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Notion - Update docs

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shiffman 2024-02-24 18:23:20 +00:00 committed by GitHub
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commit 92478700d6
1 changed files with 2 additions and 7 deletions
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content/03_oscillation.html
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@ -789,10 +789,8 @@ function setup() {
function draw() {
let gravity = createVector(0, 1);
bob.applyForce(gravity);
// This new method in the <code>Spring</code> class will take care of computing the force of the spring on the bob.
//{!1} This new method in the <code>Spring</code> class will take care of computing the force of the spring on the bob.
<strong>spring.connect(bob);</strong>
bob.update();
bob.show();
spring.show();
@ -807,8 +805,7 @@ function draw() {
<pre class="codesplit" data-code-language="javascript"> spring.connect(bob);</pre>
<p>What gives? Why don’t I need to call <code>applyForce()</code> on the bob? The answer, of course, is that I <em>do</em> need to call <code>applyForce()</code> on the bob. It’s just that instead of doing it in <code>draw()</code>, I’m demonstrating that a perfectly reasonable (and sometimes preferable) alternative is to ask the <code>connect()</code> method to call <code>applyForce()</code> on the bob internally:</p>
<pre class="codesplit" data-code-language="javascript"> connect(bob) {
let force = some fancy calculations
let force = <em>some fancy calculations</em>
// The <code>connect()</code> method takes care of calling <code>applyForce()</code> and therefore doesn’t have to return a vector to the calling area.
bob.applyForce(force);
}</pre>
@ -839,10 +836,8 @@ function draw() {
// Calculate the displacement between distance and rest length. I’ll use the variable name <code>stretch</code> instead of <code>x</code> to be more descriptive.
<strong>let currentLength = force.mag();
let stretch = currentLength - this.restLength;</strong>
// Direction and magnitude together!
<strong>force.setMag(-1 * this.k * stretch);</strong>
// Call <code>applyForce()</code> right here!
bob.applyForce(force);
}