I want to confine the particles and emergent lines (in the code) to a specific space like an annular ring between two concentric circles. Now, the particles and lines are all over the canvas. How do I go about that?
//import com.hamoid.*;
// create a new VideoExport-object
//VideoExport videoExport;
int nParticles = 200;
int particleSize = 200;
int maxCounter = 150;
Particle[] particles;
//ArrayList<ArrayList<PVector>> lines;
ArrayList<emergentLines> lines;
void setup() {
background(255);
size(2000, 2000);
stroke(0, 80);
fill(0,90);
particles = new Particle[nParticles];
for (int i = 0; i < nParticles; ++i) {
particles[i] = new Particle();
}
background(0);
/*videoExport = new VideoExport(this);
videoExport.setFrameRate(5);
videoExport.startMovie();*/
}
void draw() {
checkCollisions();
for (Particle p : particles) {
p.update();
//print(p.)
//ellipse(p.pos.x, p.pos.y, 40, 40);
}
for (emergentLines l : lines) {
stroke(l.mapColor(),5);
l.drawLine();
}
//videoExport.saveFrame();
}
void checkCollisions(){
lines = new ArrayList<emergentLines>();
//lines = new ArrayList<ArrayList<PVector>>();
for (Particle p1 : particles) {
for (Particle p2 : particles) {
if (p1 != p2) {
float distance = PVector.dist(p1.pos, p2.pos);
if (distance < particleSize) {
if (p1.counter == 0) {
p1.dir.rotate(radians(random(0,90)));
p1.counter = maxCounter;
}
if (p2.counter == 0) {
p2.dir.rotate(radians(random(0,90)));
p2.counter = maxCounter;
}
emergentLines line = new emergentLines(p1.pos, p2.pos, distance);
lines.add(line);
}
}
}
}
}
class emergentLines{
PVector pt1, pt2;
float distance;
emergentLines(PVector point1, PVector point2, float dist){
pt1 = point1;
pt2 = point2;
distance = dist;
}
void drawLine() {
line(pt1.x, pt1.y, pt2.x, pt2.y);
}
color mapColor() {
int greenColor = int(map(distance, 0, particleSize, 55, 65));
color lineCOlor = color(0, greenColor, 255);
//color lineCOlor = int(map(distance, 0, particleSize, 0, 255));
return lineCOlor;
}
}
class Particle{
float x = random(width);
float y = random(height);
int counter = 0;
PVector pos = new PVector(x, y);
PVector dir = new PVector(random(-5,5), random(-5,5));
void update(){
pos.add(dir);
if (pos.x > width || pos.x < 0) {
pos.x = width/2;
}
if (pos.y > height || pos.y < 0) {
pos.y = height/2;
}
if (counter > 0) {
counter -= 1;
}
}
}
/*
void keyPressed() {
if (key == 'q') {
videoExport.endMovie();
exit();
}
}*/
