KBTween/README.md

KBTweenLib

A tween library for Kaboom that allows easy usage of tweens. It also comes with a package for eases, so you can use it with Kaboom's lerp() function if you really wanted.

Dependencies

KBTween.js

• Requires Kaboom v2000 or later
• Requires a JavaScript version that supports ES6 functionality
• Recommends Visual Studio Code
• Recommends VS Code Intellisense for JSDocs

easingpackage.js

• Requires a JavaScript version that supports ES6 functionality
• Can be used with Kaboom, any version

Differences between KBTween.js and JSTween.js

KBTween.js

• Smaller file size, but depends heavily on Kaboom functions
• Perfect for Kaboom games
• Uses onUpdate(), lerp(), and time()

JSTween.js

• Bigger file size, but not dependent on Kaboom at all
• Uses performance.now(), a very precise and lightweight time getter function
• Do not use while making a Kaboom game, it would be pointless! Use for normal JS Canvas games instead.
• Uses Window.requestAnimationFrame()

Documentation

tween() - Creates a tween to animate properties of an object.

• 0 - object: string - The object with the properties being animated.
• 1 - prop[]: string - The properties that will be animated.
• 2 - time: Object - The properties that define how to animate the object.
  • .from: number - The initial value to animate from.
  • .to: number - The new value to animate to.
  • .time?: number - The time it takes to animate the object.
  • .type: number- Defines how the animation works.
• 3 - config?: Object - The properties that define how to style the animation.
  • .ease?: Function - The ease and smoothness of the animation.
  • .onStart?: Function() - What to run when the tween starts.
  • .onUpdate?: onUpdate() - What to run every time the tween updates.
  • .onFinish?: onFinish() - What to run when the tween ends.
• return - : Function() - End the tween manually.
  • 0 - clean?: bool - Whether the tween should end where it is (true) or end at time.to (false).

onFinish - What to run when the tween ends.

• 0 - time: Object - The properties that defined how to animate this object.
• 1 - config: Object - The properties that defined how to style this animation.
• 2 - loops?: number - How many times the tween has looped.

onUpdate - What to run every time the tween updates.

• 0 - frame: number
• 1 - second: number
• 2 - percent: number
• 3 - easePercent: number
• 4 - value: number

tweentypes

• .NORMAL: number
• .FOREVER: number
• .CONTINUE: number
• .PINGPONG: number
• private __NOOP: Function

Example

KBTween.js

import { KBTween } from ".../tween.js";
import { easings } from ".../easingpackage.js";

var k = kaboom(); // Make Kaboom global but also a variable
var twnlib = KBTween(k); // Create new TweenLib instance, pass in Kaboom
                         // This fixes Intellisense on VSCode not picking up on how Kaboom imports plugins
                         // Otherwise, if your IDE is smart enough, you can just pass in the tween lib normally, using KBTween as a plugin
loadBean();

var bean = add([
	sprite("bean"),
	pos(64, 64),
	color(255, 255, 255)
]);

twnlib.tween(bean.pos, [ "x" ], {
	from: 0,
	to: width() - 64,
	time: 3.2,
	type: tweentypes.PINGPONG
});

twnlib.tween(bean.pos, [ "y" ], {
	from: 0,
	to: height() - 64,
	time: 2,
	type: tweentypes.PINGPONG
});

twnlib.tween(bean.color, [ "g", "r" ], {
	from: 255,
	to: 0,
	time: 0.25,
	type: tweentypes.PINGPONG
});

JSTween.js

<p>Points: <span id="number">0</span></p>
<script type="module" src="...js"></script>

import { JSTween } from ".../JSTween.js";
import { easings } from ".../easingpackage.js";

var twnlib = JSTween();

twnlib.tween(document.getElementById("number"), ["innerHTML"], {
	from: 0,
	to: 1000,
	time: 10,
	type: twnlib.tweentypes.NORMAL
})