Dear EgonOlsen,
Thanks for your response.it helps me a lot.
First, in the answer to your question, I want both Android and Windows-based applications. Since I am new to Java and JPCT and am a little afraid of Android, I decided first complete the Windows-based application then starting the more important application in Android. (Android app is the main program I want and I plan to rotate both models using only one touch of finger rather than mouse movement).
I don't know maybe I could complete the Android application first and then run that Android application in Windows using some emulator or players, I don't know, do you have any opinion?
Second, I have an IDE called "Netbeans" with my JDK and now I have both "Netbeans" and "Eclipse". What IDE should I use?
Third, You mentioned a very important point about camera perspective. before you said about this, I was thinking to load both models side-by-side and in ONE environment. But as you said, using one environment for both models, causes a little difference in view angle of each model and I don't want that. I want both models to look the same as far as it is possible. therefore, Now I have to change the plan and use two separated 3d spaces (two separated border-less windows) each one loading one of the models. what's your idea, is this possible?
Fourth, Here rises another question. is it possible to have two separated 3d worlds and rotate them simultaneously using only one finger touch (or one mouse drag)?
Many thanks for your help.
Best,
Reza