cad怎么返回一个多边形的面积呢？在api有没有这个函数呢？[求助]

无果树

efan2000

龙龙仔

Specifies the enclosed area of an arc, circle, ellipse, lightweight polyline, polyline, region, or planar-closed spline.

Signature

object.Area

object        Arc, Circle, Ellipse, LightweightPolyline, Polyline, Region, Spline
The object or objects this property applies to.
Area        Double; read-write
The area of the object specified in square drawing units.

Remarks

Wide polylines:
The area is defined by the center of the width.
Regions:
The area equals the combined area for all the objects in the region .
Open objects such as arcs, spline curves, and open polylines:
The area is computed as though a straight line connects the start point and endpoint.

myfreemind

先将这个多边形用多段线封闭，比如这个多段线对象是plineobj
msgbox plineobj.area
就可以了！

Taoyimaier

呵呵，我天天都是在计算房屋的产权面积，如果说到算面积，不好意思，版主，也容我说两句，好么，详细点是，先用(set pline (bpoly (getpoint "在多边形中定位一点")))捕获polyline 当然有时有复杂的弧线时会小有问题，然后用（command "area" "e" pline) 算出面积来，再用系统变量“area” 就是 (set area （getvar "area"))获得面积,现在给你我得这个程序

myfreemind

我拿去仔细研究研究一下，：）