dae.as

ActionScript写的3D图片展示功能

package org.papervision3d.objects.parsers
{
	import flash.events.Event;
	import flash.events.ProgressEvent;
	import flash.utils.ByteArray;
	import flash.utils.Dictionary;
	
	import org.ascollada.ASCollada;
	import org.ascollada.core.*;
	import org.ascollada.fx.*;
	import org.ascollada.io.DaeReader;
	import org.ascollada.namespaces.*;
	import org.ascollada.types.*;
	import org.papervision3d.core.animation.*;
	import org.papervision3d.core.animation.channel.*;
	import org.papervision3d.core.geom.*;
	import org.papervision3d.core.geom.renderables.*;
	import org.papervision3d.core.material.AbstractLightShadeMaterial;
	import org.papervision3d.core.math.*;
	import org.papervision3d.core.proto.*;
	import org.papervision3d.events.FileLoadEvent;
	import org.papervision3d.materials.*;
	import org.papervision3d.materials.shaders.ShadedMaterial;
	import org.papervision3d.materials.special.*;
	import org.papervision3d.materials.utils.*;
	import org.papervision3d.objects.DisplayObject3D;
	import org.papervision3d.objects.special.Joint3D;
	import org.papervision3d.objects.special.Skin3D;
	
	/**
	 * @author Tim Knip
	 */ 
	public class DAE extends DisplayObject3D implements IAnimationDataProvider
	{
		use namespace collada;
		
		/** Default line color for splines. */
		public static var DEFAULT_LINE_COLOR:uint = 0xffff00;
		
		/** Default line width for splines */
		public static var DEFAULT_LINE_WIDTH:Number = 0;
		
		/** */
		public var COLLADA:XML;
	
		/** */
		public var filename:String;
		
		/** */
		public var fileTitle:String;
		
		/** */
		public var baseUrl:String;
		
		/** Path where the textures should be loaded from. */
		public var texturePath:String;
		
		/** */
		public var parser:DaeReader;
		
		/** */
		public var document:DaeDocument;
		
		/**
		 * Constructor.
		 */ 
		public function DAE()
		{
			super();
		}
		
		/**
		 * Gets the default FPS.
		 */ 
		public function get fps():uint
		{
			return 20;
		}
		
		/**
		 * Gets a animation channel by its name.
		 * 
		 * @param	name
		 * 
		 * @return the found channel.
		 */ 
		public function getAnimationChannelByName(name:String):AbstractChannel3D
		{
			return null;	
		}
		
		/**
		 * Gets all animation channels for a target. 
		 * <p>NOTE: when target is null, all channels for this object are returned.</p>
		 * 
		 * @param	target	The target to get the channels for.
		 * 
		 * @return	Array of AnimationChannel3D.
		 */ 
		public function getAnimationChannels(target:DisplayObject3D=null):Array
		{
			var channels:Array = new Array();
			if(target == null)
			{
				for each(var array:Array in _channelsByTarget)
					channels = channels.concat(array);
			}
			else if(_channelsByTarget[target])
			{
				channels = channels.concat(_channelsByTarget[target]);
			}
			else
				return null;
					
			return channels;
		}
		
		/**
		 * Gets animation channels by clip name.
		 * 
		 * @param	name	The clip name
		 * 
		 * @return	Array of AnimationChannel3D.
		 */ 
		public function getAnimationChannelsByClip(name:String):Array
		{
			return null;	
		}
		
		/**
		 * Loads the COLLADA.
		 * 
		 * @param	asset The url, an XML object or a ByteArray specifying the COLLADA file.
		 * @param	materials	An optional materialsList.
		 */ 
		public function load(asset:*, materials:MaterialsList = null):void
		{
			this.materials = materials || new MaterialsList();
			
			buildFileInfo(asset);
			
			this.parser = new DaeReader();
			this.parser.addEventListener(Event.COMPLETE, onParseComplete);
			this.parser.addEventListener(ProgressEvent.PROGRESS, onParseProgress);
			
			if(asset is XML)
			{
				this.COLLADA = asset as XML;
				this.parser.loadDocument(asset);
			}
			else if(asset is ByteArray)
			{
				this.COLLADA = new XML(ByteArray(asset));
				this.parser.loadDocument(asset);
			}
			else if(asset is String)
			{
				this.filename = String(asset);
				this.parser.read(this.filename);
			}
			else
			{
				throw new Error("load : unknown asset type!");
			}
		}
		
