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| genpyr - generate a RADIANCE description of a square based pyramid |
| genpyr mat name s show_type xsize ysize zsize [opt] [taper angle] |
| Genpyr produces a RADIANCE scene description of a square based pyramid. This function allows to create almost any square based pyramid represented as a surfaces or as wireframe. The user has to define the lenght, width and height of the pyramid in order to get a "basic centered" pyramid. Although he can also define the "justification" of the upper vertex, by saying, for instance, TL for top-left location. Also he can define the tapper angle of the inclined surfaces. In this case he can get a truncated pyramid. |
| The options are for the show_type are: |
| -i --> normal pointing inside, |
| -o --> normal pointing outside, |
| -w --> wireframe |
| radius : When show_type is -w (wire frame) this option must get a value greater than 0. In show_type -i or -o (surface) radius value is irrelevant, however you must give any (0). |
| The options are for the placement of the top base: |
| tl, tc, tr: top left, center, right |
| bl, bc, br: bottom left, center, right |
| cl, cc, cr: center left, center, right |
| The taper angle allows create tapered pyramids. The value must: lie between 0 and 90 (0 --> vertical, 90 --> horizontal. |
| To create a wire framed pyramid of 8 X units and 8 Y units with a height of 6 Z units centered at the top, and with a tapper angle of 30 degrees (the radius of each pole is 0.2 units), write: |
| genpyr red_plastic pyr1 s -w 0.2 8 8 6 cc 30 |
| Abraham Yezioro |
| Remember to specify the "s" parameter after the name. It is for future development of this finction. The data input must be entered in the order specifyed in the synopsis. |
| xform(1) |