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// Copyright 2011 The Closure Library Authors. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS-IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
/**
* @fileoverview Supplies a Float64Array implementation that implements
* most of the Float64Array spec and that can be used when a built-in
* implementation is not available.
*
* Note that if no existing Float64Array implementation is found then this
* class and all its public properties are exported as Float64Array.
*
* Adding support for the other TypedArray classes here does not make sense
* since this vector math library only needs Float32Array and Float64Array.
*
*/
goog.provide('goog.vec.Float64Array');
/**
* Constructs a new Float64Array. The new array is initialized to all zeros.
*
* @param {goog.vec.Float64Array|Array|ArrayBuffer|number} p0
* The length of the array, or an array to initialize the contents of the
* new Float64Array.
* @constructor
*/
goog.vec.Float64Array = function(p0) {
this.length = p0.length || p0;
for (var i = 0; i < this.length; i++) {
this[i] = p0[i] || 0;
}
};
/**
* The number of bytes in an element (as defined by the Typed Array
* specification).
*
* @type {number}
*/
goog.vec.Float64Array.BYTES_PER_ELEMENT = 8;
/**
* The number of bytes in an element (as defined by the Typed Array
* specification).
*
* @type {number}
*/
goog.vec.Float64Array.prototype.BYTES_PER_ELEMENT = 8;
/**
* Sets elements of the array.
* @param {Array.<number>|Float64Array} values The array of values.
* @param {number=} opt_offset The offset in this array to start.
*/
goog.vec.Float64Array.prototype.set = function(values, opt_offset) {
opt_offset = opt_offset || 0;
for (var i = 0; i < values.length && opt_offset + i < this.length; i++) {
this[opt_offset + i] = values[i];
}
};
/**
* Creates a string representation of this array.
* @return {string} The string version of this array.
* @override
*/
goog.vec.Float64Array.prototype.toString = Array.prototype.join;
/**
* Note that we cannot implement the subarray() or (deprecated) slice()
* methods properly since doing so would require being able to overload
* the [] operator which is not possible in javascript. So we leave
* them unimplemented. Any attempt to call these methods will just result
* in a javascript error since we leave them undefined.
*/
/**
* If no existing Float64Array implementation is found then we export
* goog.vec.Float64Array as Float64Array.
*/
if (typeof Float64Array == 'undefined') {
goog.exportProperty(goog.vec.Float64Array, 'BYTES_PER_ELEMENT',
goog.vec.Float64Array.BYTES_PER_ELEMENT);
goog.exportProperty(goog.vec.Float64Array.prototype, 'BYTES_PER_ELEMENT',
goog.vec.Float64Array.prototype.BYTES_PER_ELEMENT);
goog.exportProperty(goog.vec.Float64Array.prototype, 'set',
goog.vec.Float64Array.prototype.set);
goog.exportProperty(goog.vec.Float64Array.prototype, 'toString',
goog.vec.Float64Array.prototype.toString);
goog.exportSymbol('Float64Array', goog.vec.Float64Array);
}
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