Hi, This must be 3rd or fourth request for outlined coloured polygons in the past couple of weeks (including myself) . Are the j3d people thinking of sneaking a 1.3.001 update giving a PolygonAtributes.POLYGON_FILLED_OUTLINE value?
Regards Mike Mike Goldwater Auric Hydrates Ltd Work: 020 8949 0353 [EMAIL PROTECTED] > -----Original Message----- > From: Discussion list for Java 3D API [mailto:JAVA3D- > [EMAIL PROTECTED]] On Behalf Of David Rush > Sent: 22 March 2002 14:01 > To: [EMAIL PROTECTED] > Subject: Re: [JAVA3D] On-the-fly object editing > > Right first query. I've read some archived posts concerning how to > display more than one PolygonAttribute style at a time i.e. a filled poly > with the edges also visible. I would like something simliar whereby I see > a wireframe with the points/vertices also visible so I can select the > points for dragging. Some alternatives I have seen are: > 1. Some people have suggested duplicating the shape with one for each of > the PolygonAttribute styles. > 2. Another possibility would involve drawing a small sphere/cube at the > position of the vertex ala the IntersectTest demo available with Java3D. > 3. Drawing a 2D image over the canvas3D at the vertex point using > J3DGraphics2D. > > Any thoughts on these methods? I think the second one is probably the way > to go. > > > > > From: David Rush <[EMAIL PROTECTED]> > > Date: Fri 22/Mar/2002 14:46 CET > > To: [EMAIL PROTECTED] > > Subject: Re: [JAVA3D] On-the-fly object editing > > > > This all sounds very promising, but I may need to come back with more > queries. Ta very much. > > > > David > > > > > > > > From: Daniel Selman <[EMAIL PROTECTED]> > > > Date: Fri 22/Mar/2002 01:39 CET > > > To: [EMAIL PROTECTED] > > > Subject: Re: [JAVA3D] On-the-fly object editing > > > > > > David, > > > > > > Some pointers for you. > > > > > > 1. Yes, you can achieve this within Java 3D, and using retained > (scenegraph) > > > mode. > > > > > > 2. You need to set the appropriate READ and WRITE capability bits on > the > > > Shape3D and GeometryArrays for your Geometry. > > > > > > 3. Then use a Picking Behavior with GEOMETRY-based picking. Once you > have a > > > PickResult you can query for the nearest vertex etc. You may want to > think > > > about rubber-banding a group of vertices... > > > > > > 4. Once you've selected some vertices you will need to go into "drag > mode". > > > While the drag is happening you will need to update the GeometryArray > with > > > the positions of the new vertices. You may want to experiment with > setting > > > BY_REFERENCE for your GeometryArrays so that you don't have to copy > the > > > entire vertex position array to-and-fro while the drag is happening. > > > > > > Check out the sample code from my book for some starting points > > > (particularly building blocks for the behaviors you will need to > write). > > > > > > You might also want to look at the skin-and-bones animation example on > the > > > www.j3d.org website, it uses dynamic geometry updates for the > animation. > > > > > > My particle code (also on www.j3d.org, in the CVS repository) uses > > > BY_REFERENCE geometry updates extensively. > > > > > > Best of luck. Let us know how you get along, and if you can make the > > > "PickingDeformationBehavior" general purpose, and share it with us, > all the > > > better! > > > > > > Sincerely, > > > > > > Daniel Selman > > > > > > Author - "Java 3D Programming" > > > http://www.manning.com/selman > > > > > > -----Original Message----- > > > From: Discussion list for Java 3D API > > > [mailto:[EMAIL PROTECTED]]On Behalf Of David Rush > > > Sent: Thursday, March 21, 2002 4:34 PM > > > To: [EMAIL PROTECTED] > > > Subject: On-the-fly object editing > > > > > > > > > Hi there, > > > > > > This is my first post to this list so i hope you guys can help me out. > For > > > my final year project i am implementing a 3D object editor in Java3D. > At > > > the mo it can load objects from various file formats using the > available > > > loaders, and allows for editing of materials, lights, textures etc. > What i > > > am really looking to implement is the ability to dynamically edit the > > > objects by clicking and dragging on the individual vertices. I am not > > > exactly sure how to go about this yet, I have some ideas but i'm not > sure if > > > they are within the limitations set by Java3D. Does anybody have any > > > theories on how i might achieve this? I also have a hunch that to do > this > > > would involve using immediate/mixed-mode rendering but i'm not sure > how this > > > would fit in with the architecture of my program at the moment. > > > > > > Thanks for any help you can give, > > > > > > David Rush > > > > > > > ======================================================================== == > = > > > 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". > > > > > > > ======================================================================== == > = > > > 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". > > > > > > > > > > > ======================================================================== == > = > > 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". > > > > > > ======================================================================== == > = > 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". =========================================================================== 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".
