21 files changed, 623 insertions, 331 deletions

diff --git a/assets/canvas-runtime.js b/assets/canvas-runtime.js
index ce2a15de..104c22cc 100644
--- a/assets/canvas-runtime.js
+++ b/assets/canvas-runtime.js
@@ -116,7 +116,8 @@ NinjaCvsRt.GLRuntime = function ( canvas, jObj,  assetPath )
 
         this._aspect = canvas.width/canvas.height;
 
-        this._geomRoot = null;
+        //this._geomRoot = null;
+        this._rootChildren = [];
 
         // all "live" materials
         this._materials = [];
@@ -152,26 +153,36 @@ NinjaCvsRt.GLRuntime = function ( canvas, jObj,  assetPath )
         this.loadScene = function()
         {
                 var jObj = this._jObj;
-                if (!jObj.children || (jObj.children.length != 1))
+                if (!jObj.children)     // || (jObj.children.length != 1))
                         throw new Error( "ill-formed JSON for runtime load: " + jObj );
-                var root = jObj.children[0];
+                var nChildren = jObj.children.length;
 
                 // parse the data
+                var child;
                 if (jObj.scenedata)
                 {
                         this._useWebGL = true;
 
                         var rdgeStr = jObj.scenedata;
                         this.myScene.importJSON( rdgeStr );
-                        this.importObjects( root );
-                        this.linkMaterials( this._geomRoot );
+                        for (var i=0;  i<nChildren;  i++)
+                        {
+                                child = jObj.children[i];
+                                this.importObjects( child );
+                        }
+                        //this.linkMaterials( this._geomRoot );
+                        this.linkMaterials( this._rootChildren );
                         this.initMaterials();
                         this.linkLights();
                 }
                 else
                 {
                         this._context = this._canvas.getContext( "2d" );
-                        this.importObjects( root );
+                        for (var i=0;  i<nChildren;  i++)
+                        {
+                                child = jObj.children[i];
+                                this.importObjects( child );
+                        }
                         this.render();
                 }
         };
@@ -324,7 +335,10 @@ NinjaCvsRt.GLRuntime = function ( canvas, jObj,  assetPath )
                 obj.setWorld( this );
 
                 if (parent == null)
-                        this._geomRoot = obj;
+                {
+                        //this._geomRoot = obj;
+                        this._rootChildren.push( obj );
+                }
                 else
                         parent.addChild( obj );
         };
@@ -339,24 +353,31 @@ NinjaCvsRt.GLRuntime = function ( canvas, jObj,  assetPath )
                 }
         };
 
-        this.linkMaterials = function( obj )
+        this.linkMaterials = function( objArray )
         {
-                if (!obj)  return;
+                if (!objArray)  return;
 
-                // get the array of materials from the object
-                var matArray = obj._materials;
-                var nMats = matArray.length;
-                for (var i=0;  i<nMats;  i++)
+                for (var i=0;  i<objArray.length;  i++)
                 {
-                        var mat = matArray[i];
-                        var nodeName = mat._materialNodeName;
-                        var matNode = this.findMaterialNode( nodeName, this.myScene.scene );
-                        if (matNode)
+                        var obj = objArray[i];
+
+                        // get the array of materials from the object
+                        var matArray = obj._materials;
+                        var nMats = matArray.length;
+                        for (var j=0;  j<nMats;  j++)
                         {
-                                mat._materialNode = matNode;
-                                mat._shader = matNode.shaderProgram;
-                                this._materials.push( mat );
+                                var mat = matArray[j];
+                                var nodeName = mat._materialNodeName;
+                                var matNode = this.findMaterialNode( nodeName, this.myScene.scene );
+                                if (matNode)
+                                {
+                                        mat._materialNode = matNode;
+                                        mat._shader = matNode.shaderProgram;
+                                        this._materials.push( mat );
+                                }
                         }
+
+                        this.linkMaterials( obj.children );
                 }
         };
 
@@ -394,15 +415,24 @@ NinjaCvsRt.GLRuntime = function ( canvas, jObj,  assetPath )
 
         this.render = function( obj )
         {
-                if (!obj)  obj = this._geomRoot;
-                obj.render();
+                //if (!obj)  obj = this._geomRoot;
+                //obj.render();
+
+                var children;
+                if (obj)
+                {
+                        obj.render();
+                        children = obj.children;
+                }
+                else
+                        children = this._rootChildren;
 
-                if (obj.children)
+                if (children)
                 {
-                        var nKids = obj.children.length;
+                        var nKids = children.length;
                         for (var i=0;  i<nKids;  i++)
                         {
-                                var child = obj.children[i];
+                                var child = children[i];
                                 if (child)
                                         this.render( child );
                         }
@@ -702,9 +732,17 @@ NinjaCvsRt.RuntimeRectangle = function ()
         if (brRad > minDimen)  brRad = minDimen;
         if (trRad > minDimen)  trRad = minDimen;
 
+                var world = this.getWorld();
+                var vpw = world.getViewportWidth(), vph = world.getViewportHeight();
+                var cop = [0.5*vpw, 0.5*vph, 0.0];
+                var xCtr = cop[0] + this._xOffset,                                      yCtr = cop[1] - this._yOffset;
+                var xLeft = xCtr - 0.5*this._width,                                     yTop = yCtr - 0.5*this._height;
+                var xDist = cop[0] - xLeft,                                                     yDist = cop[1] - yTop;
+                var xOff = 0.5*vpw - xDist,                                                     yOff  = 0.5*vph - yDist;
+
                 if ((tlRad <= 0) && (blRad <= 0) && (brRad <= 0) && (trRad <= 0))
                 {
-                        ctx.rect(pt[0], pt[1], width - 2*inset, height - 2*inset);
+                        ctx.rect(pt[0]+xOff, pt[1]+yOff, width - 2*inset, height - 2*inset);
                 }
                 else
                 {
@@ -713,53 +751,53 @@ NinjaCvsRt.RuntimeRectangle = function ()
                         if (rad < 0)  rad = 0;
                         pt[1] += rad;
                         if (Math.abs(rad) < 0.001)  pt[1] = inset;
-                        ctx.moveTo( pt[0],  pt[1] );
+                        ctx.moveTo( pt[0]+xOff,  pt[1]+yOff );
 
                         // get the bottom left point
                         pt = [inset, height - inset];
                         rad = blRad - inset;
                         if (rad < 0)  rad = 0;
                         pt[1] -= rad;
-                        ctx.lineTo( pt[0],  pt[1] );
+                        ctx.lineTo( pt[0]+xOff,  pt[1]+yOff );
 
                         // get the bottom left curve
                         if (rad > 0.001)