DigiTidal Waves

long time i didn't play with my little psykopaint

Observer pattern? Notifications? listener? event? WTF?

I was using a class to broadcast events to any object without referencing them anywhere.
Making a new project on a new machine, i just thought i could grab the equivalent on the great word wide web.
So i Googled 'Observer pattern AS3', 'event broadcaster', 'notification'...

I found there are lots of misunderstanding between what an observer, a listener, an event are...
Some says that the listeners in flash are direct implementation of observer pattern.
But What i wanted was a centralised way to communicate between object. Instead of object directly referencing each others, they just listen to something without knowing where it comes from. This is highly interesting when you want to trigger events that changes lots of thing in your app without having dependencies!


I remember in pureMVC you could register a class Observer and send a notification. And any object in the framework can listen to it without knowing the object which sent it.
This was great exept i think the implementation is tied to the framework, therefore cannot be used standalone.

So i thought (for the 2 people who might read this blog) that i would share my lightweight implementation which i think is simpler and handier:

How it works:
C wants to know when someone say 'something'
C ask B to tell him when someone say 'something'
A say 'something'
B recieve 'something'
B warns C that someone said 'something'
C is happy

A and C doesn't know each others. They lived happily ever after... in their respective corners.

translation in actionscript:
in the class A:
EventBroadcaster.register(this,EventBroadcastsType.BROADCAST_SOMEONE_SAY_SOMETHING,doSomething);

in the class C:
EventBroadcaster.broadcastEvent(EventBroadcastsType.BROADCAST_SOMEONE_SAY_SOMETHING);

and that's it! Then the class A will call the function doSomething()

you can add parameters as well, if you wish:
ex: A.doSomething(eatYourGreen:Boolean,theAgeOfTheCaptain:int)
and in C:
EventBroadcaster.broadcastEvent(EventBroadcastsType.BROADCAST_SOMEONE_SAY_SOMETHING,true,71);

and A will call doSomething with the parameters.
This is just dead simple class , but dead useful.

Download the class here

REmix

Just had a great new idea! Don't want to tell much more for now but here is the result!

First results subdivisions + psykopaint

this on is with manual angles:



















this on is with random angles:




















I think it produces interesting results! With a good workflow and experiments in different directions it could really be interesting. This is what cubists have been trying to do with painting, here done in only a few moments!

Subdivisions results

Here are different examples with different angle values:

Polygon subdivision!

i am quite exited about this one. It looks rather dull for now maybe, but once it will be integrated into psykopaint it will do some crazy shit!!

It was quite tricky to obtain actually.
I wanted to subdivide polygons with a point and an angle. First i thought of voronoi and complex algorythm, but too complex for my little head.
So i went for the simplicity of oop and created a class Polygon in which i would have a method which will return 2 polygons with the point and angle.

- First get the 2 intersection points between the polygons segments and the line that extend the point and the angle.

- Then Compose 2 polygons whose segments are the ones of the parent polygon until it finds the intersection segment and then bypass the previous segments.

Not sure if it is clear, but here is the result:

CLICK inside the red rectangle several time.
It gets very pretty after a moment

Psykopaint update

been very busy with lots of different stuffs recently.
But now i am back into psykopaint!

Added new functionality called quantification and unlimited output size!
here is a little example which illustrate those 2.
Not online yet, i need to finish lots of other stuffs first and optimise/debug before.

Click to see the fullsize image: