Projection texture messed up

[Bruno]

Hello everyone.,

I’m giving my first steps in the world of shaders, and i’m having a little problem., i hope someone can give me some light.

I’m tryng to do a shader, to distort a water reflection.
The water reflection is already in a texture, and it’s being projected correctly to the water plane.,

But, somehow when i have automatic coordinates generation enabled in opengl, and i go trough the shader, the shader messes up my coords.
This is the shader :

The vertex program :

varying vec3  texCoord; 

void main(void) 
{ 
    texCoord    = gl_MultiTexCoord0.xyz; 
    gl_Position = ftransform(); 
}

and the fragment program

uniform sampler2D Texture0; 

varying vec3 texCoord; 

void main(void) 
{ 
    gl_FragColor = texture2DProj( Texture0, texCoord ); 
} 

I just want the reflected texture to show up, with anything changed, so i can start messing with it later.

thanks for any help,
Bruno

[imported_Ffelagund]

Hello,
The TexGen operations are disabled when you run vertex shaders, so you have two choices: not use vertex shaders (and use gl_TexCoord[0] in the fragment shader) or make your own computations to generate the texcoord. I didn’t tested the first way but should work.

[Bruno]

Many thanks Ffelagund , got it working