57 lines
1.8 KiB
HLSL
57 lines
1.8 KiB
HLSL
// Crest Water System
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// Copyright © 2024 Wave Harmonic. All rights reserved.
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#ifndef d_WaveHarmonic_Crest_SurfaceData
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#define d_WaveHarmonic_Crest_SurfaceData
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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/Globals.hlsl"
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#include "Packages/com.waveharmonic.crest/Runtime/Shaders/Surface/Utility.hlsl"
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TEXTURE2D_FLOAT(_Crest_WaterLine);
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float _Crest_WaterLineTexel;
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float2 _Crest_WaterLineResolution;
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float2 _Crest_WaterLineSnappedPosition;
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bool _Crest_WaterLineFlatWater;
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m_CrestNameSpace
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float SampleWaterLineHeight(const float2 i_PositionWS)
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{
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if (_Crest_WaterLineFlatWater)
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{
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return g_Crest_WaterCenter.y;
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}
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else
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{
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const float2 uv = (i_PositionWS - _Crest_WaterLineSnappedPosition) / (_Crest_WaterLineTexel * _Crest_WaterLineResolution) + 0.5;
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return _Crest_WaterLine.SampleLevel(_Crest_linear_clamp_sampler, uv, 0).r + g_Crest_WaterCenter.y;
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}
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}
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half3 SampleWaterLineNormal(const float2 i_PositionWS, const float i_Height)
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{
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if (_Crest_WaterLineFlatWater)
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{
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return half3(0, 1, 0);
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}
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else
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{
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const float2 uv = (i_PositionWS - _Crest_WaterLineSnappedPosition) / (_Crest_WaterLineTexel * _Crest_WaterLineResolution) + 0.5;
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const float3 dd = float3(1.0 / _Crest_WaterLineResolution.xy, 0.0);
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const float xOffset = _Crest_WaterLine.SampleLevel(_Crest_linear_clamp_sampler, uv + dd.xz, 0).r;
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const float zOffset = _Crest_WaterLine.SampleLevel(_Crest_linear_clamp_sampler, uv + dd.zy, 0).r;
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return normalize(half3
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(
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(xOffset - i_Height) / _Crest_WaterLineTexel,
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1.0,
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(zOffset - i_Height) / _Crest_WaterLineTexel
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));
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}
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}
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m_CrestNameSpaceEnd
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#endif
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