| How do you get original positions back out after picking from a transformed
| object and extracting the closest vertex ?
Maybe this is not what you need, but to get a picked point in a displayed
object back into the original world coordinates, just strip off the Xforms
on the object, catenate them, invert, and apply to the pick point.
DXQueryPickPath(picks, poke, pick, &pathlen, &path, &elid, &vertid);
current_picked_object = pdata->obj;
mat = Identity;
for (i=0; i < pathlen; i++) {
current_picked_object = DXTraversePickPath(current_picked_object, path[i],
&mat);
if (! current_picked_object) {
return(-1);
}
}
{
Matrix mat_inv;
double x, y, z;
x = point.x;
y = point.y;
z = point.z;
mat_inv = DXInvert(mat);
MatRotate(mat_inv, &x, &y, &z);
MatTranslate(mat_inv, &x, &y, &z);
/* Now x,y,z are in original coordinates. */
}
Or maybe I missed your entire point?
