#ifndef SKYBOX_INCLUDED
#define SKYBOX_INCLUDED

#include "Assets/_Content/Shaders/Include/Noises.hlsl"

void Skybox_float
(
    float3 ColorA,
    float3 ColorB,
    float3 ColorC,
    float3 ColorD,
    float3 PositionOS,
    out float3 Color
)
{
    float t = _Time.y;
    
    float gradient = length(PositionOS - float3(0, 0, 50));
    gradient += FBMNoise3D(PositionOS + float3(0, 0, t * 10), .1, 3, 2, .5) * 20 - 15;
    gradient -= RidgedNoise3D(PositionOS + gradient * .3 + float3(0, 0, t * 4), .1, 1, 2, .5) * 7;
    
    float3 c = ColorD;
    c = lerp(c, ColorC, smoothstep(40, 0, gradient));
    c = lerp(c, ColorB, smoothstep(26, 0, gradient));
    c = lerp(c, ColorA, smoothstep(18, 0, gradient));
    
    // Test

    //float test = ValueNoise3D(PositionWS, 40);
    //float test = PerlinNoise3D(PositionWS, 40);
    //float test = PerlinNoise3DLOD(PositionWS, 100, 3.5);
    //float test = SimplexNoise3D(PositionWS, 40);
    //float test = WorleyNoise3D(PositionWS, 40, 1);
    //float id;
    //float test = VoronoiNoise3D(PositionWS, 10, 1, .05, id);
    //float test = FBMNoise3D(PositionWS, 10, 2, 2, .5);
    //float test = RidgedNoise3D(PositionWS, 10, 2, 2, .5);
    
    // Output

    Color = c;
}

#endif