public D3D11Mesh ToMesh()
{
var drawable = new D3D11Mesh(_topology, _indices.ToArray());
drawable.SetAttribute(Semantics.POSITION, VertexAttribute.Create(_positions.ToArray()));
drawable.SetAttribute(Semantics.COLOR, VertexAttribute.Create(_colors.ToArray()));
return(drawable);
}
public static VertexAttribute Create <T>(T[] values) where T : struct
{
var size = Marshal.SizeOf <T>();
var va = new VertexAttribute
{
Value = new ArraySegment <byte>(new byte[size * values.Length]),
ElementSize = size,
};
using (var pin = UniGLTF.Pin.Create(values))
{
Marshal.Copy(pin.Ptr, va.Value.Array, va.Value.Offset, va.Value.Count);
}
return(va);
}
public void SetAttribute(Semantics semantics, VertexAttribute attribute)
{
m_attributes[semantics] = attribute;
if (semantics == Semantics.POSITION)
{
VertexCount = attribute.Value.Count / attribute.ElementSize;
_positions = new Vector3[VertexCount];
var pinnedArray = GCHandle.Alloc(_positions, GCHandleType.Pinned);
{
var ptr = pinnedArray.AddrOfPinnedObject();
var positions = attribute.Value;
Marshal.Copy(positions.Array, positions.Offset, ptr, positions.Count);
}
pinnedArray.Free();
}
}
public static D3D11Mesh CreateQuadrangle()
{
var drawable = new D3D11Mesh(SharpDX.Direct3D.PrimitiveTopology.TriangleList,
new int[] { 0, 1, 2, 2, 3, 0 });
drawable.SetAttribute(Semantics.POSITION, VertexAttribute.Create(new Vector3[] {
new Vector3(-1, 1, 0),
new Vector3(1, 1, 0),
new Vector3(1, -1, 0),
new Vector3(-1, -1, 0),
}));
drawable.SetAttribute(Semantics.TEXCOORD, VertexAttribute.Create(new Vector2[] {
new Vector2(0, 0),
new Vector2(1, 0),
new Vector2(1, 1),
new Vector2(0, 1),
}));
return(drawable);
}
