88 lines
2.5 KiB
Plaintext
88 lines
2.5 KiB
Plaintext
// Crest Water System
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// Copyright © 2024 Wave Harmonic. All rights reserved.
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// This writes straight into the displacement texture and sets the water height to the y value of the geometry.
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Shader "Crest/Inputs/Animated Waves/Set Water Height Using Geometry"
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{
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Properties
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{
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[Enum(ColorWriteMask)]
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_Crest_ColorMask("Color Mask", Int) = 15
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[HideInInspector]
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_Crest_Version("Version", Integer) = 0
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}
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SubShader
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{
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ZTest Always
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ZWrite Off
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Pass
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{
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Blend Off
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ColorMask [_Crest_ColorMask]
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CGPROGRAM
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#pragma vertex Vertex
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#pragma fragment Fragment
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#include "UnityCG.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/Globals.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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CBUFFER_START(CrestPerWaterInput)
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float _Crest_Weight;
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float3 _Crest_DisplacementAtInputPosition;
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CBUFFER_END
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m_CrestNameSpace
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struct Attributes
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{
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float3 positionOS : POSITION;
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};
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struct Varyings
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{
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float4 positionCS : SV_POSITION;
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float3 worldPos : TEXCOORD0;
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};
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Varyings Vertex(Attributes input)
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{
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Varyings o;
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o.worldPos = mul(unity_ObjectToWorld, float4(input.positionOS, 1.0)).xyz;
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// Correct for displacement
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o.worldPos.xz -= _Crest_DisplacementAtInputPosition.xz;
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o.positionCS = mul(UNITY_MATRIX_VP, float4(o.worldPos, 1.0));
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return o;
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}
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half4 Fragment(Varyings input)
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{
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half seaLevelOffset = Cascade::MakeLevel(_Crest_LodIndex).SampleLevel(input.worldPos.xz);
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// Write displacement to get from sea level of water to the y value of this geometry
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float height = input.worldPos.y - g_Crest_WaterCenter.y - seaLevelOffset;
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return half4(0.0, _Crest_Weight * height, 0.0, 0.0);
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}
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m_CrestNameSpaceEnd
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m_CrestVertex
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m_CrestFragment(half4)
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ENDCG
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}
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}
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CustomEditor "WaveHarmonic.Crest.Editor.CustomShaderGUI"
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}
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