You have to do a series of matrix (transform) multiplications to
effect the equivalent of a VRML transform group, which has a "center"
for rotation and scale. In the following, _xform is the composite
Transform3D and _centerXform, _rotateXform, etc. are intermediate
geometric transforms. You can also achieve the equivalent by stacking
a series of individual TransformGroups in the reverse order (i.e.
translation at the root end, center at the leaf end).
_xform.set(_centerXform);
_xform.mul(_rotateXform);
_xform.mul(_scaleXform);
_xform.mul(_centerNegXform);
_xform.mul(_xlateXform);
--jon
> Date: Mon, 31 May 1999 14:39:32 +1000
> From: "Leung, Sunny" <[EMAIL PROTECTED]>
> Subject: [java3d] Changing local coordinate system??
>
> Hi All,
>
> How can I shift the origin of a Shape3D object away from its centre? I want
> to pivot a box at one edge of it instead of rotating it at its centre.
>
> Please help.
>
> Thanks
> Sunny
--
____________________ Peculiar Technologies ____________________
Jon Barrilleaux 3800 Lake Shore Ave. Purveyors of
[EMAIL PROTECTED] Oakland, CA 94610 Alternate Reality
510.444.4370 voc Augmented Simulation
510.444.0231 fax www.augsim.com and 3D Solutions
=====================================================================
To subscribe/unsubscribe, send mail to [EMAIL PROTECTED]
Java 3D Home Page: http://java.sun.com/products/java-media/3D/
