yang686526

[arx]arx计算选取的直线总长度
[arx]arx计算选取的直线总长度
本人用arx编写了一个计算所选取直线总长度的程序，感觉挺不方便，大家给点意见。
void getsellens()
{
ads_name ent1,ssents;
long i(0),n;
char* entname;
struct resbuf *rb,*rbtmp;
double flength(0);
acgepoint3d *pt1,*pt2;
acedssget(null,null,null,null,ssents);
acedsslength(ssents,&n);
for (;i<n;i++)
{
acedssname(ssents,i,ent1);
rb=acdbentget(ent1);
for (rbtmp=rb;rbtmp!=null;rbtmp=rbtmp->rbnext)
{
if (rbtmp->restype==0)
{
entname=rbtmp->resval.rstring;
continue;
}
if (rbtmp->restype==10)
pt1=new acgepoint3d(rbtmp->resval.rpoint[x],rbtmp->resval.rpoint[y],
rbtmp->resval.rpoint[z]);
if (rbtmp->restype==11)
pt2=new acgepoint3d(rbtmp->resval.rpoint[x],rbtmp->resval.rpoint[y],
rbtmp->resval.rpoint[z]);
}
if (!strcmp(entname,"line"))
{
flength+=getlinelen(pt1,pt2);
}
}
acutprintf("总长度 %f",flength);
// return 0;
}
double getlinelen(acgepoint3d *pt1,acgepoint3d *pt2)
{
double len=sqrt(pow(pt1->x-pt2->x,2)+pow(pt1->y-pt2->y,2)+pow(pt1->z-pt2->z,2));
return len;
}
有人用vlisp编写了计算弧线和直线总长的程序，很简单。
(defun c:calen (/ curve tlen ss n sumlen)
(vl-load-com)
(setq sumlen 0)
(setq ss (ssget '((0 . "circle,ellipse,line,*polyline,spline,arc"))))
(setq n 0)
(repeat (sslength ss)
(setq curve (vlax-ename->vla-object (ssname ss n)))
(setq tlen (vlax-curve-getdistatparam
curve
(vlax-curve-getendparam curve)
)
)
(setq sumlen (+ sumlen tlen))
(setq n (1+ n))
)
(print (strcat "总长度: " (rtos sumlen 2 5)))
(princ)
)