MGED CMD nmg collapse



nmg_collapse old_nmg_shape new_nmg_shape maximum_error_dist [minimum_angle]


Valid BRL-CAD NMG Primitive
Name for new NMG Primitive
Max Error value used for edge deletion.
Minimum edge angle value used for edge deletion.

Return Value(s)

No Return Values for this command.


The "nmg_collapse" command simplifies an existing nmg_shape by a process of edge decimation. Each edge in the old_nmg_shape is considered; if it can be deleted without creating an error greater than the specified maximum_error_dist, then that edge is deleted. If a minimum_angle is specified (degrees), then the edge will not be deleted if it would create a triangle with an angle less than minimum_angle. The resulting shape is saved in new_nmg_shape. The old_nmg_shape must have been triangulated previous to using the nmg_collpase command. The resulting shape consists of all triangular faces.


mged> nmg_collapse nmg_old nmg_new 1.0 10.0
Decimate edges in nmg_old to produce an NMG with an error no greater than 1.0 units. The process will not create any triangles with an angle less than 10˚. The new NMG shape will be named nmg_new.

See Also


Page Generated by David Loman on: 10/11/2007 at: 1:54:28 PM