hmm, thanks a lot for replies from both of you! It's surprising though that gluUnProject didn't work.
There is a comment in MatrixTrackingGL.java * Note: the actual matrix may differ from the retrieved matrix, due * to differences in the way the math is implemented by GLMatrixWrapper * as compared to the way the math is implemented by the OpenGL ES * driver. Maybe that's why? On Feb 26, 8:59 am, Streets Of Boston <flyingdutc...@gmail.com> wrote: > I had similar issues: > - Where to obtain the model-view and the project-view matrices. > - gluUnProject did not seem to work... it returned results i did not > expect. > > I solved these issues: > - I borrowed code from the MatrixGrabber.java you can find in the "API > Demos" examples. This class contains methods to obtain the project and > model view matrices. > - I wrote my own gluUnProject, based upon a C-implementation i found > on the internet. > > Gotohttp://soft.antonspaans.comand leave me a message there and i > can send you the java source code for gluUnProject. > > On Feb 24, 8:10 pm, focuser <linto...@gmail.com> wrote: > > > Hi, > > > I'm trying to convert window coordinates to object coordinates. > > There's a gluUnProject in GLU class, which requires current modelview, > > projection matrices and viewport. > > > My question is how to get those matrices? I tried gl.glGetIntegerv > > (GL11.GL_MODELVIEW_MATRIX_FLOAT_AS_INT_BITS_OES, model, 0); and > > ((GL11) gl).glGetFloatv(GL11.GL_MODELVIEW_MATRIX, modelf, 0); > > > but the first one returns an array of zeros, and the other one just > > shows an "method not implemented" error. > > > Is gluUnProject the correct method for this purpose (i.e. window > > coordinates --> object coordinates) ? --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Developers" group. To post to this group, send email to android-developers@googlegroups.com To unsubscribe from this group, send email to android-developers-unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/android-developers?hl=en -~----------~----~----~----~------~----~------~--~---
