【转帖】oddbpolylineaddvertexat question
 

oddbpolyline::addvertexat question
oddbpolyline::addvertexat question
hi,
i have a input array of odgepoint3d elements, which are checked for forming a plane and want to fill a oddbpolyline with these points (they are in wcs coordinates). i can calculate their normal.
which is the bast way to do the conversion between the world and the ecs's of the polyline? when shall i set the calculated normal to the polyline?
i saw a technique in a arx example -
they just set the 2d points without the z coordinate, then call setelevation(z), and then transform the whole polyline (which is in pseudo-wcs coordinates) with the current ucs transformation.
is this right?
thanks in advance for any help.
regards
chudomir
i'm not sure what you mean by 'pseudo-wcs'. but if you have an arx example that performs this - it should be fairly simply to apply the same technique using oda
i succeded to make something to work:
code:
void plinesetdata(oddbpolyline* ppline, const vector<odgepoint3d>& poly, const vector<doubles>& bulges, bool bclosed)
{
if (poly.size()<2) throw error(invalidargument);
if (poly.size()!=bulges.size()) throw error(invalidargument);
ppline->reset(true,0);

odgevector3d normal;
oderror err = gecalculatenormal(&poly[0], poly.size(), &normal);
if (err.code() != eok) throw err;

const double delevation = poly[0].z;
ppline->setnormal(normal);
ppline->maximizememory();
for (uint i=0; i<poly.size(); ++i) {
// add the vertex by cutting the z-value

ppline->addvertexat((int)i,odgepoint2d(poly[i].x,poly[i].y),bulges[i]);
} //for

ppline->minimizememory();
ppline->setelevation(delevation);
ppline->setclosed(bclosed);
ppline->setdatabasedefaults();

ppline->transformby(odgematrix3d::worldtoplane(normal));

}
while the arx example applied the whole wcs to ucs matrix instead of odgematrix3d::worldtoplane(normal).
best regards
chudomir