Files
havox/projects/fourier_series.html
2026-03-10 21:01:46 +00:00

77 lines
1.6 KiB
HTML
Executable File

<DOCTYPE! html>
<html>
<script src="https://cdn.jsdelivr.net/npm/p5@1.4.0/lib/p5.min.js"></script>
<script>
class dot{
constructor(x, y){
this.x = x;
this.y = y;
}
}
class circle{
constructor(cx, cy, r, a){
this.cx = cx;
this.cy = cy;
this.r = r;
this.a = a;
}
}
let time = 0;
let wave = [];
let slider;
function setup() {
createCanvas(900, 800);
slider = createSlider(1, 50, 5);
}
function draw() {
background(41);
translate(250, height/2);
let x = 0;
let y = 0;
for (let i = 0; i < slider.value(); i++) {
let prevx = x;
let prevy = y;
let n = i * 2 + 1;
let radius = 100 * (4 / (n * PI));
x += radius * cos(n * time);
y += radius * sin(n * time);
stroke(255, 100);
noFill();
ellipse(prevx, prevy, radius * 2);
//fill(255);
stroke(255);
line(prevx, prevy, x, y);
//ellipse(x, y, 8);
}
wave.unshift(y);
translate(200, 0);
line(x - 200, y, 0, wave[0]);
beginShape();
noFill();
for (let i = 0; i < wave.length; i++) {
vertex(i, wave[i]);
}
endShape();
time += 0.02;
if (wave.length > 450) {
wave.pop();
}
}
</script>
</html>