procedural-3d-engine/data/shaders/instancing/instancing.frag

#version 450

#extension GL_ARB_separate_shader_objects : enable
#extension GL_ARB_shading_language_420pack : enable

layout (binding = 1) uniform sampler2DArray samplerArray;

layout (location = 0) in vec3 inNormal;
layout (location = 1) in vec3 inColor;
layout (location = 2) in vec3 inEyePos;
layout (location = 3) in vec3 inLightVec;
layout (location = 4) in vec3 inUV;

layout (location = 0) out vec4 outFragColor;

void main() 
{
	vec4 color = texture(samplerArray, inUV) * vec4(inColor, 1.0);	

	vec3 N = normalize(inNormal);
	vec3 L = normalize(vec3(1.0));	
	
	vec3 Eye = normalize(-inEyePos);
	vec3 Reflected = normalize(reflect(-inLightVec, inNormal)); 

	vec4 IAmbient = vec4(vec3(0.1), 1.0);
	vec4 IDiffuse = vec4(1.0) * max(dot(inNormal, inLightVec), 0.0);
	
	float specular = 0.75;
	vec4 ISpecular = vec4(0.5, 0.5, 0.5, 1.0) * pow(max(dot(Reflected, Eye), 0.0), 32.0) * specular; 	
 
	outFragColor = vec4((IAmbient + IDiffuse) * color + ISpecular);	
	
}