How do I get the plane of a circle?

Altair Forum User

In order to define a plane containing a circle, I need the center of the circle and the normal of the plane. Getting the center is simple using hm_getbestcirclecenter. I have not been able to find a means of getting the normal. If it were possible to get the coordinates of two points on the circle, I could use those with the coordinates of the circle center to calculate the normal. However, I haven't been able to find a means of getting those two points.

tinh

I know that there is such command ( i read it already), but I can't remember

anway, you can try creating the circle (using *createbestcirclecenternode with last argument=1 (will create circle, too))

and then create 4 nodes on that circle to calculate normal vector

imoto

It might be hm_getcoordinatesofpointsonline.

 

Example:

*createentitypanel lines 'Select line';
set lineid [hm_info lastselectedentity lines];
foreach coord [hm_getcoordinatesofpointsonline $lineid '0 0.3 0.6'] {
 tk_messageBox -message 'Coordinate = $coord';
}
 

Altair Forum User

Altair Forum User said:

It might be hm_getcoordinatesofpointsonline.

 

Example:

*createentitypanel lines 'Select line';
set lineid [hm_info lastselectedentity lines];
foreach coord [hm_getcoordinatesofpointsonline $lineid '0 0.3 0.6'] {
 tk_messageBox -message 'Coordinate = $coord';
}
 

 

That works perfectly! Thanks!