/*
** Copyright (c) 2012 The Khronos Group Inc.
**
** Permission is hereby granted, free of charge, to any person obtaining a
** copy of this software and/or associated documentation files (the
** "Materials"), to deal in the Materials without restriction, including
** without limitation the rights to use, copy, modify, merge, publish,
** distribute, sublicense, and/or sell copies of the Materials, and to
** permit persons to whom the Materials are furnished to do so, subject to
** the following conditions:
**
** The above copyright notice and this permission notice shall be included
** in all copies or substantial portions of the Materials.
**
** THE MATERIALS ARE PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
** MATERIALS OR THE USE OR OTHER DEALINGS IN THE MATERIALS.
*/


attribute vec3 gtf_Normal;
attribute vec4 gtf_Vertex;
uniform mat3 gtf_NormalMatrix;
uniform mat4 gtf_ModelViewMatrix;
uniform mat4 gtf_ModelViewProjectionMatrix;

varying float lightIntensity;
varying vec3 Position;
uniform vec3 LightPosition;
uniform float Scale;

void main(void) {
	vec4 pos = gtf_ModelViewMatrix * gtf_Vertex;
	Position = vec3(gtf_Vertex) * Scale;
	vec3 tnorm = normalize(gtf_NormalMatrix * gtf_Normal);
	lightIntensity = dot(normalize(LightPosition - vec3(pos)), tnorm) * 1.5;
	gl_Position = gtf_ModelViewProjectionMatrix * gtf_Vertex;
}