Brownian
/**
* Brownian motion.
*
* Recording random movement as a continuous line.
*/
const int num = 2000;
int range = 6;
float ax[num] = {0};
float ay[num] = {0};
void setup()
{
size(640, 360);
for (int i = 0; i < num; i++) {
ax[i] = width/2;
ay[i] = height/2;
}
frameRate(30);
}
void draw()
{
background(51);
// Shift all elements 1 place to the left
for (int 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 (int i = 1; i < num; i++) {
float val = float(i)/num * 204.0 + 51;
stroke(val);
line(ax[i-1], ay[i-1], ax[i], ay[i]);
}
}