code snippet (20250417)

  // if(p.x > .5 || p.y > .5) col.r = .8;
  if(max(p.x, p.y) > .5) col.r = .8;
  // col.r = step(.5, max(p.x, p.y));

  float a = radians(45.);
  vec2 n = vec2(sin(a), cos(a));
  float d = dot(uv, n);
  d = abs(d);
  col += smoothstep(fwidth(d), 0., d-.001);