Thanks for replies. but the thing is.. everyone says that. there is a plenty of info. I am familiar with the idea however I have a problem with implementation of gluUnproject into Kube project in Android API example (included in SDK)..
My question is.. is there any simple example program that I could read through? or better question is there any tutorial that learn how to do that in correct way? Thanks, Luke On Oct 28, 4:36 pm, Streets Of Boston <[email protected]> wrote: > Search for 'gluUnproject' on this forum. > You'll find plenty of info for mapping 2D touch-screen coords to > your3Dworld-coords. > > There is still work left to figure out what is being picked given3D > world-coords: > > Map the (sx,sy,0) screen coordinate (close plane) to the3Dworld- > coord (wx1, wy1, wz1) using gluUnproject. > Map the (sx,sy,1) screen coordinate (far plane) to the3Dword-coord > (wx2, wy2, wz2) using gluUnproject. > > Then create a line from (wx1, wy1, wz1) to (wx2, wy2, wz2). > > Then calculate the earliest point on that line that intersects an > object in your3Dworld. That is the object the user picks. > > Brush up on your geometry classes, open up those books again from > class or google around a bit. :) > > On Oct 28, 11:14 am, TreKing <[email protected]> wrote: > > > > > > > > > On Thu, Oct 28, 2010 at 5:12 AM, Lukasz.Iwanski > > <[email protected]>wrote: > > > > well.. huge problem with selecting object in3Dspace by gluUnProject.. > > > actually still have. > > > That's usually termed "picking" and there should be a ton of info on the > > interwebs. Besides that, you still have not provided a specific issue you're > > having trouble with besides the broad "basically I need allow user to use > >Kube" statement, so you're not going to get much more help. > > > --------------------------------------------------------------------------- > > ---------------------- > > TreKing <http://sites.google.com/site/rezmobileapps/treking> - Chicago > > transit tracking app for Android-powered devices -- You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-developers?hl=en
