Overview | Statement List | Example

点方法

Synopsis

obj list = BCURVE/objlist1[,VERT[,num list]][,DEGREE,num[,CLOSED]][,IFERR,label:]

Description

The point method creates a B-spline through a series of existing points using the BCURVE statement. The default creation mode is to define the curve through the points. However, the minor word VERT causes the system to interpret the points as control vertices. The optional number list included with the VERT parameter can assign weights to these vertices.

Parameters

Parameter	Description
objlist1	A list or array of existing points which is used to create the curve.
VERT	Minor word that indicates the points in the object list represent control vertices.
num list	A numerical list or array which contains the positive weights which are assigned to each corresponding point in the list.
DEGREE	Minor word that indicates that the degree specified for the curve causes the creation of a B-spline curve, unless the degree value meets the requirements of a Bezier curve.
num	A positive numerical value or variable which represents the degree of the curve.
CLOSED	Minor word that indicates the curve is to be closed; can only be used if the degree is specified.
IFERR,label:	Specifies a label to which program execution jumps if the system cannot create the curve from valid data.