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Notion - Update docs
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3 changed files with 30 additions and 21 deletions
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@ -195,8 +195,8 @@ function setup() {
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engine = Engine.create();
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}</pre>
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<p>Notice how the very first line of code creates a variable called <code>Engine</code> and sets it equal to <code>Matter.Engine</code>. Here, I am deciding to point the single keyword <code>Engine</code> to the <code>Engine</code> class namespaced inside matter.js. I am making this decision because I know that I will not be using the word <code>Engine</code> for any other variables (nor does it conflict with something in p5.js) and want to be able to keep my code less verbose. I’ll be doing this with <code>Vector</code>, <code>Bodies</code>, <code>Composite</code>, and more as I continue to build the examples. (But while the linked source code will always include all the alias’s, I won’t always include them in the book text itself.)</p>
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<p><span class="highlight"><strong>Object Destructuring
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</strong>Object destructuring in JavaScript is a technique to extract properties from an object and assign them to variables. In the case of matter.js, the <code>Matter</code>object contains the <code>Engine</code> property. An alias can be set with <code>let Engine = Matter.Engine</code>, however, by with destructuring, the <code>Engine</code>can be accessed more concisely: <code>let { Engine } = Matter</code>. In the examples in this chapter, I will create multiple aliases with this methodology.</span>
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<p><span class="highlight"><strong>Object Destructuring</strong></span>
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<p><strong></strong>Object destructuring in JavaScript is a technique to extract properties from an object and assign them to variables. In the case of matter.js, the <code>Matter</code>object contains the <code>Engine</code> property. An alias can be set with <code>let Engine = Matter.Engine</code>, however, by with destructuring, the <code>Engine</code>can be accessed more concisely: <code>let { Engine } = Matter</code>. In the examples in this chapter, I will create multiple aliases with this methodology.</p>
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<pre class="codesplit" data-code-language="javascript">// Using Object Destructuring to extract aliases for Engine and Vector
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let { Engine, Vector } = Matter;</pre>
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</p>
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@ -1108,28 +1108,40 @@ location.add(velocity);</pre>
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</thead>
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<tbody>
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<tr>
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<td><code>let a = createVector(1, -1);
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<td>
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<pre class="codesplit" data-code-language="javascript">let a = createVector(1, -1);
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let b = createVector(3, 4);
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a.add(b);</code></td>
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<td><code>let a = new Vec2D(1, -1);
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a.add(b);</pre>
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</td>
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<td>
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<pre class="codesplit" data-code-language="javascript">let a = new Vec2D(1, -1);
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let b = new Vec2D(3, 4);
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a.addSelf(b);</code></td>
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a.addSelf(b);</pre>
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</td>
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</tr>
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<tr>
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<td><code>let a = createVector(1, -1);
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<td>
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<pre class="codesplit" data-code-language="javascript">let a = createVector(1, -1);
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let b = createVector(3, 4);
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let c = p5.Vector.add(a, b);</code></td>
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<td><code>let a = new Vec2D(1, -1);
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let c = p5.Vector.add(a, b);</pre>
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</td>
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<td>
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<pre class="codesplit" data-code-language="javascript">let a = new Vec2D(1, -1);
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let b = new Vec2D(3, 4);
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let c = a.add(b);</code></td>
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let c = a.add(b);</pre>
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</td>
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</tr>
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<tr>
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<td><code>let a = createVector(1, -1);
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<td>
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<pre class="codesplit" data-code-language="javascript">let a = createVector(1, -1);
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let m = a.mag();
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a.normalize();</code></td>
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<td><code>let a = new Vec2D(1, -1);
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a.normalize();</pre>
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</td>
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<td>
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<pre class="codesplit" data-code-language="javascript">let a = new Vec2D(1, -1);
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let m = a.magnitude();
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a.normalize();</code></td>
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a.normalize();</pre>
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</td>
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</tr>
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</tbody>
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</table>
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@ -1559,8 +1571,4 @@ let behavior = new AttractionBehavior(particle, distance, strength);</pre>
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<li>Use spring (or joint) connections between objects to control their interactions. Create and delete these springs on the fly. Consider making these connections visible or invisible to the viewer.</li>
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</ul>
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</div>
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<figure>
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<img src="images/06_libraries/06_libraries_19.png" alt="">
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<figcaption></figcaption>
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</figure>
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</section>
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html, body {
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margin: 0;
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padding: 0;
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html,
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body {
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margin: 0;
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padding: 0;
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}
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canvas {
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display: block;
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