I am new to shader programming (like 1 Hr new :) and I can't work out how to send a float value from C++ to my shader.
The shader itself is working fine. If I set the 'nTest' value manually from within the shader I can make my object lighter of darker. But, I cant seem to get a value over to the shader from my app.
I am trying to send the value over using the following lines.
D3DXHANDLE nTest=mFX->GetParameterByName(0,"nTest");
mFX->SetFloat(nTest,0.5f);
This is my shader;
uniform extern float4x4 gWVP;uniform extern float fTest; struct OutputVS{ float4 posH : POSITION0;};OutputVS TransformVS(float3 posL : POSITION0){ OutputVS outVS = (OutputVS)0; outVS.posH = mul(float4(posL, 1.0f), gWVP); return outVS;}float4 TransformPS() : COLOR{ float4 AmbientColor = float4(1.0f,1.0f,1.0f,1.0f); return AmbientColor * fTest;}technique TransformTech{ pass P0 { vertexShader = compile vs_2_0 TransformVS(); pixelShader = compile ps_2_0 TransformPS(); FillMode = Wireframe; }}Be gentle, I am a complete newcomer to shaders :)
