// shader.frag
#version 450

// Variables
layout(location=0) in vec2 vert_uv;
layout(location=0) out vec4 out_color;

layout(set=0, binding=0) uniform Uniforms 
{
    mat4 _viewMatrix;
    mat4 _projMatrixInv;
    vec3 _CamPos;
    float _Time;
};

//layout(set = 1, binding = 0) uniform texture3D node_tex;
//layout(set = 1, binding = 1) uniform usampler3D node_sampl;
layout(set=1,binding=0) uniform usampler3D nodesTexture;
layout(set=2,binding=0) uniform usampler3D bricksTexture;

// Defines
#define PI 3.141592
#define EPSILON 0.01
#define NEAR 0.01
#define MAX_STEPS 200

// Include
#include "shapes.cginc"
#include "raycasting.cginc"

void main() 
{
    // Calculate ray direction
    vec3 view_dir = (_projMatrixInv * vec4(vert_uv, 0, 1)).xyz;
    vec3 ray_dir = normalize(_viewMatrix * vec4(view_dir,0)).xyz;

    // Raycast
    out_color = vec4(castNodes(_CamPos, ray_dir), 1.0);
}