An abstract W3Kit base class for 3D rendering via MinneGraphics. This class adds to W3MinneGraphics the ability to compute and render a mouse-picked selection.
The "essential state" includes some of the info about the selection. This saved selection info is maintained in world coords.
- selectMousePoint:(const Point2 *)click ofGeom:(Geom *)geom withTransform:(Transform)geomToWorld; - unselect;Some convenience methods are provided to use the selection for motion and drawing.
- lookTowardSelection; - incrementalLookTowardSelection:(double)frac; - renderSelectionCursorRelativeToGeom:(Geom *)geom withTransform:(Transform)geomToWorld;
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Author: Paul Burchard
Comments to: email@example.com
Created: Apr 18 1994 --- Last modified: Jun 18 1996