#version 330 core

layout (location = 0) in vec3 v_position;
layout (location = 1) in vec3 v_normal;
layout (location = 2) in vec3 v_color;

out vec4 a_color;
uniform mat4 projview;
uniform mat4 model;

void main(){
//	gl_Position = vec4(v_position, 1) * projview;
	gl_Position = projview * model * vec4(v_position, 1);

	// dot получается [-1 ... 1]
	float l = dot((model * vec4(v_position, 1)).xyz, normalize(vec3(1, 1, 1)));
	// сначала делаем диапазон [1 ... 3]
	// потом [0.5 ... 1]
	l = (l + 2) / 3;

	a_color = vec4(v_color * l, 1);
}