2026-06-09 룸 프로토타입 디자인 (진행중)

Assets/Stylized Water 3/Shaders/Libraries/Terrain.hlsl

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+// Stylized Water 3 by Staggart Creations (http://staggart.xyz)
+// COPYRIGHT PROTECTED UNDER THE UNITY ASSET STORE EULA (https://unity.com/legal/as-terms)
+//    • Copying or referencing source code for the production of new asset store, or public, content is strictly prohibited!
+//    • Uploading this file to a public repository will subject it to an automated DMCA takedown request.
+
+#if !defined(SHADERGRAPH_PREVIEW)
+//#include "Packages/com.unity.render-pipelines.core/ShaderLibrary/Core.hlsl"
+#else
+SamplerState sampler_LinearClamp;
+#endif
+
+#include "Projection.hlsl"
+
+uniform Texture2D _TerrainHeightBuffer;
+float4 _TerrainHeightBuffer_TexelSize;
+uniform float3 _TerrainHeightRenderCoords;
+//XY: Bounds min
+//Z: Bounds size
+bool _TerrainHeightPrePassAvailable;
+
+uniform Texture2D _WaterTerrainDistanceField;
+
+
+//Position, relative to rendering bounds (normalized 0-1)
+float2 WorldToTerrainUV(float3 positionWS)
+{
+	return WorldToProjectionUV(positionWS, _TerrainHeightRenderCoords.xy, _TerrainHeightRenderCoords.z);
+}
+
+float SampleTerrainHeightBuffer(float2 uv)
+{
+	if(_TerrainHeightPrePassAvailable == false) return 0;
+	return UnpackHeightmap(_TerrainHeightBuffer.SampleLevel(sampler_LinearClamp, uv, 0).r);
+}
+
+//Main function
+float SampleTerrainHeightBuffer(float3 positionWS)
+{
+	return SampleTerrainHeightBuffer(WorldToTerrainUV(positionWS));
+}
+
+float SampleTerrainHeight(float3 positionWS)
+{
+	return SampleTerrainHeightBuffer(positionWS);
+}
+
+//Shader Graph
+void SampleTerrainHeight_float(float3 positionWS, out float height)
+{
+	height = SampleTerrainHeightBuffer(positionWS);
+}
+
+TEXTURE2D(_WaterTerrainIntersectionMask);
+float SampleTerrainIntersection(float3 positionWS)
+{
+	return _WaterTerrainIntersectionMask.SampleLevel(sampler_LinearClamp, WorldToTerrainUV(positionWS), 0).r;
+}
+
+float SampleTerrainDepth(float3 positionWS, float falloff)
+{
+	float terrainHeight = SampleTerrainHeightBuffer(positionWS);
+
+	//Sampling position will correspond to the actual terrain position on the XZ plane
+	float3 terrainPosition = float3(positionWS.x, terrainHeight, positionWS.z);
+
+	//if(terrainPosition.y >= positionWS.y) return 0;
+
+	float dist = abs(distance(positionWS, terrainPosition));
+
+	float attenuation = 1-saturate(dist / falloff);
+
+	//attenuation = saturate(exp(-(dist * falloff)));
+
+	return attenuation;
+}
+
+
+//Shader Graph
+void SampleTerrainDepth_float(float3 positionWS, float falloff, out float attenuation)
+{
+	attenuation = SampleTerrainDepth(positionWS, falloff);
+}
+
+float SampleTerrainSDF(float3 positionWS)
+{
+	float sdfSample = _WaterTerrainDistanceField.SampleLevel(sampler_LinearClamp, WorldToTerrainUV(positionWS), 0).r;
+
+	float edgeMask = ProjectionEdgeMask(positionWS, _TerrainHeightRenderCoords.xy, _TerrainHeightRenderCoords.z, 15);
+
+	return sdfSample * edgeMask;
+}