#ifndef FOG_INCLUDED
#define FOG_INCLUDED

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

void Fog_float
(
    float4 ColorA,
    float4 ColorB,
    float3 PositionWS,
    float3 PositionOS,
    float3 PivotWS,
    float3 Scale,
    out float3 Output,
    out float Alpha
)
{
    // 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);
    float3 camPos = _WorldSpaceCameraPos.xyz;
    float depth = distance(camPos, PositionWS);
    float depthAtten = smoothstep(5, 30, depth);
    
    
    float t = _Time.y * .7;
    float s = lerp(Scale.x, 1, .3);
    
    
    float3 p = PositionWS;// - PivotWS;
    p += float3(t, t * .2, t);
    
    float noise = RidgedNoise3D(p - PivotWS * .9, .1, 5, 1.6, 1);
    
    p += noise * 3;
    
    float fog = FBMNoise3D((p - PivotWS * .5), 10 / s, 3, 1.5, .5);
    
    float4 col = lerp(ColorA, ColorB, saturate(RidgedNoise3D((p - PivotWS * .9) * float3(1, 1.6, 1), 3 / s, 3, 1.6, 1)));
    
    float mask = smoothstep(0, lerp(.3, .1, depthAtten), PositionOS.y) * pow(smoothstep(1, .5, PositionOS.y - .15 + noise * .3), 2);
    
    // Output

    Output = col.rgb;
    Alpha = lerp(fog, smoothstep(1, .5, PositionOS.y), depthAtten * mask) * lerp(.2, 1, smoothstep(0, 15, depth)) * mask * col.a;
}

#endif