a data moshing effect in Unity3D

DataMosh.shader

Shader "Hidden/DataMosh"{
  Properties{
    _MainTex ("Main Texture", 2D) = "white"{}
  }
  CGINCLUDE
  #include "Unity3D.cginc"
  float3 HCLtoRGB(in float3 HCL)
  {
    float3 RGB = 0;
    if (HCL.z != 0)
    {
      float H = HCL.x;
      float C = HCL.y;
      float L = HCL.z * HCLmaxL;
      float Q = exp((1 - C / (2 * L)) * (HCLgamma / HCLy0));
      float U = (2 * L - C) / (2 * Q - 1);
      float V = C / Q;
      float A = (H + min(frac(2 * H) / 4, frac(-2 * H) / 8)) * PI * 2;
      float T;
      H *= 6;
      if (H <= 0.999)
      {
        T = tan(A);
        RGB.r = 1;
        RGB.g = T / (1 + T);
      }
      else if (H <= 1.001)
      {
        RGB.r = 1;
        RGB.g = 1;
      }
      else if (H <= 2)
      {
        T = tan(A);
        RGB.r = (1 + T) / T;
        RGB.g = 1;
      }
      else if (H <= 3)
      {
        T = tan(A);
        RGB.g = 1;
        RGB.b = 1 + T;
      }
      else if (H <= 3.999)
      {
        T = tan(A);
        RGB.g = 1 / (1 + T);
        RGB.b = 1;
      }
      else if (H <= 4.001)
      {
        RGB.g = 0;
        RGB.b = 1;
      }
      else if (H <= 5)
      {
        T = tan(A);
        RGB.r = -1 / T;
        RGB.b = 1;
      }
      else
      {
        T = tan(A);
        RGB.r = 1;
        RGB.b = -T;
      }
      RGB = RGB * V + U;
    }
    return RGB;
  }
  float3 RGBtoHSV(in float3 RGB)
  {
    float3 HCV = RGBtoHCV(RGB);
    float S = HCV.y / (HCV.z + Epsilon);
    return float3(HCV.x, S, HCV.z);
  }
  sampler2D _MainTex;
  float4 frag(v2f_img i){
    float3 h = RGBtoHSV(tex2D(_MainTex, i.uv).rgb);
    float a = h.r + atan(i.uv.y,i.uv.x) + _Time.y * 0.1;
    float2x2 mat = float2x2(a,-a,a,a);
    float4 color = tex2D(_MainTex, uv + mat * float2(log((_Time.y* 0.7)-0.2*0.2 +1),0) * hsv.y);
    return color;
  }
  ENDCG
  SubShader{
  #pragma target 3.0
  #pragma vertex vert_img
  #pragma fragment frag
  }
}