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+/*
+ * Copyright 2009, Google Inc.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ *     * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *     * Redistributions in binary form must reproduce the above
+ * copyright notice, this list of conditions and the following disclaimer
+ * in the documentation and/or other materials provided with the
+ * distribution.
+ *     * Neither the name of Google Inc. nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+
+/**
+ * @fileoverview This file contains various functions for helping setup
+ * shapes for o3d.  It puts them in the "shape" module on the o3djs
+ * object.
+ *
+ *     Note: This library is only a sample. It is not meant to be some official
+ *     library. It is provided only as example code.
+ *
+ */
+
+o3djs.provide('o3djs.shape');
+
+o3djs.require('o3djs.math');
+o3djs.require('o3djs.element');
+
+/**
+ * A Module for shapes.
+ * @namespace
+ */
+o3djs.shape = o3djs.shape || {};
+
+/**
+ * Adds missing tex coord streams to a shape's elements.
+ * @param {!o3d.Shape} shape Shape to add missing streams to.
+ * @see o3djs.element.addMissingTexCoordStreams
+ */
+o3djs.shape.addMissingTexCoordStreams = function(shape) {
+  var elements = shape.elements;
+  for (var ee = 0; ee < elements.length; ++ee) {
+    var element = elements[ee];
+    o3djs.element.addMissingTexCoordStreams(element);
+  }
+};
+
+/**
+ * Sets the bounding box and z sort points of a shape's elements.
+ * @param {!o3d.Shape} shape Shape to set info on.
+ */
+o3djs.shape.setBoundingBoxesAndZSortPoints = function(shape) {
+  var elements = shape.elements;
+  for (var ee = 0; ee < elements.length; ++ee) {
+    var element = elements[ee];
+    o3djs.element.setBoundingBoxAndZSortPoint(element);
+  }
+};
+
+/**
+ * Prepares a shape by setting its boundingBox, zSortPoint and creating
+ * DrawElements.
+ * @param {!o3d.Pack} pack Pack to manage created objects.
+ * @param {!o3d.Shape} shape Shape to prepare.
+ */
+o3djs.shape.prepareShape = function(pack, shape) {
+  shape.createDrawElements(pack, null);
+  o3djs.shape.setBoundingBoxesAndZSortPoints(shape);
+  o3djs.shape.addMissingTexCoordStreams(shape);
+};
+
+/**
+ * Prepares all the shapes in the given pack by setting their boundingBox,
+ * zSortPoint and creating DrawElements.
+ * @param {!o3d.Pack} pack Pack to manage created objects.
+ */
+o3djs.shape.prepareShapes = function(pack) {
+  var shapes = pack.getObjectsByClassName('o3d.Shape');
+  for (var ss = 0; ss < shapes.length; ++ss) {
+    o3djs.shape.prepareShape(pack, shapes[ss]);
+  }
+};
+
+/**
+ * Attempts to delete the parts of a shape that were created by
+ * duplicateShape as well as any drawElements attached to it.
+ * @param {!o3d.Shape} shape shape to delete.
+ * @param {!o3d.Pack} pack Pack to release objects from.
+ */
+o3djs.shape.deleteDuplicateShape = function(shape, pack) {
+   var elements = shape.elements;
+   for (var ee = 0; ee < elements.length; ee++) {
+     var element = elements[ee];
+     var drawElements = element.drawElements;
+     for (var dd = 0; dd < drawElements.length; dd++) {
+       var drawElement = drawElements[dd];
+       pack.removeObject(drawElement);
+     }
+     pack.removeObject(element);
+   }
+   pack.removeObject(shape);
+};
+
+/**
+ * Copies a shape's elements and streambank or buffers so the two will share
+ * streambanks, vertex and index buffers.
+ * @param {!o3d.Pack} pack Pack to manage created objects.
+ * @param {!o3d.Shape} source The Shape to copy.
+ * @return {!o3d.Shape} the new copy of the shape.
+ */
+o3djs.shape.duplicateShape = function(pack, source) {
+  var newShape = pack.createObject('Shape');
+  var elements = source.elements;
+  for (var ee = 0; ee < elements.length; ee++) {
+    var newElement = o3djs.element.duplicateElement(pack, elements[ee]);
+    newElement.owner = newShape;
+  }
+  newShape.createDrawElements(pack, null);
+  return newShape;
+};
+