In animation and games, it can be seen that many objects are moving from one point to other linearly. But after using Easing function, the object’s way of progressing can take a different natural and interesting shape.
Easing functions is the rate of change of a parameter over time. It is those kind of equations which moves slowly at the start and speed up, and slow down at the end. These set of equations are taken from Robert Penner’s book and webpage.
The easeInOutQuint() method is used for quintic easing in and out.
Syntax:
easeInOutQuint(t, b, c, d)
Parameters: This method accepts four parameter as mentioned above and described below:
- t: This parameter holds the specified time when animation will start. For example, if value of t is 0, it means animation is just started.
- b: This parameter holds the specified starting position of the object on x-axis. For example, if value of b is 10, it means the starting position of the objects on x-coordinate is 10.
- c: This parameter holds the specified change in value for the object. For example, if value of c is 30, it means, the object has to move 30 to the right, ending at 40.
- d: This parameter holds the specified duration of the whole process. For example, if the value of d is 2, it means, the object has 2 second to perform this motion from 10 to 40.
Return Value: This method returns the eased position of the object i.e., the position of the object at a specific time.
Example 1:
<!DOCTYPE html> <html> <head> <!-- Adding the FabricJS library -->
<script src=
</script>
</head> <body> <script type="text/javascript">
// Initializing easeInOutQuint() function
function easeInOutQuint (t, b, c, d) {
if ((t /= d / 2) < 1) return c / 2 * t * t * t * t * t + b;
return c / 2 * ((t -= 2) * t * t * t * t + 2) + b;
}
// Calling the easeInOutQuint() function over
// the specified parameter values
console.log(fabric.util.ease.easeInOutQuint(1, 2, 3, 4));
</script> </body> </html> |
Output:
2.046875
Example 2:
<!DOCTYPE html> <html> <head> <!-- Adding the FabricJS library -->
<script src=
</script>
</head> <body> <script type="text/javascript">
// Initializing easeInOutQuint() function
function easeInOutQuint (t, b, c, d) {
if ((t /= d / 2) < 1) return c / 2 * t * t * t * t * t + b;
return c / 2 * ((t -= 2) * t * t * t * t + 2) + b;
}
// Initializing the parameters with its values
var t = 5;
var b = 10;
var c = 40;
var d = 12;
// Calling the easeInOutQuint() function over
// the specified parameter values
console.log(fabric.util.ease.easeInOutQuint(t, b, c, d));
</script> </body> </html> |
Output:
18.03755144032922