Function noiseRingHSV16

src/fl/gfx/noise/noise.cpp.hpp:27–49

Ring noise functions - sample three z-slices for independent component evolution

/// Ring noise functions - sample three z-slices for independent component evolution
HSV16 noiseRingHSV16(float angle, u32 time, float radius) {
  // Convert angle to cartesian coordinates
  float x = fl::cosf(angle);
  float y = fl::sinf(angle);

  // Map sin/cos values from [-1, 1] to [0, 0xFFFF]
  // This ensures positive values for uint32_t conversion
  u32 nx = static_cast<u32>((x + 1.0f) * 0.5f * radius * 0xffff);
  u32 ny = static_cast<u32>((y + 1.0f) * 0.5f * radius * 0xffff);

  // Sample three different z-slices for H, S, V components
  // Using offsets 0x0, 0x10000, 0x20000 to separate them in noise space
  u16 h_raw = inoise16(nx, ny, time);
  u16 s_raw = inoise16(nx, ny, time + 0x10000);
  u16 v_raw = inoise16(nx, ny, time + 0x20000);

  // Rescale from observed noise range to full 0-65535 range using global extents
  u16 h = rescaleNoiseValue16(h_raw);
  u16 s = rescaleNoiseValue16(s_raw);
  u16 v = rescaleNoiseValue16(v_raw);

  return HSV16(h, s, v);
}

CHSV noiseRingHSV8(float angle, u32 time, float radius) {
  fl::HSV16 hsv16 = noiseRingHSV16(angle, time, radius);