Thank you very much, mattie!
I guess that I was confused by myself. Your code demonstrated the concepts
of behavior more clearer. it helped me to figure out where I could play a
little trick on top of your idea. It works pretty well. As I said, Java3D
move scene in the X,Z direction in object coordinates only. The trick is
that I specified an extra translation in X for every Z movement of the
scene for the veiwer ( the vector (x,0,z) will be parallel to the viewer's
facing direction), so that it looks like objects move right towards the viewer.
Thanks again!
Lan
At 04:05 PM 8/23/2001 +0200, you wrote:
>Hi Lan
>
>I wrote a mousebehavior class that may help you.
>I also add it to the viewplatformtransform
>you can specify the translations/rotations as you mention (so without
>input from the user).
>However, it is a behavior class that is specifically written for my
>application so it navigates maybe a bit strange for a regular user ;-).
>You can drag yourself forward with the right mouse button while your
>altitude remains the same. So only your x-axis direction affects the way
>you move.
>Middle mousebutton drag changes your altitude and left mousebutton is to
>look around.
>You can also invert the input for rotation and translation and you can
>also set the speedfactors
>I believe it's a good starting point to write your own behavior.
>
>It was my first behavior class , so I don't know if it is really well written.
>Anyone who has comments, please send me a message!
>Also note that I had to replace the middlemousebutton mask with an integer
>since those values don't match. Does anyone know what's the reason for that?
>
>good luck
>
>mattie
>
>8/23/01 3:15:09 PM, Lan Wu-Cavener <[EMAIL PROTECTED]> wrote:
>
> >Since I have not seen any response to this mail, I will give my opinion.
> >This question may be for Java3D team.
> >
> >I wish Java3D provides us with an interface that programmer can specify the
> >x and z translations for the Behavior. This is similar to that a programmer
> >can activate a button press without the user clicking the button.
> >
> >When zooming in any direction, since viewerPlatform roation angle can be
> >accessed by transformGroup, the x and z translation components of the
> >zoomed distance are known. If Java Behavior can take these input rather
> >than those got from user mouse input, the task of zooming in random
> >direction can be achieved by maneuvering viewer transformGroup only.
> >
> >Lan
> >
> >
> >
> >
> >
> >
> >At 03:03 PM 8/22/2001 -0400, you wrote:
> >>Hi,
> >>
> >>I have been struggling with this for a week. I was wondering if any one
> >>having the experience and solution to my problem. Since my 3D scene
> >>contains huge amount of objects, it is faster to navigate the scene by
> >>modifying the viewer's transformGroup. I know that default Java Mouse
> >>Behavior only let me walk in the X, Z direction in the object
> >>transformGroup (coordinates). This works fine when I don't turn around
> >>(rotate around y). Eric website has suggested to do some extra work with
> >>object transformGroup to deal with viewing in random angles.
> >>
> >>My question is that is it possible to avoid touching the object
> >>transformGroup, but work with viewer's transformGroup solely to achieve the
> >>neviagting in any direction?
> >>
> >>Thanks in advance!
> >>Lan
> >>
> >>Lan Wu-Cavener
> >>Research Associate and Programmer
> >>Dept. of Landscape Architecture
> >>
> >>===========================================================================
> >>To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
> >>of the message "signoff JAVA3D-INTEREST". For general help, send email to
> >>[EMAIL PROTECTED] and include in the body of the message "help".
> >
> >Lan Wu-Cavener
> >Research Associate and Programmer
> >Dept. of Landscape Architecture
> >
> >===========================================================================
> >To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
> >of the message "signoff JAVA3D-INTEREST". For general help, send email to
> >[EMAIL PROTECTED] and include in the body of the message "help".
> >
>
>
Lan Wu-Cavener
Research Associate and Programmer
Dept. of Landscape Architecture
===========================================================================
To unsubscribe, send email to [EMAIL PROTECTED] and include in the body
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