Collision does not work with box

Troubleshooting graphics
1

hi all i added a box to rootnode

and i used collision to know if my pointer touch the box but i have collision outside my box :

[java]

Box box = new Box(new Vector3f(0, -3, 0), 6f, 1f, 1f);

Geometry back = new Geometry(“galaxy”, box);

back.setMaterial(material);

[/java]

and for collision

[java] Vector3f origin = getCamera().getWorldCoordinates(

getInputManager().getCursorPosition(), 0.0f);

Vector3f direction = getCamera().getWorldCoordinates(

getInputManager().getCursorPosition(), 0.3f);

direction.subtractLocal(origin).normalizeLocal();

Ray ray = new Ray(origin, direction);

CollisionResults results = new CollisionResults();

int collisionSphere = box.collideWith(ray, results);

if (collisionSphere > 0) {

System.out.println(‘Box touched’);

}

[/java]

so with that code i ve got ‘Box touched’ outside the box.Where 's my error?

2

You dont check the collision results

3

if i do [java] results.getClosestCollision().getGeometry().getName()[/java] this is not the box i touch with the pointer but another one

something wrong …

4

with sphere it works.With box it does not

5

my target is to know if the mouse pointer collide with a box.

Could u believe that with that code it does not work?!



[java]results.getClosestCollision().getGeometry().getName()[/java] return me not the box name i touch.The region where i get ‘Box touched’ is completelly wrong .Another zone

6

Have you got a sky box?

Sometimes collision result is messed up because the sky box is in the way but you can’t see it.



If you got one, do that sky.setLocalScale(1000); in your simpleInit and test again.

7

@nehon that cant happen because he has : box.collideWith

if he had rootNode.collideWith it may be a problem.

@dilembo i am using the same code in my game and it works ( i tried with a quad). The only difference i have is :

[java]

scene.getCollidables().collideWith(ray, results);

if (results.size() > 0)

{

}

{[/java]

I am 99% sure that the error is because you use the crappy jme’s box constructor. Try this :

[java]

/**Lower left corner is at (0,0,0) and top right corner is at (x,y,z)*/

public static Box createLowerLeftBox(float x, float y, float z)

{

return new Box(new Vector3f(x / 2f, y / 2f, z / 2f), x / 2f, y / 2f, z / 2f);

}

[/java]

8

Exists a craapy jme’s box constructor?



Actually it is a box in a android phone screen could be that the reason?

I have collision to the box not when i touch the box.Quite strange.I ll post this to android jme3 forum

9

i tried to create a jme3 app and it works resizing properly the box.It’s a problem for android forum thanks anyway