Yip I know nobody has replied to this but I have a solution of sorts. If
anyone can explain what on earth is going on I'd like to know.
I have a function that does only this and it does NOT work. (doesn't
work in the sense I'm trying to rotate around the center point of the
object) The translation moves the object so the point I wish to rotate
is over point (0, 0, 0)
private function iDontWork() : void {
object.transform.matrix3D.appendTranslation(150, 0,0);
object.transform.matrix3D.appendRotation(36, Vector3D.Y_AXIS);
object.transform.matrix3D.appendTranslation(-150, 0,0);
}
I have another function that does only this and it DOES work. J
private function IDoWork() : void {
translateOnly();
rotateOnly();
translateOnly();
}
private function rotateOnly() : void {
object.transform.matrix3D.appendRotation(36, Vector3D.Y_AXIS);
}
private var valueToMove : Number = 150;
private var translateUpOrDown : Boolean = false;
private function translateOnly() : void {
if(translateUpOrDown){
object.transform.matrix3D.appendTranslation(valueToMove, 0,
0);
translateUpOrDown = false;
} else {
object.transform.matrix3D.appendTranslation(-valueToMove,
-0,0);
translateUpOrDown = true;
}
}
Any ideas why one works and the other doesn't. They are both the same
just one splits the transformations into separate functions and the
other does not. Bug or feature??
Cheers.
From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On
Behalf Of Kenneth Sutherland
Sent: 10 March 2009 14:21
To: flexcoders@yahoogroups.com
Subject: RE: [flexcoders] flash 10 3D
I've not managed to rotate a Box on some arbitrary point. If anyone
knows how to do this, that would be great.
What I've tried so far to get it to rotate on its Y axis in the middle
of the Box.
myBox.appendTranslation( -(theBox.width/2), 0, 0);
myBox.appendRotation(angleToRotate, Vector3D.Y_AXIS);
myBox.appendTranslation( (theBox.width/2), 0, 0);
This does not work, it always rotates around its registration point, no
matter what the translation values are.
I've tried various combinations of prepend append, I've tried quite a
few variations including adding a point for the third parameter on the
appendRotation but the only way I've managed to get it to rotate
correctly is if the Box is positioned at (0, 0, 0) inside the
application. So I tried changing the x, y z of the box then doing the
rotation and then resetting the x, y z but still didn't work. I tried
changing the translation to translate the box's width/2 and what its x
coord was but again no joy.
Anyone any ideas.
Cheers Kenneth.
From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On
Behalf Of Kenneth Sutherland
Sent: 09 March 2009 16:08
To: flexcoders@yahoogroups.com
Subject: [flexcoders] flash 10 3D
I'm trying to get to grips with some of the new 3D features in flash
player 10 and I'm having limited success. So I'm looking for some
helpful tutorials/examples. I've seen a few that are to do with gumbo,
but I'm not looking at that yet. Just flex 3.2/3.3 examples.
Some of the sites I've seen useful info on so far are.
http://www.yswfblog.com/blog/2008/11/12/3d-with-flash-10-part-2/
http://www.flex888.com/934/tutorial-for-3d-using-flash-10.html
http://polygeek.com/1508_flex_flash-10-3d-examples-of-rotating-component
s
http://www.neuroproductions.be/experiments/the-new-drawing-api-rocks/
http://blog.dcholth.com/
If you know of any other good ones, let me know.
Cheers.
realise
.
Kenneth Sutherland
Technical Developer
Realise Ltd
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