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0.1.11 FastTrig
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rob tillaart
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@ -1,3 +1,18 @@
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platforms:
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rpipico:
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board: rp2040:rp2040:rpipico
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package: rp2040:rp2040
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gcc:
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features:
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defines:
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- ARDUINO_ARCH_RP2040
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warnings:
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flags:
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packages:
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rp2040:rp2040:
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url: https://github.com/earlephilhower/arduino-pico/releases/download/global/package_rp2040_index.json
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compile:
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# Choosing to run compilation tests on 2 different Arduino platforms
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platforms:
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@ -9,3 +24,5 @@ compile:
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- esp32
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# - esp8266
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# - mega2560
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- rpipico
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88
libraries/FastTrig/CHANGELOG.md
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88
libraries/FastTrig/CHANGELOG.md
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# Change Log FastTrig
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All notable changes to this project will be documented in this file.
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The format is based on [Keep a Changelog](http://keepachangelog.com/)
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and this project adheres to [Semantic Versioning](http://semver.org/).
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## [0.1.11] - 2022-11-02
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- add changelog.md
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- add rp2040 to build-CI
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- moved version info from readme.md to changelog
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- no functional changes
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## [0.1.10 2022-04-15
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- fix #12
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- split .h in .h and .cpp Needed in case of more complex projects.
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## [0.1.9] - 2021-12-18
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- update Arduino-CI, badges,
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- update library.json
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- minor edits
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## [0.1.8] - 2021-08-10
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- made % 180 conditional in itan() => performance gain
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- added icot() cotangent.
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## [0.1.7] - 2021-04-23
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-fix for PlatformIO
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## [0.1.6] - 2020-12-23
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- Arduino-CI + unit tests
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## [0.1.5] - 2020-09-11
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- fixed optimize
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- new table
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- added iasin() and iacos()
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In (0.1.4) an error was found in the optimize algorithm, so for 0.1.5
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it was ran again and accuracy improved for **isin()** and **icos()**.
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However **itan()** lost a (smaller) bit.
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The gain outweighs the loss and so new table is kept.
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Performance has not changed.
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An initial version of a reverse lookup for **iasin(val)** and **iacos(val)**
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is added, as it uses the same **isintable16\[\]** interpolation table.
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There is no **atan()** or **atan2()** replacement.
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## [0.1.4] - 2020-09-08
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- rewrite itan()
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- cleanup
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- examples
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The library (0.1.4) provides an **itan()** which improved accuracy
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upon the (0.1.3) version and performance for the ESP32.
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Performance on AVR (UNO) is still an issue, accuracy is OK.
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## [0.1.3] - 2020-09-07
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- initial release.
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## [0.1.2] - 2020-09-06
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- optimize 16 bit table with example sketch
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## [0.1.1] - 2020-08-30
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- refactor
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- create a library out of it.
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- itan() approximation is bad.
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_eons passed_
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----
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## [0.1.02] - 2011-08-20
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- added interpolation
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## [0.1.01] - 2011-08-18
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- improved tables a bit
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- changed param to float
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## [0.1.00] - 2011-08-18
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- initial version
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@ -1,36 +1,16 @@
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//
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// FILE: FastTrig.cpp
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.10
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// VERSION: 0.1.11
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// PURPOSE: Arduino library for a faster approximation of sin() and cos()
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// DATE: 2011-08-18
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// URL: https://github.com/RobTillaart/FastTrig
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// https://forum.arduino.cc/index.php?topic=69723.0
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//
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// HISTORY:
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// 0.1.00 2011-08-18 initial version
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// 0.1.01 2011-08-18 improved tables a bit + changed param to float
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// 0.1.02 2011-08-20 added interpolation
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// eons passed
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// 0.1.1 2020-08-30 refactor, create a library out of it.
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// itan() approximation is bad.
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// 0.1.2 2020-09-06 optimize 16 bit table with example sketch
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// 0.1.3 2020-09-07 initial release.
