ipen[j] | --------+----------------------------------------------------------- = 2 | coordinate set j is connected by a line segment to j-1 = 3 | coordinate set j is not connected to j-1 =20 | a point is plotted at coordinate set j < 0 | a gplot symbol |ipen[j]| is plotted at coordinate set j When drawing symbols, the size of the symbols can be controlled with the SET CHARSZ command before entering the 3DPLOT command, and changed inside the command by using the Z key.
If drawing line segments, colr[j] is the colour code for the last line segment j-1 to j (the first colour code is ignored). If drawing a point at the j_th coordinate, i.e., ipen[j]=20, or if drawing a symbol at the j_th coordinate, i.e., ipen[j]<0, then colr[j] is the colour of that point or symbol.
The menu of control keys: < rotate left 1 angle increment L rotate left 360 degrees > rotate right 1 angle increment R rotate right 360 degrees ^ rotate up 1 angle increment U rotate up 360 degrees V rotate down 1 angle increment D rotate down 360 degrees I zoom in O zoom out A angle increment E eye to object distance H axis number height Z symbol size S save for hardcopy M display this menu Q quit On X Window type monitors, the keyboard focus must be in the alphanumeric terminal window to use the menu.
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