/*
Bump/parallax mapping shader for not more than 8 light sources
The slowest bump/parallax mapping shader

*/
uniform vec3 CamPos;
uniform mat3 ModelRotateMatrix;
uniform vec3 ModelTranslateVector;
uniform int ActiveLightCount;

attribute vec3 Tangent;
attribute vec3 Binormal;

varying vec2 texCoord;
varying int activeLightCount;
varying vec3 camVec;
varying vec3 lightVec[8];

void main()
{
	gl_Position = gl_ModelViewProjectionMatrix * vec4(ModelRotateMatrix * gl_Vertex.xyz + ModelTranslateVector, 1.0); 
	
	texCoord = gl_MultiTexCoord0.st;
	
	activeLightCount = ActiveLightCount;
	
	mat3 rot;
	rot[0] = Tangent;
	rot[1] = Binormal;
	rot[2] = gl_Normal.xyz;
	
	rot = ModelRotateMatrix * rot;
	
	vec3 lVec;
	vec3 cVec = (CamPos - gl_Vertex.xyz);
	
	camVec =  cVec * rot;
	
	for (int i=0;i<ActiveLightCount;i++)
	{
		if (gl_LightSource[i].position.w == 0.0)
			lVec = gl_LightSource[i].position.xyz;
		else
			lVec = gl_LightSource[i].position.xyz - gl_Vertex.xyz;
	
		lightVec[i] = lVec * rot;
	}

}