Android Question Draw and rotate 3d bodies

[Aliaksandr Martsinkevich]

Hello!
I would like to do for my app generation of pictures like that:

As I think, best solution draw object and rotate it, but... I read all topics about 3d cubes and didn't find working example. Are there any libraries to do that easily? Unfortunately my programming skill lower than low...
Thanks!

 

[eps]

What's the end goal? Game, utility, pre-defined objects or drawn by the user?

 

[TILogistic]

in the forum there is a lot of information about 3D.

Search:

Search Results

www.b4x.com

Sample;

[XUI] 3D, rotations and pivots

So far I've used the native Android commands to rotate the views according to the X, Y, and Z axes. The native commands let you change the X and Y coordinates of the Pivot point and get this. But to get a rotating cube it is not enough to be able to rotate on three axes but you have to be...

www.b4x.com

 

[Star-Dust]

[BAX] [XUI] SD XUI_View3D

I created a library to display polygons in 3D. It is also possible to use it to create 3D XUI views. This library can be used to create 3D models from code or load them from obj files. To create a 2D drawing app, to create games, animations, introductions, and 3D effects You can find a detailed...

www.b4x.com

 

[Aliaksandr Martsinkevich]

What's the end goal? Game, utility, pre-defined objects or drawn by the user?

Utility. It's a mental rotation task. I need show to user two pics, rotated and non rotated (sometimes it'll be another object) and record time necessary for answer.


oparra, Star-Dust, thank you, I'll take a look now!

 

[derez]

An old one one from 2014 https://www.b4x.com/android/forum/threads/3d-bodies-four-libraries.48373/post-300809

 

[eps]

So they're asked to rotate the non-rotated one to be the same as the rotated one? or vice versa? Not sure how you'd detect that - although possibly with some coarse granularity on the movement permitted and a bit of leeway.

I like babylonjs for 3D stuff, but it's a bit of a departure from where you are.... So might be overkill and would be browser based at that point. As always it's more down to what you're comfortable with using or understand.

 

[Aliaksandr Martsinkevich]

An old one one from 2014 https://www.b4x.com/android/forum/threads/3d-bodies-four-libraries.48373/post-300809

Wow, thank you, derez!
I have tried your examples, but didn't understand system of coordinates, and b4ppc app crashed on win8.1. Could you tell me please where I can read about vertices numbering?
Sorry for stupid questions, I have no any experience in 2D/3D, I'm statistician

 

[Aliaksandr Martsinkevich]

So they're asked to rotate the non-rotated one to be the same as the rotated one? or vice versa? Not sure how you'd detect that - although possibly with some coarse granularity on the movement permitted and a bit of leeway.

I like babylonjs for 3D stuff, but it's a bit of a departure from where you are.... So might be overkill and would be browser based at that point. As always it's more down to what you're comfortable with using or understand.

There are few ways: object and same rotated object; object and slightly different rotated object. Patient should answer: match or not match. Response time and correctness of answers than will be used to measure cognitive state. Apologize for my language, I'm not a native speaker...

 

[eps]

Ah, so you're not requiring them to rotate them, just answer if the objects are the same, but one is rotated a bit?

XUI stuff should work fine for this.

 

[Aliaksandr Martsinkevich]

Ah, so you're not requiring them to rotate them, just answer if the objects are the same, but one is rotated a bit?

XUI stuff should work fine for this.

Exactly! I need rotation just to produce pictures