├── LICENSE ├── README.md ├── examples └── Example │ └── Example.ino ├── images ├── arduino-easing-in-out.png └── arduino-easing-modes.png ├── keywords.txt ├── library.properties └── src ├── EasingLib.cpp └── EasingLib.h /LICENSE: -------------------------------------------------------------------------------- 1 | Apache License 2 | Version 2.0, January 2004 3 | http://www.apache.org/licenses/ 4 | 5 | TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION 6 | 7 | 1. Definitions. 8 | 9 | "License" shall mean the terms and conditions for use, reproduction, 10 | and distribution as defined by Sections 1 through 9 of this document. 11 | 12 | "Licensor" shall mean the copyright owner or entity authorized by 13 | the copyright owner that is granting the License. 14 | 15 | "Legal Entity" shall mean the union of the acting entity and all 16 | other entities that control, are controlled by, or are under common 17 | control with that entity. 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We also recommend that a 185 | file or class name and description of purpose be included on the 186 | same "printed page" as the copyright notice for easier 187 | identification within third-party archives. 188 | 189 | Copyright [yyyy] [name of copyright owner] 190 | 191 | Licensed under the Apache License, Version 2.0 (the "License"); 192 | you may not use this file except in compliance with the License. 193 | You may obtain a copy of the License at 194 | 195 | http://www.apache.org/licenses/LICENSE-2.0 196 | 197 | Unless required by applicable law or agreed to in writing, software 198 | distributed under the License is distributed on an "AS IS" BASIS, 199 | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 200 | See the License for the specific language governing permissions and 201 | limitations under the License. 202 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Arduino Easing Library 2 | Arduino library that implement easing functions for smoothing variable changes. (For example, for changing a motor speed smoothly) 3 | 4 | Just create a new `Easing` instance, and use `=` operator to set the new SetPoint. Then, use `GetValue()` function to get the smooth value. 5 | 6 | Easing interval can be set in the `Easing` constructor, or change with `SetMillisInterval()` or `SetMicrosInterval()` methods. Aditionally, can use `Init()` to inmediately change both Setpoint and variable. 7 | 8 | ## Easing modes 9 | ### Available modes 10 | LINEAR 11 | EASE_IN_QUAD 12 | EASE_OUT_QUAD 13 | EASE_IN_OUT_QUAD 14 | EASE_IN_CUBIC 15 | EASE_OUT_CUBIC 16 | EASE_IN_OUT_CUBIC 17 | EASE_IN_QUART 18 | EASE_OUT_QUART 19 | EASE_IN_OUT_QUART 20 | EASE_IN_QUINT 21 | EASE_OUT_QUINT 22 | EASE_IN_OUT_QUINT 23 | 24 | ### Easing order 25 | Five function orders available (LINEAR, QUAD, CUBIC, QUART, QUINT). The higher order, the smoother the response transition (but high slope in the mid transition). Default CUBIC. 26 | ![Image](https://github.com/luisllamasbinaburo/Arduino-Easing/blob/master/images/arduino-easing-modes.png) 27 | 28 | ### Easing IN, OUT or IN-OUT 29 | Three transitions available (IN, OT and IN-OUT) 30 | ![Image](https://github.com/luisllamasbinaburo/Arduino-Easing/blob/master/images/arduino-easing-in-out.png) 31 | 32 | 33 | ## Example 34 | ```c++ 35 | #include "EasingLib.h" 36 | 37 | int values[8] = { 0, 1000, 4000, 2000, 1000, 3000, 5000, 1000 }; 38 | 39 | // Default constructor (EASE_IN_OUT_CUBIC, 1000ms) 40 | Easing easing(); 41 | 42 | // Full constructor 43 | // Easing easing(ease_mode::LINEAR, 500); 44 | 45 | void setup() 46 | { 47 | while (!Serial){}; 48 | 49 | Serial.begin(115200); 50 | 51 | for(auto i = 0; i < 240; i++) 52 | { 53 | auto index = i / 30; 54 | float newValue = values[index]; 55 | 56 | Serial.print(newValue); 57 | Serial.print(','); 58 | Serial.println(easing.SetSetpoint(newValue)); 59 | 60 | delay(50); 61 | } 62 | } 63 | 64 | void loop() 65 | { 66 | } 67 | ``` 68 | -------------------------------------------------------------------------------- /examples/Example/Example.ino: -------------------------------------------------------------------------------- 1 | /*************************************************** 2 | Copyright (c) 2019 Luis Llamas 3 | (www.luisllamas.es) 4 | 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 5 | 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 6 | ****************************************************/ 7 | 8 | #include "EasingLib.h" 9 | 10 | int values[8] = { 0, 1000, 4000, 2000, 1000, 3000, 5000, 1000 }; 11 | 12 | // Default constructor (EASE_IN_OUT_CUBIC, 1000ms) 13 | Easing easing(); 14 | 15 | // Full constructor 16 | // Easing easing(ease_mode::LINEAR, 500); 17 | 18 | void setup() 19 | { 20 | while (!Serial){}; 21 | 22 | Serial.begin(115200); 23 | 24 | for(auto i = 0; i < 240; i++) 25 | { 26 | auto index = i / 30; 27 | float newValue = values[index]; 28 | 29 | Serial.print(newValue); 30 | Serial.print(','); 31 | Serial.println(easing.SetSetpoint(newValue)); 32 | 33 | delay(50); 34 | } 35 | } 36 | 37 | void loop() 38 | { 39 | } 40 | -------------------------------------------------------------------------------- /images/arduino-easing-in-out.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/luisllamasbinaburo/Arduino-Easing/f01f67cb549c48850856a3cda327c299419d86cb/images/arduino-easing-in-out.png -------------------------------------------------------------------------------- /images/arduino-easing-modes.png: -------------------------------------------------------------------------------- https://raw.githubusercontent.com/luisllamasbinaburo/Arduino-Easing/f01f67cb549c48850856a3cda327c299419d86cb/images/arduino-easing-modes.png -------------------------------------------------------------------------------- /keywords.txt: -------------------------------------------------------------------------------- 1 | ####################################### 2 | # Syntax Coloring Map MyName 3 | ####################################### 4 | 5 | ####################################### 6 | # Datatypes (KEYWORD1) 7 | ####################################### 8 | Easying KEYWORD1 9 | 10 | ####################################### 11 | # Methods and Functions (KEYWORD2) 12 | ####################################### 13 | Init KEYWORD2 14 | GetSetpoint KEYWORD2 15 | SetSetpoint KEYWORD2 16 | GetValue KEYWORD2 17 | SetMillisInterval KEYWORD2 18 | SetMicrosInterval KEYWORD2 19 | SetMode KEYWORD2 20 | 21 | ####################################### 22 | # Constants (LITERAL1) 23 | ####################################### 24 | -------------------------------------------------------------------------------- /library.properties: -------------------------------------------------------------------------------- 1 | name=EasyingLib 2 | version=1.0.0 3 | author=Luis Llamas 4 | maintainer=Luis Llamas 5 | sentence=Arduino library that implements easing functions for smooth property value change transitions 6 | paragraph=Arduino library