Rotating a box?

Troubleshooting graphics
1

Hi,

Im trying to do simple rotation of a box





        Quaternion quat = new Quaternion(30, 30, 30, 30);

        box.setLocalRotation(quat);



        box.updateModelBound();

        box.updateGeometry();





and its not rotating at all, what am i missing?

2

Umm, you are just setting the rotation…

not rotating the box.



Check out the TestBoxColor test.

3

Also, this doesn't look to be a valid rotation.


Quaternion quat = new Quaternion(30, 30, 30, 30);



Try a method like fromAngleNormalAxis()...


Quaternion quat = new Quaternion();
quat.fromAngleNormalAxis(35 * FastMath.DEG_TO_RAD, Vector3f.UNIT_Y);
box.setLocalRotation(quat);

box.updateModelBound();
box.updateGeometry();



Also, HelloAnimation.java uses this technique along with a controller to spin a cube, might be worth a look.
4

thanks alot, nows its clear to me



one more thing… is there any piece of code that shows how to work with SpatialTransformer ?



well, im trying to animate the rotation of a box … but thing is I cant control the box (move it) after running the SpatialTransformer for rotation



any working code will be useful

:slight_smile:

5

You can also use SpatialTransformer to control the position by using its setPosition() method, much the same way the rotations are controlled in the HelloAnimation example.

6

well you see, Im trying to make a small game, very similar to TestPong, with a small change that a player can rotate his box 90 degrees when he presses a certain button, to hit the ball and give it more velocity



I tried to do this using the SpatialTransformer, but the rotation/movement is becoming faster each time the player hits the button



I guess SpatialTransformer is not the best solution for my problem?

7

Have you tried working through the Flag Rush tutorials in the wiki? They may take you a day or two, but it will be a good introduction to many of jME's features and will help you to understand the mechanics of what you are wanting to do here.

8

i guess ur right … I'll take a deep look through this tutorial and get back …

thanks