Hi,
In an Attempt to implement terrain following I have used the following code
Point3d pickStart = new Point3d();
Vector3d down = new Vector3d(0.0, -15.0, 0.0);
Transform3D newT3d = new Transform3D();
newT3d.setTranslation(new Vector3d(0.0, 1.5, STEP));
newT3d.mul(ourTrans);
newT3d.transform(pickStart);
picker.setShapeRay(pickStart, down);
PickResult picked = picker.pickClosest();
if (picked != null){
PickIntersection intersect = picked.getIntersection(0); //i get Exception on this
//line
Point3d nextpoint = intersect.getPointCoordinates();
System.out.println("moveStep : Start Point !! "
+ pickStart);
System.out.println("moveStep : Next Point !! "
+ nextpoint);
double pickY = (pickStart.y);
pickY = pickY - 1.5;
if (nextpoint != null) {
if (nextpoint.y != pickY) {
Vector3d translate = new Vector3d();
ourTrans.get(translate);
translate.y = nextpoint.y +1.5;
ourTrans.setTranslation(translate);
//ourTrans.setTranslation(new
// Vector3d(pickStart.x, nextpoint.y,
// pickStart.z));
trans.setTransform(ourTrans);
}
}
}
I have a world made in 3dMax and imported using a 3ds loader
the PROBLEM IS i get
Exception occurred during Behavior execution:
java.lang.IndexOutOfBoundsException: Index: 0, Size: 0
at java.util.ArrayList.RangeCheck(ArrayList.java:507)
at java.util.ArrayList.get(ArrayList.java:324)
at com.sun.j3d.utils.picking.PickResult.getIntersection(PickResult.java:441)
at SimpleKeyBehavior.processStimulus(SimpleKeyBehavior.java:83)
at javax.media.j3d.BehaviorScheduler.doWork(BehaviorScheduler.java:172)
at javax.media.j3d.J3dThread.run(J3dThread.java:250)
very often at Line marked with java comment "//"
If anyone could help me why this exception is thrown or
why should the pick results have no intersection even though
the result is not null ...that is going to be quite a help
Vijay Dharap,
Infosys Technologies Ltd.
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