skyraptor/densitywaves-php

DensityWaves PHP - Generate star positions based on density wave theory.

0.0.1 2022-03-11 20:03 UTC

BSD-2-Clause

• Patrick Henninger

• php
• theory
• wave
• density
• waves
• density wave theory

README

From Wikipedia:

"Density wave theory or the Lin–Shu density wave theory is a theory proposed by C.C. Lin and Frank Shu in the mid-1960s to explain the spiral arm structure of spiral galaxies."

This is a re-implementation of the beltoforion article & project.

Installation

You can install this package using composer:

composer require skyraptor/densitywaves-php

Usage

Simply inizalize the Galaxy with the appropiate parameters. You can then age it as you desire and access the stars with getStars().

Example:

use DensityWaves\Galaxy;
  
...
  
$radius = 1000;
$galaxy = new Galaxy($radius, round($radius * 0.25), 0.00015, 1.2, 1.02, 1, 40);
$galaxy->age();

You will have to play with the parameters to get good results. Check the browser version for an idea of how it does work: Procedural generation of spiral Galaxies