Ray casting hit location help?

archive development-discussion-jme2
1

I been looking into how to get the location of the mesh like a flat surface plain. I am trying to work on RTS game builds. Where units move around in ground or outer space.



Can any one point or show how to code part of it?

2

You might want to check the TestPick example in jmetest.intersection



You simply have to add your terrain to the node-tree that is used for picking.

However, probs start if things are too near to each other.



here is the code I use for my picking:

        if (MouseInput.get().isButtonDown(0)) {

            Vector2f screenPos = new Vector2f();
            screenPos.set(MouseInput.get().getXAbsolute(), MouseInput.get().getYAbsolute());

            // Create a ray starting from the camera, and going in the direction
            // of the mouse's location
            Ray mouseRay = display.getPickRay(screenPos, false, null);

            // Does the mouse's ray intersect the targetPoint's world bounds?
            PickResults results = new BoundingPickResults();
            results.setCheckDistance(true);
            pickNodes.findPick(mouseRay, results); //delivers in results
            Spatial targetPoint;// = spinningBox;//todo: we need the difference, not the middle of the box

            String hitItems = "";
            if (results.getNumber() > 0) {

                for (int i = 0; i < results.getNumber(); i++) {
                    targetPoint = results.getPickData(i).getTargetMesh();
                    hitItems += targetPoint.getName() + " " + results.getPickData(i).getDistance();
                    if (i != results.getNumber() - 1) {
                        hitItems += ", ";
                    }
                }
                System.out.println("**** gotcha"+results.getNumber()+": " + hitItems);
            }
        }


I'm no pro here, but I'm sad that nobody did answer (not much answer questions here?), so maybe this is of help for you.  :)