Axiom.RenderSystems.DirectX9.D3DRenderSystem.BindGpuProgram C# (CSharp) Метод

        public override void BindGpuProgram( GpuProgram program )
        {
            switch ( program.Type )
            {
                case GpuProgramType.Vertex:
                    ActiveD3D9Device.VertexShader = ( (D3DVertexProgram)program ).VertexShader;
                    break;

                case GpuProgramType.Fragment:
                    ActiveD3D9Device.PixelShader = ((D3DFragmentProgram)program).PixelShader;
                    break;

                case GpuProgramType.Geometry:
                    throw new AxiomException( "Geometry shaders not supported with D3D9" );
            }

            // Make sure texcoord index is equal to stage value, As SDK Doc suggests:
            // "When rendering using vertex shaders, each stage's texture coordinate index must be set to its default value."
            // This solves such an errors when working with the Debug runtime -
            // "Direct3D9: (ERROR) :Stage 1 - Texture coordinate index in the stage must be equal to the stage index when programmable vertex pipeline is used".
            for (var nStage=0; nStage < 8; ++nStage)
                SetTextureStageState(nStage, TextureStage.TexCoordIndex, nStage);

            base.BindGpuProgram( program );
        }