Posts Tagged ‘Papervision’

For one of the most basic shader examples, we will be learning about the Composite Shader, this basicaly gives your object a solid color with wireframe showing.

Composite Material Example

Composite Material Example

If you are a beginner to PV3D/Flash, My examples will be working from my initial post on Shaders which can be found here.
Otherwise please feel free to continue. 

Firstly we will need to import all necessary classes

package compositeMat {
	import flash.display.Sprite;
	import flash.text.TextField;
	import flash.text.TextFormat;

	import org.papervision3d.cameras.CameraType;
	import org.papervision3d.materials.ColorMaterial;
	import org.papervision3d.materials.WireframeMaterial;
	import org.papervision3d.materials.special.CompositeMaterial;
	import org.papervision3d.materials.utils.MaterialsList;
	import org.papervision3d.objects.primitives.Sphere;
	import org.papervision3d.render.BasicRenderEngine;
	import org.papervision3d.view.BasicView;

        import org.papervision3d.objects.parsers.DAE;
        import org.papervision3d.objects.DisplayObject3D;

Next we will pass the class, and the variables that we will be using

public class compositeMat extends Sprite
		private var view:BasicView;
		private var color:ColorMaterial;
		private var wire:WireframeMaterial;
		private var composite:CompositeMaterial;
		private var sphere:Sphere;

		private var tf:TextField;
		private var format:TextFormat;

		 private var dae:DAE;
                private var daeFile:String;
                private var daeMaterialName:String;

And we will now finish off with our functions

public function compositeMat()
//controls camera size initialises BasicView
view = new BasicView(300, 300, false, false, CameraType.FREE);
//Sets up Rendering Engine
view.renderer = new BasicRenderEngine(); addChild(view);
//Select colours for Wireframe and object
color = new ColorMaterial(0x444444);
wire = new WireframeMaterial(0x888888);
composite = new CompositeMaterial();
//Loading your .dae File
daeFile = "yourdaeFileName.dae";
dae = new DAE();
//adding the composite shader ontop of your DAE model
dae.load(daeFile,  new MaterialsList ( { all:composite } ));
//sometimes object needs to be scaled
dae.scale = 100;

//adding the object to the scene

//Formating and adding text label to the scene.
format = new TextFormat("Arial", 10, 0xFFFFFF);
tf = new TextField(); tf.width = 230; tf.text = "Composite Material Shader";
tf.x = 10; tf.y = 10; tf.setTextFormat(format);
addEventListener(Event.ENTER_FRAME, onRenderViewport);

private function onRenderViewport(e:Event):void
//If you want your object to rotate on its axis
//Finaly render

Now if you are following this example on from my Introductory post on Shaders, you will need to import this .as file into you file by typing in the following:

package {
	import org.papervision3d.render.BasicRenderEngine;
	import org.papervision3d.view.BasicView;

	import compositeMat.compositeMat; //IMPORTANT importing the Shader AS file
	import flash.display.Sprite;

	[SWF (width="800", height="600", framerate="25", backgroundColor="0x333333")];

	public class MainShader extends Sprite {
		private var composite:compositeMat;

		public function MainShader() {
			composite = new compositeMat();

Now that you have imported your file into you file, which is linked to whateveryoucallyourFLA.fla file you can press ctrl + shift + Enter to compile and debug your code or
ctrl + Enter to run your movie.

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This is to be the first of many tutorials on different shaders, and how they can be applied to dae files. Most tutorials you will find online explain how to add shaders to basic papervision objects, but not to DAE (COLLADA) files.

To begin with, we will start to learn about the simpler shaders, such as wireframe and solid colour shaders and work up to more complicated shaders such as envMapMaterial (environment material) shaders and Movie clip shaders.

All tutorials will be explained with the COMPLETE source code to allow you to get it going on your own machine!

Creating the initial project .Fla and .as Global files

These files will help link in all shader files so that you can learn how to add different shaders to more that one dae file, or different shaders to the same dae file.

first off, we will create an empty .FLA file (this will allow us to read the .as file we will make
and will help us run it!)

File > New (ctrl+N)
select Flash File (Actionscript3) and click ok.
Now save that under whatever name you like.

Now we need to create an Actionscript file (.as)
File > new (Ctrl+N)
select Actionscript File and click ok.
Now save this using whatever name you like – I will call it

It is in this file where we will write our code. but first we need to link
it to the .FLA file we made earlier.
click on the tab to open your .FLA file and look near the bottom of your screen, in the
properties tab, for something called Document Class in the text box to the right of it, enter
your .as file name – in this case “Shader” (without the quotes) and click on the little pencil icon to scan for the file.

You will see a pop up message, just click OK to close it. 

In this Tutorial, we now have yourfile.FLA and a file.

The file will be the Main file that will link all the other .as files

To find the Relevant Shader Tutorials, please use the drop down menu from the tabbed links at the top of this page, titled Papervision Tutorials.

This is an example video, of what can be achieved using basic Papervision and Actionscript Code.

All the tutorials on this website will help you to create something like what you see below, if you are not satisfied, or need clarification or help feel free to post a comment, and i will get back to you!
Bare in mind, this video is just an example, and is not complete (i.e some bugs exist, such as inverted textures..)

Papervision 3D Example from Thierry

When creating models/importing models into flash, and testing code in run time etc, sometimes it is very usefull to have Statistics displayed on the runtime page, to see how well your program is running, any memory leaks etc..

This however is very easy to set up in Papervision3D.
First you need to import StatView:
import org.papervision3d.view.stats.StatsView;

If you have employed BasicView for your scene setup, add

private var view:StatsView;

in your class, and then call it using:

addChild(new StatsView(renderer));

Thats it! very simple, you should end up with something looking like this in your window

  • Try and keep your models as simple as possible without loosing much on detail (obviously some sacrifices have to be made).
  • When exporting to a DAE file, try and use a model that is newly made, rather than editing one that is already textured and in a scene with other objects.
  • DO NOT, texture your objects, until you are ready to add your UVW map, this will avoid confusion in the DAE, where max has exported the files, with paths to textures that you no longer use, this will throw errors when testing movie in Actionscript.
  • Having a clean model, with few gemoetries and one UVW map will help reduce complications and errors in the long run – trust me, im speaking from experiance! :)
  • .DAE files, can be opened in Notepad, and edited – do not edit if you are unsure of what to do, you may end up corrupting your file, and having to re-export.
  • Notepad2, is a lot better than Notepad – with syntax highliting and numbered lines, get it here, its free!

If you have any tips you would like to add, please feel free to leave them in the comments! :)

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