Tommy Ettinger tommyettinger

⚙️

Keeping the commit streak alive

There was a time when I made games, or tried as much. Now I make game-related libraries, by the truckload. Commit Streak for Life.

tommyettinger / $_$.java

Created October 11, 2017 03:54

Dollar Eyes Dot Java

	/*
	MIT License

	Copyright (c) 2017 Tommy Ettinger

	Based on lz-string4java, which is:
	Copyright (c) 2016 rufushuang

	Permission is hereby granted, free of charge, to any person obtaining a copy
	of this software and associated documentation files (the "Software"), to deal

tommyettinger / RandomUtils.java

Created July 9, 2017 05:59

Tiny Java utilities for generating high-quality random int values from a large state array

	public class RandomUtils
	{
	/**
	* Generates a state array for use with {@link #randomInt(int[])}; this state array will be random using {@code Math.random()}.
	* @return a 129-element int array with contents randomized by {@code Math.random()}
	*/
	public static int[] initialState()
	{
	final int[] state = new int[129];
	for(int i = 0; i < 129; i++)

tommyettinger / CurvedRandom.java

Created July 4, 2017 00:21

Simple, fast curved-distribution random number generator. For LibGDX applications.

	package change.this;

	import com.badlogic.gdx.utils.NumberUtils;
	public class CurvedRandom
	{
	private long state0, state1;

	/**
	* Gets a roughly 96-bit random seed using Math.random().
	*/

tommyettinger / PRNG.cs

Last active September 29, 2017 04:28

Pseudo-random number generator in C#; compatible with System.Random

	using System;
	/*
	A faster drop-in replacement for System.Random with added features for copying and storing state.
	But why replace System.Random in the first place, you ask?
	A few reasons. One is discussed here, with the apparent consensus that it won't change:
	https://connect.microsoft.com/VisualStudio/feedback/details/634761/system-random-serious-bug
	(The formatting on that page is pretty lousy, so the text is here as well for convenience.)
	"""While investigating the period of various random number generators, I found a serious bug in
	Microsoft .NET System.Random implementation.
	Microsoft Documentation (http://msdn.microsoft.com/en-us/library/system.random.aspx) says that

tommyettinger / pcg.nim

Last active October 3, 2017 05:38 — forked from zacharycarter/rng.nim

	#[ Written by Tommy Ettinger in 2017, based on work by Melissa O'Neill in 2015:
	PCG-Random, http://www.pcg-random.org/

	To the extent possible under law, the author has dedicated all copyright
	and related and neighboring rights to this software to the public domain
	worldwide. This software is distributed without any warranty.

	See <http://creativecommons.org/publicdomain/zero/1.0/>. ]#

	var x*: uint64 # The state can be seeded with any value.

tommyettinger / TiledElevationDistance.java

Last active December 26, 2016 00:13 — forked from zacharycarter/TiledElevationDistance.java

	package com.carterza.planet.map.generator.pathfind;

	import com.badlogic.gdx.ai.pfa.Connection;
	import com.badlogic.gdx.ai.pfa.Heuristic;

	/**
	* Created by zachcarter on 12/20/16.
	*/
	public class TiledElevationDistance<N extends TiledTerrainNode> implements Heuristic<N> {

tommyettinger / FindLowerElevation.java

Last active December 24, 2016 02:14 — forked from zacharycarter/FindLowerElevation.java

	private Coord findLowerElevation(Coord currentLocation, GreasedRegion riverBlockages,
	GreasedRegion heights, GreasedRegion reuse, GreasedRegion temp) {
	heights.refill(heightData.data, Sand, heightData.data[currentLocation.x][currentLocation.y])
	.andNot(riverBlockages);

	reuse.clear().insert(currentLocation);
	temp.remake(reuse).fringe();
	int searchDistance = 40;
	for(int d = 1; d < searchDistance; d++)
	{

tommyettinger / FactionMap.java

Last active December 17, 2016 23:41 — forked from zacharycarter/FactionMap.java

Update hoping to fix

	private void generateFactionMap(final int factionCount, double controlledFraction) {
	MultiSpill spreader = new MultiSpill(new short[WIDTH][HEIGHT], Spill.Measurement.MANHATTAN, CommonRNG.getRng());
	OrderedMap<Coord, Double> entries = new OrderedMap<>();

	char[][] map = new char[WIDTH][HEIGHT];
	short[][] regionMap = new short[WIDTH][HEIGHT];

	for(int x = 0; x < WIDTH; x++) {
	for(int y = 0; y < HEIGHT; y++) {
	if(tiles[x][y].heightValue >= Sand)

tommyettinger / WorldMaps.txt

Created December 11, 2016 09:05

More SpillWorldMap results from SquidLib, now with varying water amounts and wilderness-to-controlled-land ratios

tommyettinger / Halton.java

Created November 25, 2016 23:05

Quick and easy Halton sequence point generator for libGDX


	/**
	* Gets a quasi-random Vector2 between (0f,0f) inclusive and (1f,1f) exclusive, assigning into {@code into} the
	* {@code index}-th point in the (2, 3) Halton sequence. If index is unique, the Vector2 should be as well for all
	* but the largest values of index. You might find an advantage in using values for index that start higher than
	* 20 or so, but you can pass sequential values for index and generally get Vector2s that won't be near each other;
	* this is not true for all parameters to Halton sequences, but it is true for this one.
	* @param into the Vector2 to place the result into and return
	* @param index an int that, if unique, positive, and not too large, will usually result in unique Vector2 values
	* @return into, modified; usually will have a comfortable distance from Vector2s produced with close index values