In [Bifrost 92] pp. 78, a detailed description of how the picture is supposed to support graphics modelling can be found. Currently only one form of the graphics modelling properties are implemented, that is, a constraining picture called SelectionPicture.
The SelectionPicture specializes the Add and Delete operations. When two or more graphical objects are selected the Hilite and UnHilite operations of the graphical objects are changed from HiliteControls to HiliteOutline. Graphical objects then become highlighted by drawing the outlines of the shapes instead of highlighted control points. This effect is similar to many graphical editors, e.g. the classical Macintosh program MacDraw.
|The Bifrost Graphics System - Reference Manual||© 1991-2004 Mjølner Informatics||
[Modified: Thursday October 5th 2000 at 17:17]