package
{
	import away3d.cameras.Camera3D;
	import away3d.containers.*;
	import away3d.core.base.*;
	import away3d.core.math.*;
	import away3d.events.*;
	import away3d.materials.*;
	import away3d.primitives.*;
	
	import com.bit101.components.Label;
	import com.bit101.components.Panel;
	
	import flash.display.Sprite;
	import flash.display.Stage;
	import flash.display.StageAlign;
	import flash.display.StageScaleMode;
	import flash.events.Event;

	[SWF(width="500", height="400", frameRate="30", backgroundColor="#FFFFFF")]
	public class Camera extends Sprite
	{
		private var View:View3D;
		private var swfStage:Stage;
		private var cover:Cover;
		private var camera:Camera3D;
		private var lastMouseX:Number;
		private var lastMouseY:Number;
		private var camDrawing:Sprite;
		private var camDots:Sprite;
		private var move:Boolean = false;
		private var label:Label;
		private var label2:Label;
		
		public function Camera()
		{
			super();
			// prep for handling resizing events
            swfStage = this.stage;
			swfStage.scaleMode = StageScaleMode.NO_SCALE;
			swfStage.align = StageAlign.TOP;
			
			// create a 3D-viewport
			camera = new Camera3D({zoom:1, focus:200, distance:50});
			View = new View3D({camera:camera,x:250, y:200});
			// add viewport to the stage
			addChild(View);
			camera.lookAt( new Number3D(0, 0, 0) );
			
			// Add something that we can display the camera on
			var pan:Panel = new Panel(this,10,10);
			pan.setSize(100,190);
			pan.color = 0xffffff;
			addChild(pan);
			label = new Label(pan,0,0," As seen from above");
			pan.addChild(label);
			
			camDots = new Sprite()
			camDots.x = 50;
			camDots.y = 80;
			pan.addChild(camDots);
			
			camDrawing = new Sprite()
			camDrawing.x = 0;
			camDrawing.y = 160;
			pan.addChild(camDrawing);
			
			label2 = new Label(pan,0,170,"");
			pan.addChild(label2);
			
			updateCameraDrawing();
			
			// Add some reference spheres
			for(var i:Number = 0; i < 30 ; i++){
				addRandomSphere(1000,5);
			}
			// Add a few that are closer to the centre
			for(var j:Number = 0; j < 10 ; j++){
				addRandomSphere(100,5);
			}
			// Add big red "sun"
			var sphere3:Sphere = new Sphere({radius:500, material:"red#white",x:0,y:0,z:3000,segmentsW:15,segmentsH:9});
			View.scene.addChild(sphere3);
			addCamDot(0xff0000,0,-500,30);
			
			// Add a mask to the camera sprite
			var panMask:Sprite = new Sprite();
			panMask.graphics.beginFill(0xf000f0);
			panMask.graphics.drawRect(0,0,100,190);
			panMask.graphics.endFill();
			pan.addChild(panMask);
			camDrawing.mask = panMask;
			
			// Update the view and display the "cover"
			View.render();
			cover = new Cover(this);
			addChild(cover);
			addEventListener(Event.ENTER_FRAME, onEnterFrame);
		}
		private function addRandomSphere(distance:Number,size:Number):void
		{
			var col:Number = Math.random() * (255*255*255);
			var mat:ColorMaterial = new ColorMaterial( col.toString(16) );
			var maxPos:Number = distance;
			var halfPos:Number = distance/2;
			var xPos:Number = (Math.random()*halfPos)-(halfPos/2);
			var yPos:Number = (Math.random()*halfPos)-(halfPos/2);
			var zPos:Number = (Math.random()*maxPos)-(maxPos/2);
			var sphere3:Sphere = new Sphere({radius:size, material:mat,x:xPos,y:yPos,z:zPos,bothsides:false});
			View.scene.addChild(sphere3);
			addCamDot(col,xPos,zPos,size);
		}
		private function onEnterFrame(e:Event):void
		{
			if(!cover.visible)
			{
				camera.zoom = (stage.mouseY/stage.stageHeight) * 4+0.5;
				camera.focus = (stage.mouseX/stage.stageWidth) * 600;
				updateCameraDrawing();
				// Render viewport
				View.render();
				label2.text = "Zoom: "+(Math.floor(camera.zoom*10)/10)+" Focus: "+Math.floor(camera.focus);
			}
		}
		private function addCamDot(col:Number,x:Number,z:Number,size:Number):void
		{
			camDots.graphics.beginFill(col);
			camDots.graphics.drawCircle(x/11,z/11,size/3)
			camDots.graphics.endFill();
		}
		private function updateCameraDrawing():void
		{
			var maxFOV:Number   = 100; // (width/x)
			var maxZoom:Number  = 70; // (height/y)
			var currFOV:Number  = ( (100/camera.focus) )*maxFOV/2;
			var currZoom:Number = ( ((camera.zoom/4)+0.5) * maxZoom);
			camDrawing.graphics.clear();
			camDrawing.graphics.lineStyle(1,0x000000);
			// Draw lens triangle
			camDrawing.graphics.moveTo(maxFOV/2,0);
			camDrawing.graphics.lineTo((maxFOV/2)-(currFOV/2) , -currZoom);
			camDrawing.graphics.lineTo((maxFOV/2)+(currFOV/2) , -currZoom);
			camDrawing.graphics.lineTo(maxFOV/2 , 0);
			// Draw "camera body"
			camDrawing.graphics.moveTo(maxFOV/2-5,0);
			camDrawing.graphics.lineTo(maxFOV/2+5,0)
			camDrawing.graphics.lineTo(maxFOV/2+5,10)
			camDrawing.graphics.lineTo(maxFOV/2-5,10)
			camDrawing.graphics.lineTo(maxFOV/2-5,0)
			trace("currZoom: "+currZoom+" currFOV: "+currFOV);
		}
	}
}