Merge pull request #366 from nature-of-code/notion-update-docs

[Notion] Update docs

content/02_forces.html

@@ -178,7 +178,7 @@ <h3 id="units-of-measurement">Units of Measurement</h3>
   <h3 id="exercise-22">Exercise 2.2</h3>
   <p>There’s another way you could write the <code>applyForce()</code> function, using the static method <code>div()</code> instead of <code>copy()</code>. Rewrite <code>applyForce()</code> using the static method. For help with this exercise, review static methods in <a href="/vectors#static-vs-non-static-methods">Chapter 1</a>.</p>
   <pre class="codesplit" data-code-language="javascript">applyForce(force) {
-  let f = _______._______(_______,_______);
+  let f = <span class="blank">p5.Vector.div</span>(<span class="blank">force</span>, <span class="blank">this.mass</span>);
   this.acceleration.add(f);
 }</pre>
 </div>

content/03_oscillation.html

@@ -817,7 +817,7 @@ <h3 id="example-310-swinging-pendulum">Example 3.10: Swinging Pendulum</h3>
 
   update() {
     let gravity = 0.4;
-    //{!1 .code-wide} Formulafor angular acceleration
+    //{!1} Formula for angular acceleration
     this.angleAcceleration = (-1 * gravity / this.r) * sin(this.angle);
 
     //{!2} Standard angular motion algorithm
@@ -838,7 +838,7 @@ <h3 id="example-310-swinging-pendulum">Example 3.10: Swinging Pendulum</h3>
     //{!1 .code-wide} The arm
     line(this.pivot.x, this.pivot.y, this.bob.x, this.bob.y);
     fill(127);
-    //{!1 .code-wide} The bob
+    //{!1} The bob
     circle(this.bob.x, this.bob.y, this.ballr * 2);
   }
 }</pre>

content/examples/01_vectors/example_1_8_motion_101_velocity_and_constant_acceleration/sketch.js

@@ -3,16 +3,29 @@
 // http://natureofcode.com
 
 let mover;
+let counter=0;
 
 function setup() {
   createCanvas(640, 240);
   mover = new Mover();
 }
 
 function draw() {
-  background(255);
-
   mover.update();
   mover.checkEdges();
+
+  counter++;
+  if(counter%3===0){
+    drawGraphic()
+  }
+}
+
+function drawGraphic(){
+  background(255,30);
   mover.show();
+
+}
+
+function mousePressed(){
+  save('screenshot.png')
 }