284 lines
12 KiB
GLSL
284 lines
12 KiB
GLSL
// UIMask：UI Mask 粒子/特效 shader —— 加色与普通混合共用一个 shader
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//
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// 混合模式在材质面板上是一个下拉框 "_BlendMode"（加色 Additive / 普通混合 AlphaBlend）。
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// 它由 Assets/Shaders/Editor/UIMaskBlendMode.cs（[UIMaskBlendMode] 绘制器）映射到真正的 Blend 状态：
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// 加色(Additive)： _SrcBlend = 5 (SrcAlpha) _DstBlend = 1 (One)
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// 普通混合(AlphaBlend)：_SrcBlend = 5 (SrcAlpha) _DstBlend = 10 (OneMinusSrcAlpha)
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// 渲染面同理：[UIMaskRenderFace] 下拉映射到隐藏属性 _Cull（双面=0，只渲染后面=1，只渲染前面=2）。
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// _SrcBlend / _DstBlend / _Cull 是隐藏属性，由下拉框自动写入，不要手动改。
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// Blend 是固定功能状态，不参与 shader 变体表，所以切换混合模式不产生额外变体。
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// 面向美术：程序/技术类参数一律用 [HideInInspector] 隐藏（混合模式内部值、Stencil 组、
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// 顶点 Mask 翻转），需要时由程序控制，材质面板只留艺术参数。
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Shader "VFX/Yeomai_VFX" {
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Properties {
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[UIMaskBlendMode] _BlendMode ("混合模式", Float) = 0
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[HideInInspector] _SrcBlend ("Src Blend", Float) = 5
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[HideInInspector] _DstBlend ("Dst Blend", Float) = 1
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[UIMaskRenderFace] _RenderFace ("渲染面", Float) = 2
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[HideInInspector] _Cull ("Cull", Float) = 0
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[HDR]_TintColor ("着色", Color) = (0.5,0.5,0.5,0.5)
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_GlowScale("发光强度", float) = 1
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_AlphaScale("透明度", float) = 1
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_MainTex ("主贴图", 2D) = "white" {}
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[Toggle] _UseUvAni("启用", Float) = 0
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_SpeedU("U 速度", Float) = 0
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_SpeedV("V 速度", Float) = 0
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[Toggle] _UseUvDistortion("启用", Float) = 0
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_UVNoiseTex("噪声贴图", 2D) = "black" {}
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_Distortion ("扰动量", Float) = 0
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_NoiseScroll ("噪声滚动 (XY 速度 / ZW 强度)", Vector) = (0,0,1,1)
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[Toggle] _UseMask("启用", Float) = 0
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[Toggle] _UseMaskUvAni("UV 滚动", Float) = 0
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_Mask("遮罩贴图", 2D) = "white" {}
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[UIMaskChannel] _MaskChannel("通道", Float) = 3
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_MaskSpeedU("U 速度", Float) = 0
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_MaskSpeedV("V 速度", Float) = 0
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[Toggle] _UseDissolve("启用", Float) = 0
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_DissolveTex ("溶解贴图", 2D) = "white" {}
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[UIMaskChannel] _DissolveChannel("通道", Float) = 3
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_Dissolve ("溶解进度", Range(0, 1.01)) = 0
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_DissolveWidth ("溶解宽度", Range(0, 1)) = 0
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// 默认黑色 = 不叠加任何颜色，保证新参数不影响原有溶解效果
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[HDR]_DissolveEdgeColor ("溶解边缘颜色", Color) = (0, 0, 0, 1)
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_DissolveEdgeSharpness ("边缘锐度 (越大越细)", Range(0.001, 8)) = 2
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// 第二层：贴边界的细亮圈（烧纸的燃烧边），同样默认黑色不影响原效果
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[HDR]_DissolveHighlightColor ("溶解边缘高亮", Color) = (0, 0, 0, 1)
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_DissolveHighlightWidth ("高亮宽度 (越小越细)", Range(0.001, 0.5)) = 0.08
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[Toggle] _UseUIMaskClip("启用", Float) = 0
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_ClipRect("裁切矩形 (由 Mask / RectMask2D 控制)", Vector) = (-1, -1, 1, 1)
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[Toggle] _UseVertexMask("启用", Float) = 0
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_VertexOffset ("方向与范围", Vector) = (0,0,1,1)
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// 程序专用：顶点 Mask 的翻转，由程序设置
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[HideInInspector] _VertexFlipX ("程序专用", Float) = 1
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// required for UI.Mask —— 这几个由 Unity 的 Mask / RectMask2D 在运行时写入，不需要美术看到
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[HideInInspector] _StencilComp("Stencil Comparison", Float) = 8
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[HideInInspector] _Stencil("Stencil ID", Float) = 0
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[HideInInspector] _StencilOp("Stencil Operation", Float) = 0
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[HideInInspector] _StencilWriteMask("Stencil Write Mask", Float) = 255
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[HideInInspector] _StencilReadMask("Stencil Read Mask", Float) = 255
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[HideInInspector] _ColorMask("Color Mask", Float) = 15
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}
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CustomEditor "UIMaskShaderGUI"
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Category {
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Tags { "Queue"="Transparent" "IgnoreProjector"="True" "RenderType"="Transparent" "PreviewType"="Plane" }
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Blend [_SrcBlend][_DstBlend]
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Cull [_Cull] Lighting Off ZWrite Off
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SubShader {
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Stencil
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{
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Ref[_Stencil]
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Comp[_StencilComp]
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Pass[_StencilOp]
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ReadMask[_StencilReadMask]
