#version 150 core

in vec3 vs_in_pos;
in vec3 vs_in_normal;
uniform mat4 tmat;
uniform mat4 rmat;
uniform mat4 scale;
uniform vec3 inverseLightDir = vec3(0.0f,1.0f,0.0f);

out float brightness;

void main(void) {
    gl_Position = scale*tmat*rmat*vec4(vs_in_pos, 1);

    vec3 normalWC = mat3(rmat*scale)*vs_in_normal;
    vec3 normalWCn = normalize(normalWC);
    brightness = max(dot(normalWCn,inverseLightDir),0);

}