Game Physics

[Anonymous No.2635637]

So. For this game how would I calculate force of collision between two objects?
Its programmed in XNA, i can grab their velocity as a float or directional velocity as a vector2. Every object also have a mass.

We tried the following equation
Vector2 KineticEnergy1 = objectone's mass * objone's velocity^2
KineticEnergy2 = objectwo's mass * objtwo's velcity^2
result = KE1 + KE2

collisonEnergy = Abs((Ke1 - result) - (Ke2 - result))

[Anonymous No.2635643]

Shameless bump

[Anonymous No.2635654]

maybe you could make their velocity the damage.

[Anonymous No.2635655]

Did you try momentum?
http://en.wikipedia.org/wiki/Collision
Are they elastic collisions?

>>2635643
Can you not bump every 2 minutes in the future?

[Anonymous No.2635657]

The elasticity of collision is .3

[Anonymous No.2635666]

>>2635657
http://en.wikipedia.org/wiki/Inelastic_collision

Use that big equation. Problem solved.

[Anonymous No.2635717]

Sorry, i'm looking for the force of impact, not velocity exiting/entering

[Anonymous No.2635727]

This video should explain everything

http://www.youtube.com/watch?v=YYVXywz_7ck&feature=related

[Anonymous No.2635730]

bump

[Anonymous No.2635731]

>>2635637
of course, i forgot the apply the nyan variable to the equation

[Krakengineer !!5XY+x7grkpt No.2635734]

>>2635637
>>KineticEnergy1 = objectone's mass * objone's velocity^2
>>KineticEnergy2 = objectwo's mass * objtwo's velcity^2
>>result = KE1 + KE2
I think I see the problem. This will only work properly if the vectors of the two object's velocities are exact opposites when they crash. It is possible for two objects to be going really fast relative to the background, but relative to each other much slower because they are both going in roughly the same direction.

Use this:
result = objectone's mass * objectwo's mass * (objone's velocity - objtwo's velcity) ^2

[Anonymous No.2635743]

it seems like the crashes and force reading is a lot more stable now. Thanks.