Re: beginner pixel shader problem

BJM — Sat, 13 Jun 2009 21:51:17 GMT

I found the answer here:
http://forums.xna.com/forums/p/32901/189208.aspx#189208

beginner pixel shader problem

BJM — Sat, 13 Jun 2009 15:48:35 GMT

Hi,

I am trying to make a post processing pixel shader effect. To do this i use 2 textures.
In my effect i do this:

sampler samplerLeftEye; //Texture 1
texture RightEye; //Texture 2

// TODO: add effect parameters here.
struct PixelInput
{
float2 TextureCoordinate0 : TEXCOORD0;
float2 TextureCoordinate1 : TEXCOORD1;
};

sampler samplerRightEye = sampler_state
{
    Texture = <RightEye>;
    Magfilter = LINEAR;
    Minfilter = LINEAR;
    Mipfilter = LINEAR;
    AddressU = mirror;
    AddressV = mirror;
};

float4 PixelShaderFunction(PixelInput input) : COLOR
{
    float4 left;
    float4 right;

    left = tex2D(samplerLeftEye, input.TextureCoordinate0);
    right = tex2D(samplerRightEye, input.TextureCoordinate1);

    left.a = 0.5f;
    right.a = 0.5f;

return (left+right);
}

technique Technique1
{
    pass Pass1
    {
        // TODO: set renderstates here.
        PixelShader = compile ps_1_1 PixelShaderFunction();
    }
}

How ever when i run my project only the samplerLeftEye Texture is drawn because the tex2D(samplerRightEye, input.TextureCoordinate1);
results in a black texture. It has something to do with the input.TextureCoordinate1. If i use input.TextureCoordinate0 i get an error saying i can't use
TEXCOORD0 twice.

How can i solve this problem?

Direct3D

Re: beginner pixel shader problem

beginner pixel shader problem