Zscript PhysX/Havok/Bullet

[Apeirogon]

I wish bring in gzdoom some basic mechanics from first several pages of any textbook of physic, like inertia, impulse, ground/water/air friction, etc.

For this I need add to engine concept of force or acceleration.

But before adaptation of vectors analysis for zscript, I want to know is there are workaround in zscript that I can use for this?

[Rachael]

It's quite unlikely that you'll ever be able to bring "true physics" to the Doom engine, but that being said, all objects have a concept of mass and velocity, and a simple multiplication of those is your total force in a given direction.

Inertia is simply a colliding object's mass - if you remember Newton's third law, where every action must have an equal and opposite reaction, that simply means that colliding with another object will basically swap momentums - providing the collision is head-on. It gets a little more complicated when it's a grazing and not a head-on collision - then it involves friction, and extra stuff like that, which gets a lot more complicated.

Everything in physics can be expressed mathematically, as long as you remember Newton's laws.

[Gutawer]

but that being said, all objects have a concept of mass and velocity, and a simple multiplication of those is your total force in a given direction.

Force is equal to mass * acceleration, not mass * velocity - that's momentum. An object with constant velocity has no forces acting on it - that's Newton's first law.

[Rachael]

True, thanks for clearing that up.

[Kotti]

not mass * velocity - that's momentum.

Not according to vanilla Doom "physics"...