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+/*
+ * Copyright 2010, 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.
+ */
+
+
+/**
+ * A DrawList gets used during rendering to collect DrawElements to
+ * render.  Each Material references a DrawList.  Depending on the material, as
+ * DrawElements get collected they will be put on different DrawLists.
+ * @constructor
+ */
+o3d.DrawList = function() {
+  this.list_ = [];
+};
+o3d.inherit('DrawList', 'NamedObject');
+
+/**
+ * Private list to actually hold the DrawElements
+ * @type {!Array.<!Object>}
+ */
+this.list_ = [];
+
+
+/**
+ * @type {number}
+ */
+o3d.DrawList.SortMethod = goog.typedef;
+
+
+/**
+ *  SortMethod,
+ *    BY_PERFORMANCE
+ *    BY_Z_ORDER
+ *    BY_PRIORITY
+ * 
+ * Method to sort DrawList by.
+ */
+o3d.DrawList.BY_PERFORMANCE = 0;
+o3d.DrawList.BY_Z_ORDER = 1;
+o3d.DrawList.BY_PRIORITY = 2;
+
+
+/**
+ * Renders the draw list.
+ */
+o3d.DrawList.prototype.render = function() {
+  // TODO(petersont): Add sort.
+
+  for (var i = 0; i < this.list_.length; ++i) {
+    var drawElementInfo = this.list_[i];
+    var world = drawElementInfo.world;
+    var view = drawElementInfo.view;
+    var projection = drawElementInfo.projection;
+    var transform = drawElementInfo.transform;
+    var drawElement = drawElementInfo.drawElement;
+    var element = drawElementInfo.drawElement.owner;
+    var material = drawElementInfo.drawElement.material ||
+                   drawElementInfo.drawElement.owner.material;
+    var effect = material.effect;
+
+    o3d.Param.SAS.setWorld(world);
+    o3d.Param.SAS.setView(view);
+    o3d.Param.SAS.setProjection(projection);
+
+    var paramObjects = [
+      transform,
+      drawElement,
+      element,
+      material,
+      effect,
+      o3d.Param.SAS
+    ];
+
+    material.effect.searchForParams(paramObjects);
+    element.render();
+  }
+};
+
+