>Hi Daniel,
>yes, this seems to be quite tricky.
>"Dvorak, Daniel J." wrote:
>> Do you have an example you could post?
>no, unfortunatly not. I am happy that my application is running now :-)
>Best Regards,
>Andreas
Hi Daniel,
it seems that Andreas isn't in the mood to share code. Here is the
example code from Jon Barrilleaux's book: 3D User Interfaces with Java3D.
By the way it's a nice book!
Hope it helps.
Here we go:
//establish pick root
BranchGroup root;
//build pick ray
Point3d rayOrg = new Point3D();
Vector3d rayDir = new Vector3D();
//Set rayOrg, rayDir to your needs
....
rayDir.normalize();
//build pick ray object form rayOrg & rayDir
PickRay ray = new PickRay(rayOrg,rayDir);
//throw the pick ray into scene and all leaf shapes under the pick root
//don't forget to set capability bits ;-)
SceneGraphPath paths[] = root.pickAllSorted(ray);
if (paths==null)
{
System.out.println("no hits");
}
else
{
//shape target bounds were hit, check for real hits
for (int hitI=0 ; hitI < paths.length; hitI++)
{
// intersect pickray with shape target geometry
Node shape = paths[hitI].getObject();
double dist[] = {0.0};
boolean isRealHit = ((Shape3D) shape).intersect(paths[hitI],ray,dist);
if (isRealHit)
{
//compute hit point from hit distance and pick ray
Point3D point = new Point3D();
point.scaleAdd(dist[0], rayDir, rayOrg);
System.out.println("real hit at :" + point);
}
}
}
Regards and happy hacking
Joerg
--
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