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| 1 <!DOCTYPE html> | |
| 2 <!-- | |
| 3 Copyright (c) 2014 The Chromium Authors. All rights reserved. | |
| 4 Use of this source code is governed by a BSD-style license that can be | |
| 5 found in the LICENSE file. | |
| 6 --> | |
| 7 <link rel="import" href="/tracing/base/base.html"> | |
| 8 <link rel="import" href="/tracing/base/math.html"> | |
| 9 <link rel="import" href="/tracing/base/rect.html"> | |
| 10 | |
| 11 <script> | |
| 12 'use strict'; | |
| 13 | |
| 14 /** | |
| 15 * @fileoverview 2D bounding box computations. | |
| 16 */ | |
| 17 tr.exportTo('tr.b', function() { | |
| 18 /** | |
| 19 * Tracks a 2D bounding box. | |
| 20 * @constructor | |
| 21 */ | |
| 22 function BBox2() { | |
| 23 this.isEmpty_ = true; | |
| 24 this.min_ = undefined; | |
| 25 this.max_ = undefined; | |
| 26 } | |
| 27 | |
| 28 BBox2.prototype = { | |
| 29 __proto__: Object.prototype, | |
| 30 | |
| 31 reset: function() { | |
| 32 this.isEmpty_ = true; | |
| 33 this.min_ = undefined; | |
| 34 this.max_ = undefined; | |
| 35 }, | |
| 36 | |
| 37 get isEmpty() { | |
| 38 return this.isEmpty_; | |
| 39 }, | |
| 40 | |
| 41 addBBox2: function(bbox2) { | |
| 42 if (bbox2.isEmpty) | |
| 43 return; | |
| 44 this.addVec2(bbox2.min_); | |
| 45 this.addVec2(bbox2.max_); | |
| 46 }, | |
| 47 | |
| 48 clone: function() { | |
| 49 var bbox = new BBox2(); | |
| 50 bbox.addBBox2(this); | |
| 51 return bbox; | |
| 52 }, | |
| 53 | |
| 54 /** | |
| 55 * Adds x, y to the range. | |
| 56 */ | |
| 57 addXY: function(x, y) { | |
| 58 if (this.isEmpty_) { | |
| 59 this.max_ = vec2.create(); | |
| 60 this.min_ = vec2.create(); | |
| 61 vec2.set(this.max_, x, y); | |
| 62 vec2.set(this.min_, x, y); | |
| 63 this.isEmpty_ = false; | |
| 64 return; | |
| 65 } | |
| 66 this.max_[0] = Math.max(this.max_[0], x); | |
| 67 this.max_[1] = Math.max(this.max_[1], y); | |
| 68 this.min_[0] = Math.min(this.min_[0], x); | |
| 69 this.min_[1] = Math.min(this.min_[1], y); | |
| 70 }, | |
| 71 | |
| 72 /** | |
| 73 * Adds value_x, value_y in the form [value_x,value_y] to the range. | |
| 74 */ | |
| 75 addVec2: function(value) { | |
| 76 if (this.isEmpty_) { | |
| 77 this.max_ = vec2.create(); | |
| 78 this.min_ = vec2.create(); | |
| 79 vec2.set(this.max_, value[0], value[1]); | |
| 80 vec2.set(this.min_, value[0], value[1]); | |
| 81 this.isEmpty_ = false; | |
| 82 return; | |
| 83 } | |
| 84 this.max_[0] = Math.max(this.max_[0], value[0]); | |
| 85 this.max_[1] = Math.max(this.max_[1], value[1]); | |
| 86 this.min_[0] = Math.min(this.min_[0], value[0]); | |
| 87 this.min_[1] = Math.min(this.min_[1], value[1]); | |
| 88 }, | |
| 89 | |
| 90 addQuad: function(quad) { | |
| 91 this.addVec2(quad.p1); | |
| 92 this.addVec2(quad.p2); | |
| 93 this.addVec2(quad.p3); | |
| 94 this.addVec2(quad.p4); | |
| 95 }, | |
| 96 | |
| 97 get minVec2() { | |
| 98 if (this.isEmpty_) | |
| 99 return undefined; | |
| 100 return this.min_; | |
| 101 }, | |
| 102 | |
| 103 get maxVec2() { | |
| 104 if (this.isEmpty_) | |
| 105 return undefined; | |
| 106 return this.max_; | |
| 107 }, | |
| 108 | |
| 109 get sizeAsVec2() { | |
| 110 if (this.isEmpty_) | |
| 111 throw new Error('Empty BBox2 has no size'); | |
| 112 var size = vec2.create(); | |
| 113 vec2.subtract(size, this.max_, this.min_); | |
| 114 return size; | |
| 115 }, | |
| 116 | |
| 117 get size() { | |
| 118 if (this.isEmpty_) | |
| 119 throw new Error('Empty BBox2 has no size'); | |
| 120 return {width: this.max_[0] - this.min_[0], | |
| 121 height: this.max_[1] - this.min_[1]}; | |
| 122 }, | |
| 123 | |
| 124 get width() { | |
| 125 if (this.isEmpty_) | |
| 126 throw new Error('Empty BBox2 has no width'); | |
| 127 return this.max_[0] - this.min_[0]; | |
| 128 }, | |
| 129 | |
| 130 get height() { | |
| 131 if (this.isEmpty_) | |
| 132 throw new Error('Empty BBox2 has no width'); | |
| 133 return this.max_[1] - this.min_[1]; | |
| 134 }, | |
| 135 | |
| 136 toString: function() { | |
| 137 if (this.isEmpty_) | |
| 138 return 'empty'; | |
| 139 return 'min=(' + this.min_[0] + ',' + this.min_[1] + ') ' + | |
| 140 'max=(' + this.max_[0] + ',' + this.max_[1] + ')'; | |
| 141 }, | |
| 142 | |
| 143 asRect: function() { | |
| 144 return tr.b.Rect.fromXYWH( | |
| 145 this.min_[0], | |
| 146 this.min_[1], | |
| 147 this.max_[0] - this.min_[0], | |
| 148 this.max_[1] - this.min_[1]); | |
| 149 } | |
| 150 }; | |
| 151 | |
| 152 return { | |
| 153 BBox2, | |
| 154 }; | |
| 155 }); | |
| 156 </script> | |
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Chromium Code Reviews
Issue 2771723003:
[tracing] Move math utilities from base into their own subdirectory (attempt 2) (Closed)
