#version 430 core

float AMBIENT = 0.1;

uniform vec3 color;
uniform vec3 lightPos;
uniform vec3 lightColor;

in vec3 vecNormal;
in vec3 worldPos;
in vec2 vtc;
vec4 textureColor;
out vec4 outColor;

vec3 outputColor;
uniform sampler2D colorTexture;

vec3 toneMapping(vec3 color){
	float exposure = 0.06;
	vec3 mapped = 1 - exp(-color*exposure);
	return mapped;
}


void main()
{
	vec3 lightDir = normalize(lightPos - worldPos);
	vec3 normal = normalize(vecNormal);
	float diffuse = max(0, dot(normal, lightDir));
	textureColor = texture2D(colorTexture, vtc);
	vec3 distance = lightColor/pow(length(lightPos - worldPos), 2.0) * 200;
	outputColor = vec3(textureColor) * min(1, AMBIENT + diffuse)* distance;
	//gamma correction
	//outputColor = pow(outputColor, vec3(1.0/2.2)); 

	outputColor = toneMapping(outputColor);
	outColor = vec4(outputColor , 1.0);
}