wip: HouseOfLeaves

Assets/_Content/Models/Environments/HouseOfLeaves/Shaders/Sand.hlsl

@@ -0,0 +1,79 @@
+#ifndef SAND_INCLUDED
+#define SAND_INCLUDED
+
+//#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Lighting.hlsl"
+#include "Assets/_Content/Shaders/Include/Noises.hlsl"
+
+void Sand_float
+(
+    float Progression,
+    float3 PositionWS,
+    float3 NormalWS,
+    out float3 Position,
+    out float Height,
+    out float Debug
+)
+{
+    //float t = frac(_Time.y / 20);
+    float t = Progression;
+    t -= RidgedNoise3D(PositionWS, .3, 1, 2, .5) * .3;
+    
+    
+    float depth = length(PositionWS - _WorldSpaceCameraPos.xyz);
+    //Light mainLight = GetMainLight(0);
+    //float3 mainLightDir = normalize(mainLight.direction);
+    //float lightGradient = dot(normalize(NormalWS), normalize(mainLightDir));
+    //lightGradient = smoothstep(-.5, 1, lightGradient);
+    //float ao = GetScreenSpaceAmbientOcclusion(ScreenUV).directAmbientOcclusion;
+    
+    // Arks
+    
+    float arkMask = abs(frac(PositionWS.z * .5) * 2 - 1);
+    arkMask = pow(smoothstep(.7, 0, arkMask), 2);
+    arkMask += smoothstep(2.8, 3.2, abs(PositionWS.x));
+    arkMask = saturate(arkMask);
+    
+    // Sand
+    
+    float sandLayers = 6;
+    
+    float sandDirection = cos(t * sandLayers * 3.14);
+    
+    float sandDensity = smoothstep(1.5, 0, abs(PositionWS.x));
+    sandDensity = saturate(sandDensity + arkMask);
+    
+    float sandPatern = RidgedNoise3D(PositionWS + float3(sandDirection, 0, 0), .6, 1, 2, .5) * .8;
+    sandPatern += 1 - RidgedNoise3D(PositionWS + float3(0, 0, t * sandLayers * 2), .8, 2, 2, .5) * .2;
+    
+    float sandGradientSign = (floor(t * sandLayers) % 2 == 0) ? 1 : -1;
+    float sandGradient = smoothstep(2 * -sandGradientSign, 2 * sandGradientSign, PositionWS.x);
+    float sandPhase = frac(t * sandLayers);
+    float sandFlow = smoothstep(sandPhase * 2, sandPhase * 2 - 1, sandGradient);
+    sandFlow = (sandFlow + floor(t * sandLayers)) / sandLayers;
+    
+    float sandMask = sandFlow * 1.5 - t * .8 + (sandPatern * 2 - 1) * sandDensity * t * .3;
+    
+    // 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
+
+    Position = PositionWS;
+    Position.y += sandMask;
+    
+    Height = sandMask;
+    
+    Debug = 1;
+    //Debug = sandFlow;
+}
+
+#endif