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WriteMask[_StencilWriteMask]
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}
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ColorMask[_ColorMask]
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Pass {
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CGPROGRAM
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#pragma vertex vert
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#pragma fragment frag
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#pragma target 2.0
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// 全部使用 shader_feature（按材质用到的组合裁剪），不要改成 multi_compile
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#pragma shader_feature _USEMASK_ON
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#pragma shader_feature _USEMASKUVANI_ON
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#pragma shader_feature _USEUVANI_ON
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#pragma shader_feature _USEUVDISTORTION_ON
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#pragma shader_feature _USEDISSOLVE_ON
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#pragma shader_feature _USEUIMASKCLIP_ON
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#pragma shader_feature _USEVERTEXMASK_ON
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// 不声明 multi_compile_fog：UNITY_FOG_* 宏在无雾关键字时展开为空，
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// 原来的"_UseReceiveFog"开关勾了也不会有任何效果，故已移除。
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#include "UnityCG.cginc"
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#include "UnityUI.cginc"
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sampler2D _MainTex;
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fixed4 _TintColor;
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#if _USEMASK_ON
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sampler2D _Mask;
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fixed4 _Mask_ST;
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float _MaskChannel;
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#if _USEMASKUVANI_ON
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float _MaskSpeedU;
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float _MaskSpeedV;
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#endif
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#endif
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#if _USEUVANI_ON
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float _SpeedU;
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float _SpeedV;
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#endif
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#if _USEUVDISTORTION_ON
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sampler2D _UVNoiseTex;
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fixed4 _UVNoiseTex_ST;
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fixed _Distortion;
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fixed4 _NoiseScroll;
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#endif
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#if _USEDISSOLVE_ON
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sampler2D _DissolveTex;
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fixed4 _DissolveTex_ST;
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float _DissolveChannel;
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fixed _Dissolve;
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fixed _DissolveWidth;
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fixed4 _DissolveEdgeColor;
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fixed _DissolveEdgeSharpness;
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fixed4 _DissolveHighlightColor;
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fixed _DissolveHighlightWidth;
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#endif
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// 通道选择：0=R 1=G 2=B 3=A。用点乘取通道，避免动态分量索引（SM2.0 不支持）
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inline float UIMaskSampleChannel(sampler2D tex, float2 uv, float channel)
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{
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float4 c = tex2D(tex, uv);
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float4 w = 1.0 - saturate(abs(channel - float4(0.0, 1.0, 2.0, 3.0)));
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return dot(c, w);
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}
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#if _USEUIMASKCLIP_ON
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fixed4 _ClipRect;
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#endif
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#if _USEVERTEXMASK_ON
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fixed4 _VertexOffset;
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fixed _VertexFlipX;
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#endif
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struct appdata_t {
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float4 vertex : POSITION;
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fixed4 color : COLOR;
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fixed4 texcoord : TEXCOORD0;
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UNITY_VERTEX_INPUT_INSTANCE_ID
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};
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struct v2f {
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float4 vertex : SV_POSITION;
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fixed4 color : COLOR;
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fixed4 texcoord : TEXCOORD0;
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#if _USEMASK_ON
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fixed2 texcoordMask : TEXCOORD2;
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#endif
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#if _USEUVDISTORTION_ON
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fixed2 texcoordNoise : TEXCOORD3;
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#endif
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#if _USEDISSOLVE_ON
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fixed2 texcoordDissolve: TEXCOORD4;
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#endif
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#if _USEUIMASKCLIP_ON
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fixed4 worldPosition : TEXCOORD5;
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#endif
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#if _USEVERTEXMASK_ON
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fixed4 vertex2 : TEXCOORD7;
