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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 Field is a base class that manages a set of components in a
+ * Buffer of a specific type. Fields are managed by Buffers and can not be
+ * directly created. When a Buffer is destroyed or if a Field is removed from a
+ * Buffer the Field's buffer property will be set to null.
+ * @constructor
+ */
+o3d.Field = function() { };
+o3d.inherit('Field', 'NamedObject');
+
+/**
+ * The number of components in this field.
+ * @type {number}
+ */
+o3d.Field.prototype.numComponents = 0;
+
+
+/**
+ * The Buffer the field belongs to.
+ * @type {o3d.Buffer}
+ */
+o3d.Field.prototype.buffer = null;
+
+
+/**
+ * The offset of this field in the Buffer.
+ * @type {number}
+ */
+o3d.Field.prototype.offset_ = 0;
+
+
+/**
+ * The size of one element of this field.
+ * @type {number}
+ */
+o3d.Field.prototype.size = 0;
+
+
+/**
+ * Sets the values of the data stored in the field.
+ * 
+ * The buffer for the field  must have already been created either through
+ * buffer.set or through buffer.allocateElements.
+ * 
+ * The number of values passed in must be a multiple of the number of
+ * components needed for the field.
+ * 
+ * @param {number} start_index index of first value to set.
+ * @param {number} values Values to be stored in the buffer starting at index.
+ */
+o3d.Field.prototype.setAt =
+    function(start_index, values) {
+  this.buffer.lock();
+  var l = values.length / this.numComponents;
+  for (var i = 0; i < l; i++) {
+    for (var c = 0; c < this.numComponents; ++c) {
+      this.buffer.array_[
+          (start_index + i) * this.buffer.totalComponents + this.offset_ + c] =
+              values[this.numComponents * i + c];
+    }
+  }
+  this.buffer.unlock();
+  return true;
+};
+
+
+/**
+ * Gets the values stored in the field.
+ * 
+ * @param {number} start_index index of the first value to get.
+ * @param {number} num_elements number of elements to read from field.
+ * @returns {number}  The values of the field.
+ */
+o3d.Field.prototype.getAt =
+    function(start_index, num_elements) {
+  o3d.notImplemented();
+};
+
+
+
+/**
+ * A field that contains floating point numbers.
+ * @constructor
+ */
+o3d.FloatField = function() { };
+o3d.inherit('FloatField', 'Field');
+
+/**
+ * A field that contains unsigned integers.
+ * @constructor
+ */
+o3d.UInt32Field = function() { };
+o3d.inherit('UInt32Field', 'Field');
+
+/**
+ * A field that contains unsigned bytes.
+ * @constructor
+ */
+o3d.UByteNField = function() { };
+o3d.inherit('UByteNField', 'Field');
+
+