noiseSphereHSV16()

HSV16 fl::noiseSphereHSV16	(	float	angle,
		float	phi,
		u32	time,
		float	radius = 1.0f )

Sphere noise functions - sample three z-slices for independent component evolution.

Generate HSV16 noise for a sphere pattern.

Samples three z-slices of 3D Perlin noise (at time, time+0x10000, time+0x20000) to create independent hue, saturation, and value components.

Parameters

angle	Azimuth angle around the sphere (radians, 0 to 2π)
phi	Polar angle from the north pole (radians, 0 to π)
time	Animation time parameter
radius	Noise zoom level (level of detail). Larger values = coarser pattern, smaller = more detail (default 1.0)

Returns

HSV16 color with 16-bit components

Definition at line 94 of file noise.cpp.hpp.

                                                                       {
  // Convert spherical coordinates to cartesian
  // angle: azimuth (0 to 2π), phi: polar angle from north pole (0 to π)
  // x = sin(phi) * cos(angle)
  // y = sin(phi) * sin(angle)
  // z = cos(phi)
  float sin_phi = fl::sinf(phi);
  float cos_phi = fl::cosf(phi);
  float x = sin_phi * fl::cosf(angle);
  float y = sin_phi * fl::sinf(angle);
  float z = cos_phi;
 
  // Map cartesian 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);
  u32 nz = static_cast<u32>((z + 1.0f) * 0.5f * radius * 0xffff);
 
  // Sample three different t-slices for H, S, V components
  // Using offsets 0x0, 0x10000, 0x20000 to separate them in noise space
  u16 h = inoise16(nx, ny, nz, time);
  u16 s = inoise16(nx, ny, nz, time + 0x10000);
  u16 v = inoise16(nx, ny, nz, time + 0x20000);
 
  return HSV16(h, s, v);
}

References cosf(), inoise16(), sinf(), time(), x, y, and z.

Referenced by noiseSphereHSV8().

Here is the call graph for this function:

Here is the caller graph for this function: