Processingは楽しいな
キレイな色玉を飛ばして
しばらくじっと眺めてみよう
色玉が静かに底に沈んだら
今度はマウスでクリックね
メッセージを押してもう一度
Processingは楽しいな
ArrayList letters;
PFont font;
int numLetters;
void setup(){
size(320, 460);
letters = new ArrayList();
numLetters = 100;
font = createFont("Helvetica", 18, true);
smooth();
noLoop();
}
void draw(){
if (letters.size() < numLetters){
letters.add(new Letter());
}
background(0);
boolean allStop = true;
for (int i = 0; i<letters.size(); i++){
Letter l = (Letter) letters.get(i);
l.collide(letters);
l.move();
l.display();
if (allStop && mag(l.spx, l.spy) < 2) allStop = true;
else allStop = false;
}
if (allStop){
fill(204, 255, 0, 90);
textFont(font);
textSize(18);
text("Processing is fun!", width/2, height/3);
}
}
class Letter
{
char[] alphabet= {'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', 'K',
'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V',
'W', 'X', 'Y', 'Z'};
char letter;
float x, y, spx, spy, r, tsize;
color c;
float FRICTION = -0.7;
float SPRING = 0.3;
float GRAVITY = 0.07;
boolean on_collition;
public Letter () {
letter = alphabet[int(random(alphabet.length))];
r = 12;
tsize = 10;
x = 0;
y = height;
spx = random(-0.5, 0.5);
spy = -0.5;
c = randomColor();
on_collition = false;
}
void move() {
spy += GRAVITY;
x += spx;
y += spy;
if (x + r > width) {
x = width - r;
spx *= FRICTION;
}
else if (x - r < 0) {
x = r;
spx *= FRICTION;
}
if (y + r > height) {
y = height - r;
spy *= FRICTION;
}
if (mag(spx, spy) < 0.8 && on_collition){
spx = spy = 0;
}
on_collition = false;
}
void bounce() {
float minx = r;
float maxx = width-r;
float maxy = height -r;
if (x < minx || x > maxx){
spx = -spx * FRICTION;
if (x < minx) { x = 2*minx - x;}
else { x = 2*maxx -x; }
}
if (y > maxy){
spy = -spy * FRICTION;
y = 2*maxy - y;
}
}
void collide(ArrayList others) {
for (int i = 0; i<others.size(); i++){
Letter other = (Letter) others.get(i);
if (this == other) return;
float ox = other.x;
float oy = other.y;
float distance = dist(x, y, ox, oy);
float minDist = other.r + r;
if (distance <= minDist){
float angle = atan2(oy-y, ox-x);
float targetX = x + cos(angle) * minDist;
float targetY = y + sin(angle) * minDist;
float ax = (targetX - ox) * SPRING;
float ay = (targetY - oy) * SPRING;
spx -= ax;
spy -= ay;
other.spx += ax;
other.spy += ay;
on_collition = true;
}
}
}
void display() {
fill(c, 80);
noStroke();
ellipseMode(CENTER);
ellipse(x, y, r*2, r*2);
textAlign(CENTER);
textSize(tsize);
fill(c);
text(letter, x, y+r/3);
on_collition = false;
}
private color randomColor() {
color c = color(random(255), random(255), random(255));
return c;
}
}
void mousePressed() {
float d = dist(mouseX, mouseY, width/2, height/3);
if (d < 100) { setup(); loop(); };
for (int i = 0; i<letters.size(); i++){
Letter letter = (Letter) letters.get(i);
float dd = dist(mouseX, mouseY, letter.x, letter.y);
if (dd < letter.r){
letter.spx += random(-2, 2);
letter.spy -= 12;
}
}
}
(追記:2011年1月31日)メッセージのクリックでリスタートできるようにしました。