Well, you'll need to modify it considerably for that, but it is do able. On Sun, Jul 8, 2012 at 11:31 PM, santy <[email protected]>wrote:
> Yes. I have already tried that code and it works fine, but that is only > for loading models, and I need to place them in the virtual space around > the device. Anyway, thank you very much Raghav > > > > El domingo, 8 de julio de 2012 19:55:18 UTC+2, Raghav Sood escribió: >> >> AndAR has a sample app capable of loading some obj/mtl models. See >> http://code.google.com/p/andar >> >> On Sun, Jul 8, 2012 at 10:35 PM, santy >> <santiago...@**gmail.com<[email protected]> >> > wrote: >> >>> I´ve been trying and studying some examples but I don´t have >>> OpenGL knowledges enough to implement what I need. I´ve been trying with >>> Junaio too, but It doesn´t fit to my project. I tried with LookAR too, but >>> the resolution is very low. Is there any framework, as LookAR, that can do >>> easily what I need? (I am not an expert in OpenGL) >>> >>> Thank you >>> >>> >>> >>> >>> El jueves, 5 de julio de 2012 20:33:27 UTC+2, Nobu Games escribió: >>> >>>> With that device rotation matrix you can only rotate your objects >>>> around the screen, where the rotation center point is the center of the >>>> device. This is independent of GPS location coordinates, and as the name of >>>> that matrix suggests, it is really rotation only, not translation (moving >>>> around the objects on any axis). >>>> >>>> >>>> But to answer your question: yes, it is possible to just use the sensor >>>> data without GPS and have 3D objects move around on the screen. And it will >>>> work well for most use cases, like augmented reality games where you >>>> usually sit as a player and move the camera around. >>>> >>>> If you need to change the positioning of the 3D objects according to >>>> the current device location and movement, it gets a bit more complicated. >>>> >>>> You could make use of the GPS coordinates for translation but it >>>> wouldn't be real time suitable, because GPS alone is usually not precise >>>> enough. You need to combine several sensors (including the camera) for >>>> making an augmented reality app possible that gives a seamless experience >>>> and allows the user to freely walk around. >>>> >>>> You could make use of acceleration sensor data for getting an idea of >>>> the current device / user movement direction. With that information you >>>> could predict a translation until the next GPS location update gives you >>>> certainty about the current location. >>>> >>>> You also could make use of realtime image analysis for calculating the >>>> current movement direction based on changes in the video preview frames. >>>> >>>> >>>> >>>> On Thursday, July 5, 2012 1:11:20 PM UTC-5, santy wrote: >>>>> >>>>> Thank you very much Nobu. And is it possible to place the 3D object >>>>> just to see the object with the camera on its position without using the >>>>> GPS??? >>>>> >>>>> >>>>> El jueves, 5 de julio de 2012 20:02:03 UTC+2, Nobu Games escribió: >>>>>> >>>>>> On Thu, Jul 5, 2012 at 12:47 PM, santy wrote: >>>>>> >>>>>>> Yes, of course I have been trying with all the frameworks I have >>>>>>> found (LooakAR, min3D...) and I am sure I can do what I need with them >>>>>>> but >>>>>>> I don´t know how. I wrote here in order to find someone who has done >>>>>>> exactly the same I have to do (there must be a lot) and to know how they >>>>>>> did it (I need a tutorial that explains it or some advices). >>>>>>> >>>>>>> Thanks >>>>>>> >>>>>>> >>>>>>> El jueves, 5 de julio de 2012 19:40:21 UTC+2, Nobu Games escribió: >>>>>>>> https://www.google.**co**m/search?q=Android+**Augmented+**Reality<https://www.google.com/search?q=Android+Augmented+Reality> >>>>>>> >>>>>>> >>>>>> You need to make use of SensorManager and register a SensorListener >>>>>> in order to construct a device rotation matrix. Luckily Android already >>>>>> provides a method that calculates that matrix which is ready for use in >>>>>> OpenGL: >>>>>> >>>>>> SensorManager.**getRotationMatri**x()<http://developer.android.com/reference/android/hardware/SensorManager.html#getRotationMatrix%28float[],%20float[],%20float[],%20float[]%29> >>>>>> . >>>>>> >>>>>> *This matrix is ready to be used by OpenGL ES's glLoadMatrixf(float[], >>>>>>> int)<http://developer.android.com/reference/javax/microedition/khronos/opengles/GL10.html#glLoadMatrixf%28float[],%20int%29>. >>>>>>> * >>>>>>> >>>>>>> * Note that because OpenGL matrices are column-major matrices you >>>>>>> must transpose the matrix before using it. However, since the matrix is >>>>>>> a >>>>>>> rotation matrix, its transpose is also its inverse, conveniently, it is >>>>>>> often the inverse of the rotation that is needed for rendering; it can >>>>>>> therefore be used with OpenGL ES directly. * >>>>>>> >>>>>> You also may want to implement an algorithm that reduces the noise >>>>>> from the sensor data, otherwise the 3D objects will jitter on the screen. >>>>>> The simplest approach is calculating a median and / or weighted average >>>>>> over time. >>>>>> >>>>> -- >>> 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 <[email protected]> >>> To unsubscribe from this group, send email to >>> android-developers+**[email protected]<android-developers%[email protected]> >>> For more options, visit this group at >>> http://groups.google.com/**group/android-developers?hl=en<http://groups.google.com/group/android-developers?hl=en> >>> >> >> >> >> -- >> Raghav Sood >> Please do not email private questions to me as I do not have time to >> answer them. Instead, post them to public forums where others and I can >> answer and benefit from them. >> http://www.appaholics.in/ - Founder >> http://www.apress.com/**9781430239451<http://www.apress.com/9781430239451> - >> Author >> +91 81 303 77248 >> > -- > 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 > -- Raghav Sood Please do not email private questions to me as I do not have time to answer them. Instead, post them to public forums where others and I can answer and benefit from them. http://www.appaholics.in/ - Founder http://www.apress.com/9781430239451 - Author +91 81 303 77248 -- 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
