Reflection shader - Vertex Shader

#version 150
#define GL_core_profile 1
#extension GL_EXT_gpu_shader4 : enable
#extension GL_ARB_shader_texture_lod : enable

uniform mat4 Gpu_ModelViewMatrix;                   // Modelview
uniform mat4 Gpu_ModelViewMatrixInverse;    // Inverse of modelview
uniform mat4 Gpu_ProjectionMatrix;              // Projection
uniform mat3 Gpu_NormalMatrix;                      // Normal matrix (IT of 3x3 rotation part of modelview)
uniform vec3 lightPos;                                      // Light position

in vec3 Gpu_Vertex;                 // Vertices (attr 0)
in vec3 Gpu_Normal;                 // Normals (attr 3)
in vec4 Gpu_MultiTexCoord0; // TexCoords (attr 1 and 2)
in vec4 Gpu_MultiTexCoord1;

out vec3 vert_vout;                 // Vertices in view space
out vec3 normal_vout;               // Normals in view space
out vec3 light_vout;                // Light in view space
out vec4 projCoord_vout;        // Projection coordinates (projective texcoords between -1 - 1 from camera)

void main()
{
    vert_vout = vec3(Gpu_ModelViewMatrix * vec4(Gpu_Vertex, 1.0));
    light_vout = vec3(Gpu_ModelViewMatrixInverse * vec4(lightPos, 1.0));
    normal_vout = Gpu_NormalMatrix * Gpu_Normal;
    projCoord_vout = Gpu_ProjectionMatrix * Gpu_ModelViewMatrix * vec4(Gpu_Vertex, 1.0);

    gl_Position = projCoord_vout;
}