GPSPH - Polysphere

Purpose

Use GPSPH to insert a Polysphere structure element into the open structure following the element pointer or to replace the element pointed at by the element pointer with a Polysphere structure element depending on the current edit mode.

When encountered during structure traversal, this element generates a sphere or a sequence of spheres each defined by a center point and a radius in Modelling Coordinates (MC) Each sphere is subject to all transformations and clipping.

All polygon interior and surface attributes are applied to this primitive.

Since the sphere has no defined boundary or edge, edge attributes do not apply to this primitive (i.e. 1=HOLLOW and 5=EMPTY have no visual effect) Highlight color and pick echo for 1=HOLLOW and 5=EMPTY which normally are applied to edges, are applied in a workstation dependent manner (i.e., highlight color and pick echo may be applied to tessellation lines)

GPSPH is identified as GDP 1046.

Note:

Not all GDPs are supported on all workstations. Use the Inquire List of Generalized Drawing Primitives (GPQGD) subroutine to determine the GDPs supported by an opened workstation. See the workstation description in The graPHIGS Programming Interface: Technical Reference

Parameters