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Issue 2771723003: [tracing] Move math utilities from base into their own subdirectory (attempt 2) (Closed)
Patch Set: rebase Created 3 years, 9 months ago
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1 <!DOCTYPE html> 1 <!DOCTYPE html>
2 <!-- 2 <!--
3 Copyright (c) 2014 The Chromium Authors. All rights reserved. 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 4 Use of this source code is governed by a BSD-style license that can be
5 found in the LICENSE file. 5 found in the LICENSE file.
6 --> 6 -->
7 <link rel="import" href="/tracing/base/base.html"> 7 <link rel="import" href="/tracing/base/base.html">
8 <script src="/gl-matrix-min.js"></script> 8 <script src="/gl-matrix-min.js"></script>
9 9
10 <script> 10 <script>
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23 for (var exportName in glMatrixModule) { 23 for (var exportName in glMatrixModule) {
24 global[exportName] = glMatrixModule[exportName]; 24 global[exportName] = glMatrixModule[exportName];
25 } 25 }
26 } 26 }
27 })(this); 27 })(this);
28 </script> 28 </script>
29 29
30 <script> 30 <script>
31 'use strict'; 31 'use strict';
32 32
33 tr.exportTo('tr.b', function() { 33 tr.exportTo('tr.b.math', function() {
34 var PREFERRED_NUMBER_SERIES_MULTIPLIERS = [1, 2, 5, 10]; 34 var PREFERRED_NUMBER_SERIES_MULTIPLIERS = [1, 2, 5, 10];
35 35
36 /* Returns true when x and y are within delta of each other. */ 36 /* Returns true when x and y are within delta of each other. */
37 function approximately(x, y, delta) { 37 function approximately(x, y, delta) {
38 if (delta === undefined) 38 if (delta === undefined)
39 delta = 1e-9; 39 delta = 1e-9;
40 return Math.abs(x - y) < delta; 40 return Math.abs(x - y) < delta;
41 } 41 }
42 42
43 function clamp(x, lo, hi) { 43 function clamp(x, lo, hi) {
(...skipping 164 matching lines...) Expand 10 before | Expand all | Expand 10 after
208 208
209 /** 209 /**
210 * Uses the 1-2-5 series to find the closest prefered number to min 210 * Uses the 1-2-5 series to find the closest prefered number to min
211 * whose absolute value is at least the absolute value of |min|. 211 * whose absolute value is at least the absolute value of |min|.
212 * https://en.wikipedia.org/wiki/Preferred_number 212 * https://en.wikipedia.org/wiki/Preferred_number
213 */ 213 */
214 function preferredNumberLargerThanMin(min) { 214 function preferredNumberLargerThanMin(min) {
215 var absMin = Math.abs(min); 215 var absMin = Math.abs(min);
216 // The conservative guess is the largest power of 10 less than 216 // The conservative guess is the largest power of 10 less than
217 // or equal to |absMin|. 217 // or equal to |absMin|.
218 var conservativeGuess = tr.b.lesserPower(absMin); 218 var conservativeGuess = tr.b.math.lesserPower(absMin);
219 var minPreferedNumber = undefined; 219 var minPreferedNumber = undefined;
220 for (var multiplier of PREFERRED_NUMBER_SERIES_MULTIPLIERS) { 220 for (var multiplier of PREFERRED_NUMBER_SERIES_MULTIPLIERS) {
221 var tightenedGuess = conservativeGuess * multiplier; 221 var tightenedGuess = conservativeGuess * multiplier;
222 if (tightenedGuess >= absMin) { 222 if (tightenedGuess >= absMin) {
223 minPreferedNumber = tightenedGuess; 223 minPreferedNumber = tightenedGuess;
224 break; 224 break;
225 } 225 }
226 } 226 }
227 if (minPreferedNumber === undefined) { 227 if (minPreferedNumber === undefined) {
228 throw new Error('Could not compute preferred number for ' + min); 228 throw new Error('Could not compute preferred number for ' + min);
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239 deg2rad, 239 deg2rad,
240 erf, 240 erf,
241 lesserPower, 241 lesserPower,
242 greaterPower, 242 greaterPower,
243 lesserWholeNumber, 243 lesserWholeNumber,
244 greaterWholeNumber, 244 greaterWholeNumber,
245 preferredNumberLargerThanMin, 245 preferredNumberLargerThanMin,
246 }; 246 };
247 }); 247 });
248 </script> 248 </script>
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