APE 2d Physics Engine in ObjectPascal...

Back in 2009, I converted the 2d alpha-stage physics engine APE, from Flash ActionScript to Object Pascal (FPC and delphi). This engine was initialy wrote by Alec Cove (his site, http://www.cove.org/ape/ doesnt not response anymore - Where are you Alec ? ;))

I put this work today on GitHub because, even some years laters, somebodies asked me if I always got the source : Effetively, this engine is a good start to teach secret behind computer 2d physics. So, It is here for archive.

I made first conversion version from "raw action script", the original one could be found now on several ActionScript dedicated web site. On historical APE site, there was Java and c++ conversion too.

I'll release now this code as is, perhaps it could be usefull for somebody ? I think It could be cool for a 2d casual game, or, as I said, just for teaching purpose : When I translate this code, I do not change Alec's original architecture, which I found right and solid : I feel the Original ActionScript code very well written : try to keep its Object Model in Pascal version. Warning : This engine is quite old front of today's standart, if you look for a fats 2d engine, see elewhere. (In this one, for keep it simple for teaching reason, there are no optimzation.

The base concept is simple :

On grouping Particles with constraints, you'll build model with a real physical response, then, you register Collision interaction and you'll get a "physical Word"

quick Features :

• Circles, Rectangles and Wheels particles.
• Spring constraints.
• Groups processing.
• Groups Collision.

Pure ObjectPascal :

• Lazarus (LCL on Win64/32 and Linux Arm tested) (Required FPC 3+)
• Delphi (VCL and FMX) are available. (should work from delphi7+ under VCL)

Here the looks of Pascal Version, in Delphi (FMX) :

ScreenShots : (Delphi/FMX)

Ape in action with original Car Demo

Demo available

See "Car" examples, which is the original demo provide by original author.