		/**
		 * Removes a child.
		 * 
		 * @param	child	The child to remove
		 * 
		 * @return	The removed child
		 */ 
		override public function removeChild(child:DisplayObject3D):DisplayObject3D
		{
			var object:DisplayObject3D = getChildByName(child.name, true);
			
			if(object)
			{
				var parent:DisplayObject3D = DisplayObject3D(object.parent);
				if(parent)
				{
					var removed:DisplayObject3D = parent.removeChild(object);
					if(removed)
						return removed;
				}
			}
			return null;	
		}
		
		/**
		 * Replaces a material by its name.
		 * 
		 * @param	material
		 * @param	name
		 * @return
		 */
		public function replaceMaterialByName(material:MaterialObject3D, name:String):void
		{
			if(!this.materials)
				return;
			
			var existingMaterial:MaterialObject3D = this.materials.getMaterialByName(name);
			if(!existingMaterial)
				return;
				
			if(this.material === existingMaterial)
				this.material = material;
			existingMaterial = this.materials.removeMaterial(existingMaterial);
			existingMaterial.unregisterObject(this);
				
			material = this.materials.addMaterial(material, name);
				
			updateMaterials(this, existingMaterial, material);
		}
		
		/**
		 * Replaces materials by its name.
		 * 
		 * @param	materials
		 */
		public function replaceMaterials(materials:MaterialsList):void
		{
			
		}
		
		/**
		 * Sets the material for a child DisplayObject3D.
		 * 
		 * @param child		A child DisplayObject3D of this DAE.
		 * @param material	The new material for the child.
		 */
		public function setChildMaterial(child:DisplayObject3D, material:MaterialObject3D ):void 
		{	
			if(!child) 
				return;	
			child.material = material;
			if(child.geometry && child.geometry.faces)
			{
				for each( var triangle:Triangle3D in child.geometry.faces )
					triangle.material = material;
			}
		}
		
		/**
		 * Sets the material for a child DisplayObject3D by the child's name.
		 * 
		 * @param childName The name of the DisplayObject3D.
		 * @param material	The new material for the child.
		 */
		public function setChildMaterialByName(childName:String, material:MaterialObject3D):void 
		{
			setChildMaterial(getChildByName(childName, true), material);
		}
		
		/**
		 * Builds a animation channel for an object.
		 * 
		 * @param	matrixStackChannel	the target object's channel
		 * @param	target	The target object
		 * @param	channel	The DaeChannel
		 */ 
		private function buildAnimationChannel(target:DisplayObject3D, channel:DaeChannel):MatrixChannel3D
		{
			//if(channel.syntax.isArrayAccess)
			//	return;
				
			var node:DaeNode = _objectToNode[target];
					
			if(!node)
				throw new Error("Couldn't find the targeted object!");
					
			var matrixChannel:MatrixChannel3D = new MatrixChannel3D(this, target, channel.syntax.targetSID);
			
			var transform:DaeTransform = node.findMatrixBySID(channel.syntax.targetSID);
					
			if(!transform)
				throw new Error("Couldn't find the targeted object's transform!");
			
			var matrix:Matrix3D;
			var matrixProp:String;
			var arrayMember:String;
			var data:Array;
			var i:int;
						
			if(channel.syntax.isArrayAccess)
			{
				arrayMember = channel.syntax.arrayMember.join("");
				
				switch(arrayMember)
				{
					case "(0)(0)":
						matrixProp = "n11";
						break;
					case "(1)(0)":
						matrixProp = "n12";
						break;
					case "(2)(0)":
						matrixProp = "n13";
						break;
					case "(3)(0)":
						matrixProp = "n14";
						break;
					case "(0)(1)":
						matrixProp = "n21";
						break;
					case "(1)(1)":
						matrixProp = "n22";
						break;
					case "(2)(1)":
						matrixProp = "n23";
						break;
					case "(3)(1)":
						matrixProp = "n24";
						break;
					case "(0)(2)":
						matrixProp = "n31";
						break;
					case "(1)(2)":
						matrixProp = "n32";
						break;
					case "(2)(2)":
						matrixProp = "n33";
						break;
					case "(3)(2)":
						matrixProp = "n34";
						break;
					default:
						throw new Error(arrayMember);
				}
			}
					
			switch(transform.type)
			{
				case "matrix":
					if(channel.syntax.isFullAccess)
					{
						for(i = 0; i < channel.input.length; i++)
						{
							data = channel.output[i];
							matrix = new Matrix3D(data);
							matrixChannel.addKeyFrame(new AnimationKeyFrame3D("keyframe_" + i, channel.input[i], [matrix]));
						}
					}
					else if(channel.syntax.isArrayAccess)
					{
						matrix = Matrix3D.clone(target.transform);
						
						for(i = 0; i < channel.input.length; i++)
						{
							matrix[matrixProp] = channel.output[i];
							matrixChannel.addKeyFrame(new AnimationKeyFrame3D("keyframe_" + i, channel.input[i], [matrix]));
						}
					}
					else
					{
						throw new Error("Don't know how to handle this channel: " + channel.syntax);
					}
					break;
				case "rotate":
					if(channel.syntax.isFullAccess)
					{
						for(i = 0; i < channel.input.length; i++)
						{
							data = channel.output[i];
							matrix = Matrix3D.rotationMatrix(data[0], data[1], data[2], data[3] * (Math.PI/180));
							matrixChannel.addKeyFrame(new AnimationKeyFrame3D("keyframe_" + i, channel.input[i], [matrix]));
						}
					}
					else if(channel.syntax.isDotAccess)
					{
						switch(channel.syntax.member)
						{
							case "ANGLE":
								for(i = 0; i < channel.input.length; i++)
								{
									var angle:Number = channel.output[i] * (Math.PI/180);
									matrix = Matrix3D.rotationMatrix(transform.values[0], transform.values[1], transform.values[2], angle);
									matrixChannel.addKeyFrame(new AnimationKeyFrame3D("keyframe_" + i, channel.input[i], [matrix]));
								}
								break;
							default:
								throw new Error("Don't know how to handle this channel: " + channel.syntax);
						}
					}
					else
					{
						throw new Error("Don't know how to handle this channel: " + channel.syntax);
					}	
					break;
				case "scale":
					if(channel.syntax.isFullAccess)
					{
						for(i = 0; i < channel.input.length; i++)
						{
							data = channel.output[i];
							matrix = Matrix3D.scaleMatrix(data[0], data[1], data[2]);
							matrixChannel.addKeyFrame(new AnimationKeyFrame3D("keyframe_" + i, channel.input[i], [matrix]));
						}
					}
					else
					{
						throw new Error("Don't know how to handle this channel: " + channel.syntax);
					}
					break;
				case "translate":
					if(channel.syntax.isFullAccess)
					{
						for(i = 0; i < channel.input.length; i++)
						{
							data = channel.output[i];
							matrix = Matrix3D.translationMatrix(data[0], data[1], data[2]);
							matrixChannel.addKeyFrame(new AnimationKeyFrame3D("keyframe_" + i, channel.input[i], [matrix]));
						}
					}	
					else
					{
						throw new Error("Don't know how to handle this channel: " + channel.syntax);
					}		
					break;
				default:
					throw new Error("Unknown transform type!");	
			}
			
			return matrixChannel;
		}
		
		/**
		 * Build all animation channels.
		 */ 
		private function buildAnimationChannels():void
		{
			var target:DisplayObject3D;
			var channel:DaeChannel;
			var channelsByObject:Dictionary = new Dictionary(true);
			var i:int;
			
			_channelsByTarget = new Dictionary(true);
			
			for each(var animation:DaeAnimation in this.document.animations)
			{
				for(i = 0; i < animation.channels.length; i++)
				{
					channel = animation.channels[i];
					
					target = _colladaIDToObject[channel.syntax.targetID];
					if(!target)
						throw new Error("damn");
						
					if(!channelsByObject[target])
						channelsByObject[target] = new Array();
					
					channelsByObject[target].push(channel);
				}
			}
			
			for(var object:* in channelsByObject)