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/usr/share/glmark2/shaders/light-refract.vert is in glmark2-data 2014.03+git20150611.fa71af2d-0ubuntu4.

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attribute vec3 position;
attribute vec3 normal;

uniform mat4 ModelViewProjectionMatrix;
uniform mat4 NormalMatrix;
uniform mat4 ModelViewMatrix;
uniform mat4 LightMatrix;

varying vec3 vertex_normal;
varying vec4 vertex_position;
varying vec4 MapCoord;

void main(void)
{
    vec4 current_position = vec4(position, 1.0);

    // Transform the normal to eye coordinates
    vertex_normal = normalize(vec3(NormalMatrix * vec4(normal, 1.0)));

    // Transform the current position to eye coordinates
    vertex_position = ModelViewMatrix * current_position;

    // Transform the current position for use as texture coordinates
    MapCoord = LightMatrix * current_position;

    // Transform the current position to clip coordinates
    gl_Position = ModelViewProjectionMatrix * current_position;
}