Brownian Motion
Recording random movement as a continuous line. Port of original example from the Processing examples page.
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let num = 2000;
let range = 6;
let ax = [];
let ay = [];
function setup() {
createCanvas(710, 400);
for ( let i = 0; i < num; i++ ) {
ax[i] = width / 2;
ay[i] = height / 2;
}
frameRate(30);
}
function draw() {
background(51);
// Shift all elements 1 place to the left
for ( let i = 1; i < num; i++ ) {
ax[i - 1] = ax[i];
ay[i - 1] = ay[i];
}
// Put a new value at the end of the array
ax[num - 1] += random(-range, range);
ay[num - 1] += random(-range, range);
// Constrain all points to the screen
ax[num - 1] = constrain(ax[num - 1], 0, width);
ay[num - 1] = constrain(ay[num - 1], 0, height);
// Draw a line connecting the points
for ( let j = 1; j < num; j++ ) {
let val = j / num * 204.0 + 51;
stroke(val);
line(ax[j - 1], ay[j - 1], ax[j], ay[j]);
}
}
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