kontra
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Kontra HTML5 game development library
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<title>Kontra.js – Vector</title>
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<li><a href="." >Introduction</a></li>
<li><a href="getting-started" >Getting Started</a></li>
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<li><a href="made-with-kontra" >Made With Kontra</a></li>
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<span id="api" class="nav-api-heading">API</span>
<ul aria-labelledby="api">
<li><a href="api/animation" >Animation</a></li>
<li><a href="api/assets" >Assets</a></li>
<li><a href="api/core" >Core</a></li>
<li><a href="api/events" >Events</a></li>
<li><a href="api/gameLoop" >GameLoop</a></li>
<li><a href="api/keyboard" >Keyboard</a></li>
<li><a href="api/plugin" >Plugin</a></li>
<li><a href="api/pointer" >Pointer</a></li>
<li><a href="api/pool" >Pool</a></li>
<li><a href="api/quadtree" >Quadtree</a></li>
<li><a href="api/sprite" >Sprite</a></li>
<li><a href="api/spriteSheet" >SpriteSheet</a></li>
<li><a href="api/store" >Store</a></li>
<li><a href="api/tileEngine" >TileEngine</a></li>
<li><a href="api/vector" aria-current="page">Vector</a></li>
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<a href="https://github.com/straker/kontra" class="github-corner" aria-label="View source on GitHub"><svg width="80" height="80" viewBox="0 0 250 250" style="fill:#151513; color:#fff; position: absolute; top: 0; border: 0; right: 0;" aria-hidden="true"><path d="M0,0 L115,115 L130,115 L142,142 L250,250 L250,0 Z"></path><path d="M128.3,109.0 C113.8,99.7 119.0,89.6 119.0,89.6 C122.0,82.7 120.5,78.6 120.5,78.6 C119.2,72.0 123.4,76.3 123.4,76.3 C127.3,80.9 125.5,87.3 125.5,87.3 C122.9,97.6 130.6,101.9 134.4,103.2" fill="currentColor" style="transform-origin: 130px 106px;" class="octo-arm"></path><path d="M115.0,115.0 C114.9,115.1 118.7,116.5 119.8,115.4 L133.7,101.6 C136.9,99.2 139.9,98.4 142.2,98.6 C133.8,88.0 127.5,74.4 143.8,58.0 C148.5,53.4 154.0,51.2 159.7,51.0 C160.3,49.4 163.2,43.6 171.4,40.1 C171.4,40.1 176.1,42.5 178.8,56.2 C183.1,58.6 187.2,61.8 190.9,65.4 C194.5,69.0 197.7,73.2 200.1,77.6 C213.8,80.2 216.3,84.9 216.3,84.9 C212.7,93.1 206.9,96.0 205.4,96.6 C205.1,102.4 203.0,107.8 198.3,112.5 C181.9,128.9 168.3,122.5 157.7,114.1 C157.9,116.9 156.7,120.9 152.7,124.9 L141.0,136.5 C139.8,137.7 141.6,141.9 141.8,141.8 Z" fill="currentColor" class="octo-body"></path></svg></a>
<h1>Vector(​[x][, y])
</h1>
<p>A simple 2d vector object.</p>
<div class="tablist">
<ul role="tablist">
<li role="presentation" data-tab="global">
<button role="tab" id="vector-global-tab">Global Object</button>
</li>
<li role="presentation" data-tab="es">
<button role="tab" id="vector-es-tab">ES Module Import</button>
</li>
<li role="presentation" data-tab="bundle">
<button role="tab" id="vector-bundle-tab">Module Bundler</button>
</li>
<li role="presentation"></li>
</ul>
<section role="tabpanel" aria-labelledby=vector-global-tab data-tabpanel="global"><pre><code class="language-js">let { Vector } = kontra;
let vector = Vector(100, 200);</code></pre></section>
<section role="tabpanel" aria-labelledby=vector-es-tab data-tabpanel="es"><pre><code class="language-js">import { Vector } from 'path/to/kontra.mjs';
let vector = Vector(100, 200);</code></pre></section>
<section role="tabpanel" aria-labelledby=vector-bundle-tab data-tabpanel="bundle"><pre><code class="language-js">import { Vector } from 'kontra';
let vector = Vector(100, 200);</code></pre></section>
</div>
<h3 id="title-Vector"><span class="visually-hidden">Vector</span> Parameters</span></h3>
<dl aria-labelledby="title-Vector">
<dt>
<code>x</code>
<span class="optional">Optional</span>
</dt>
<dd><p>Number. X coordinate of the vector. Defaults to <code>0</code>.</p>
</dd>
<dt>
<code>y</code>
<span class="optional">Optional</span>
</dt>
<dd><p>Number. Y coordinate of the vector. Defaults to <code>0</code>.</p>
</dd>
</dl>
<section class="toc">
<h2 id="toc"><a href="#toc" class="section-link">Table of Contents<span aria-hidden="true">#</span></a></h2>
<ul aria-labelledby="toc">
<li>
