path: root/assets/canvas-runtime.js

/* <copyright>
This file contains proprietary software owned by Motorola Mobility, Inc.<br/>
No rights, expressed or implied, whatsoever to this software are provided by Motorola Mobility, Inc. hereunder.<br/>
(c) Copyright 2011 Motorola Mobility, Inc.  All Rights Reserved.
</copyright> */



///////////////////////////////////////////////////////////////////////
//Loading webGL/canvas data
function initWebGl (rootElement, directory) {
	var cvsDataMngr, ninjaWebGlData = JSON.parse((document.querySelectorAll(['script[data-ninja-webgl]'])[0].innerHTML.replace('(', '')).replace(')', ''));
	if (ninjaWebGlData && ninjaWebGlData.data) {
		for (var n=0; ninjaWebGlData.data[n]; n++) {
			ninjaWebGlData.data[n] = unescape(ninjaWebGlData.data[n]);
		}
	}
	//Creating data manager
	cvsDataMngr = new CanvasDataManager();
	//Loading data to canvas(es)
	cvsDataMngr.loadGLData(rootElement, ninjaWebGlData.data, directory);
}

///////////////////////////////////////////////////////////////////////
// Class ShapeRuntime
//      Manages runtime shape display
///////////////////////////////////////////////////////////////////////
function CanvasDataManager()
{
	this.loadGLData = function(root,  valueArray,  assetPath )
	{
		if (assetPath)
			this._assetPath = assetPath.slice();

		var value = valueArray;
		var nWorlds = value.length;
		for (var i=0;  i<nWorlds;  i++)
		{
			var importStr = value[i];
			var startIndex = importStr.indexOf( "id: " );
			if (startIndex >= 0)
			{
				var endIndex = importStr.indexOf( "\n", startIndex );
				if (endIndex > 0)
				{
					var id = importStr.substring( startIndex+4, endIndex );
					var canvas = this.findCanvasWithID( id, root );
					if (canvas)
					{
						var rt = new GLRuntime( canvas, importStr,  assetPath );
					}
				}
			}
		}
	}

	this.collectGLData = function( elt,  dataArray )
	{
		if (elt.elementModel && elt.elementModel.shapeModel && elt.elementModel.shapeModel.GLWorld)
		{
			var data = elt.elementModel.shapeModel.GLWorld.export( true );
			dataArray.push( data );
		}

		if (elt.children)
		{
			var nKids = elt.children.length;
			for (var i=0;  i<nKids;  i++)
			{
				var child = elt.children[i];
				this.collectGLData( child, dataArray );
			}
		}
	}

	this.findCanvasWithID = function( id,  elt )
	{
		var cid = elt.getAttribute( "data-RDGE-id" );
		if (cid == id)  return elt;

		if (elt.children)
		{
			var nKids = elt.children.length;
			for (var i=0;  i<nKids;  i++)
			{
				var child = elt.children[i];
				var foundElt = this.findCanvasWithID( id, child );
				if (foundElt)  return foundElt;
			}
		}
	}
}

///////////////////////////////////////////////////////////////////////
// Class GLRuntime
//      Manages runtime fora WebGL canvas
///////////////////////////////////////////////////////////////////////
function GLRuntime( canvas, importStr,  assetPath )
{
    ///////////////////////////////////////////////////////////////////////
    // Instance variables
    ///////////////////////////////////////////////////////////////////////
	this._canvas		= canvas;
	this._context		= null;
	this._importStr		= importStr;

	this.renderer		= null;
	this.myScene		= null;
	this.light			= null;
	this.light2			= null;
	this._rootNode		= null;

	this._firstRender	= true;
	this._initialized	= false;

	this._useWebGL		= false;

	// view parameters
	this._fov = 45.0;
	this._zNear = 0.1;
	this._zFar = 100.0;
	this._viewDist = 5.0;

	this.elapsed = 0;

	this._aspect = canvas.width/canvas.height;

	this._geomRoot = null;

	// all "live" materials
	this._materials = [];

		// provide the mapping for the asset directory
		if (assetPath)
		{
			this._assetPath = assetPath.slice();
			if (this._assetPath[this._assetPath.length-1] != '/')
				this._assetPath += '/';
		}

