111 lines
3.2 KiB
Plaintext
111 lines
3.2 KiB
Plaintext
// Crest Water System
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// Copyright © 2024 Wave Harmonic. All rights reserved.
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Shader "Crest/Inputs/Flow/Add From Texture"
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{
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Properties
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{
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[MainTexture] _Crest_Texture("Flow Map", 2D) = "white" {}
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_Crest_Strength( "Strength", float ) = 1
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[Toggle(d_FlipX)]
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_Crest_FlipX("Flip X", Float) = 0
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[Toggle(d_FlipZ)]
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_Crest_FlipZ("Flip Z", Float) = 0
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[Toggle(d_NegativeValues)]
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_Crest_NegativeValues("Has Negative Values", Float) = 0
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[Toggle(d_Feather)]
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_Crest_Feather("Feather At UV Extents", Float) = 0
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_Crest_FeatherWidth("Feather Width", Range(0.001, 0.5)) = 0.1
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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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Blend One One
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Pass
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{
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CGPROGRAM
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#pragma vertex Vert
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#pragma fragment Frag
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#pragma shader_feature_local d_FlipX
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#pragma shader_feature_local d_FlipZ
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#pragma shader_feature_local d_Feather
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#pragma shader_feature_local d_NegativeValues
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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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#include "Packages/com.waveharmonic.crest/Runtime/Shaders/Library/InputsDriven.hlsl"
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#include "Packages/com.waveharmonic.crest/Runtime/Shaders/Library/Helpers.hlsl"
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Texture2D _Crest_Texture;
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SamplerState sampler_Crest_Texture;
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CBUFFER_START(CrestPerWaterInput)
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float4 _Crest_Texture_ST;
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float _Crest_Strength;
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float _Crest_Weight;
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float3 _Crest_DisplacementAtInputPosition;
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half _Crest_FeatherWidth;
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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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float2 uv : TEXCOORD0;
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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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float2 uv : 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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float3 worldPos = mul(unity_ObjectToWorld, float4(input.positionOS, 1.0)).xyz;
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// Correct for displacement
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worldPos.xz -= _Crest_DisplacementAtInputPosition.xz;
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o.positionCS = mul(UNITY_MATRIX_VP, float4(worldPos, 1.0));
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o.uv = TRANSFORM_TEX(input.uv, _Crest_Texture);
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return o;
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}
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float4 Frag(Varyings input) : SV_Target
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{
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float2 flow = _Crest_Texture.Sample(sampler_Crest_Texture, input.uv).xy;
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#if !d_NegativeValues
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// From 0..1 to -1..1.
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flow = flow * 2.0 - 1.0;
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#endif
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#if d_Feather
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flow *= WaveHarmonic::Crest::FeatherWeightFromUV(input.uv, _Crest_FeatherWidth);
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#endif
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#if d_FlipX
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flow.x *= -1.0;
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#endif
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#if d_FlipZ
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flow.y *= -1.0;
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#endif
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return float4(flow * _Crest_Strength * _Crest_Weight, 0.0, 0.0);
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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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