Title:           [OpenGL Shading] lighting.vsh
Author:          dajfarrell
Pastebin link:   http://pastebin.com/YRjt62CP
First Edit:      Wednesday 6th of June 2012 06:57:05 PM CDT
Last Edit:       Wednesday 6th of June 2012 06:57:05 PM CDT

const int MAX_POINT_LIGHTS = 8;
 
struct PLPointLight {
    vec4 vLightPosition;
   
    vec3 vDiffuse;
    vec3 vSpecular;
   
    float fConstantAttenuation;
    float fLinearAttenuation;
    float fQuadraticAttenuation;
    float fCubicAttenuation;
    float fQuarticAttenuation;
};
 
uniform mat4 pl_ModelViewMatrix;
uniform mat4 pl_ProjectionMatrix;
uniform mat4 pl_ModelViewProjectionMatrix;
 
uniform vec3 pl_GlobalAmbient;
 
uniform PLPointLight pl_PointLights[MAX_POINT_LIGHTS];
 
varying vec3 vNormal;
varying vec4 vEyeCameraPosition;
 
void main() {
    // Calculate and set position.
    vec4 vPosition = pl_ModelViewProjectionMatrix * gl_Vertex;
    gl_Position = vPosition;
   
    // Set up normal matrix.
    mat3 mNormalMatrix;
    mNormalMatrix[0] = pl_ModelViewMatrix[0].xyz;
    mNormalMatrix[1] = pl_ModelViewMatrix[1].xyz;
    mNormalMatrix[2] = pl_ModelViewMatrix[2].xyz;
     
    // Calculate normal vector.
    vNormal = normalize(mNormalMatrix * gl_Normal);
   
    // Calculate eye camera position.
    vEyeCameraPosition = pl_ModelViewMatrix * gl_Vertex;
}