/*************************************************************
GLSL Demo - Gouraud vertex shader
(c) 2005 Antoine Bouthors, EVASION
*************************************************************/

void main()
{
	vec4 pos;
	pos = gl_ModelViewMatrix * gl_Vertex;
	vec3 lightpos = gl_LightSource[0].position.xyz;
	vec3 lightDir =  normalize( lightpos - pos.xyz );
	vec3 normal = normalize( gl_NormalMatrix * gl_Normal );

	vec3 ReflectedRay = reflect( lightDir, normal );

	vec3 color = vec3( pow( clamp( dot( ReflectedRay, vec3( 0., 0., -1. ) ), 0., 1. ), 10. ) );
	color += gl_LightSource[0].diffuse.xyz * clamp( dot( normal, lightDir ), 0., 1. );
	gl_FrontColor.xyz = .1 + .9*color;
	
	gl_Position = ftransform();
}