//*PIXEL*
#version 460 core

#extension GL_ARB_bindless_texture : require


uint INVALID_HYDRA_ID = 4294967295;

struct MaterialStore
{
	vec4 diffuse_colour;		 
	uint diffuse_texture_id;	
	uint padding[3];
};

layout(binding = 2, std430) readonly buffer MaterialBuffer
{
	MaterialStore materials[1000];
};

layout( std430, binding = 3) readonly buffer TextureBuffer {
    uvec2 textures[1000];
};

layout (location=0) in VS_OUT
{
	vec2 vsUV;
	vec4 vsWorldPos;
	flat uint vsChunkID;
	flat uint vsMaterialID;
}vs_out;

layout (location=0) out vec4 uFragColor;

void main()
{
	MaterialStore mat = materials[vs_out.vsMaterialID];
	//uvec2 tex_handle = textures[mat.diffuse_texture_id];    

	uvec2 handle = textures[mat.diffuse_texture_id];

	// 2. Explicitly cast the 64-bit integer handle to a sampler type
	//	sampler2D tex = sampler2D(handle);

	// 3. Sample the texture normally
	vec4 output_colour = texture(sampler2D(handle), vs_out.vsUV.xy);
	if(output_colour[3] <= 0.1)
	{
		discard;
	}
	
	uFragColor = output_colour;
	
	
	//uFragColor = vec4(vs_out.vsUV.x, vs_out.vsUV.y, 1, 1);
	
}