旗帜飘扬的Shader

利用顶点变化

Shader "A/B"
{
Properties{
_MainTex ("tu" ,2D) = "white" {}

}

SubShader{
    Tags{"RenderType"="Opaque"}
    LOD 100
    blend SrcAlpha OneMinusSrcAlpha

    Pass{
        CGPROGRAM
        #pragma vertex vert
        #pragma fragment frag
        #include "UnityCG.cginc"

        struct v2f{
            fixed4 mVert:POSITION;
            fixed4 mTex:TEXCOORD0;
        };
        
        sampler2D _MainTex;

        float f1;
        float f2;
        float f3;

        v2f vert(appdata_base v):POSITION{
            v2f o;
            o.mTex=v.texcoord;
            v.texcoord.x/=5;
            f1 += _Time.y;
            f2 = f1 % 5;
            f3 = floor(f1/5);
            if(f2<1)
                v.texcoord.x += f3 * 0.2  + f2/5;
            else
                v.texcoord.x += (f3+1) * 0.2;
            
            if (v.vertex.x < 4) 

v.vertex.y += (sin(f1 * 8 + v.vertex.x) * 2 + sin(f1 * 4 + v.vertex.z)) / 4;

            o.mVert= UnityObjectToClipPos(v.vertex);
            o.mTex=v.texcoord;
            return o;
        }

        fixed4 frag (v2f aa):COLOR{
            return tex2D(_MainTex,aa.mTex);
        }
        ENDCG
    }


}

}