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# Questions tagged [easing]

Easing functions specify the rate of change of a parameter over time.

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### Smooth rotation to target with separate yaw, pitch and roll smooth times

I'm trying to write a camera script in Unity that would smoothly rotate the camera over time towards the desired rotation, with separate input parameters for yaw, pitch and roll smoothing, and I can't ...
41 views

### How can I ease in and out of a Lerp motion over a set duration?

Here is the code I am using: ...
• 13
1 vote
167 views

### How to use SmoothDamp with speed?

I have a moving platform which is being moved like this: ...
51 views

### Raise/Lower Object Height Based on Distance, with Easing

I'm trying to make an indicator object appear higher up in the sky the farther away a player is, up to a certain distance. Basically, if the player is < 5 distance away, the object's height should ...
• 123
1 vote
128 views

### How to ease toward a rotation limit, instead of stopping abruptly?

I rotate my camera using a framerate-independent exponential ease-out blend like so: ...
• 821
249 views

### How should I design an easing class in C++?

I'm currently struggling to find a good approach for an easing class for my game. The class holds some easing effects, like elastic-in-out, and should be called by menu buttons, players and enemies ...
• 101
143 views

### Easing towards stepped value

I'm currently developing this rhythm game in lua (on top of a c++ engine) and I'm having trouble keeping a steady playhead position for the song currently playing. The playhead position that the ...
• 43
3k views

### Interpolation using cubic Bezier curves

I am trying to create an interpolate function for an animation library to achieve a tweening effect between frames. I want this to work with Bezier curves. I have created a jsFiddle (here) of my ...
• 231
1 vote
72 views

### How can I make this easing function less jumpy? [closed]

I have this function that acts as an ease-in: protected static function easeIn(ratio:Number):Number { return ratio * ratio * ratio; } Ratio is a value ...
• 527
1 vote
120 views

### Looking for an easing equation

I am looking for an easing equation with the following properties: It starts at a velocity of zero, and eases into a constant velocity of 1 for a duration of t_1 ...
• 3,567
1 vote
71 views

### How to convert strict limit in position into gradual slow down?

The player moves a spell object, the spell must stay withing a certain range of the player. The spell is moved using a physics system and it has mass and velocity. Currently when the spell goes out ...
• 121
5k views

### What are easing functions?

I found this cool website for game development and it has a list of easing functions: Although the site contains a description of what they're for, it goes over my head. What are easing functions ...
• 3,098
8k views

### How do I lerp between values that loop (such as hue or rotation)?

View Demo I'm trying to make the joint rotate smoothly around the center of the canvas, toward the angle of mouse pointer. What I have works, but I want it to animate the shortest distance possible ...
• 405
802 views

### Cubic bezier for easing?

I would like to find out what Y is if X is a certain number from a cubic bezier curve to make a custom easing function, like it's done on this site: http://cubic-bezier.com/ Does anyone know a formula ...
1 vote
164 views

### Multiple concurrent Tweens

I'd like to be able to direct a game object to move to a new target position over a certain amount of time. There are lots of different easing functions available, but for now let's say I'm just ...
• 475
1 vote
355 views

### Easing equations with moving end points

Usually easing equations have 4 parameters: time duration begin point end point For example: ...
• 2,104
429 views

### Tweening in 2d side-scrolling RPG

I'm working on a 2d side-scrolling RPG-ish game. Currently the movement of the main character(hero) is based on the A and D keys, because it's 2d and I don't really care about jumping. I would like to ...
• 43
2k views

### How do I simulate a swinging pendulum?

I want to simulate a rope with a weight attached, swinging back and forth like a pendulum. Any actual physics is overkill; it's just endlessly repeating the same motion. JQuery has a the "swing" ease ...
• 247
653 views

### Animating a background 'pulse' with easing equation

I'm trying to find a suitable easing equation (or other method) to animate an object so that it 'pulses' (imagine a 'spike' on a music visualiser, or see the image I drew badly below) 'v' is the ...
• 549
1k views

### Stop a rotating object at a specified angle?

I'm working in JavaScript with HTML5 and the canvas. I have an object which is rotating at a certain speed, and I need the object's rotation to slow down gradually and the front of the object to stop ...
• 123
2k views

### Problems using easing equations in C# XNA

I'm having some trouble using the easing equations suggested by Robert Penner for ActionScript (http://www.robertpenner.com/easing/, and a Flash demo here) in my C# XNA game. Firstly, what is the ...
• 549