本文实例为大家分享了Unity3D Shader实现流光效果的具体代码,供大家参考,具体内容如下
流光效果图:
演示工程:下载地址
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//功能需求:模拟数据传送效果,高亮色块从模型上方移动到下方 //功能分析:这里采用UV动画的方式来实现,利用Alpha贴图控制流动的形状 // 利用Alpha遮罩贴图,控制模型中哪些地方需要进行流动 Shader "Custom/DataFlowEffect" { Properties { _MainColor( "Main Color" ,Color) = (1,1,1,1) _MainTex( "Main Texture" ,2D) = "white" {} _Specular( "Specular" ,Color) = (1,1,1,1) _Gloss( "Gloss" ,Range(0,255)) = 20.0 _FlowTex( "Flow Tex (A)" ,2D) = "black" {} _FlowColor( "Flow Color (RGBA)" ,Color)=(1,1,1,1) _FlowIdleTime( "FlowInternal" ,Range(0,10))=1.0 _FlowDuring( "FlowDuring" ,Range(0,10))=1.0 _FlowMaskTex( "FlowMasking (A)" ,2D)= "white" {} _FlowDirection( "FlowDirection" ,Int)= 0 _FlowBeginTime( "Flow Begin Time" ,Float)=0 } SubShader { Tags{ "RenderType" = "Opaque" "Queue" = "Geometry" } Pass { Tags{ "LightMode" = "ForwardBase" } Blend SrcAlpha OneMinusSrcAlpha CGPROGRAM #pragma vertex vert #pragma fragment frag #include "UnityCG.cginc" #include "Lighting.cginc" sampler2D _MainTex; //颜色贴图 half4 _MainTex_ST; //颜色UV 缩放和偏移 fixed3 _MainColor; //漫反射颜色 fixed3 _Specular; //高光颜色 fixed _Gloss; //高光度 sampler2D _FlowTex; //数据流图片 fixed4 _FlowColor; //数据流颜色叠加 half4 _FlowTex_ST; //数据流贴图UV的缩放和偏移 fixed _FlowIdleTime; //流动动画间歇时间 fixed _FlowDuring; //流动动画播放时间 sampler2D _FlowMaskTex; //流动遮罩 fixed _FlowDirection; //流动方向 float _FlowBeginTime; //流动效果开始的时间 struct a2v { half4 pos: POSITION; half3 normal :NORMAL; half4 texcoord : TEXCOORD0; }; struct v2f { half4 position : SV_POSITION; half2 uv : TEXCOORD0; half3 worldNormal : TEXCOORD1; half3 worldPos : TEXCOORD2; half2 flowUV : TEXCOORD3; }; v2f vert(a2v i) { v2f v; v.position = UnityObjectToClipPos(i.pos); v.uv = i.texcoord * _MainTex_ST.xy + _MainTex_ST.zw; v.worldNormal = mul(unity_ObjectToWorld,i.normal); v.worldPos = mul(unity_ObjectToWorld,i.pos); v.flowUV = i.texcoord * _FlowTex_ST.xy + _FlowTex_ST.zw; return v; } //uv - vert的uv坐标 //scale - 贴图缩放 //idleTime - 每次循环开始后多长时间,开始流动 //loopTime - 单次流动时间 fixed4 getFlowColor(half2 uv, int scale, fixed idleTime, fixed loopTime) { //当前运行时间 half flowTime_ = _Time.y - _FlowBeginTime; //上一次循环开始,到本次循环开始的时间间隔 half internal = idleTime + loopTime; //当前循环执行时间 half curLoopTime = fmod(flowTime_, internal ); //每次开始流动之前,有个停止间隔,检测是否可以流动了 if (curLoopTime > idleTime) { //已经流动时间 half actionTime = curLoopTime - idleTime; //流动进度百分比 half actionPercentage = actionTime / loopTime; half length = 1.0 / scale; //从下往上流动 //计算方式:设:y = ax + b,其中y为下边界值,x为流动进度 //根据我们要求可以,x=0时y=-length;x=1时y=1;带入解方程 half bottomBorder = actionPercentage * (1+length) - length; half topBorder = bottomBorder + length; //从上往下流动 //求解方法与上面类似 if (_FlowDirection < 0) { topBorder = (-1-length) * actionPercentage + 1 + length; bottomBorder = topBorder - length; } if (uv.y < topBorder && uv.y > bottomBorder) { half y = (uv.y - bottomBorder) / length; return tex2D(_FlowTex,fixed2(uv.x,y)); } } return fixed4(1,1,1,0); } fixed4 frag(v2f v):SV_Target { //计算漫反射系数 fixed3 albedo = tex2D(_MainTex,v.uv) * _MainColor; //计算环境光 fixed3 ambient = UNITY_LIGHTMODEL_AMBIENT.xyz * albedo; fixed3 worldNormal = normalize(v.worldNormal); //世界坐标的法线方向 fixed3 worldLightDir = normalize(UnityWorldSpaceLightDir(v.worldPos)); //世界坐标的光照方向 fixed3 worldViewDir = normalize(UnityWorldSpaceViewDir(v.worldPos)); //世界坐标的视角方向 //计算漫反射颜色,采用Half-Lambert模型 fixed3 lightColor = _LightColor0.rgb; fixed3 diffuse = lightColor * albedo * max(0,0.5*dot(worldNormal,worldLightDir)+0.5); //计算高光,采用Blinn-Phone高光模型 fixed3 halfDir = normalize(worldViewDir + worldLightDir); fixed3 specColor = _Specular * lightColor * pow(max(0,dot(worldNormal,halfDir)),_Gloss); //叠加流动贴图 fixed4 flowColor = getFlowColor(v.uv,_FlowTex_ST.y,_FlowIdleTime,_FlowDuring); fixed4 flowMaskColor = tex2D(_FlowMaskTex,v.uv); //与遮罩贴图进行混合,只显示遮罩贴图不透明的部分 flowColor.a = flowMaskColor.a * flowColor.a * _FlowColor.a; fixed3 finalDiffuse = lerp(diffuse,_FlowColor,flowColor.a); return fixed4(ambient + finalDiffuse+specColor,1); } ENDCG } } Fallback "Diffuse" } |
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原文链接:https://blog.csdn.net/salvare/article/details/80354730