Archive for the 'coding' Category

Canvas2DtoWebGL

Friday, September 26th, 2014

Sometimes working with WebGL I miss having the freedom to use regular Canvas2D calls, the only solution in most cases is to create a secondary Canvas and upload it to the GPU in every frame, something that could be costly when the viewport is very big. For those situations I have created a library that adds most of the Canvas2D functions to a WebGL context, even some that where a little bit tricky to emulate (lineWidth…).

The performance is more or less the same as using the regular Canvas, the quality though is a little bit worse, but it opens the door to combine some of my existing libraries with WebGL capabilities.

Check it out in github

Web experiment: Drone physics

Thursday, September 25th, 2014

For a long time I wanted to try some 3D physics on the web. For that purpose there are two libraries around, Cannon.js which is written in JS from scratch, and Ammo.js which is a port of Bullet made using emscripten. I’ve been playing around with both of them, the performance of cannon could be improved (too much garbage generated in memory) and the interface of ammo is horrible (as all emscripten ports).

Drone

Play around with this demo, the controls are very hard and it is easy to start spinning uncontrollably, but Im pleased with the movement.

#MHD2014

Wednesday, June 18th, 2014

This year for the Music Hack Day I wanted to do some visualization using WebGL. Some of my friends were doing a hack using a Maschine from Native Instruments so I decided to get the Midi messages (using the Web MIDI API) and visualize them somehow. This is the video of the presentation.

You can try the visualization here but without a MIDI keyboard sending events is quite boring.

Conway Stamps Collection

Sunday, June 8th, 2014

The other day I wanted to clean a little bit the code of my Conway Game of Life GPU web app, and meanwhile add some features. While searching for better demo patterns I discovered this great collection with all the known oscillators and their period, it is made by Dean Hickerson. It is cool that changing the number of steps you can verify that the period is right. Some patterns are very interesting, others are just combinations of other patterns.

conway

 

Things I hate about WebGL

Tuesday, May 13th, 2014

Inspired by this post from Rich Geldreich, and after coding in WebGL for more than two years, I want to make a list of all the things I hate about WebGL graphics programming. Which doesnt mean I dont like WebGL, just that there are many fields to improve that should be addressed.

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Coding C++ from the browser

Saturday, April 26th, 2014

Today I wanted to try a very basic web experiment that I had in mind for some time.
The idea was to code in C++ inside the browser and see the output right there.

compiler

Click the image to try it

If you want to know how it is done read the full entry.
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My LD27 entry won the second position in Graphics!

Saturday, September 21st, 2013

I was surprised but my A DEUS minigame made in 48 hours won the second position (from 1400 entries) in the graphics category thanks to the public votations.

Obviously I didnt ranked so well in the rest of the categories but that encouraged me to work harder next time and achieve a better position in other categories as well.

A DEUS: Postmortem of my LudumDare entry

Monday, August 26th, 2013

This weekend (my last holidays weekend) was the Ludumdare 27, the compo where you have to make a game based on a given theme, alone, in 48 hours, without reusing existing code or assets.

I made “A DEUS”, an asynchronous multiplayer web game in Javascript/WebGL. You can try it clicking on the image.

adeus_title

Click in the image to play the game

I wanted to write a post-mortem with some of my thoughts about the game and the development process.

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Playing with the Emscripten port of Box2D

Saturday, July 20th, 2013

Some time ago I had the idea of porting the concept of a great old game called Mindrover to the web, as an excuse to do something with my LiteGraph.js library (a javascript to create modular graphs similar to PD).

Motorclub, using graphs and physics

Mindrover is a game where you design your vehicle to fulfill some challenges. You cannot directly control the vehicle during the challenge, instead you must add sensors and thrusters around the chasis of the vehicle and wire them to react according to your strategy. A very interesting and fun game. Sadly it seems that the mechanics of the game havent caught up with more developers.

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Updating Simplecanvas

Tuesday, July 9th, 2013

I have improved Simplecanvas so now it has some basic 3D rendering functions, check the latest entries in the gallery to see the syntax.

It is a pity that I can’t use WebGL (I want to keep it as compatible as possible, specially for iOS), otherwise I could make something more like processing.

 

simplecanvas