LIBGDX Box2D World QueryAABB not working

Question

So I tried to get the bodys in my world in a range, which is a square(AABB).

This is my Code:

public List<MovableObject> getObjectsInRange(float x, float y, float x2, float y2) {
    final List<Fixture> list = new ArrayList<Fixture>();
    world.QueryAABB(new QueryCallback() {
        @Override
        public boolean reportFixture(Fixture fixture) {
            System.out.println(fixture);
            list.add(fixture);
            return true;
        }
    }, x, y, x2, y2);
    List<MovableObject> l = new ArrayList<MovableObject>();
    for (Fixture fixture : list) {
        l.add((MovableObject) fixture.getBody().getUserData());
    }
    return l;
}

But what this actually does, is, I only get a report if the AABB is directly inside the fricture. I've got some images to show you what I mean.

Not working:

Working:

score 1 · Accepted Answer · answered Mar 07 '16 at 14:13

I solved the problem, because of the upside down y system of libgdx, I had to modify it the following way

public List<MovableObject> getObjectsInRange(float x, float y, float x2, float y2) {
    final List<Fixture> list = new ArrayList<Fixture>();
    world.QueryAABB(new QueryCallback() {
        @Override
        public boolean reportFixture(Fixture fixture) {
            list.add(fixture);
            return true;
        }
    }, Math.min(x, x2), Math.min(y, y2), Math.max(x, x2), Math.max(y, y2));
    List<MovableObject> l = new ArrayList<MovableObject>();
    for (Fixture fixture : list) {
        l.add((MovableObject) fixture.getBody().getUserData());
    }
    return l;
}

I added Math.min and Math.max

score 0 · Answer 2 · answered Mar 06 '16 at 13:08

0

How are you calling getObjectsInRange ? Because QueryAABB will only report objects that are inside the area.

answered Mar 06 '16 at 13:08

KenobiBastila

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LIBGDX Box2D World QueryAABB not working

2 Answers2