Pixel Shader help.

10-16-2009 8:50 PM |

 Hello all,

 

Im creating a pixel shader but im having problems.  I have 4 input textures  I want to draw them with a shader like below:

 

I was able to create a Shader that took in 4 textures, but I cant seem to draw them correctly.  here is the code im working with 

 

 

sampler2D tex1 : register(S0) = sampler_state
{
AddressU = WRAP;
AddressV = WRAP;
};


sampler2D tex2 : register(S1) = sampler_state
{
AddressU = CLAMP;
AddressV = WRAP;
};

sampler2D tex3 : register(S2) = sampler_state
{
AddressU = WRAP;
AddressV = WRAP;
};

sampler2D tex4 : register(S3) = sampler_state
{
AddressU = WRAP;
AddressV = WRAP;
};


float4 main(float2 TexCoord : TEXCOORD) : COLOR
{
	float4 blendWeight = 0;
	float4 color = 0;
	
   blendWeight.x = (TexCoord.x < 0.5 && TexCoord.y < 0.5) ? 1 : 0;
   blendWeight.y = (TexCoord.x >= 0.5 && TexCoord.y < 0.5) ? 1 : 0;
   blendWeight.z = (TexCoord.x < 0.5 && TexCoord.y >= 0.5) ? 1 : 0;
   blendWeight.w = (TexCoord.x >= 0.5 && TexCoord.y >= 0.5) ? 1 : 0;
	
	
	
	color += tex2D(tex1, TexCoord * 2)* blendWeight.x ;
	color += tex2D(tex2, TexCoord * 2) * blendWeight.y;
	color += tex2D(tex3, TexCoord * 2) * blendWeight.z;
	color += tex2D(tex4, TexCoord * 2) * blendWeight.w;

	
	return color;
}

  It copys the 4 textures over but it looks wrong.  Its like the sampler_state is CLAMPd.  Anyone know?

Edit: This does work in FX Composer, so im guessing this is a silverlight thing.

Re: Re: Pixel Shader help.

10-17-2009 2:14 PM |

 Yeah, that was exactly what the problem was I somehow removed my % 1 and just never saw it agian.  The final results are.

 

http://72.167.49.233/Pioneers/TestPage.html

 

Although I need to figure out how to rotate to fit my polygon which is supposed to represent a quad, I have no idea if this is possible.  Some how create texture mapping coordinates.