#version 130

uniform mat4 mvpMatrix;
uniform mat4 mvMatrix;
uniform mat3 normalMatrix;
uniform vec3 lightPosition;

in vec4 vertex;
in vec3 normal;
in vec2 textureCoordinate;

out vec3 varyingNormal;
out vec3 varyingLightDirection;
out vec3 varyingViewerDirection;
out vec2 varyingTextureCoordinate;

void main(void)
{
    vec4 eyeVertex = mvMatrix * vertex;
    eyeVertex /= eyeVertex.w;
    varyingNormal = normalMatrix * normal;
    varyingLightDirection = lightPosition - eyeVertex.xyz;
    varyingViewerDirection = -eyeVertex.xyz;
    varyingTextureCoordinate = textureCoordinate;
    gl_Position = mvpMatrix * vertex;
}