Easing Tweening GMS

Extremely easy to use!

Just import the script into GameMaker Studio as a tabbed script and use the functions as follows:

EaseFunctionName (current time, duration, start value, change in value, [absolute = false])

• EaseFunctionName: Just chose one of the 30 available easing functions, such as EaseInQuad, EaseOutBack, etc...
• Current time: Variable that increases each frame (counter). Must be less or equal to the duration for the effect to be correct.
• Duration: Duration of the easing effect
• Start value: Initial value to be eased
• Change in value: When absolute if false (default), it is the value to be added to the start value. When absolute is true, it is the absolute value you will be easing towards.
• [Absolute]: Optional boolean argument

For the current time and duration, you can use a variable that increases each frame and the loops back to zero. Below an example which moves the object X position:

Create code:

duration = 30;
time = 0;

Step code:

x = EaseInOutBack(time, duration, 0, 400);
time++;
if (time<duration) {
    time = 0;
}

Example of all functions can be seen on the screenshots!

This script was created based on DaveTech work, which in turn was based on Robert Penner's Easing Functions.