With actionscript you are able to customize these menus and add a little extra interactivity to your pages. Even though most people don’t right click on anything, some people do. To have something there for them to find and use could prove to be useful. It could be anything… credits, navigation, easter eggs, helpers, etc.

Context menus take very little time and effort to add, and show that you are paying a little bit extra attention to detail when creating a site / application.

here is a quick and easy guide to using AS3 Context Menus > http://www.emanueleferonato.com/2009/03/11/understanding-as3-context-menus/

thanks, marc

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PaperFace is a graphical user interface for Papervision 3D. The goal of the app is to build out 3d scenes without the need to write all the initial code. I am hoping to build it to a state where designers can come in and build a fairly complete scene and export the code to someone that can do something with it. Please go register and tell me what you think. Check out the forum on the site, and post any feedback you may have.

The app is no-where near completion, but I thought it would be good to get some thoughts on it throughout the course of development. Plus, now that it is live it puts a little bit of extra pressure on me to work more on it.

the address is www.paper-face.com

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• Introduction
• Parsers: ASE
• Parsers: Collada
• Parsers: DAE
• Parsers: Max3ds
• Parsers: Sketchup
• Parsers: Other
• Parser Comparison
• Final Thoughts
• Tutorial Files

Introduction

Overview

With all the different 3d applications in use today it is hard to come up with one standardized format. So Papervision includes a number of parsers that can interpret some of the different types of 3d files. This gives developers and modelers some freedom as to which application they would like to use.

Located within each parser class in Papervision is a little bit of a write-up that explains what the parser can do and what it can’t. In this tutorial, I will just introduce you to each type; basically re-iterating what is in the class (for ease of access). Then I will run through some examples for how to use a couple of the parsers to load your objects.

What does a Parser do?

As stated above, a parser just interprets whatever is in the 3d asset file and translates it into something that Papervision can read.

Every file format has a core structure that remains the same, so the developers of Papervision have just made an translators for all of these core structures.

Where are the Parsers?

The parsers are located in the Papervision codebase under: src/org/papervision3d/objects/parsers.

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Table of Contents

• Introduction
• Starting Out
• Building your First Papervision Application
• Add Interactivity
• Next Steps
• Tutorial Files

Overview

I am going to start out with a brief discussion and introduction of 3D and what Papervision brings to the table and then move on to the full tutorial. The files for the tutorial can be found by clicking here: tutorial files

What is 3D?

A standard website is created in 2D space; that is it consists of objects (text, images, video, etc) on an X and Y plane. People have faked perspective in the past using graphics tool, but in general it has been 2D. What 3D does is add another dimension to that traditional plane. Alongside the X and Y, there is now a Z. This 3rd dimension allows for depth to be shown.

I remember my entry exam for college, I had to look at a series of shapes and come up with any number of ideas for what it could be. For instance, if you look at a circle with another circle inside it you would think that it was just two circles. If you were told to imagine those same two circles in 3D space the possibilities are much greater as to what they are. It could be a bowling pin from the top, an empty glass, a garbage can, or a football being tossed into the center of a hoop.

If you are having still having trouble envisioning the 3rd dimension, here is a great video/project by Rob Bryanton explaining how dimensions work:

What is Papervision?

Papervision is a 3D engine built with Actionscript that enables developers to start working in 3D. Using a ton of math, the Papervision team has found a way to create a simulated 3D environment.

Papervision consists of a ton of Actionscript classfiles that developers can use to create objects, scenes, and even worlds in 3D space. 3D applications and engines generally build objects using smaller objects, Papervision is no different. It uses triangles as the building blocks for larger objects in the scene. The more triangles that are used, the better the quality but more triangles means that it is harder on the processor.

Being open-source, developers are able to see all the code that they are working with which allows for a better understanding of what they are using. This also means that the development community has to ability to build on what the original developers have done without having to go through the hardships involved in extending something that is not open-sourced.

Open source means that it can be easier to understand how a complex system works because you can view all of the code that it was built with. If you have any more questions regarding the benefits of an open-source system, there is a good article located here: http://www.directionsmag.com/article.php?article_id=889&trv=1

Why use Papervision?

Papervision is a great 3D engine for Flash, but there are others. These include Sandy, Away3D, Alternative, and more. When push comes to shove it is more of a personal preference that I came to like working with Papervision.

I think that the biggest reason to use Papervision (other than comfort from it being the first engine that I tried) is that it is so widely supported in the Flash community. I seem to be able to find more help with Papervision than with any of the other application. Having the ability to tap into the minds of other developers in forums, at conferences, and anywhere really is a priceless tool.

What has been done with Papervision?

I have to start off with a site that I had a hand in building, and that is www.amg-360.com. Apart from a couple of prototypes, this was my first major 3D application for the web.

Some other good examples can be found at: http://dailypv3d.wordpress.com

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Last night (and a little over lunch today) I threw a couple quick experiments together to see what it would look like, and I think that I might try this out with the video when I got home tonight.

