2013資訊設計 processing 製作/ m10110302 林秉毅

太極旋轉球!!!!

兩顆球
一個順時針往畫面中心旋轉漸漸縮小
一個逆時針往畫面中心旋轉漸漸縮小

Car myCar1;
Car myCar2; // Two objects!
float xc, yc;

void setup() {
  size(600,600);
  xc=width/2;
  yc=height/2;
  // Parameters go inside the parentheses when the object is constructed.
  myCar1 = new Car(color(255,255,255),300,20,0.05,100);
  myCar2 = new Car(color(0,0,0),-300,20,0.05,100);
}

void draw() {
  background(70);
  myCar1.drive();
  myCar1.display();
  myCar2.drive();
  myCar2.display();

}

// Even though there are multiple objects, we still only need one class.
// No matter how many cookies we make, only one cookie cutter is needed.
class Car {
  color c;
  float xi;
  float yi;
  float N;
  float R;
  float speed;
  float count=0;
  float jen;
  float jenS;
  float size;

  // The Constructor is defined with arguments.
  Car(color tempC, float Ri, float Ni,float speedi, float sizei) {
    c = tempC;
    N = Ni;
    R=Ri;
    speed=speedi;
    jen=R/(N/speed);
    size=sizei;
    jenS=size/(N/speed);
  }

  void display() {
    stroke(1);
    fill(c);
   
    ellipse(xc+R*cos(count*2*PI/N),yc+R*sin(count*2*PI/N),size,size);
  }

  void drive() {
    R-=jen;
    size-=jenS;
    count +=speed;
   
    if (count >= N) {
      count = 0;
      R=jen*(N/speed);
      size=jenS*(N/speed);
    }
  }
}