#version 330

const float GLOSSINESS_POWER = 32.0;
const vec3 lightColor = vec3(1.0, 1.0, 1.0);
const float lightIntensityMult = 1.0;
const float emissiveLightMult = 0.5;

uniform vec3 u_lightWorldPos;

uniform sampler2D u_diffuseMap;
uniform sampler2D u_normalMap;
uniform sampler2D u_specularMap;
uniform vec3 u_cameraWorldPos;

uniform float u_time;

in vec4 v_surfaceColor;
in vec3 v_worldPosition;
in vec3 v_normal;
in vec2 v_texCoords;
in vec3 v_tangent;
in vec3 v_bitangent;

out vec4 fragColor;

vec3 DecodeXYZfromRGB(vec3 RGB) {
	return (2.0 * RGB) - 1.0;
}

vec3 EncodeRGBfromXYZ(vec3 xyz) {
	return (xyz + 1) / 2;
}

vec4 EncodeRGBAfromXYZ(vec3 xyz) {
	return vec4((xyz + 1) / 2, 1);
}
 
void main()
{

	vec4 diffuseTexel = texture(u_diffuseMap, v_texCoords);

	vec3 pixelColor = (diffuseTexel.rgb * v_surfaceColor.rgb);
	vec3 finalPixelColor = pixelColor;
	float pixelAlpha = v_surfaceColor.a * diffuseTexel.a;
	fragColor = vec4(finalPixelColor, pixelAlpha);
	//fragColor = vec4(normalTexel.rgb, 1.0);
}