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15
1. Vectors/5. Car Simulation/index.html
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<html>
<head>
<script src="https://cdn.jsdelivr.net/npm/p5@1.9.0/lib/p5.js"></script>
<script src="sketch.js"></script>
<style>
body {
background: #212121;
}
</style>
</head>
<body>
<main>
</main>
</body>
</html>

42
1. Vectors/5. Car Simulation/sketch.js
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let position
let velocity
let accelaration
function setup() {
createCanvas(600, 300)
position = createVector(width/2, height/2)
velocity = createVector(0, 0)
accelaration = createVector(0, 0)
}
function draw() {
let keyCodeW = 87
let keyCodeS = 83
accelaration.x = 0
if (keyIsDown(keyCodeW)) {
accelaration.x += 0.001
}
if (keyIsDown(keyCodeS)) {
accelaration.x -= 0.001
}
velocity.add(p5.Vector.mult(accelaration, deltaTime))
velocity.limit(2)
if (position.x < 0) {
velocity.x = 0
position.x = 0
}
if (position.x > width) {
velocity.x = 0
position.x = width
}
position.add(p5.Vector.mult(velocity, deltaTime))
background(255)
circle(position.x, position.y, 10)
}

15
1. Vectors/6. Random Walker/index.html
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<html>
<head>
<script src="https://cdn.jsdelivr.net/npm/p5@1.9.0/lib/p5.js"></script>
<script src="sketch.js"></script>
<style>
body {
background: #212121;
}
</style>
</head>
<body>
<main>
</main>
</body>
</html>

62
1. Vectors/6. Random Walker/sketch.js
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class Walker {
constructor(x = 0, y = 0) {
this.t = createVector(0, 10000)
this.position = createVector(x, y)
this.velocity = createVector(0, 0)
this.accelaration = createVector(0, 0)
this.topSpeed = 50
}
step() {
this.accelaration = createVector(
map(noise(this.t.x), 0, 1, -1, 1),
map(noise(this.t.y), 0, 1, -1, 1)
).normalize()
this.accelaration.mult(50)
const dt = deltaTime/1000
this.velocity.add(p5.Vector.mult(this.accelaration, dt))
this.velocity.limit(this.topSpeed)
this.position.add(p5.Vector.mult(this.velocity, dt))
this.t.add(createVector(dt, dt))
if (this.position.x < 0) {
this.position.x += width
}
if (this.position.x > width) {
this.position.x -= width
}
if (this.position.y < 0) {
this.position.y += height
}
if (this.position.y > height) {
this.position.y -= height
}
}
draw() {
stroke(0)
line(
this.position.x, this.position.y,
this.position.x + this.accelaration.x,
this.position.y + this.accelaration.y
)
circle(this.position.x, this.position.y, 20)
}
}
let walker
function setup() {
createCanvas(640, 240)
background(255)
walker = new Walker(width/2, height/2)
}
function draw() {
background(255)
walker.step()
walker.draw()
}

15
1. Vectors/8. Mouse Attractor/index.html
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<html>
<head>
<script src="https://cdn.jsdelivr.net/npm/p5@1.9.0/lib/p5.js"></script>
<script src="sketch.js"></script>
<style>
body {
background: #212121;
}
</style>
</head>
<body>
<main>
</main>
</body>
</html>

52
1. Vectors/8. Mouse Attractor/sketch.js
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class Walker {
constructor(x = 0, y = 0) {
this.position = createVector(x, y)
this.velocity = createVector(0, 0)
this.accelaration = createVector(0, 0)
}
step() {
let target = createVector(mouseX, mouseY)
let difference = p5.Vector.sub(target, this.position)
this.accelaration = difference.copy()
this.accelaration.setMag(1000/difference.mag())
const dt = deltaTime/1000
this.velocity.add(p5.Vector.mult(this.accelaration, dt))
this.position.add(p5.Vector.mult(this.velocity, dt))
if (this.position.x < 0) {
this.position.x += width
}
if (this.position.x > width) {
this.position.x -= width
}
if (this.position.y < 0) {
this.position.y += height
}
if (this.position.y > height) {
this.position.y -= height
}
}
draw() {
stroke(0)
circle(this.position.x, this.position.y, 20)
}
}
let walker
function setup() {
createCanvas(640, 240)
background(255)
walker = new Walker(width/2, height/2)
}
function draw() {
background(255)
walker.step()
walker.draw()
}

6
README.md
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@ -1,9 +1,3 @@
# Nature Of Code # Nature Of Code
Book: https://natureofcode.com/ Book: https://natureofcode.com/
## TODO
Create a zig web server to act as a table of contents for all of the exercises that have been done.
And so that `index.html` would not need to be copy pasted.