I've just started to mess around with Fixed Function texture blending in C#, but am having some difficulty. There do not seem to be any resources on this with C# code, so I've been converting it from the c++ examples, and am thinking that perhaps something didn't transfer correctly?
I was going by the demo from the GameDev texture splatting tutorial located at www.gamedev.net/reference/articles/article2238.asp
It is supposed to look like:
but instead is turning out to be:
The correct texture colors are there, and the alpha blending is there, but no texture details appear. Is this a filtering issue, or have I done something wrong in my code?
private void OnResetDevice( Device device )
{
// Set projection
m_camera.AspectRatio = (float)BackBufferWidth / (float)BackBufferHeight;
device.Transform.Projection = m_camera.Projection;
// Set render states
device.RenderState.Lighting = false;
device.RenderState.FillMode = m_framework.FillMode;
device.SetRenderState( RenderStates.ZEnable, true );
// Allow multiple passes to blend together correctly
device.SetRenderState( RenderStates.AlphaBlendEnable, true );
device.SetRenderState( RenderStates.SourceBlend, (int)Blend.SourceAlpha );
device.SetRenderState( RenderStates.DestinationBlend, (int)Blend.InvSourceAlpha );
device.SetSamplerState(0, D3D.SamplerStageStates.MinFilter, (int)D3D.TextureFilter.Linear );
device.SetSamplerState(0, D3D.SamplerStageStates.MagFilter, (int)D3D.TextureFilter.Linear );
device.SetSamplerState(0, D3D.SamplerStageStates.MipFilter, (int)D3D.TextureFilter.Linear);
// Prevent some ugliness with the alphamaps
device.SetSamplerState(0, D3D.SamplerStageStates.AddressU, (int)D3D.TextureAddress.Clamp );
device.SetSamplerState(0, D3D.SamplerStageStates.AddressV, (int)D3D.TextureAddress.Clamp );
device.SetSamplerState(1, D3D.SamplerStageStates.MinFilter, (int)D3D.TextureFilter.Linear);
device.SetSamplerState(1, D3D.SamplerStageStates.MagFilter, (int)D3D.TextureFilter.Linear);
device.SetSamplerState(1, D3D.SamplerStageStates.MipFilter, (int)D3D.TextureFilter.Linear);
device.SetSamplerState(2, D3D.SamplerStageStates.MinFilter, (int)D3D.TextureFilter.Linear);
device.SetSamplerState(2, D3D.SamplerStageStates.MagFilter, (int)D3D.TextureFilter.Linear);
device.SetSamplerState(2, D3D.SamplerStageStates.MipFilter, (int)D3D.TextureFilter.Linear);
device.SetSamplerState(3, D3D.SamplerStageStates.MinFilter, (int)D3D.TextureFilter.Linear);
device.SetSamplerState(3, D3D.SamplerStageStates.MagFilter, (int)D3D.TextureFilter.Linear);
device.SetSamplerState(3, D3D.SamplerStageStates.MipFilter, (int)D3D.TextureFilter.Linear);
device.SetSamplerState(4, D3D.SamplerStageStates.MinFilter, (int)D3D.TextureFilter.Linear);
device.SetSamplerState(4, D3D.SamplerStageStates.MagFilter, (int)D3D.TextureFilter.Linear);
device.SetSamplerState(4, D3D.SamplerStageStates.MipFilter, (int)D3D.TextureFilter.Linear);
}
and the render calls
private void Render( Device device )
{
// Alphamap: take the alpha from the alphamap
device.SetTextureStageState(0, D3D.TextureStageStates.AlphaOperation, (int)D3D.TextureOperation.SelectArg1 );
device.SetTextureStageState(0, D3D.TextureStageStates.AlphaArgument1, (int)D3D.TextureArgument.TextureColor);
// Texture: take the color from the texture, take the alpha from the previous stage
device.SetTextureStageState(1, D3D.TextureStageStates.ColorOperation, (int)D3D.TextureOperation.SelectArg1 );
device.SetTextureStageState(1, D3D.TextureStageStates.ColorArgument1, (int)D3D.TextureArgument.TextureColor );
device.SetTextureStageState(1, D3D.TextureStageStates.AlphaOperation, (int)D3D.TextureOperation.SelectArg1 );
device.SetTextureStageState(1, D3D.TextureStageStates.AlphaArgument1, (int)D3D.TextureArgument.Current );
device.SetTexture(0, alp1);
device.SetTexture(1, tex1);
//...draw primitives
device.SetTexture(0, alp2);
device.SetTexture(1, tex2);
//...draw primitives
device.SetTexture(0, alp3);
device.SetTexture(1, tex3);
//...draw primitives
device.SetTexture(0, alp4);
device.SetTexture(1, tex4);
//...draw primitives
}
Thanks for your help
