[Solved] Box not showing up when moving vertices

Troubleshooting General Help
1

I am currently trying to fix a bug with a “selectionBox” (a custom shape of a box without bottom quad) to move and resize according to the start and current mouse position (just like when selecting stuff in a normal RTS but with a cube, think Dungeon Keeper style).

Although I stumble upon a problem when trying to “use” the selectionBox while the camera is not seeing the center of the world (0, 0, 0). At least I think that’s when it stops to show up.

Is there anyone that knows what the problem might be, I’ve checked with a lot of System.out.println();'s and the problem seems to be somewhere inside the code where I move the vertices as no data is lost on the way as far as I’ve seen.



The code for moving the vertices reads:

[java]

private void updateSelectionBoxVertices(SelectionArea selectionArea)

{

VertexBuffer buffer = selectionBoxGeo.getMesh().getBuffer(Type.Position);

float[] vertexArray = BufferUtils.getFloatArray((FloatBuffer) buffer.getData());



vertexArray[0] = selectionArea.start.x;

vertexArray[2] = selectionArea.start.y;

//…

vertexArray[24] = selectionArea.end.x;

vertexArray[26] = selectionArea.end.y;



buffer.updateData(BufferUtils.createFloatBuffer(vertexArray));

}

[/java]

The selectionArea is just a simple class containing two Vector2f and dots are just all the other vertices in the array based on the same idea as the four shown, no need to show them.

2

Don’t forget to call updateBound()



…that’s just the first thing that jumps out at me.

1 Like
3

Where do I find that method?

4

It’s on Mesh.

1 Like
5

I guess you ment .updateModelBound(); and thanks it worked! :smiley: although, I get the warning in the editor that “Updating is not needed in jME3, check your update order if you need to call this.” But I think I’ll just ignore it :slight_smile:



Thanks again, you made my day (well night actually)! :wink:

6

No. I meant Mesh.updateBound().



http://hub.jmonkeyengine.org/javadoc/com/jme3/scene/Mesh.html#updateBound()



If you move the vertexes around in the mesh then it needs its bounds updated. At least, I’ve always done it.

7

Well, that one didn’t work so I think I’ll stick to Geometry.updateModelBound(); since that works :stuck_out_tongue: