Blog du metabaron

COLLADA / DAE and augmented reality

I wrote, since more than two months now, an augmented reality demo where I show that it's possible to display a DAE object (also know as COLLADA, see wikipedia) within your application.

Doing it is really easy, around 20 lines of code including comments. In 20 lines, you should be able to load the COLLADA object and to load COLLADA materials (meaning textures).

Here are the steps for you to be able to look at the demo:

1. Print Marker PDFthe maker (same marker as for all my other examples)
2. Download the Augmented reality displaying COLLADA applet
3. That's it

So, I'm now able to display any kind of 3D object and to interact with it (as behind what you see on screen are lines of code).

Recently, Mozilla foundation released a new version of Mozilla Weave server (version 1.0). You can download the latest version on this website and read the ...documentation... on the dedicated wiki.

I have to say that, using the full version, I spent almost 3 days on trying to update my previous installation and have something I can use.

So I decided, again, to share with you my configuration files so that people can install their personal weave server.

Virtualhost configuration file:

<VirtualHost *>
	ServerAdmin webmaster@metabaron.net

	Alias /1.0 /var/www/mozilla/server/sync/1.0/index.php
	Alias /user/1 /var/www/mozilla/server/user/1/index.php
        Alias /misc/1/captcha_html /var/www/mozilla/server/misc/1/captcha.php
	
	ServerName mozilla.metabaron.net
	DocumentRoot /var/www/mozilla/server/

	<Directory /var/www/mozilla/server/>
	Options Indexes FollowSymLinks
	AllowOverride none
        Order allow,deny
        Allow from all
	</Directory>

	ErrorLog /var/log/apache2/mozilla.metabaron.net-error.log

	# Possible values include: debug, info, notice, warn, error, crit,
	# alert, emerg.
	LogLevel warn

	CustomLog /var/log/apache2/mozilla.metabaron.net-access.log combined
	ServerSignature On
</VirtualHost>

weave_user_constants.php file: Change

if (!defined('WEAVE_REGISTER_STORAGE_LOCATION')) { define('WEAVE_REGISTER_STORAGE_LOCATION', 'null'); }

to

if (!defined('WEAVE_REGISTER_STORAGE_LOCATION')) { define('WEAVE_REGISTER_STORAGE_LOCATION', 'XXX.metabaron.net'); }

Important: If you are using, as I'm using, a HTTP server and not a HTTPS, find all references to https and change them for http If you don't want to use Captcha when registering a new user, change

if (!defined('WEAVE_REGISTER_USE_CAPTCHA')) { define('WEAVE_REGISTER_USE_CAPTCHA', 0); }

to

if (!defined('WEAVE_REGISTER_USE_CAPTCHA')) { define('WEAVE_REGISTER_USE_CAPTCHA', 1); }

Of course, you'll have to change the databases tables for the new one (read the wiki documentation).

If you already have a user, you'll only have to select Start over from the preferences and point to your custom server, your user will be recreated on the weave server and your data uploaded on the new weave installation.

I hope this will help some of you.