71 lines
2.0 KiB
Plaintext
71 lines
2.0 KiB
Plaintext
// Crest Water System
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// Copyright © 2024 Wave Harmonic. All rights reserved.
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// Draw cached world-space heights into current frame data. If heights are coming
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// from an ODC, then they are in object-space and are converted to world-space as
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// the LOD data stores world-space height.
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#pragma kernel CrestExecute
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#pragma multi_compile_local __ d_CrestSDF
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#include "HLSLSupport.cginc"
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#include "Packages/com.waveharmonic.crest/Runtime/Shaders/Library/Macros.hlsl"
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#include "Packages/com.waveharmonic.crest/Runtime/Shaders/Library/Constants.hlsl"
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#include "Packages/com.waveharmonic.crest/Runtime/Shaders/Library/Globals.hlsl"
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#include "Packages/com.waveharmonic.crest/Runtime/Shaders/Library/Helpers.hlsl"
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#include "Packages/com.waveharmonic.crest/Runtime/Shaders/Library/InputsDriven.hlsl"
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#include "Packages/com.waveharmonic.crest/Runtime/Shaders/Library/Cascade.hlsl"
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#define m_CrestType float
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#if d_CrestSDF
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#undef m_CrestType
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#define m_CrestType float2
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#endif
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Texture2D<m_CrestType> _Crest_Texture;
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RWTexture2DArray<m_CrestType> _Crest_Target;
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CBUFFER_START(CrestInputTexture)
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float2 _Crest_Multiplier;
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float2 _Crest_TextureSize;
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float2 _Crest_TexturePosition;
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float2 _Crest_TextureRotation;
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float _Crest_HeightOffset;
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bool _Crest_SDF;
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CBUFFER_END
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m_CrestNameSpace
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void Execute(uint3 id)
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{
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const Cascade cascade = Cascade::MakeDepth(id.z);
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const float2 uv = DataIDToInputUV(id.xy, cascade, _Crest_TexturePosition, _Crest_TextureRotation, _Crest_TextureSize);
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// Check we are within bounds.
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if (!WithinUV(uv))
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{
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return;
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}
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m_CrestType current = _Crest_Target[id];
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m_CrestType result = _Crest_Texture.SampleLevel(LODData_linear_clamp_sampler, uv, 0) * _Crest_Multiplier;
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result.x += _Crest_HeightOffset;
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// Take highest terrain height.
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result.x = max(current.x, result.x);
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#if d_CrestSDF
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// Take shortest distance.
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result.y = _Crest_SDF ? min(current.y, result.y) : current.y;
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#endif
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_Crest_Target[id] = result;
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}
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m_CrestNameSpaceEnd
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m_CrestInputKernelDefault(Execute)
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