75 lines
2.2 KiB
Plaintext
75 lines
2.2 KiB
Plaintext
// Crest Water System
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// Copyright © 2024 Wave Harmonic. All rights reserved.
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// This sets base water height to Y value of geometry.
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Shader "Crest/Inputs/Level/Water Level From Geometry"
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{
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Properties
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{
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[Enum(UnityEngine.Rendering.BlendMode)] _Crest_BlendSource("Source Blend Mode", Int) = 1
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[Enum(UnityEngine.Rendering.BlendMode)] _Crest_BlendTarget("Target Blend Mode", Int) = 0
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[Enum(UnityEngine.Rendering.BlendOp)] _Crest_BlendOperation("Blend Operation", Int) = 0
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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 [_Crest_BlendSource] [_Crest_BlendTarget]
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BlendOp [_Crest_BlendOperation]
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CGPROGRAM
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#pragma vertex Vert
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#pragma fragment Frag
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#include "UnityCG.cginc"
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#include "Packages/com.waveharmonic.crest/Runtime/Shaders/Library/Globals.hlsl"
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CBUFFER_START(CrestPerWaterInput)
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float3 _Crest_DisplacementAtInputPosition;
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half _Crest_Weight;
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CBUFFER_END
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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 Vert(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 Frag(Varyings input) : SV_Target
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{
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// Write displacement to get from sea level of water to the y value of this geometry
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const float heightOffset = input.worldPos.y - g_Crest_WaterCenter.y;
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return heightOffset * _Crest_Weight;
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}
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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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