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solids
This solid geometry package defines a structure revolution
that
can be used to fill and draw surfaces of revolution. The following example
uses it to display the outline of a circular cylinder of radius 1
with axis O--1.5unit(Y+Z)
with perspective projection:
import solids; size(0,100); revolution r=cylinder(O,1,1.5,Y+Z); r.draw(heavygreen);
Further illustrations are provided in the example files cylinder.asy
,
sphere.asy
, cones.asy
, hyperboloid.asy
, and
torus.asy
.
The structure skeleton
contains the three-dimensional wireframe
used to visualize a volume of revolution (here longitudinal refers to
those segments that are parallel to the axis of revolution; transverse
segments are perpendicular to the axis of revolution):
struct skeleton { // transverse skeleton front3[] front; front3[] back; // longitudinal skeleton front3[] longitudinal; }