Is my reasoning and/or expectations incorrect? Is there a chance
that I could use MouseRotate the way I'd like to?
Thanks
- Victor
>From: Victor Raymond <[EMAIL PROTECTED]>
>Reply-To: Discussion list for Java 3D API <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED]
>Subject: Re: [JAVA3D] MouseBehavior.INVERT_INPUTS
>Date: Tue, 2 Nov 1999 13:36:16 CST
>
>I am probably making some fundamental mistake, but here is
>how I understood things to work. Please correct me if I'm
>wrong.
>
>In the graph below (view with mono-width font)
>
>T = content side transform
>Tv = View Transform
>S = Content Scenegraph
>VP = View Platform
>
>
> Locale
> |
> _________________
> | |
> T Tv
> | |
> S VP
>
>The composite model-view transform is Inverse(Tv)*T.
>If T and Tv are Identity matrices to begin with, changing
>T, to say T1, is the same as changing Tv to Inverse(T1).
>
>If the above is correct, then modifying Tv seems preferable,
>since this would allow me to have different views on to the
>same content-scene.
>
>Since I was using a SimpleUniverse for which Tv is the identity
>matrix to begin with, I was (perhaps naively) assuming that
>a MouseRotate which modified T should be the same as a MouseRotate
>which modified Tv but did the inverse.
>
>Thanks.
>
>(Dennis, by "documentation" in my original e-mail, I meant the
>detailed javadoc stanza for MouseBehavior.INVERT_INPUT. Not the
>tutorial. The tutorial is excellent and has helped me a lot in
>understanding Java3d).
>
>- Victor
>
>
>>From: "Andrew R. Thomas-Cramer" <[EMAIL PROTECTED]>
>>Reply-To: "Andrew R. Thomas-Cramer" <[EMAIL PROTECTED]>
>>To: [EMAIL PROTECTED]
>>Subject: Re: [JAVA3D] MouseBehavior.INVERT_INPUTS
>>Date: Mon, 1 Nov 1999 09:46:53 -0600
>>
>>When you manipulate the view platform's transform, it's not the
>>scene that changes, it's the view. If by "same result"/"same
>>behavior", you're seeking the scene to change, I'm not sure how you
>>would do that by manipulating the view.
>>
>
>>
>>-----Original Message-----
>>From: Victor Raymond <[EMAIL PROTECTED]>
>>To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
>>Date: Friday, October 29, 1999 6:46 PM
>>Subject: [JAVA3D] MouseBehavior.INVERT_INPUTS
>>
>>
>> >Most of the Java3D example programs allow rotation of the scene by
>> >adding a MouseRotate which manipulates a top-level TransformGroup
>> >on the content side of the scenegraph
>> >
>> >I need to manipulate the View Platform's parent Transform
>> >(on the view side of the scenegraph) and achieve the same result.
>> >The Java3d documentation seems to suggest that all I'd have to
>> >do is use a MouseRotate constructed with the INVERT_INPUTS flag
>> >and have this manipulate the View Platform's Transform.
>> >
>> >This doesn't provide the same behavior.
>> >
>> >What should I be doing?
>> >
>> >Thanks.
>> >
>> >- Victor
>> >
>
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