Collision parameters

[AggrorJorn]

Inside the collisionhook parameters we can access the normal and the position:

• void CollisionHook(Entity* entity0, Entity* entity1, float* position, float* normal, float speed)

  
  

Shouldn't the normal and position be Vec3? If not, can someone explain why they are floats instead of vec3?

 

 

I want to calculate the perpendicular (which is the normal) vector on two given vectors, which I can easily do with the velocity and the collision position. I use the cross product to do this but that would require an actual position and not a float.

[Furbolg]

Then create a Vec3 and fill it with position[0] (x) position[1] (y) and position[2] (z), tada

[AggrorJorn]

Thanks for answering,

 

I am not sure what you mean with 'fill it'. With what data? I could get the position of the objects colliding but those are not the position of colliding

[Rick]

Those parameters are arrays. Well they are pointing to an array so position[0] = x, position[1] = y, position[2] = z I believe. I don't know why Josh did it this way instead of just making them Vec3 types instead.

[AggrorJorn]

A like that. thanks Rick and furbolg.

[Tim Shea]

You probably don't want to take the cross product of the position and the velocity, but rather, the delta between the collision position and the object position crossed with the velocity. That is possibly also why position is given as a float* rather than a Vec3, as position is a point not (directly) a vector.