#version 450
#extension GL_ARB_separate_shader_objects : enable
#extension GL_ARB_shading_language_420pack : enable

layout(location = 0) in struct
{
  //mat3 BTN;
  vec4 vertColor;
  //vec3 localSpacePosition;
  //vec2 uv;
  //vec3 localLightPosition;
  //vec3 localEyePosition;

} In;

//layout(std140, push_constant) uniform TestPushConstant
//{
//  mat4 pvMat;
//  vec4 lightPosition;
//  vec4 eyePosition;
//  vec4 ambientColor;
//  vec4 lightColor;
//
//} testPushConstant;

layout(location = 0) out vec4 outColor;

//layout(binding = 0) uniform sampler2D diffuseMap;
//layout(binding = 1) uniform sampler2D normalMap;
//layout(binding = 2) uniform sampler2D aoMap;
//layout(binding = 3) uniform sampler2D glossinessMap;
//layout(binding = 4) uniform sampler2D samplerRoughnessMap;

void main()
{
  //vec3 normal;

  //// Get the tangent space normal from normal map. It is a BC5 texture and therefore only use red and green
  //normal.xy = (texture (normalMap, In.uv).gr * 2.0f) - 1.0f;

  //// z value is derived (TODO: Find out what this does)
  //normal.z = sqrt(1.0f - dot(normal.xy, normal.xy));

  //// Transform the normal from tangent space to local space
  //normal = In.BTN * normal;

  //// Get the vector from fragment to light
  //vec3 localLightDir = normalize(In.localLightPosition - In.localSpacePosition);

  //// get the value of dot between normal from texture and frag to light
  //float diffuse = max(0, dot(normal, localLightDir));

  //// sample the diffuse texture
  //vec4 diffuseColor = texture (diffuseMap, In.uv) * In.vertColor;

  //vec3 eyeDirection = normalize(In.localSpacePosition - In.localEyePosition);

  //const float shininess = mix(1, 100, 1 - texture (samplerRoughnessMap, In.uv).r);

  //float specular = pow(max(0, dot(normal, normalize(localLightDir - eyeDirection))), shininess);

  //outColor.rgb = testPushConstant.ambientColor.rgb * diffuseColor.rgb * texture (aoMap, In.uv).rgb;

  //outColor.rgb += testPushConstant.lightColor.rgb * (specular.rrr * 0.4 + diffuse.rrr * diffuseColor.rgb);

  //const float gamma = testPushConstant.eyePosition.w;
  //outColor.rgb = pow(outColor.rgb, vec3(1.0f / gamma));
  //outColor.a = diffuseColor.a;


  outColor = vec4 (1.0f);
}