Parallelograms in space

See Section 26.8.4 for parallelograms in the plane.

The parallelogram command creates parallelograms in space.

parallelogram takes three mandatory arguments and one optional argument:
- A,B,C, three points.
- var, a variable name.
parallelogram(A,B,C ⟨,var⟩) returns and draws the parallelogram ABCD determined by A,B and C.
If the option var is given, the point D will be assigned to it.

A,B,C:=point(0,0,0),point(3,3,3),point(0,0,3); parallelogram(A,B,C)

parallelogram(A,B,C,D); coordinates(D)

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−3,−3,0

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