PhysicsBody and Sprite3D

cocos2d-x C++
1

Hello Community!
Can some one help me understand how i can create Sprite3D with physicsbody.
My 3d object loads well, if i create simple box i dont have any issue with simple phisics like Circle.
But if i load maked in Bleder model. Physics Body does not show and works.
I use Cocos2d-x v 3.8
Example of code:

myObj = Sprite3D::create("3ds/myObj.c3t");
myObj->setForce2DQueue(true);
myObj->setPosition( Point( visibleSize.width / 2 + origin.x, visibleSize.height / 2 + origin.y ) );

auto myBody = PhysicsBody::createCircle( 100, PHYSICSBODY_MATERIAL_DEFAULT );
myBody->setCollisionBitmask( MY_COLLISION_BITMASK );
myBody->setContactTestBitmask( true );
myBody->setDynamic(false);
myObj->setPhysicsBody( myBody );
layer->addChild( myObj, 1000 );

But this does not work.
I check using

scene->getPhysicsWorld( )->setDebugDrawMask( PhysicsWorld::DEBUGDRAW_ALL );
2

We can’t see the problem in this part of code, you are showing the code for one static object with a collision mask. The only thing I can say is that you are probably using an incorrect mask.
This is the second time I see setContactTestBitmask( true ); in this forum. A mask is an integer not a boolean.

3

Okey, i found what happen, my 3d sprite have more that one object in. So i think cocos2d-x does not know where hi must spawn my PhysicsBody. Elso i dont understand but, my 3d object have right center of coordinate, but cocos spawn PhisicsBody not on center of object.

Elso i have a question,
will 2d objects collide with 3d?
if i use setForce2DQueue(true);
or this does not metter? Because its is not work for me right now.

sorry for my bad english.

4

Can some one give me example, how create PhysicsBody from Mesh of Sprite3D ??

5

If you want 3D physics you should use bulletPhysics library, otherwise you can still use box2d for 2D game with 3D graphics.

1 Like
6

Okay, i’m understand, thank you!