public static D3D11Mesh CreateTriangle()
{
var model = new D3D11Mesh();
var positions = new Vector3[] {
new Vector3(0.0f, 0.0f, 0.0f),
new Vector3(0.5f, 0.5f, 0.0f),
new Vector3(0.5f, -0.5f, 0.0f),
};
var positionSpan = MemoryMarshal.Cast <Vector3, byte>(positions.AsSpan());
model.SetVertexAttribute(Semantics.POSITION,
positionSpan.ToArray().AsMemory(),
Marshal.SizeOf(positions[0].GetType()));
var colors = new Vector4[] {
new Vector4(1.0f, 0.0f, 0.0f, 1.0f),
new Vector4(0.0f, 1.0f, 0.0f, 1.0f),
new Vector4(0.0f, 0.0f, 1.0f, 1.0f),
};
var colorSpan = MemoryMarshal.Cast <Vector4, byte>(colors.AsSpan());
model.SetVertexAttribute(Semantics.COLOR,
colorSpan.ToArray().AsMemory(),
Marshal.SizeOf(colors[0].GetType()));
Span <int> indices = stackalloc int[]
{
0,
1,
2
};
var indexSpan = MemoryMarshal.Cast <int, byte>(indices);
model.SetIndices(indexSpan.ToArray(), 4);
return(model);
}
}