that implements easing functions for smooth property value change transitions 7 | category=Other 8 | url=https://github.com/luisllamasbinaburo/Arduino-Easing 9 | architectures=* 10 | -------------------------------------------------------------------------------- /src/EasingLib.cpp: -------------------------------------------------------------------------------- 1 | /*************************************************** 2 | Copyright (c) 2019 Luis Llamas 3 | (www.luisllamas.es) 4 | 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 5 | 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 6 | ****************************************************/ 7 | 8 | #include "EasingLib.h" 9 | 10 | Easing::Easing() 11 | { 12 | _startPoint = 0; 13 | _setPoint = 0; 14 | _active = false; 15 | SetMode(ease_mode::EASE_IN_OUT_QUINT); 16 | easingFunction = &Easing::easeInOutCubic; 17 | _easyDuration = 1000000; 18 | } 19 | 20 | Easing::Easing(ease_mode mode, unsigned long millisInterval) 21 | { 22 | _startPoint = 0; 23 | _setPoint = 0; 24 | _active = false; 25 | SetMode(mode); 26 | _easyDuration = millisInterval * 1000; 27 | } 28 | 29 | void Easing::Init(float value) 30 | { 31 | _setPoint = value; 32 | _startPoint = value; 33 | _currentValue = value; 34 | } 35 | 36 | float Easing::operator=(float value) 37 | { 38 | return SetSetpoint(value); 39 | } 40 | 41 | Easing::operator float() 42 | { 43 | return GetValue(); 44 | } 45 | 46 | float Easing::GetSetpoint(float value) 47 | { 48 | return _setPoint; 49 | } 50 | 51 | float Easing::SetSetpoint(float value) 52 | { 53 | if (value == _setPoint) return GetValue(); 54 | 55 | _setPoint = value; 56 | _startPoint = _currentValue; 57 | _startTime = micros(); 58 | _active = true; 59 | return _currentValue; 60 | } 61 | 62 | float Easing::GetValue() 63 | { 64 | if (!_active) return _currentValue; 65 | 66 | unsigned long elapsedTime = micros() - _startTime; 67 | if (elapsedTime >= _easyDuration) 68 | { 69 | _active = false; 70 | _startPoint = _setPoint; 71 | _currentValue = _setPoint; 72 | return _currentValue; 73 | } 74 | 75 | float t = static_cast(elapsedTime) / _easyDuration; 76 | _currentValue = (_setPoint - _startPoint) * (*this.*easingFunction)(t) + _startPoint; 77 | return _currentValue; 78 | } 79 | 80 | void Easing::SetMillisInterval(unsigned long interval) 81 | { 82 | _easyDuration = 1000 * interval; 83 | } 84 | 85 | void Easing::SetMicrosInterval(unsigned long interval) 86 | { 87 | _easyDuration = interval; 88 | } 89 | 90 | void Easing::SetMode(ease_mode mode) 91 | { 92 | switch (mode) 93 | { 94 | case LINEAR: easingFunction = (&Easing::linear); break; 95 | case EASE_IN_QUAD: easingFunction = (&Easing::easeInQuad); break; 96 | case EASE_OUT_QUAD: easingFunction = (&Easing::easeOutQuad); break; 97 | case EASE_IN_OUT_QUAD: easingFunction = (&Easing::easeInOutQuad); break; 98 | case EASE_IN_CUBIC: easingFunction = (&Easing::easeInCubic); break; 99 | case EASE_OUT_CUBIC: easingFunction = (&Easing::easeOutCubic); break; 100 | case EASE_IN_OUT_CUBIC: easingFunction = (&Easing::easeInOutCubic); break; 101 | case EASE_IN_QUART: easingFunction = (&Easing::easeInQuart); break; 102 | case EASE_OUT_QUART: easingFunction = (&Easing::easeOutQuart); break; 103 | case EASE_IN_OUT_QUART: easingFunction = (&Easing::easeInOutQuart); break; 104 | case EASE_IN_QUINT: easingFunction = (&Easing::easeInQuint); break; 105 | case EASE_OUT_QUINT: easingFunction = (&Easing::easeOutQuint); break; 106 | case EASE_IN_OUT_QUINT: easingFunction = (&Easing::easeInOutQuint); break; 107 | } 108 | } 109 | 110 | 111 | float Easing::linear(float t) { return t; } 112 | 113 | float Easing::easeInQuad(float t) { return t * t; } 114 | 115 | float Easing::easeOutQuad(float t) { return t * (2 - t); } 116 | 117 | float Easing::easeInOutQuad(float t) { return t < .5 ? 