cone
Creates a new cone.
Syntax

cone([a[, f[, d[, α]]]])

a
is a threedimensional real vector 
f
is a threedimensional real vector 
d
is a threedimensional real vector 
α
is a real number

Description
cone()
creates a circular cone (quadratic surface) with radius 1 and height 1 parallel to the z
axis, extending from z = 0
(apex) to z = 1
.
cone(a, f, d, α)
translates the cone by a
, scales it by diag(f)
, aligns it with d
, and rotates it an amount α
about its axis.
Hence,

a
specifies the position of the cone’s apex. 
f = (s, t, h)
specifies the halfaxis lengthss
andt
and heighth
of the cone. 
d
specifies the axis of the cone (considered as an arrowhead, the arrow will point in the−d
direction). 
α
specifies the rotation of the cone about its axis.
If omitted, a
defaults to ❨0, 0, 0❩
, f
to ❨1, 1, 1❩
, d
to ❨0, 0, 1❩
, and α
to 0
.
The object is shown in the current scene and a reference to the object is returned.
The AdjustVisual
function can be used to adjust the appearance of the cone. See Visual settings for a list of applicable settings.
Examples
cone()
cone(❨2, 2, 0❩, ❨1, 1, 2❩)
cone(❨5, 5, 0❩, ❨1, 1, 5❩, ❨−1, −1, 0❩)
Notes
To create a solid cone, use solid("cone")
instead.