创建柱面

Synopsis

obj = TABCYL/obj,x,y,z[,start,end]

Description

Creates a body whose underlying surface type is a tabulated cylinder. You create the body by specifying a previously defined generating curve and a directrix in the form of a vector.

The generating curve is projected along the directrix to create the surface.

The vector components in X, Y, and Z establish the direction of the directrix and the length of the surface.

You may specify a start and end value which represent the distance along the directrix, from the generating curve, that the surface is created.

Parameters

Parameter

Description

obj

An existing curve which serves as the generating curve.

x,y and z

The X,Y and Z components of a vector, the directrix, along which the generating curve is moved to create a surface.

start,end

The start and end parameters determine the length of the tabulated cylinder as measured along the specified vector. Each value is a distance along the vector from the origin of the generating curve. Therefore, the surface starts at a point equal to the origin of the generating curve plus the start value and end at a point equal to the origin of the generating curve plus the end value.

NOTE: If not specified, the default values for start and end parameters are zero for the start value and the length (magnitude) of the specified vector for the end value.

Example

Creating a tabulated cylinder type sheet body by specifying a generating curve and a directrix in the form of a vector.

Declarations

ENTITY/P(4),SPLN1,TAB1

Geometry Definition

P(1)=POINT/.5,1
P(2)=POINT/1.5,2
P(3)=POINT/2.5,.5
P(4)=POINT/3,1.5
SPLN1=SPLINE/P

Sheet Body Definition

TAB1=TABCYL/SPLN1,0,0,1,0,1

A Tabulated Cylinder Type Sheet Body

Parameter	Description
obj	An existing curve which serves as the generating curve.
x,y and z	The X,Y and Z components of a vector, the directrix, along which the generating curve is moved to create a surface.
start,end	The start and end parameters determine the length of the tabulated cylinder as measured along the specified vector. Each value is a distance along the vector from the origin of the generating curve. Therefore, the surface starts at a point equal to the origin of the generating curve plus the start value and end at a point equal to the origin of the generating curve plus the end value.