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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');
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