gistfile1.txt

#include "shaders_common.h"

static const char* stock_fragment_xmb_snow = GLSL(
   uniform float time;
   uniform vec2 OutputSize;

   void main(void)
   {
      float speed = time * 2;
      vec2 uv = -1.0 + 2.0*gl_FragCoord.xy / OutputSize.xy;
      uv.x *=  OutputSize.x / OutputSize.y;
      vec3 color = vec3(0.0);

      for( int i=0; i < 96; i++ )
      {
         float pha = sin(float(i) * 546.13 + 1.0) * 0.5 + 0.5;
         float siz = pow(sin(float(i) * 651.74 + 5.0) * 0.5 + 0.5, 4.0);
         float pox = sin(float(i) *321.55 +4.1) * OutputSize.x / OutputSize.y;
         float rad = 0.1 + 0.5 * siz + sin(pha+siz) / 4.0;
         vec2  pos = vec2(pox + sin(speed / 15. + pha + siz), - 1.0 - rad + (2.0 + 2.0 * rad) * mod(pha + 0.3 * (speed / 7.) * (0.2 + 0.8 * siz), 1.0));
         float dis = length(uv - pos);
         vec3  col = mix(vec3(0.194 * sin(speed / 6.0) + 0.3, 0.2, 0.3*pha), vec3(1.1 * sin(speed / 9.0) + 0.3, 0.2 * pha, 0.4), 0.5 + 0.5 * sin(float(i)));
         float f = length(uv - pos) / rad;
         f = sqrt(clamp(1.0 + (sin((speed)*siz) * 0.5) * f, 0.0, 1.0));
         color += col.zyx *(1.0 - smoothstep(rad * 0.15, rad, dis));
      }
      color *= sqrt(1.5 - 0.5 * length(uv));
      gl_FragColor = vec4(color.r, color.g, color.b , 1);
   }

);