95 lines
3.1 KiB
Plaintext
95 lines
3.1 KiB
Plaintext
Shader "IndianOcean/AbyssGlowParticle"
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{
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// 深渊荧光粒子 Shader
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// 加法混合 + Queue 3200（在 DarknessOverlay 的 3100 之后渲染）
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// 不受乘法黑暗遮罩影响，在纯黑虚空中也能发光
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// 程序化软圆点，不需要贴图
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//
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// 使用方式：
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// 1. 创建材质，选此 shader
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// 2. 材质赋给 ParticleSystem 的 Renderer > Material
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// 3. 粒子贴图留空（程序化圆点），用 Vertex Color 控制颜色/透明度
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Properties
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{
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_Color ("颜色", Color) = (1.0, 0.85, 0.4, 1.0)
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_Softness ("柔和度（边缘渐变宽度）", Range(0.01, 1.0)) = 0.5
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_Intensity ("亮度倍数", Range(0.1, 5.0)) = 1.0
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}
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SubShader
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{
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Tags
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{
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"RenderType" = "Transparent"
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"Queue" = "Transparent+200"
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"RenderPipeline" = "UniversalPipeline"
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}
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// alpha 加法混合：finalColor = src.rgb * src.a + dst.rgb
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// 粒子在黑暗遮罩之后渲染，直接往画面上加光
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Blend SrcAlpha One
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ZWrite Off
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ZTest LEqual
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Cull Off
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Pass
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{
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Name "AbyssGlow"
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HLSLPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#pragma multi_compile_instancing
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#include "Packages/com.unity.render-pipelines.universal/ShaderLibrary/Core.hlsl"
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struct Attributes
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{
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float4 positionOS : POSITION;
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float2 uv : TEXCOORD0;
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float4 color : COLOR; // 粒子系统顶点色（含生命周期 alpha）
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UNITY_VERTEX_INPUT_INSTANCE_ID
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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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float4 color : COLOR;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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CBUFFER_START(UnityPerMaterial)
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float4 _Color;
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float _Softness;
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float _Intensity;
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CBUFFER_END
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Varyings vert(Attributes input)
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{
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Varyings output;
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UNITY_SETUP_INSTANCE_ID(input);
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UNITY_TRANSFER_INSTANCE_ID(input, output);
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output.positionCS = TransformObjectToHClip(input.positionOS.xyz);
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output.uv = input.uv;
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output.color = input.color;
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return output;
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}
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half4 frag(Varyings input) : SV_Target
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{
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// 程序化软圆点：UV 中心 (0.5,0.5) 到边缘的距离
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float2 center = float2(0.5, 0.5);
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float dist = distance(input.uv, center);
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float softCircle = 1.0 - smoothstep(_Softness * 0.5, 0.5, dist);
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softCircle = max(0.0, softCircle);
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// 颜色 = 材质色 × 粒子顶点色 × 亮度 × 软圆形状
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float3 col = _Color.rgb * input.color.rgb * _Intensity;
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float alpha = softCircle * input.color.a;
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return half4(col, alpha);
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}
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ENDHLSL
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}
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}
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FallBack Off
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}
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