QTCYL                                                              Menu: PRISM
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Creates a quarter-circle polygon or a solid quarter-circle prism
(quarter-cylinder).

        1. * (CHAR) plane of base quarter circle (x-xy, y-yz,z-zx) <x>
        2. * (POINT) center point
        3. * (NUM) radius (greater than 0)
     for option `x':
        4. * (NUM) height of prism
     for option `y' or `z':
        4. * (NUM) length of prism
     for all options:
        5. * (Y/N) positive prism? <y>
Description:
This command creates a quarter-circle polygon or a quarter-circle prism based
on that polygon (quarter-cylinder).
Specify the base plane (one of the axial planes; x  xy plane the default, y
 yz plane or z  xz plane), the center point, radius and height (for option
`x') or the width (for options `y' or `z'). You may enter `0' for a 2D
polygon. Specify whether the solid is to be positive (option `y', the default)
or negative (option `n').
You are prompted to create additional quarter-cylinders until another command
is selected.

        Example: \hfcyl x 3 3 0 4 1 y

Result: A quarter-cylinder is created with its center point at 3 3 0,
a radius of 4 units (meters or feet), and a height of 1 unit.
