| // 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 Implements a 3D ray that are compatible with WebGL. |
| * Each element is a float64 in case high precision is required. |
| * The API is structured to avoid unnecessary memory allocations. |
| * The last parameter will typically be the output vector and an |
| * object can be both an input and output parameter to all methods |
| * except where noted. |
| * |
| */ |
| goog.provide('goog.vec.Ray'); |
| |
| goog.require('goog.vec.Vec3'); |
| |
| |
| |
| /** |
| * Constructs a new ray with an optional origin and direction. If not specified, |
| * the default is [0, 0, 0]. |
| * @param {goog.vec.Vec3.AnyType=} opt_origin The optional origin. |
| * @param {goog.vec.Vec3.AnyType=} opt_dir The optional direction. |
| * @constructor |
| * @final |
| */ |
| goog.vec.Ray = function(opt_origin, opt_dir) { |
| /** |
| * @type {goog.vec.Vec3.Float64} |
| */ |
| this.origin = goog.vec.Vec3.createFloat64(); |
| if (opt_origin) { |
| goog.vec.Vec3.setFromArray(this.origin, opt_origin); |
| } |
| |
| /** |
| * @type {goog.vec.Vec3.Float64} |
| */ |
| this.dir = goog.vec.Vec3.createFloat64(); |
| if (opt_dir) { |
| goog.vec.Vec3.setFromArray(this.dir, opt_dir); |
| } |
| }; |
| |
| |
| /** |
| * Sets the origin and direction of the ray. |
| * @param {goog.vec.AnyType} origin The new origin. |
| * @param {goog.vec.AnyType} dir The new direction. |
| */ |
| goog.vec.Ray.prototype.set = function(origin, dir) { |
| goog.vec.Vec3.setFromArray(this.origin, origin); |
| goog.vec.Vec3.setFromArray(this.dir, dir); |
| }; |
| |
| |
| /** |
| * Sets the origin of the ray. |
| * @param {goog.vec.AnyType} origin the new origin. |
| */ |
| goog.vec.Ray.prototype.setOrigin = function(origin) { |
| goog.vec.Vec3.setFromArray(this.origin, origin); |
| }; |
| |
| |
| /** |
| * Sets the direction of the ray. |
| * @param {goog.vec.AnyType} dir The new direction. |
| */ |
| goog.vec.Ray.prototype.setDir = function(dir) { |
| goog.vec.Vec3.setFromArray(this.dir, dir); |
| }; |
| |
| |
| /** |
| * Returns true if this ray is equal to the other ray. |
| * @param {goog.vec.Ray} other The other ray. |
| * @return {boolean} True if this ray is equal to the other ray. |
| */ |
| goog.vec.Ray.prototype.equals = function(other) { |
| return other != null && |
| goog.vec.Vec3.equals(this.origin, other.origin) && |
| goog.vec.Vec3.equals(this.dir, other.dir); |
| }; |