#version 150

in vec3 attribPosition;

in vec3 attribNormal;

uniform float scale;

uniform mat4 modelTransformMatrix;

uniform mat4 cameraMatrix;

uniform mat4 projectionMatrix;

uniform vec4 color;

flat out vec3 normal;

out vec4 eyePos;

out vec4 primaryColor;

void main() {

    mat4 scaleMatrix = mat4(scale);

    scaleMatrix[3].w = 1.0;

    mat4 transform = cameraMatrix * modelTransformMatrix * scaleMatrix;

    mat3 normalTransform = mat3(transform[0].xyz, transform[1].xyz, transform[2].xyz);

    // normal

    normal = normalize(transform * vec4(attribNormal, 0.0)).xyz;

    // position

    eyePos = transform * vec4(attribPosition, 1.0);

    gl_Position = projectionMatrix * eyePos;

    // color

    primaryColor = color;

}