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// 0.1.4 2020-09-08 rewrite itan() + cleanup + examples
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// 0.1.5 2020-09-11 fixed optimize, new table, added iasin() and iacos()
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// 0.1.6 2020-12-23 Arduino-CI + unit tests
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// 0.1.7 2021-04-23 fix for PlatformIO
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// 0.1.8 2021-08-10 made % 180 conditional in itan() => performance gain
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// added icot() cotangent.
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// 0.1.9 2021-12-18 update Arduino-CI, badges,
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// update library.json, minor edits
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// 0.1.10 2022-04-15 fix #12 split .h in .h and .cpp
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#include "FastTrig.h"
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// 91 x 2 bytes ==> 182 bytes
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// use 65535.0 as divider
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uint16_t isinTable16[] = {
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@ -2,16 +2,19 @@
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//
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// FILE: FastTrig.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.10
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// VERSION: 0.1.11
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// PURPOSE: Arduino library for a faster approximation of sin() and cos()
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// DATE: 2011-08-18
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// URL: https://github.com/RobTillaart/FastTrig
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// https://forum.arduino.cc/index.php?topic=69723.0
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//
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// HISTORY: see changelog.md
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#include "Arduino.h"
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#define FAST_TRIG_LIB_VERSION (F("0.1.10"))
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#define FAST_TRIG_LIB_VERSION (F("0.1.11"))
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extern uint16_t isinTable16[];
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@ -139,7 +139,6 @@ Please, verify the accuracy to see if it meets your requirements.
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(added 0.1.5)
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ESP32 calls -1 ..+1 step 0.001 degree
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| function | max abs error | avg abs error | max rel error | avg rel error |
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@ -169,48 +168,9 @@ UNO calls -1 ..+1 step 0.001 degree
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Please, verify the accuracy to see if it meets your requirements.
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## 0.1.4
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## versions
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The library (0.1.4) provides an **itan()** which improved accuracy
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upon the (0.1.3) version and performance for the ESP32.
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Performance on AVR (UNO) is still an issue, accuracy is OK.
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## 0.1.5
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In (0.1.4) an error was found in the optimize algorithm, so for 0.1.5
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it was ran again and accuracy improved for **isin()** and **icos()**.
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However **itan()** lost a (smaller) bit.
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The gain outweighs the loss and so new table is kept.
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Performance has not changed.
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An initial version of a reverse lookup for **iasin(val)** and **iacos(val)**
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is added, as it uses the same **isintable16\[\]** interpolation table.
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There is no **atan()** or **atan2()** replacement.
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## 0.1.6
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- Arduino-CI + unit tests
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## 0.1.7
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- fix for PlatformIO
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## 0.1.8
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- Made the % 180 in the **itan()** conditional.
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- added **icot(f)**
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## 0.1.9
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- update library.json, badges, version string, minor edits.
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## 0.1.10
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- split .h in .h and .cpp. Needed in case of more complex projects.
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See changelog.md
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## Operation
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@ -221,6 +181,4 @@ See examples
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## Future
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- How to improve the accuracy of the whole degrees, as now the table is optimized for interpolation.
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- version info in release_notes.md file.
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- separate releaseNotes.md
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- sinc(x) = sin(x)/x function.?
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@ -15,7 +15,7 @@
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"type": "git",
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"url": "https://github.com/RobTillaart/FastTrig"
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},
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"version": "0.1.10",
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"version": "0.1.11",
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"license": "MIT",
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"frameworks": "*",
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"platforms": "*",
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@ -1,5 +1,5 @@
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name=FastTrig
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version=0.1.10
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version=0.1.11
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author=Rob Tillaart <rob.tillaart@gmail.com><pete.thompson@yahoo.com>
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maintainer=Rob Tillaart <rob.tillaart@gmail.com>
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sentence=Arduino library with interpolated lookup for sin() and cos()
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