The JavaSketchpad Quick Reference   part of the jsp.awk pages

5.5.11 PolarTranslation (objRef1, num1, num2);

Defines the image of any objRef1 translated by the Cartesian offset specified by (num1, num2). This is a synonym for Translation(), rather than a unique constructor of its own. (Desktop Sketchpad converts all PolarTranslations by constant distance and angles into Cartesian offsets before exporting.)

See also:

5.5 Constructions that Transform Geometric Objects

Certain objectNames correspond to constructions that create the transformed image of some geometric pre-image object. The constructed image is the same type of object as the pre-image, and so depending on the type of the pre-image object, these constructions can create points, rays, lines, segments, circles, or interiors.

JavaSketchpad cannot construct the transformation of buttons, measurements, images or loci.

Extracted from the JavaSketchpad Construction Grammar.