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

struct MatPropData
{
  int textureIndex;
  float alpha;
  float sliderThreshold;
  float borderThickness;
  vec4 sliderStartColor;
  vec4 sliderEndColor;
  vec4 sliderBarColor;
};

layout(location = 0) in struct
{
  vec4 vertPos; // location 0
  vec2 uv; // location = 1
  vec4 normal; // location = 2

} In;

// material stuff
layout(location = 3) flat in struct
{
  int materialIndex;
  uint eid;
  uint lightLayerIndex;

} In2;

layout (set = 0, binding = 1) uniform sampler2D textures[]; // for textures (global)
layout (std430, set = 2, binding = 0) buffer MaterialProperties     // For materials 
{
  MatPropData data[];
} MatProp;

layout(location = 0) out vec4 fragColor;
layout(location = 1) out uint outEntityID;

void main()
{
  //fragColor = texture(textures[nonuniformEXT(MatProp.data[In2.materialIndex].textureIndex)], In.uv);



  if (In.uv.x > MatProp.data[In2.materialIndex].sliderThreshold)
    fragColor = MatProp.data[In2.materialIndex].sliderBarColor;
  else
    fragColor = (1.0f - In.uv.x) * MatProp.data[In2.materialIndex].sliderStartColor + In.uv.x * MatProp.data[In2.materialIndex].sliderEndColor;
    //fragColor = texture(textures[nonuniformEXT(MatProp.data[In2.materialIndex].textureIndex)], In.uv);
  if (fragColor.a < 0.01f)
  {
    discard;
  }

  fragColor.a = MatProp.data[In2.materialIndex].alpha;

  // fragColor.a = 1.0f;
  outEntityID = In2.eid;
}