    ///////////////////////////////////////////////////////////////////////
	// accessors
    ///////////////////////////////////////////////////////////////////////
	this.getZNear			= function()		{  return this._zNear;			}
	this.getZFar			= function()		{  return this._zFar;			}
	this.getFOV				= function()		{  return this._fov;			}
	this.getAspect			= function()		{  return this._aspect;			}
	this.getViewDistance	= function()		{  return this._viewDist;		}

	this.get2DContext		= function()		{  return this._context;		}

	this.getViewportWidth	= function()		{  return this._canvas.width;	}
	this.getViewportHeight	= function()		{  return this._canvas.height;	}

    ///////////////////////////////////////////////////////////////////////
	// accessors
    ///////////////////////////////////////////////////////////////////////
	this.loadScene = function()
	{
		// parse the data
		// the GL runtime must start with a "sceneData: "
		var index = importStr.indexOf( "scenedata: " );
		if (index >= 0)
		{
			this._useWebGL = true;

			var rdgeStr = importStr.substr( index+11 );
			var endIndex = rdgeStr.indexOf( "endscene\n" );
			if (endIndex < 0)  throw new Error( "ill-formed WebGL data" );
			var len = endIndex - index + 11;
			rdgeStr = rdgeStr.substr( 0, endIndex );

			this.myScene.importJSON( rdgeStr );
			this.importObjects( importStr );
			this.linkMaterials( this._geomRoot );
			this.initMaterials();
			this.linkLights();
		}
		else
		{
			this._context = this._canvas.getContext( "2d" );
			this.importObjects( importStr );
			this.render();
		}
	}

	this.init = function()
    { 
		var ctx1 = g_Engine.ctxMan.handleToObject(this._canvas.rdgeCtxHandle),
			ctx2 = g_Engine.getContext();
		if (ctx1 != ctx2)  console.log( "***** different contexts *****" );
		this.renderer = ctx1.renderer;
      
		// create a camera, set its perspective, and then point it at the origin
		var cam = new camera();
		this._camera = cam;
		cam.setPerspective(this.getFOV(), this.getAspect(), this.getZNear(), this.getZFar());
		cam.setLookAt([0, 0, this.getViewDistance()], [0, 0, 0], vec3.up());
        
		// make this camera the active camera
		this.renderer.cameraManager().setActiveCamera(cam);

		// change clear color
		this.renderer.setClearColor([1.0, 1.0, 1.0, 0.0]);
        
		// create an empty scene graph
		this.myScene = new SceneGraph();

		// load the scene graph data
		this.loadScene();
        
		// Add the scene to the engine - necessary if you want the engine to draw for you
		var name = "myScene" + this._canvas.getAttribute( "data-RDGE-id" ); 
		g_Engine.AddScene(name, this.myScene);

		this._initialized = true;
	}
    
	// main code for handling user interaction and updating the scene   
	this.update = function(dt)
    {
		if (this._initialized)
		{
			if (!dt)  dt = 0.2;
        
			dt = 0.01;	// use our own internal throttle
			this.elapsed += dt;
        
			// changed the global position uniform of light 0, another way to change behavior of a light
			rdgeGlobalParameters.u_light0Pos.set( [5*Math.cos(this.elapsed), 5*Math.sin(this.elapsed), 20]);
        
			// orbit the light nodes around the boxes
			if (this.light )  this.light.setPosition([1.2*Math.cos(this.elapsed*2.0), 1.2*Math.sin(this.elapsed*2.0), 1.2*Math.cos(this.elapsed*2.0)]);
			if (this.light2)  this.light2.setPosition([-1.2*Math.cos(this.elapsed*2.0), 1.2*Math.sin(this.elapsed*2.0), -1.2*Math.cos(this.elapsed)]);

			this.updateMaterials();

			// now update all the nodes in the scene
			this.myScene.update(dt);
		}
    }

	this.updateMaterials = function()
	{
		var nMats = this._materials.length;
		for (var i=0;  i<nMats;  i++)
		{
			var mat = this._materials[i];
			mat.update();
		}
	}

    // defining the draw function to control how the scene is rendered      
	this.draw = function()
    {
		if (this._initialized)
		{
			g_Engine.setContext( this._canvas.rdge