topical media & game development

topical media & game development

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

graphic-processing-site-examples-Basics-Objects-Inheritance-Inheritance.pde / pde

Inheritance A class can be defined using another class as a foundation. In object-oriented programming terminology, one class can inherit fi elds and methods from another. An object that inherits from another is called a subclass, and the object it inherits from is called a superclass. A subclass extends the superclass.


  
  
  SpinSpots spots;
  SpinArm arm;
  
  void setup() 
  {
    size(200, 200);
    smooth();
    arm = new SpinArm(width/2, height/2, 0.01);
    spots = new SpinSpots(width/2, height/2, -0.02, 33.0);
  }
  
  void draw() 
  {
    background(204);
    arm.update();
    arm.display();
    spots.update();
    spots.display();
  }
  
  class Spin 
  {
    float x, y, speed;
    float angle = 0.0;
    Spin(float xpos, float ypos, float s) {
      x = xpos;
      y = ypos;
      speed = s;
    }
    void update() {
      angle += speed;
    }
  }
  
  class SpinArm extends Spin 
  {
    SpinArm(float x, float y, float s) {
      super(x, y, s);
    }
    void display() {
      strokeWeight(1);
      stroke(0);
      pushMatrix();
      translate(x, y);
      angle += speed;
      rotate(angle);
      line(0, 0, 66, 0);
      popMatrix();
    }
  }
  
  class SpinSpots extends Spin 
  {
    float dim;
    SpinSpots(float x, float y, float s, float d) {
      super(x, y, s);
      dim = d;
    }
    void display() {
      noStroke();
      pushMatrix();
      translate(x, y);
      angle += speed;
      rotate(angle);
      ellipse(-dim/2, 0, dim, dim);
      ellipse(dim/2, 0, dim, dim);
      popMatrix();
    }
  }

[] readme course(s) preface I 1 2 II 3 4 III 5 6 7 IV 8 9 10 V 11 12 afterthought(s) appendix reference(s) example(s) resource(s) _

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