is there a way for kinematic & kinematic or static & static collisions?

kontinyu

Hi, i would like to get collision data (1st and 2nd bodies etc.) from kinematic or static bodies.
I know by the rule we can't get them collided with each other. they only respond to dynamic bodies.
Also i'we looked at AABB methods but they aren't accurate as much as i need.
Right now i'm usin dynamic bodies at 0 gravity. but sometimes they just overlap start moving. thats unacceptable for me.
What are your suggestions?

hgvyas123

you can create one dynamic body and use weld joint of that with kinematik or static body

and if your body are not polygon then go with tntcollision

kontinyu

well i read about that too. but i'm gonna have 300-500 physics object on my scene.
it's heavy alone by itself. wouldn't be too hard for mobile devices to handle that much of bodies and welds etc?

about other option; i don't know much about tntcollision. is such thing possible with it. is it easy to use & understand?

hgvyas123

yup easy to understand and perfect if you dont need physics simulation on the other hand 300-500 object per scene means not on the screen at the same time right?

kontinyu

nope, they are all in the same scene simultaneously. But they are not moving so it's not THAT hard to simulate. actually they are all bits of a "tree" i need collisions only to check whether branches and leaves overlapping or not.
i will check tntcollision.
what do you mean "if you dont need physics simulation" ?

twisttap

@kontinyu if you do not need and forces/impulses etc. related to physics but your only aim is to check for collisions then tnt is better then box2d.

john26

I agree with @twisttap. Dynamic bodies are the raison d'etre of Box2D. The other body types are just there to support them. If a kinematic body passes through a static body, for example, I don't think Box2D even regards this as a collision. So it is impossible to obtain collision information. It might be a good idea to ask on the Box2D forum as well...

hgvyas123

By physics simulation i mean moving the objects with help of box2d like with the help of gravity or setlinearvelocity or applyforce from your post it seems like you dont need that.

kontinyu

i will check tnt. thank you all guys.

twisttap

@kontinyu Are you writing a tree grow algorithm ?