15.64.59.4 DISTANCE,SCRD,RDIST

- DISTANCE=nnn Distance from CENTER to the EYE (Default:35in.) SCRD=nnn Distance from screen or viewing window to EYE. (Default:-18in.) RDISTANCE=nnn Same as distance, but the SCRD is changed also to keep the view the same. (Relative distance) If SCRD is negative then the actual SCRD is adjusted so that the view is the same independent of the current window size. If |SCRD| = 0.5*DISTANCE then the plot will fill the current window. Essentially the SCRD is the distance from you to the screen, and DISTANCE is the distance to the object being viewed. The ratio of SCRD/DISTANCE determines the plot size while the absolute distance determines the perspective of the plot. Large distances produce essentially a parallel projection. If you wish to modify the plot size use the MAGNIFY or REDUCE option. Sometimes vertical lines are treated as being hidden when in fact they are visible. This may be corrected by moving the view point far from the screen. To set a distant viewpoint: TD:SET THREE RDIST=8000 RDIST adjusts the viewpoint without changing the size of the resulting plot.