Repulsion Issue
in
Programming Questions
•
2 years ago
I can't seem to get repulsion to work in my code. I have bubbles that bounce around and I just want them to move away when the mouse pointer gets close to them. Any help would be much appreciated, thanks
!
int numBalls = 12;
float spring = 0.05;
float friction = -0.9;
Ball[] balls = new Ball[numBalls];
void setup()
{
size(600, 600);
noStroke();
smooth();
for (int i = 0; i < numBalls; i++) {
balls[i] = new Ball(random(width), random(height), random(20, 40), i, balls);
}
}
void draw()
{
background(0,0,150);
for (int i = 0; i < numBalls; i++) {
balls[i].collide();
balls[i].move();
balls[i].display();
}
}
class Ball {
float x, y;
float diameter;
float vx = 0;
float vy = 0;
int id;
Ball[] others;
Ball(float xin, float yin, float din, int idin, Ball[] oin) {
x = xin;
y = yin;
diameter = din;
id = idin;
others = oin;
}
void collide() {
for (int i = id + 1; i < numBalls; i++) {
float dx = others[i].x - x;
float dy = others[i].y - y;
float distance = sqrt(dx*dx + dy*dy);
float minDist = others[i].diameter/2 + diameter/2;
if (distance < minDist) {
float angle = atan2(dy, dx);
float targetX = x + cos(angle) * minDist;
float targetY = y + sin(angle) * minDist;
float ax = (targetX - others[i].x) * spring;
float ay = (targetY - others[i].y) * spring;
vx -= ax;
vy -= ay;
others[i].vx += ax;
others[i].vy += ay;
}
}
}
void move() {
x += vx;
y += vy;
if (x + diameter/2 > width) {
x = width - diameter/2;
vx *= friction;
}
else if (x - diameter/2 < 0) {
x = diameter/2;
vx *= friction;
}
if (y + diameter/2 > height) {
y = height - diameter/2;
vy *= friction;
}
else if (y - diameter/2 < 0) {
y = diameter/2;
vy *= friction;
}
float vx = mouseX - x;
float vy = mouseY - y;
stroke(255,0,0);
float distance = dist(x,y,mouseX,mouseY);
vx = (vx / distance) * 100;
vy = (vy / distance) * 100;
line(x,y,x+vx,y+vy);
}
void display() {
fill(255, 204);
ellipse(x, y, diameter, diameter);
}
}
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