text 缲り返し四角アニメーション

Posted 2021-05-02

Shader "Test"
 {
     Properties{}
     CGINCLUDE
     #include "UnityCG.cginc"
     
     #define PI 3.14159265359
     
     float box (float2 st, float size)
     {
        size = 0.5 +size * 0.5;
        st = step(st, size) * step(1 - st, size);
        return st.x*st.y;
     }
 
     float4 frag(v2f_img i) : SV_Target
     {
        return box(frac(i.uv*10), abs(sin(_Time.y*3)));
     }
 
     ENDCG
     SubShader
     {
         Pass
         {
             CGPROGRAM
             #pragma vertex vert_img
             #pragma fragment frag
             ENDCG
         }
     }
 }