Ondřej Žára

About

JavaScript developer, living in Prague, Czech Republic. Currently employed by Seznam.cz.

Interested in my résumé? Try the GitHub version as well.

Games

Name	Description	Technologies	Source
The Conception	My 7DRL 2013 (7-day roguelike contest) game. Contains hexagons. And chlamydia. And much more.	rot.js
The Royal Wedding	Another coffebreak roguelike – with story, lighting, zombies and (sometimes) lutefisk!	rot.js
Star Wars Miniature	My take on the GitHub Game Off 2012 contest.	rot.js
RailRL	Small testbed game: hexes, trains, procedurally generated terrain.	rot.js
Drago	HTML5 remake of an old game by Blue Byte Software. Fully playable with cool graphics, animations, sounds and music!	HAF
CSS Blockout	3D Tetris (Blockout) implemented using CSS 3D transforms. Submitted as a demo to Mozilla Dev Derby. Works correctly only in certain Browser/OS/HW combinations.	CSS 3D
Rubik's cube	Rubik's cube implemented using CSS 3D transforms. Submitted as a demo to Mozilla Dev Derby. Works correctly only in certain Browser/OS/HW combinations.	CSS 3D
Clickmania	JS port of a well-known time-killer.
Just Spaceships!	Space shooter game: canvas, sounds effects, animated sprites, AI, websocket-based multiplayer! A presentation documenting the development process is available for online viewing.	HAF, WebSockets, TeaJS
Atoms	Traditional "atoms" game, well-known from Windows 3.1. Up to four players; local play with bots, multiplayer using WebSockets.	WebSockets, TeaJS
Geometry Wars	Multiplayer-only game, implemented using WebSockets. Score by drawing longest line; block enemies by placing circles.	WebSockets, TeaJS
Brain Defense	Zombies & lasers. What could go wrong? (Non-obsolete browser required.)	HAF
Rogue Zombies	Coffeebreak roguelike game. Warning: they will get you.
js-like	JavaScript roguelike, heavily inspired by ADOM.

Projects

Name	Description	Technologies	Source
promise.js	A tiny browser-based implementation of the "Promises/A+" spec. Passes all tests (using a tiny mocha2jasmine adapter).
JS Style Badge	Create your own JS signature, based on your coding preferences.
rot.js	ROguelike Toolkit, written in JavaScript. Cool dungeon-related stuff, interactive manual, documentation, tests!
HAF	HTML5 Animation Framework is used to orchestrate complex canvas-based rendering projects, such as Brain Defense or Just Spaceships. It can be also used to perform several benchmarks and generally experiment with HTML canvas.
TeaJS	Multi-purpose wrapper around V8 JS engine. Rich set of libraries included, including DB access, POSIX + Web Sockets, Apache module, …	V8, C++
Slides	Yet another HTML/JS presentation system.
WWW SQL Designer	Online tool for designing relational database schemas. Features schema saving, exporting to xml and sql script creation.
Gallery	Personal photogallery.
Cookbook	Written in PHP, uses MySQL database backend. Contains over 250 recipes.
oz.php	Tiny PHP framework for rapid application development.
oz.js	Tiny but smart JS assistance for advanced coders.
SZ Showcase	A selection of photos taken in Sluneční zátoka.
Sluneční zátoka	Photos from traditional children summer camp with long history and unique atmosphere. Years 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, and 2012.
Fire Commander	Traditional two-pane file manager, implemented as Firefox extension / XUL application.
Syntax	Tiny syntax highlighter.

Demos & Experiments

Name	Description	Technologies	Source
Photo Editor	Basic photo adjustments using Web Workers. No server-side necessary. Load, adjust, crop, save, profit :-) Submitted as a demo to Mozilla DevDerby.	Web Workers
Hash Bruteforcer	Computes MD5 and SHA1 hashes using Web Workers. Submitted as a demo to Mozilla DevDerby.	Web Workers
Pure CSS slides	A non-JavaScript experiment: fully featured presentation system, using only HTML + CSS.	No JS
Collaborative Draw	WebSockets used to share drawing area. Support for lines, text and images.	WebSockets, TeaJS
Canvas Audio Fireworks	Regular fireworks mixed with HTML5 Audio API Extension.	Audio API
Harmoniums of Mercury	Semi-interactive homage to Kurt Vonnegut.
Space-filling curves	Recursive implementation of Peano/Hilbert curves, using canvas transformations.
a-g-e	Adventure Game Engine, suitable for playing interactive gamebooks.
Coral generator	Based on certain Game of Life rules; requires Web Workers.	Web Workers
Worms	Canvas-based worm simulation.
Canvas-based e-mail hash	Visualizing e-mail addresses using various algorithms.
Canvas fireworks	JavaScript fireworks using elementary mechanics, <canvas> and <audio> tags.
Compression benchmarks	Trying to compress JSON with algorithms implemented in JS.
Canvas maze	Produces a perfect maze and finds the path between two corners. In perfect maze, every two cells are connected with exactly one path.
Web Worker Fractals	Interactive fractal drawer. Uses <canvas> and Web Workers (processing in multiple threads). Both Julia and Mandelbrot sets are supported. Submitted as a demo to Mozilla DevDerby.	Web Workers
Derivation Captcha	An accessibility experiment.	PHP
HEX	Creates SVG maps for "Expres" game (Dampfross, Railway Rivals).
Sun	Interactive SVG Sun, logo for Sluneční zátoka.
Sudoku solver	I wrote three Sudoku solvers. This one is fastest, featuring some optimizations in addition to brute force.
RSS	AJAX & MySQL RSS reader, public domain.		Download

Talks

Writings

Old stuff