I have a vertex format which currently only specifies the vertex Position and the Texture Coordinates. The structure is as follows:
[StructLayout(LayoutKind.Sequential)]
struct TestVertex
{
public Vector4 Position;
public Vector2 TextureCoords;
public static VertexFormat Format
{
get
{
return VertexFormat.Position | VertexFormat.Texture1;
}
}
public static int SizeInBytes
{
get
{
return Marshal.SizeOf(typeof(TestVertex));
}
}
}
I need to be able to transform the vertices, so I'm used Position instead of PositionRhw.
However, when I try to render a square using this format, I just get a black square with no texture. If I change Position to PositionRhw, I get the texture showing properly, but don't get the transformation applied.
Can anyone see what I'm doing wrong? Here is some of the other code if it helps:
Initialising the rectangle:
this.vertices = new VertexBuffer(device, 4 * TestVertex.SizeInBytes, Usage.WriteOnly, TestVertex.Format, Pool.Default);
DataStream stream = vertices.Lock(0, 0, LockFlags.None);
TestVertex[] vertexData = new TestVertex[4];
vertexData[0].Position = new Vector4(0F, 256F, 1F, 1F);
vertexData[0].TextureCoords = new Vector2(0F, 1F);
vertexData[1].Position = new Vector4(0F, 0F, 1F, 1F);
vertexData[1].TextureCoords = new Vector2(0F, 0F);
vertexData[2].Position = new Vector4(256F, 0F, 1F, 1F);
vertexData[2].TextureCoords = new Vector2(1F, 0F);
vertexData[3].Position = new Vector4(256F, 256F, 1F, 1F);
vertexData[3].TextureCoords = new Vector2(1F, 1F);
stream.WriteRange(vertexData);
vertices.Unlock();
Rendering the rectangle:
this.device.SetTexture(0, texture);
this.device.SetStreamSource(0, vertices, 0, TestVertex.SizeInBytes);
this.device.VertexFormat = TestVertex.Format;
this.device.DrawPrimitives(PrimitiveType.TriangleFan, 0, 2);
