I mean that once a given axis in space is fixed by the user, then all
subsequent mouse-dragging motions are mapped to rotations of the
target TransformGroup around that fixed *axis*.
For example, in the special case in which the fixed axis is the
y-axis, then all mouse-dragging motions would map to rotY transforms.
If the fixed axis is of the form (1, 1, 1) + (0, t, 0), where t ranges
over the reals, then the mouse dragging motions would map to a
translation from (1, 1, 1) to the origin (or to any point (0, u, 0)),
followed by a rotY, followed by a translation back to (1, 1, 1),
i.e. a rotation around a fixed axis through (1, 0, 1) parallel to the
Y-axis.
I am interested in the general case in which the fixed axis can have
any orientation in space, and doesn't necessarily go through the
origin.
KJ
Date: Wed, 27 Jun 2001 12:05:31 +0800
From: Chris Thorne <[EMAIL PROTECTED]>
Arbitrary axis or arbitrary point in space *and* a specified axis?
Chris
Kynn Jones wrote:
> I need to map mouse-dragging motions to rotations around an arbitrary
> axis (not necessarily through the origin). Does anybody know where I
> can find code (preferably some extension of MouseRotate or
> MouseBehavior) to do this?
>
> Thanks,
>
> KJ
>
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