备份CatanBuilding瘦身独立工程

LocalPackages/StylizedWater2/Shaders/Libraries/Foam.hlsl

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+//Stylized Water 2
+//Staggart Creations (http://staggart.xyz)
+//Copyright protected under Unity Asset Store EULA
+
+#ifndef WATER_FOAM_INCLUDED
+#define WATER_FOAM_INCLUDED
+
+#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
+
+TEXTURE2D(_FoamTex);
+SAMPLER(sampler_FoamTex);
+
+#define FOAM_CHANNEL 0
+
+float SampleFoamTexture(TEXTURE2D_PARAM(tex, samplerName), float2 uv, float2 tiling, float subTiling, float2 time, float speed, float subSpeed, float slopeMask, float slopeSpeed, float slopeStretch, bool slopeFoamOn)
+{
+	float4 uvs = PackedUV(uv, tiling, time, speed, subTiling, subSpeed);
+
+	float f1 = SAMPLE_TEXTURE2D(tex, samplerName, uvs.xy)[FOAM_CHANNEL];	
+	float f2 = SAMPLE_TEXTURE2D(tex, samplerName, uvs.zw)[FOAM_CHANNEL];
+
+	#if UNITY_COLORSPACE_GAMMA
+	f1 = SRGBToLinear(f1);
+	f2 = SRGBToLinear(f2);
+	#endif
+
+	float foam = saturate(f1 + f2);
+
+	if(slopeFoamOn)
+	{
+		uvs = PackedUV(uv, tiling, time, speed * slopeSpeed, subTiling, subSpeed * slopeSpeed);
+		//Stretch UV vertically on slope
+		uvs.yw *= 1-slopeStretch;
+
+		//Cannot reuse the same UV, slope foam needs to be resampled and blended in
+		float f3 = SAMPLE_TEXTURE2D(tex, samplerName, uvs.xy)[FOAM_CHANNEL];
+		float f4 = SAMPLE_TEXTURE2D(tex, samplerName, uvs.zw)[FOAM_CHANNEL];
+
+		#if UNITY_COLORSPACE_GAMMA
+		f3 = SRGBToLinear(f3);
+		f4 = SRGBToLinear(f4);
+		#endif
+
+		const half slopeFoam = saturate(f3 + f4);
+	
+		foam = lerp(foam, slopeFoam, slopeMask);
+	}
+
+	return foam;
+}
+
+float SampleFoamTexture(float2 uv, float2 tiling, float subTiling, float2 time, float speed, float subSpeed, float slopeMask, float slopeSpeed, half slopeStretch, bool slopeFoamOn)
+{
+	return SampleFoamTexture(TEXTURE2D_ARGS(_FoamTex, sampler_FoamTex), uv, tiling, subTiling, time, speed, subSpeed, slopeMask, slopeSpeed, slopeStretch, slopeFoamOn);
+}
+#endif