/*
*   Vertex shader for a "film grain" function. Just passes along the
*       vertex position for the fragment shader.
*
*   Alexandri Zavodny, Fall 2010 
*       for CSE 40166/60166 Computer Graphics, University of Notre Dame
*/

uniform float time;
varying vec4 vertexInImageSpace;

void main()
{
    vec4 transformedVertex = gl_ModelViewMatrix * gl_Vertex;

    //not sure if you can access the vertex position in the fragment shader,
    //so be safe and pass that along as a varying. don't normalize!
    vertexInImageSpace = gl_ModelViewProjectionMatrix * gl_Vertex;

    gl_Position = ftransform();
}