor.AsVector3Array(bufferData);
}
if (Attributes.ContainsKey(SemanticProperties.TexCoord(0)))
{
var accessor = Attributes[SemanticProperties.TexCoord(0)].Value;
var bufferData = bufferCache[accessor.BufferView.Value.Buffer.Value];
attributes.Uv = accessor.AsVector2Array(bufferData);
}
if (Attributes.ContainsKey(SemanticProperties.TexCoord(1)))
{
var accessor = Attributes[SemanticProperties.TexCoord(1)].Value;
var bufferData = bufferCache[accessor.BufferView.Value.Buffer.Value];
attributes.Uv2 = accessor.AsVector2Array(bufferData);
}
if (Attributes.ContainsKey(SemanticProperties.TexCoord(2)))
{
var accessor = Attributes[SemanticProperties.TexCoord(2)].Value;
var bufferData = bufferCache[accessor.BufferView.Value.Buffer.Value];
attributes.Uv3 = accessor.AsVector2Array(bufferData);
}
if (Attributes.ContainsKey(SemanticProperties.TexCoord(3)))
{
var accessor = Attributes[SemanticProperties.TexCoord(3)].Value;
var bufferData = bufferCache[accessor.BufferView.Value.Buffer.Value];
attributes.Uv4 = accessor.AsVector2Array(bufferData);
}
if (Attributes.ContainsKey(SemanticProperties.Color(0)))
{
var accessor = Attributes[SemanticProperties.Color(0)].Value;
var bufferData = bufferCache[accessor.BufferView.Value.Buffer.Value];
attributes.Colors = accessor.AsColorArray(bufferData);
}
if (Attributes.ContainsKey(SemanticProperties.TANGENT))
{
var accessor = Attributes[SemanticProperties.TANGENT].Value;
var bufferData = bufferCache[accessor.BufferView.Value.Buffer.Value];
attributes.Tangents = accessor.AsVector4Array(bufferData);
}
return(attributes);
}
// 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] = primVariations[i].Clone();
prims[i].Material = ExportMaterial(materialsObj[i]);
}
return(prims);
}
AccessorId aPosition = null, aNormal = null, aTangent = null,
aTexcoord0 = null, aTexcoord1 = null, aColor0 = null;
aPosition = ExportAccessor(InvertZ(meshObj.vertices));
if (meshObj.normals.Length != 0)
{
aNormal = ExportAccessor(InvertZ(meshObj.normals));
}
if (meshObj.tangents.Length != 0)
{
aTangent = ExportAccessor(InvertW(meshObj.tangents));
}
if (meshObj.uv.Length != 0)
{
aTexcoord0 = ExportAccessor(InvertY(meshObj.uv));
}
if (meshObj.uv2.Length != 0)
{
aTexcoord1 = ExportAccessor(InvertY(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();
primitive.Contents = meshObj;
var triangles = meshObj.GetTriangles(submesh);
primitive.Indices = ExportAccessor(FlipFaces(triangles));
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);
}
