inheritance

w9_cars/sketch.js

@@ -0,0 +1,43 @@
+const vehicles = [];
+const IMG_SIZE = 400;
+let message = '';
+
+const images = {};
+
+function setup() {
+  createCanvas(4 * IMG_SIZE, 300);
+
+  vehicles.push(new Car(4));
+}
+
+function draw() {
+  background(255);
+
+  for (let i = 0; i < vehicles.length; i += 1) {
+    vehicles[i].draw(i * IMG_SIZE, 0, IMG_SIZE);
+  }
+
+  fill(0);
+  textFont('Arial', 20);
+  textAlign(CENTER);
+  text(message, width / 2, IMG_SIZE);
+}
+
+function mousePressed() {
+  const index = floor(mouseX / IMG_SIZE);
+  message = vehicles[index]?.getDescription() ?? 'None'; // polymorphism!
+}
+
+// CLASSES
+
+class Car {
+  constructor(passengers) {
+    // ...
+  }
+
+  getDescription() {
+    // PLACEHOLDER
+  }
+
+  draw() {}
+}