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I'm develop a Box2d game with cocos2dx 3.1.And the version Box2d in cooc2dx 3.1 is 2.3.0. Before this,I have test my game in the "Tests Framework" of Box2d downloaded from the github. The version of Box2d is 2.3.0 too. I add a "car" in the game and when press the keyboard.It will...

The problem has been fixed!Although i don't the reason.
I change my cocos2dx version from 3.3 to 3.1.So it works well.
If someone have this problem can try this method.

Thank you iforce2d. Thank you for your patience and help all the time.

Thank your for reply. All the input values is set in the RUBE. I don't do anything after the .json file loaded. "can't be loaded" means:sometimes when l load the .json file on the android.The app maybe crash on the function "world = json.readFromString(content, errMag);". I think...

Thank your reply.I found the reason. Because i add too many body in the World.If add small numbers bodies it will be run well!! If i add too many bodies it will be NaN!! But why? why the Box2d C++ on android have this problem?How did you guys fix this problem? And when i use the RUBE to build Box2D ...

hi guys I have problem about the Box2D c++ on android. I use the coco2dx to build my game.It run well in the win32. But when i put it on the android.It will be crash. I found the Box2d world-step() cause the values become NaN I don't know how to debug the C++ on eclipse.So i use the CCLOG.(anyone ca...