Problems with 3D models in Android about ofxbullet

[johansebastian]

by the way. This version of ofxBullet was adapted to work in Android:

https://dl.dropboxusercontent.com/u/14347919/ofxBullet.zip

basically, incompatibilities with openGl and openGL ES were deleted and then everythink worked.

[NickHardeman]

HI, Thank you for pointing this out. It looks like it might be an issue with Assimp. If you set i < 1 in the for loop does that work? I don't have an Android device, so I can't test for it. Thanks for the link to the Android compatible version, checking it out now.

[johansebastian]

well... that doesn't seem to work.

i've tried with 10 diferent models and things work fine with one, and goes completely messy with the other 9.

things are really not making sense right now.

we'll keep trying and post if we find some solution.

[johansebastian]

anyway, the model that works returns 4k meshes with getNumMeshes, which doesn't make sense because it has two meshes.

[johansebastian]

Hi!

i've figured out what was happening with Android and ofxBullet.

You'll see one of these shapes is centered. That was working properly. Other shapes whose center is not (0,0,0) don't draw properly. The ofXBulletcustomShape stays in the right place, but invisible. The drown element, the Assimp translated gl matrix or whatever is drown, behaves as if it's centroid was located in the center of the 3Ds scene, not the object's center.

conclusion: assimp "drown" object's anchor point is not it's own but the scene one.

to use 3ds models then, i just created a 3ds project for each object and placed them in the (0,0,0).

does this behaviour make sense for you?

thanks for the add-on by the way!

[NickHardeman]

That makes sense. Maybe there is a way to offset the shape by the scene center pt? Glad you found a solution that works.

Nick