2 * t * t : -1 + (4 - 2 * t) * t; } 118 | 119 | float Easing::easeInCubic(float t) { return t * t * t; } 120 | 121 | float Easing::easeOutCubic(float t) { return (--t) * t * t + 1; } 122 | 123 | float Easing::easeInOutCubic(float t) { return t < .5 ? 4 * t * t * t : (t - 1) * (2 * t - 2) * (2 * t - 2) + 1; } 124 | 125 | float Easing::easeInQuart(float t) { return t * t * t * t; } 126 | 127 | float Easing::easeOutQuart(float t) { return 1 - (--t) * t * t * t; } 128 | 129 | float Easing::easeInOutQuart(float t) { return t < .5 ? 8 * t * t * t * t : 1 - 8 * (--t) * t * t * t; } 130 | 131 | float Easing::easeInQuint(float t) { return t * t * t * t * t; } 132 | 133 | float Easing::easeOutQuint(float t) { return 1 + (--t) * t * t * t * t; } 134 | 135 | float Easing::easeInOutQuint(float t) { return t < .5 ? 16 * t * t * t * t * t : 1 + 16 * (--t) * t * t * t * t; } -------------------------------------------------------------------------------- /src/EasingLib.h: -------------------------------------------------------------------------------- 1 | /*************************************************** 2 | Copyright (c) 2019 Luis Llamas 3 | (www.luisllamas.es) 4 | 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 5 | 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 6 | ****************************************************/ 7 | 8 | #ifndef _EASINGLIB_h 9 | #define _EASINGLIB_h 10 | 11 | #if defined(ARDUINO) && ARDUINO >= 100 12 | #include "Arduino.h" 13 | #else 14 | #include "WProgram.h" 15 | #endif 16 | 17 | enum ease_mode { 18 | LINEAR, 19 | EASE_IN_QUAD, 20 | EASE_OUT_QUAD, 21 | EASE_IN_OUT_QUAD, 22 | EASE_IN_CUBIC, 23 | EASE_OUT_CUBIC, 24 | EASE_IN_OUT_CUBIC, 25 | EASE_IN_QUART, 26 | EASE_OUT_QUART, 27 | EASE_IN_OUT_QUART, 28 | EASE_IN_QUINT, 29 | EASE_OUT_QUINT, 30 | EASE_IN_OUT_QUINT 31 | }; 32 | 33 | class Easing 34 | { 35 | 36 | public: 37 | typedef float (Easing::* EasingFunction)(float); 38 | 39 | Easing(); 40 | Easing(ease_mode mode, unsigned long millisInterval); 41 | 42 | void Init(float value); 43 | 44 | float operator = (float value); 45 | operator float(); 46 | float GetSetpoint(float value); 47 | float SetSetpoint(float value); 48 | float GetValue(); 49 | 50 | void SetMillisInterval(unsigned long interval); 51 | void SetMicrosInterval(unsigned long interval); 52 | void SetMode(ease_mode mode); 53 | 54 | private: 55 | ease_mode Mode; 56 | float _startPoint; 57 | float _setPoint; 58 | float _currentValue; 59 | unsigned long _startTime; 60 | unsigned long _easyDuration = 1000000; 61 | bool _active; 62 | 63 | EasingFunction easingFunction; 64 | float linear(float t); 65 | float easeInQuad(float t); 66 | float easeOutQuad(float t); 67 | float easeInOutQuad(float t); 68 | float easeInCubic(float t); 69 | float easeOutCubic(float t); 70 | float easeInOutCubic(float t); 71 | float easeInQuart(float t); 72 | float easeOutQuart(float t); 73 | float easeInOutQuart(float t); 74 | float easeInQuint(float t); 75 | float easeOutQuint(float t); 76 | float easeInOutQuint(float t); 77 | }; 78 | 79 | #endif 80 | 81 | --------------------------------------------------------------------------------