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圆，高度，顶点半角

Synopsis

obj = CONE/arc,{"PMOD3"|point},d,ANGLE,a

Description

Creates a cone by defining an existing circle and specify an angle which is one half of the vertex angle.

The height value is used to define how much of the cone is defined. The height is measured from the plane of the

Either a point or a Positional Modifier (PMOD3) is required to define on which side of the plane of the circle the vertex lies.

Parameters

Parameter	Description
arc	An existing arc which serves as the generating curve (directrix) of the cone. By definition the axis of the cylinder, the generatrix, is normal to the plane of the arc.
PMOD3	A positional modifier which may be used to indicate which side of the existing arc the vertex lies on. The direction is referenced to the work coordinate system.
point	A previously defined point may be used in place of the positional modifier to indicate which side of the existing arc the vertex lies on. This point establishes a direction only and does not have to lie on the cone or the axis.
d	The distance, along the axis, from the existing arc to the base of the cone. This value establishes the portion of the cone that is generated.
ANGLE	Minor word that indicates that the vertex angle of the cone is to be specified.
a	A value equal to one half of the vertex angle. This value establishes the generatrix of the cone.