Unity ShaderLab： 2D/3D Wave Flag Shader（飘动旗帜）的实现

来源：互联网发布：惠普游戏本知乎编辑：程序博客网时间：2024/05/01 22:49

个人实现的第一个在实际项目中使用的shader。

2D Wave Flag Shader
效果图：

Shader "Custom/WaveFlag2D"{Properties{    _Color ("Main Color", Color) = (1,1,1,1)    _MainTex ("Texture", 2D) = "white" { }    _WaveX ("Wave x", Range(0, 1))  = 0.1    _WaveZ ("Wave z", Range(0, 1)) = 0.1    _WindSpeed("Wind Speed", Range(50,200)) = 100}SubShader{    Pass    {        CULL Off        CGPROGRAM        #pragma vertex vert        #pragma fragment frag        #include "UnityCG.cginc"        #include "AutoLight.cginc"        float4 _Color;        sampler2D _MainTex;        fixed _WaveX;        fixed _WaveZ;        float _WindSpeed;        struct a2v {            float4 vertex : POSITION;            float4 texcoord : TEXCOORD0;        };        struct v2f {            float4 pos : POSITION;            float2 uv: TEXCOORD0;        };        v2f vert (a2v v) {            v2f o;            float angle= _Time * _WindSpeed;            if(v.vertex.x < 5)            {                v.vertex.z = v.vertex.z + sin(v.vertex.x + angle) * _WaveX ;                v.vertex.x = v.vertex.x + sin(v.vertex.z + angle) * _WaveZ;            }            v.vertex.z -=  (v.vertex.x) * 0.4;            o.pos = mul( UNITY_MATRIX_MVP, v.vertex );            o.uv = v.texcoord;            return o;        }        float4 frag (v2f i) : COLOR        {            half4 color = saturate(tex2D(_MainTex, i.uv)) * 0.8;            return color;        }        ENDCG    }}Fallback "VertexLit"}

3D Wave Flag Shader
效果图：

Shader "Custom/WaveFlag3D"{Properties{    _Color ("Main Color", Color) = (1,1,1,1)    _MainTex ("Texture", 2D) = "white" { }    _WaveY ("Wave y", Range(0, 1))  = 0.1    _WindSpeed("Wind Speed", Range(50,200)) = 100}SubShader{    Pass    {        CULL Off        CGPROGRAM        #pragma vertex vert        #pragma fragment frag        #include "UnityCG.cginc"        #include "AutoLight.cginc"        float4 _Color;        sampler2D _MainTex;        fixed _WaveY;        float _WindSpeed;        struct a2v {            float4 vertex : POSITION;            float4 texcoord : TEXCOORD0;        };        struct v2f {            float4 pos : POSITION;            float2 uv: TEXCOORD0;        };        v2f vert (a2v v) {            v2f o;            float angle= _Time * _WindSpeed;            if(v.vertex.z < 5)            v.vertex.y = v.vertex.y + sin(v.vertex.z + v.vertex.x + angle) * _WaveY;            v.vertex.x = v.vertex.x  + v.vertex.z * 0.4;            o.pos = mul( UNITY_MATRIX_MVP, v.vertex );            o.uv = v.texcoord;            return o;        }        float4 frag (v2f i) : COLOR        {            half4 color = saturate(tex2D(_MainTex, i.uv.xy));            return color;        }        ENDCG    }}Fallback "VertexLit"}

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