public static IndexBufferBinding ConvertIndexBufferBinding(SharpGLTF.Schema2.MeshPrimitive mesh, GraphicsDevice device)
{
var indices = mesh.GetTriangleIndices().Select(x => new int[] { x.A, x.C, x.B }).SelectMany(x => x).Select(x => (uint)x).ToArray();
var buf = Stride.Graphics.Buffer.Index.New(device, indices);
return(new IndexBufferBinding(buf, true, indices.Length));
}
public static Mesh LoadMesh(SharpGLTF.Schema2.MeshPrimitive mesh, GraphicsDevice device)
{
var draw = new MeshDraw
{
PrimitiveType = ConvertPrimitiveType(mesh.DrawPrimitiveType),
IndexBuffer = ConvertIndexBufferBinding(mesh, device),
VertexBuffers = ConvertVertexBufferBinding(mesh, device),
DrawCount = GetDrawCount(mesh)
};
var result = new Mesh(draw, new ParameterCollection())
{
Skinning = ConvertInverseBindMatrices(mesh.LogicalParent.LogicalParent),
Name = mesh.LogicalParent.Name,
MaterialIndex = mesh.LogicalParent.LogicalParent.LogicalMaterials.ToList().IndexOf(mesh.Material)
};
//TODO : Add parameter collection only after checking if it has
result.Parameters.Set(MaterialKeys.HasSkinningPosition, true);
result.Parameters.Set(MaterialKeys.HasSkinningNormal, true);
return(result);
}
public static VertexBufferBinding[] ConvertVertexBufferBinding(SharpGLTF.Schema2.MeshPrimitive mesh, GraphicsDevice device)
{
var offset = 0;
var vertElem =
mesh.VertexAccessors
.Select(
x =>
{
var y = ConvertVertexElement(x, offset);
offset += y.Item2;
return(y.Item1);
})
.ToList();
var declaration =
new VertexDeclaration(
vertElem.ToArray()
);
var size = mesh.VertexAccessors.First().Value.Count;
var byteBuffer = Enumerable.Range(0, size)
.Select(
x =>
declaration.EnumerateWithOffsets()
.Select(y => y.VertexElement.SemanticName
.Replace("ORD", "ORD_" + y.VertexElement.SemanticIndex)
.Replace("BLENDINDICES", "JOINTS_0")
.Replace("BLENDWEIGHT", "WEIGHTS_0")
)
.Select(y => mesh.GetVertexAccessor(y).TryGetVertexBytes(x).ToArray())
)
.SelectMany(x => x)
.SelectMany(x => x)
.ToArray();
var buffer =
Stride.Graphics.Buffer.Vertex.New(
device,
new DataPointer(
GCHandle.Alloc(byteBuffer, GCHandleType.Pinned).AddrOfPinnedObject(),
byteBuffer.Length
)
);
var binding = new VertexBufferBinding(buffer, declaration, size);
return(new List <VertexBufferBinding>()
{
binding
}.ToArray());
}
internal _MeshPrimitiveDecoder(SCHEMA2PRIMITIVE srcPrim)
: base(srcPrim)
{
_Material = srcPrim.Material as TMaterial;
}
private static int GetDrawCount(SharpGLTF.Schema2.MeshPrimitive mesh)
{
var tmp = mesh.GetTriangleIndices().Select(x => new int[] { x.A, x.C, x.B }).SelectMany(x => x).Select(x => (uint)x).ToArray();
return(mesh.GetTriangleIndices().Select(x => new int[] { x.A, x.C, x.B }).SelectMany(x => x).Select(x => (uint)x).ToArray().Length);
}
