How To? Airwave

[Carli]

Hi,

i want to implement an explosion into my game and i wonder how to realize an airwave.

- what is the optimal way to implement an object finder without scanning the whole map
- how can I check if an object is hidden by another one

[JernejL]

Hi,

i want to implement an explosion into my game and i wonder how to realize an airwave.

- what is the optimal way to implement an object finder without scanning the whole map
- how can I check if an object is hidden by another one

NewtonWorldForEachBodyInAABBDo is very efficient spatial body search for events like explosions that you desire to simulate.

[PJani]

quick question, its in my ToDo list.
how can i calculate a approximated box(which approximate collision of some body) surface which will be hit by an explosion air wave. The pressure explosion unleashes is in N/m^2 that why i want to get approximated surface of body?

[JernejL]

quick question, its in my ToDo list.
how can i calculate a approximated box(which approximate collision of some body) surface which will be hit by an explosion air wave. The pressure explosion unleashes is in N/m^2 that why i want to get approximated surface of body?

You could use the support vertex functionality to get a approximate silhuette surface size from a particular angle, but that would not properly take into account if a object is hidden behind another object, etc..

[Julio Jerez]

LIke delfi say, you can use the support vert function, check the ogrenet wraper.
but even faster that tha will be get AABB, since the AABB do not have to be exact.

the good thing about using the suppport vertex is the you do not need to use a AABB you can use the cross setion of the face facing the shock wave of the explosion.
bacially you can get a quad of a triangle perpendicular to the direction of travel of the explosion and use the area ad a mesure of the impact force..
that way big objects will get more of the shock wave than small objects .