备份CatanBuilding瘦身独立工程

LocalPackages/StylizedWater2/Shaders/Libraries/Displacement.hlsl

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+//Functionality to sample the water's displacement pre-pass buffer
+
+uniform bool _WaterDisplacementPrePassAvailable;
+
+uniform float3 _WaterDisplacementCoords;
+//XY: Bounds min
+//Z: Bounds size
+uniform Texture2D _WaterDisplacementBuffer;
+#ifndef UNITY_CORE_SAMPLERS_INCLUDED
+SamplerState sampler_LinearClamp;
+#endif
+
+//Position, relative to rendering bounds (normalized 0-1)
+float2 WorldToDisplacementUV(float3 positionWS)
+{
+	return (positionWS.xz - _WaterDisplacementCoords.xy) / _WaterDisplacementCoords.z;
+}
+
+float SampleDisplacementBuffer(float2 uv)
+{
+	if(_WaterDisplacementPrePassAvailable == false) return 0;
+	const float height = _WaterDisplacementBuffer.SampleLevel(sampler_LinearClamp, uv, 0).r;
+
+	//Need to figure out how to determine if a void is hit
+	//if(height == 0.0f) return -1000;
+	
+	return height;
+}
+
+//Main function
+float SampleWaterHeight(float3 positionWS)
+{
+	return SampleDisplacementBuffer(WorldToDisplacementUV(positionWS));
+}
+
+//Shader Graph
+void SampleWaterHeight_float(float3 positionWS, out float height)
+{
+	#if defined(SHADERGRAPH_PREVIEW)
+	height = 0;
+	#else
+	height = SampleWaterHeight(positionWS);
+	#endif
+}