5.1.12 Sphere-Sweep

Another object that can be used to model smooth transitions between different spheres is the sphere sweep object. Its syntax is:

SPHERE_SWEEP:
  sphere_sweep { SWEEP_SPLINE_TYPE NUM_SPHERES, SPHERE_ITEM, ... , 
    SPHERE_ITEM [tolerance F_DEPTH_TOLERANCE] [OBJECT_MODIFIERS] }

SWEEP_SPLINE_TYPE:
  linear_spline | b_spline | cubic_spline

SPHERE_ITEM:
  CENTER, RADIUS

See also:

• [pov:6.5.1.10]Spheresweep
• [pov:3.4.4]Sphere Sweep Object

This describes a union of spheres whose centers are formed by the spline through the centers of the SPHERE_ITEM's and the radii are given by the values given by the spline through the radii of the SPHERE_ITEM's.

Figure: Sphere-sweep objects