BresenhamTerrainPicker result

Troubleshooting General Help
1

Hi,



I’m having troubles using the BresenhamTerrainPicker. The following code does not return any results unless the mouse cursor is centered (well, nearly centered) in my canvas.



[java]

Vector2f screenCoords = TestApplication.this.getInputManager().getCursorPosition();

Vector3f worldCoords = TestApplication.this.getCamera().getWorldCoordinates(new Vector2f(screenCoords.x, screenCoords.y), 0f).clone();

Vector3f dir = TestApplication.this.getCamera().getWorldCoordinates(new Vector2f(screenCoords.x, screenCoords.y), 1f).subtractLocal(worldCoords);



CollisionResults results = new CollisionResults();

Ray ray = new Ray(worldCoords, dir);

System.out.println(“Ray:n” + "origin: " + ray.getOrigin() + "ndirection: " + ray.getDirection());



TestApplication.this.terrainPicker.getTerrainIntersection(ray, results);



if (results.size() > 0) {

System.out.println(results.getClosestCollision().getContactPoint());

}



[/java]



I must be missing something here…



Thanks for your help

2

Actually this is working only for some terrain patches. That is, I get a result, a valid one (I am checking it by positionning a sphere on the contact point), but for other patches, I haven’t got any results

3

This is the code I use, it works :

[java]Vector3f origin = cam.getWorldCoordinates(inputManager.getCursorPosition(), 0);

Vector3f direction = cam.getWorldCoordinates(inputManager.getCursorPosition(), 1);

direction.subtractLocal(origin).normalizeLocal();



Ray ray = new Ray(origin, direction);

CollisionResults results = new CollisionResults();

shootables.collideWith(ray, results);[/java]

1 Like
4

Hum, no, that shouldn’t change anything. The dir is the result of getWorldCoordinates(new Vector2f(screenCoords.x, screenCoords.y), 1f), after having applied substraction (.subtractLocal(worldCoords)). I just checked btw

5

I 'll check that .

6

Thanks very much, made my day

7

I just totally forgot to normalize the vector… -_-;