<h3 id="properties">Properties</h3>
<ul aria-labelledby="properties">
<li>
<a href="api/vector#x">
<span>Vector​.x</span>
</a>
</li>
<li>
<a href="api/vector#y">
<span>Vector​.y</span>
</a>
</li>
</ul>
</li>
<li>
<h3 id="methods">Methods</h3>
<ul aria-labelledby="methods">
<li>
<a href="api/vector#add">
<span>Vector​.add(​vector[, dt])</span>
</a>
</li>
<li>
<a href="api/vector#clamp">
<span>Vector​.clamp(​xMin, yMin, xMax, yMax)</span>
</a>
</li>
</ul>
</li>
</ul>
</section>
<section>
<h2 id="add">
<a href="api/vector#add" class="section-link">
<span>Vector​.add(​vector[, dt])</span>
<span aria-hidden="true">#</span>
</a>
</h2>
<p>Return a new Vector whose value is the addition of the current Vector and the passed in Vector. If <code>dt</code> is provided, the result is multiplied by the value.</p>
<h3 id="title-add"><span class="visually-hidden">add</span> Parameters</span></h3>
<dl aria-labelledby="title-add">
<dt>
<code>vector</code>
</dt>
<dd><p><a href="Vector">Vector</a>. Vector to add to the current Vector.</p>
</dd>
<dt>
<code>dt</code>
<span class="optional">Optional</span>
</dt>
<dd><p>Number. Time since last update. Defaults to <code>1</code>.</p>
</dd>
</dl>
<h3><span class="visually-hidden">add</span> Return value</h3>
<p><p>A new <a href="Vector">Vector</a> instance.</p>
</p>
</section>
<section>
<h2 id="clamp">
<a href="api/vector#clamp" class="section-link">
<span>Vector​.clamp(​xMin, yMin, xMax, yMax)</span>
<span aria-hidden="true">#</span>
</a>
</h2>
<p>Clamp the Vector between two points, preventing <code>x</code> and <code>y</code> from going below or above the minimum and maximum values. Perfect for keeping a sprite from going outside the game boundaries.</p>
<div class="tablist">
<ul role="tablist">
<li role="presentation" data-tab="global">
<button role="tab" id="clamp-global-tab">Global Object</button>
</li>
<li role="presentation" data-tab="es">
<button role="tab" id="clamp-es-tab">ES Module Import</button>
</li>
<li role="presentation" data-tab="bundle">
<button role="tab" id="clamp-bundle-tab">Module Bundler</button>
</li>
<li role="presentation"></li>
</ul>
<section role="tabpanel" aria-labelledby=clamp-global-tab data-tabpanel="global"><pre><code class="language-js">let { Vector } = kontra;
let vector = Vector(100, 200);
vector.clamp(0, 0, 200, 300);
vector.x += 200;
console.log(vector.x); //=> 200
vector.y -= 300;
console.log(vector.y); //=> 0
vector.add({x: -500, y: 500});
console.log(vector); //=> {x: 0, y: 300}</code></pre></section>
<section role="tabpanel" aria-labelledby=clamp-es-tab data-tabpanel="es"><pre><code class="language-js">import { Vector } from 'path/to/kontra.mjs';
let vector = Vector(100, 200);
vector.clamp(0, 0, 200, 300);
vector.x += 200;
console.log(vector.x); //=> 200
vector.y -= 300;
console.log(vector.y); //=> 0
vector.add({x: -500, y: 500});
console.log(vector); //=> {x: 0, y: 300}</code></pre></section>
<section role="tabpanel" aria-labelledby=clamp-bundle-tab data-tabpanel="bundle"><pre><code class="language-js">import { Vector } from 'kontra';
let vector = Vector(100, 200);
vector.clamp(0, 0, 200, 300);
vector.x += 200;
console.log(vector.x); //=> 200
vector.y -= 300;
console.log(vector.y); //=> 0
vector.add({x: -500, y: 500});
console.log(vector); //=> {x: 0, y: 300}</code></pre></section>
</div>
<h3 id="title-clamp"><span class="visually-hidden">clamp</span> Parameters</span></h3>
<dl aria-labelledby="title-clamp">
<dt>
<code>xMin</code>
</dt>
<dd><p>Number. Minimum x value.</p>
</dd>
<dt>
<code>yMin</code>
</dt>
<dd><p>Number. Minimum y value.</p>
</dd>
<dt>
<code>xMax</code>
</dt>
<dd><p>Number. Maximum x value.</p>
</dd>
<dt>
<code>yMax</code>
</dt>
<dd><p>Number. Maximum y value.</p>
</dd>
</dl>
</section>
<section>
<h2 id="x">
<a href="api/vector#x" class="section-link">
<span>Vector​.x</span>
<span aria-hidden="true">#</span>
</a>
</h2>
<p>X coordinate of the vector.</p>
</section>
<section>
<h2 id="y">
<a href="api/vector#y" class="section-link">
<span>Vector​.y</span>
<span aria-hidden="true">#</span>
</a>
</h2>
<p>Y coordinate of the vector.</p>
</section>
</div>
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