ok, i found a way :
void display(void)
{
ViewportPtr vp = mgr->getWindow()->getPort(0);
int mx = vp->getPixelWidth()/2.0;
int my = vp->getPixelHeight()/2.0;
Line line = mgr->calcViewRay(mx,my);
Vec3f ld = line.getDirection();
ld*= -1;
Quaternion qD(Vec3f(0,0,1),ld);
Vec3f up_temp;
qD.multVec(Vec3f(0,1,0), up_temp);
Quaternion qU(up_temp, mgr->getNavigator()->getUp());
Quaternion qResult;
qResult = qU;
qResult.mult(qD);
Matrix m;
m.setRotate(qResult);
beginEditCP(theTextTrsf);
theTextTrsf->setMatrix(m);
endEditCP(theTextTrsf);
mgr->redraw();
}
and it seems to work.
any comment ?
thanks,
Stephane
>>> [EMAIL PROTECTED] 30/04/2008 13:53 >>>
hi,
I need to have text in the main 3d viewer, attached to some points of
my models.
The problem is that the text rotates with the camera.
After reading the mailing list archive, it seems the experimental code
( OSGScreenAlignedText ) cannot be used.
So I tried to rotate my text nodes before every "mgr->redraw();" by
taking the "mgr->getCamera()->getWorldToScreen" , or using the
"mgr->calcViewRay" but i cannot achieve the result I want.
can you help me with that ? I'm lost ....
( I cannot use text in foreground as the text needs to be hidden
behind
the models)
Thanks a lot.
Stephane
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