Sunday, October 20, 2013

Halloween Strategy Game

As a fun little side project to kick off the season I decided to write a Halloween themed strategy game (in the style of the tower defense genre). Appropriate for children (there is no gore or violence) although it may be a bit challenging for young ones.

Click Here to play!

As the narrator explains... Monsters appear every Halloween night and take all of your candy. It's up to you to build spooky decorations to scare them off as they get progressively more difficult to frighten.

It was written from scratch in Javascript leveraging HTML Canvas, jQuery, and UnderscroreJS. I took most of the images from google image search. If you own any of them and would either like credit or want them removed, contact me immediately!

Happy Halloween!

Saturday, February 9, 2013

Web Guitar

I finally got around to porting some of my old code to use HTML5's Web Audio API. It's a guitar tab editor that uses web audio to playback your tabs. The sound is synthesized using the code in the textarea below the editor. By default, the code is a basic string pluck synthesis, but you can change it to produce whatever waveforms you'd like.

It's primitive. It hasn't been tested on anything other than chrome. The UI has no documentation. It's got some growing up to do, but it's still fun to play around with.

Here it is: Web Guitar Demo

Load the example "Moonlight sonata" and press play.

Hint: clicking above the strings in the editor will toggle between 4, 8, 16, 1, 2 which is the reciprocal of the duration of the note. Also, after clicking on a string, you can navigate the editor using the arrow keys.

Monday, January 7, 2013

Quantum Algorithms

I've added a few examples to my quantum circuit editor / simulator. The most interesting of which being Grover's Algorithm for unsorted search.

Go ahead and try it out.

Hit "Enter" to evaluate the circuit and get a table of probable outcomes.

The gate F7 makes the fifth qubit in the "|1>" state if the first four qubits are in the state "|0111>" (seven). The circuit is able to determine that "|0111>" is the magic number with over 96% accuracy and only three calls to F7.

I also included an F5 gate. Go ahead and right click those F7 gates away, select the F5 gate, and then drag it into the three places the F7 was. Now it will find "|0101>".

You can save the entire circuit by pressing Ctrl+S. Double click on the GROV, F7, and F5 gates to see what their circuits look like (or to edit them to create your own versions).

Some of the other examples include:

  • Toffoli gate (you can make one simply by dragging to controls onto an X gate, but this is an implementation using only CNots and single-qubit gates)
  • Bell State (the "Hello World" of quantum computing)
  • 2 Qubit QFT and 4 Qubit QFT (again, the editor has it's own quantum fourier transform gate, but these are implementations using only Hadamard gates, controlled rotations, and swaps)
More general info can be found in the help menu on the very top right of the application.