Processing 教程（10）- 多个对象的行为

class JitterBug{
float x;
float y;
int diameter;
float speed = 10;
// 构造函数：创建对象时把初值加入；

JitterBug(float tempX, float tempY, int tempDiameter){
x = tempX;
y = tempY;
diameter = tempDiameter;
}

// 添加方法：
void move(){
x += random(-speed,speed);
y += random(-speed,speed);
}

void display(){
ellipse(x,y,diameter,diameter);
}
}

JitterBug[] bug;

void setup(){
size(720,404);
smooth();

bug = new JitterBug[33];
for (int i = 0; i < bug.length; i++)
{
float x = random(width);
float y = random(height);
int r = i + 2;
bug[i] = new JitterBug(x,y,r);
}
}

void draw()
{
for (int i = 0; i < bug.length; i++)
{
bug[i].move();
bug[i].display();
}
}