float px1[], py1[], velx[], vely[];
int part = 1000;
boolean env01=true;
void setup() {
size(800, 400);
background(0);
px1 = new float[part];
py1 = new float[part];
velx = new float[part];
vely = new float[part];
for (int i=0; i<part; i++) {
px1[i] = width/2;
py1[i] = height/2;
velx[i] = random(-1.5, 1.5);
vely[i] = random(-1.5, 1.5);
}
}
void draw() {
pushMatrix();
noStroke();
rectMode(CORNER);
fill(0, 3);
rect(0, 0, width, height);
popMatrix();
stroke(255);
strokeWeight(1.5);
for (int i=0; i<part; i++) {
point(px1[i], py1[i]);
px1[i]+=velx[i];
py1[i]+=vely[i];
if ((py1[i]>height) | (px1[i]>width) | (py1[i]<0) | (px1[i]<0)) {
py1[i] = mouseY;
vely[i] = random(-0.5, 0.5)*noise(10)*10;
px1[i] = mouseX;
velx[i] = random(-0.5, 0.5)*noise(10)*10;
strokeWeight(2.2);
px1[i]+=velx[i]*2;
py1[i]+=vely[i]*2;
}
}
}
