#version 460

in vec3 in_vertex;
in vec3 in_normal;
in vec2 in_texcoord;
uniform mat4 mvp;
uniform mat4 model;
uniform float factor;
out vec2 f_texcoord;
out vec4 light;

void main(void) {
	gl_Position = mvp * vec4(in_vertex + (clamp(factor, 0, 1) * in_normal), 1.0);
	f_texcoord = in_texcoord;

	vec3 normal = (model * vec4(in_normal, 1.0)).xyz;

	vec3 Direction = vec3(10, 5, 3); // Light direction
	vec3 I = vec3(1, .4, 0.4); // Light Intensity
	vec3 R = I * clamp(dot(normalize(Direction), normalize(normal)), 0, 1);
	// Note:  r is without the material

	vec3 Direction2 = vec3(10, -5, 3); // Light direction
	vec3 I2 = vec3(.3, .3, .9); // Light Intensity
	// If you don't use clamp, then you can do this instead
	float dp =  dot(normalize(Direction2), normalize(normal));
	if(dp < 0)
		dp = 0;
	vec3 R2 = I2 * dp;
	// Again, R2 lacks the material
	
	vec3 A = vec3(.1, .2, .1);
	// Same thing for A, no material
	
	light = vec4(R2 + R + A, 1.0);
}