How to Check Collision between two Animated Models

[Toovy]

hi!

if you are creating a Beat'm Up game just one idea comes to my mind. I think you could create invisible boxes and append them to a fix point on the mesh, for example the hand. (like when attaching a weapon to a mesh, maybe as a subnode of the node) Then, because the box always moves with the mesh's hand, you could check for the collision between the invisible box and the invisible boxes on the other mesh (e.g. the head box).

The same principle is used in some shooters to check with part of the body is hit by the bullet.

I don't know how to attach something in irrlicht, but maybe it helps .

good luck!

[Dorth]

Actually, depending of the details required, Dances' idea is likely the best. But again, nothing beats a physic engine. Now, would anyone know how to split the faces of a model in different collision group based on their vertex color, or some other trick you might know? (actually, I can assign the vertice/triangle to the physic engine just fine I just need the way to split the model parts based on in-model info ^^)

[smartwhiz]

u mean... a ray with a distance in front would be a better one..(that means only in the angle which the ray is projected will be detected???) i don't think so... well everyone has their own opinion...

@Toovy: thats wht i meant which every mesh u want hav a bounding box to it... will giv u an accurate collision detection...

afterall how much ever the argument goes on ... its the final runnin code that wins... kiran show us which is gud enough!!! and thats a challenge for u... hehehehe

[kiranmaya]

problem is solved by

Attaching invisible boxes to joints of animeted meshes,
smgr->addAnimatedMeshSceneNode(smgr->getMesh("media/box.x"), jointName);

and checking if boxes are in collision by

Code: Select all

bool intersectsWithBox (const aabbox3d< T > &other) const

[Dorth]

Or better yet, to make a non aabb box (so a simple box) in-between 2 oints, since often this is closer to the effect looked for.

Code: Select all

         |----------------------------------|
Joint A *|  Box that will detect collision  |* B Joint
         |----------------------------------|

thus you get whichever part was in-between collided ^^