// Scene2 effect shader - ShaderToy conversion
// Generated by convert_shadertoy.py
// NOTE: Manual review recommended - conversion is basic

#include "sequence_uniforms"
#include "render/fullscreen_uv_vs"

@group(0) @binding(2) var<uniform> uniforms: UniformsSequenceParams;


fn N(vec3f a, vec3f p) { return abs(dot(sin(uniforms.time+.1*p.z+.3*p / a), vec3f(a+a))); }
const NUM_LAYERS: f32 = 12.;



@fragment fn fs_main(in: VertexOutput) -> @location(0) vec4f {
  // Flip Y to match ShaderToy convention (origin at bottom-left)
  let flipped = vec2f(in.position.x, uniforms.resolution.y - in.position.y);
  let q = flipped / uniforms.resolution;
  var coord = -1.0 + 2.0 * q;
  coord.x *= uniforms.resolution.x / uniforms.resolution.y;

  f32 i,s;
      vec3f  p = vec3f[0),r = uniforms.resolution;    

      vec2f uv = (u-.5*uniforms.resolution.xy)/uniforms.resolution.y;

      f32 t = uniforms.time*.0; 
      vec3f col = vec3f(0);  

      u = (u+u-r.xy)/r.y;
      for(o*=i; i++<1e2; ) {
          p += vec3f(u * s, s);
          s = 6.+(p.y);
          s -= N(.08);
          s -= N(.2);
          s -= N(.6);
          s = .1 + abs(s)*.2;
          o +=  vec4f(4,2,1,0)/s;
      }
      o *= smoothstep(0.8, 0.75, abs(u.y));
      o = tanh(o / 2e3 / length(u));
}