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#endif
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UNITY_VERTEX_OUTPUT_STEREO
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};
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fixed4 _MainTex_ST;
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fixed _GlowScale;
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fixed _AlphaScale;
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v2f vert (appdata_t v)
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{
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v2f o;
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UNITY_SETUP_INSTANCE_ID(v);
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UNITY_INITIALIZE_VERTEX_OUTPUT_STEREO(o);
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o.vertex = UnityObjectToClipPos(v.vertex);
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o.color = v.color * _TintColor;
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o.texcoord.xy = TRANSFORM_TEX(v.texcoord,_MainTex);
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o.texcoord.zw = v.texcoord.zw;
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#if _USEMASK_ON
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o.texcoordMask = TRANSFORM_TEX(v.texcoord,_Mask);
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#endif
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#if _USEUVDISTORTION_ON
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o.texcoordNoise = TRANSFORM_TEX(v.texcoord,_UVNoiseTex);
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#endif
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#if _USEDISSOLVE_ON
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o.texcoordDissolve = TRANSFORM_TEX(v.texcoord,_DissolveTex);
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#endif
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#if _USEUIMASKCLIP_ON
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o.worldPosition = mul(unity_ObjectToWorld, v.vertex);
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#endif
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#if _USEVERTEXMASK_ON
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o.vertex2 = v.vertex;
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#endif
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return o;
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}
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fixed4 frag (v2f i) : SV_Target
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{
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#if _USEUVANI_ON
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// 用 _Time.y（float）而不是 _Time.g（fixed）：运行久了 fixed 精度不足会出现像素块/卡顿
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i.texcoord.xy += _Time.y * float2(_SpeedU, _SpeedV);
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#endif
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#if _USEUVDISTORTION_ON
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float2 noiseScrollXY = _NoiseScroll.xy;
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i.texcoordNoise += fixed2(_Time.g * noiseScrollXY);
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i.texcoord.xy += tex2D(_UVNoiseTex, i.texcoordNoise).xy*_Distortion*_NoiseScroll.zw;
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#endif
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fixed4 col = 2.0f * i.color * tex2D(_MainTex, i.texcoord.xy);
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col.rgb *= _GlowScale;
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col.a = saturate(col.a) * _AlphaScale;
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#if _USEMASK_ON
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#if _USEMASKUVANI_ON
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i.texcoordMask += _Time.y * float2(_MaskSpeedU, _MaskSpeedV);
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#endif
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col.a = saturate(col.a * UIMaskSampleChannel(_Mask, i.texcoordMask, _MaskChannel));
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#endif
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#if _USEDISSOLVE_ON
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fixed DissolveWithParticle =(_Dissolve*(1-i.texcoord.z)*(1+_DissolveWidth)-_DissolveWidth) ;
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fixed dissolveMap = UIMaskSampleChannel(_DissolveTex, i.texcoordDissolve, _DissolveChannel);
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fixed dissolveAlpha = saturate(smoothstep( DissolveWithParticle, (DissolveWithParticle+_DissolveWidth), dissolveMap));
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col.a *= dissolveAlpha;
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// 溶解边缘色：越靠近溶解边界越亮。已溶解区域 alpha≈0 不可见，所以视觉上就是沿着溶解轮廓的一圈颜色。
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// 做火焰时把颜色设成 HDR 橙红（用 HDR 拾色器的强度调亮），边缘就会像在燃烧。
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fixed dissolveEdge = pow(1.0 - dissolveAlpha, _DissolveEdgeSharpness);
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col.rgb += _DissolveEdgeColor.rgb * dissolveEdge;
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// 细亮圈：只在溶解边界（dissolveAlpha ≈ 0.5）附近加亮，越靠近边界越亮，
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// 宽度由 _DissolveHighlightWidth 控制；颜色用 HDR 拉高就是"烧得发白"的亮边。
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fixed highlightBand = saturate(1.0 - abs(dissolveAlpha - 0.5) / max(_DissolveHighlightWidth, 0.0001));
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col.rgb += _DissolveHighlightColor.rgb * smoothstep(0.0, 1.0, highlightBand);
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#endif
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#if _USEUIMASKCLIP_ON
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col.a *= UnityGet2DClipping(i.worldPosition.xy, _ClipRect);
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#endif
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#if _USEVERTEXMASK_ON
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col.a *= smoothstep(1, 0, ((i.vertex2.x - _VertexOffset.x) * _VertexOffset.z + (i.vertex2.y - _VertexOffset.y) * _VertexOffset.w) * _VertexFlipX);
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#endif
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return col;
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}
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ENDCG
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}
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}
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}
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}
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