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[arx]如何闭合正在画的n边形？（给出源程序）
[arx]如何闭合正在画的n边形？（给出源程序）
附上我的测试程序，里面提供了我尺寸标注 求面积 画表格的程序
#include <aced.h>
#include <acedads.h>
#include <dbents.h>
#include <dbsymtb.h>
#include <dbgroup.h>
#include <dbapserv.h>
#include <acestext.h>
#include <migrtion.h>
#include <geassign.h>
#include <math.h>
#include <dbpl.h >
ads_point pt1[512];
acgepoint3d pt[512];
int nodenumcount;
void area()
{
int i=0;
acedgetpoint(null,"\n请选择起始点:",asdblarray(pt[0]));

do {
acedgetpoint(asdblarray(pt[i]),"\n拾取下一点:",asdblarray(pt[i+1]));
acdbline *pline=new acdbline(pt[i],pt[i+1]);
acdbblocktable *pblktable2;
acdbhostapplicationservices()->workingdatabase()
->getsymboltable(pblktable2, acdb::kforread);
acdbblocktablerecord *pblocktablerecord;

pblktable2->getat(acdb_model_space, pblocktablerecord,
acdb::kforwrite);
pblktable2->close();

acdbobjectid lineid=acdbobjectid::knull;
pblocktablerecord->appendacdbentity(lineid, pline);
pblocktablerecord->close();
pline->close();
changepoint(pt1[i+1],pt[i+1]);//转换点的类型
changepoint(pt1[0],pt[0]);//转换点的类型
i++;
nodenumcount=i;//取得边数
}
while((equal_points (pt1[i], pt1[0]))==0);//起始点=终点时结束循环
}
int equal_points (const ads_point p1, const ads_point p2) //判断两点是否为同一点
{
// 指定误差范围
const ads_real equality_margin = (ads_real)0.0001;
int c ;
for (c = x ; c <= z ; c++)
{
if (fabs(p1[c] - p2[c]) > equality_margin)
{ return (0) ; }
}
{
acdbline *pline=new acdbline(pt[0],pt[nodenumcount]);
acdbblocktable *pblktable2;
acdbhostapplicationservices()->workingdatabase()
->getsymboltable(pblktable2, acdb::kforread);

acdbblocktablerecord *pblocktablerecord;

pblktable2->getat(acdb_model_space, pblocktablerecord,
acdb::kforwrite);
pblktable2->close();

acdbobjectid lineid=acdbobjectid::knull;
pblocktablerecord->appendacdbentity(lineid, pline);
pblocktablerecord->close();
pline->close();
return (1) ;
}
}
void changepoint(ads_point& ads_pt,acgepoint3d acge_pt) //acgepoint3d转换成ads_point类型
{
double x=acge_pt[0];
double y=acge_pt[1];
double z=acge_pt[2];
ads_pt[x]=x;
ads_pt[y]=y;
ads_pt[z]=z;
}
对于如上这段画n边形的程序，有个失误的地方，就是他是以起点=终点来判断n边形画结束的，如果遇到图形线段很多时，如果找不到起点，就会陷入死循环！！
在正常的cad画图中我们可以用“c”命令来闭合当前正在画的图形，请问这在程序中如何实现，希望有高手指点一下！

斑竹能不能给个意见啊 谢谢了
你可以用acdbpolyline来画多边形，然后调用setclosed(adesk::ktrue）实现闭合
哈哈，我又回来了。互相学习，共同提高qq:250623330我的群：1083110