Mapdl.rdec(option='', reduc='', nplace='', **kwargs)

Defines the decimation parameters.

APDL Command: RDEC

  • option

    Command options:

    DEFINE - Defines the decimation parameters (default).

    STAT - Shows the status/listing. Other command options are ignored.

  • reduc – Approximate reduction in the number of surface elements. Valid range is from 0.0 (no decimation, the default) to 1.0. This number is a factor applied to the initial number of element radiosity surfaces.

  • nplace

    Node placement algorithm

    OPTI - Optimal placement. An edge is collapsed by moving

    both nodes (I and J in the figure below) to a new location.

    SUBS - Subset placement. An edge is collapsed by moving

    one node to another one. In the figure below, node I is moved to node J.


Decimation is the process of simplifying a fine surface mesh into a coarse one. This process is accomplished by a sequence of edge collapses.

The maximum degree of decimation (1.0) is unreachable. The real degree of decimation is always less than 1.0 because the decimated mesh must always consist of at least one element.