[JASS] A little physique engine

[IaMfReNcH]

Here is a little physique engine for WC3 wrote in vjass.

It include a little escape demo wich you play with arrow keys

It does a computation of dynamics with some parameters you can specify like
-gravity
-air density (used in air friction, but I didn't really tested it)
-refresh period

this works by a structure that you can extends as shown in the "How To Use" trigger and the escape demo

While updating it does call two stub functions.
-in the first, you may return the sum of your forces
(weight and ground reflection will be computed by the engine then, so don't compute them yourself)
you can also add misc stuff

-the second is called once the destination is computed, but the units isn't yet moved, so you can perform collision detection (not yet provided in, sorry)
move the camera, and so on


Hope it'll help you making good maps. Please report me bugs and/or code correction if you do. Also report me if I did a mistake in the code.

 

[Hijax]

firstly post stuff like this in the JASS resources submission forum.

secondly, some feedback:
i like the system. however, there is a bug. if you stand between two small 'tops', you will be caught there and unable to move.

 

[IaMfReNcH]

yes, because of gravity. And there aren't as small as they looks if you change your camera, you'll see how hudge they're. To solve, you can change the bound factor to 1.0

or you can unpause the unit when his speeds get slow (but you shall check it isn't jumping)
but then the question is when to pause it again ?

But maybe smoothing curves will be an efficient solution

 

[ap0calypse]

1. Do not overuse color commands, maybe use a subtle color for the title, but don't use color codes for the rest, it hurts my eyes.
2. This doesn't belong in this section, post in in the spells-section as a system.
3. Create a function that if the unit is stuck, you can use the jump-spell again, otherwise it's pretty useless since I got stuck all the time.

 

[WraithSeeker]

Shouldn't gravity be -981 and what is with those BJ?

SEE Simple Entity Engine does most of this pretty well.

 

[IaMfReNcH]

here is the correct place now, sorry for this topic

http://www.hiveworkshop.com/forums/submissions-414/physic-engine-132407/#post1175999