The first example comes in the form of a basic color picker that lets you select the color of a pixel from within the image (on the top left). Once you have selected a color, use the slider on the right to control the threshold.

The second example is very similar to the first, it just uses a different sampling method for the color that it is going to use with the threshold. To try this tool, draw a box (from top left to bottom right) over the region of the image where you would like to get your sampling from.

This was a very quick and dirty experiment to see what I could get out of a bitmap with some basic functions, so please forgive my source. I will post more once I get it cleaned up tonight and start trying to work it into my motion detection application.

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You may have seen the video of head tracking using the Nintendo Wii. That video inspired me to try my hand at the same concept using Flash, Papervision 3d, and my newly discovered love for trying to get motion tracking / facial recognition into Flash.

As such, I have created this example which is my first step in creating some sort of tracking interaction with a 3d scene. if you would care to see a little bit more detail about what is going on, hit X to see the video and W to see the framerate. Stay tuned for more updates as I update the tracking code. Once again, I will post the source when it is a little further along.

** please note that you require a webcam to take advantage of the motion tracking, if you do not have a camera the scene’s camera is simply controlled by the mouse.

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I have a couple of uses planned for this and will post them when they are done but here is the first iteration.

With the help of a diff equation from Forrest Briggs, I managed to capture the specific area of movement within the webcam frame. I will continue working and post source once it is complete. This little project is helping me understand the workings of the bitmap data objects in as3.

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He then moved on to talk about Flex Builder 3 and it’s capabilities, one thing that I didn’t know about was the Flex Component Kit for Flash CS3. It is a toolkit that lets you create content in the Flash CS3 IDE and use it in Flex as a Flex component. I am not very well versed in Flex but I was definitely curious about the options that I had as a Flash IDE user.

Now they are showing us a demonstration of the features of Kuler and all of its strengths. This part of the presentation seems to not fit in very well with the flow of all the presentation content. The only real tie-in is that they are showing an Air app.

Flash Diesel is up ! They are starting off with the showing the new object based animation engine that does not use a timeline. It is the same thing that was shown at MAX and Flash on the Beach last year (http://www.youtube.com/watch?v=8_wRMswNLiU), but impressive just the same. They just unveiled a new track-view feature which allows for much greater/easier control of animations.

Up next is the IK part of the demo where they are using a bones tool to add bone structure to movieclips. This is something that I haven’t seen before, they have a quick option to enable bone manipulation at runtime…. very slick.

The ability to manipulate items on the stage in a 3D style has been added to the Flash IDE. There are going to be new controls and capabilities to work with items in a 3D style, the new controls are able to manipulate images and apply things such as tweens to them.

They are now onto Hydra (AIF Toolkit) which is an image processing language, if you would like more information you can check out the info at the Adobe Labs AIF Toolkit site, it can give you much more information that I can. One new things that they are talking about right now is the ability to work with files in the browser without having to send anything through the server. They have added the ability to take something at runtime and save it to your system without having to do a round trip to the server.

Well, that is all for the keynote. I was hoping to see something about Thermo but I didn’t catch anything about it. I did show up 10 minutes late and may have missed it.

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You can see Colin’s notes from his presentation at the following address:
http://moock.org/lectures/newInECMAScript4/

Here is a summary of what he covered in his talk, this is all covered in the link above but I thought that I would just post the items that interested me the most:

Structure Types
- record type
easier way to create custom object types, instead of using classes
- array type
ability to apply types to elements within arrays
- union types
gives the option of assigning one of several datatypes to a variable
ie: var x:(int|string) // x must be either an int or a string

Type changes:
It looks like byte, uint, int are being removed from ECMAScript but they will most likely stay in AS for the time being.
There are a series of new lower case types including string, number, and boolean
There are going to be non-nullable types that cannot be assigned the value of null, the idea is to save time in type catching.

Lexical block scoping lets you create variables without var, it allows you to create assign values to variables within code blocks. Check the lecture for an example, it looks like it would be useful if you have a temporary variable.

You will have the power to create single line functions in the same way that you can currently create a single like conditional statement.

!!= can be used to shorten variable assignment, can turn myVar = myVar || “default” to myVar !!= “default”

Type casting can be done using the operator “cast” ie: food cast Apple

Switch type can be used to test the type of variable in a switch statement to allow for multiple types and custom functionality for each

String indexing looks like it may be a little useful, you can access characters in a string the same way that you would access items in an array “test”[2] would produce “s”. Similarly you can use slice on a string to get a range of characters quickly.

Thats all for now.

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I am forever in debt to the authors of such books and forever in awe of the knowledge that certain people have. This book showed me just how much I am behind the world of Actionscript and how much I have to learn.

I can only hope that with what I know now about coding and what I am learning over the next little while I can really learn to harness the power of Flash and start creating things that are exciting. This book has given me a very strong AS3 foundation to work from and I hope to be able to work on as many AS3 projects as possible so that I don’t lose any of what I have learned from reading through it.

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