GPMG3 - Marker Grid 3

Purpose

Use GPMG3 to insert a Marker Grid 3 structure element into the open structure following the element pointer or to replace the element pointed at by the element pointer with a Marker Grid 3 structure element depending on the current edit mode.

When encountered during structure traversal, this element generates a grid of markers in the plane defined by point, refv1, refv2 Each grid location is defined by the following parametric equation and is subject to all transformations and clipping.

Each position on the grid is defined by the following parametric vector equation:

P(i,j) = P₀ + iV₁ + jV ₂

i_min <= i <= i_max
i_min <= j <= j_max

Polymarker attributes are applied to this primitive.

GPMG3 is identified as GDP 1020.

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 also the workstation description in The graPHIGS Programming Interface: Technical Reference

Parameters