Physics-Balls

Balls of one size on a flat surface with friction: walls they bounce off, nose
points they rattle against, gates they drop through. An event-based analytic
engine in C, perl-free, with an XS door and a versioned C ABI (include/pb_abi.h)
so another module can roll balls with no Perl frame in between. It knows
nothing about any game; a pool or snooker adapter describes its table, sends a
strike as integers, and reads back the contacts in order, the rest layout, the
balls that dropped, and the trajectory as segments a client plays back.

Since 0.03 a ball may curve, by its kind: a curling stone or a biased bowl runs
as a chain of parabolas that bends, with no trigonometry anywhere, and a shot
may say the surface under the struck ball changes partway down its run. The
turn rate is a house law with fitted constants, not a model of ice. A world
that declares no kinds is exactly what it was.

The same inputs give the same doubles on every platform that keeps IEEE
arithmetic honest. The build turns off fused multiply-adds for that reason, and
the fixtures under t/ were recorded by the JavaScript prototype the engine was
transliterated from.

INSTALLATION

To install this module, run the following commands:

	perl Makefile.PL
	make
	make test
	make install

A C compiler is needed. ExtUtils::Depends installs the ABI header.

SUPPORT AND DOCUMENTATION

After installing, you can find documentation for this module with the
perldoc command.

    perldoc Physics::Balls

LICENSE AND COPYRIGHT

This software is Copyright (c) 2026 by LNATION.

This is free software, licensed under:

  The Artistic License 2.0 (GPL Compatible)