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7.2.17 camera-prop

(camera-prop { geometry object } [projective])
Specify the object to be shown when drawing other cameras. By default, this object is drawn with its origin at the camera, and with the camera looking toward the object's -Z axis. With the projective keyword, the camera's viewing projection is also applied to the object; this places the object's Z=-1 and Z=+1 at near and far clipping planes, with the viewing area -1<={X,Y}<=+1. Example: (camera-prop { < cube } projective)