// Simple vector class that holds an x,y,z position.
  
  class Tuple {
    float x, y, z;
  
    public Tuple() { }
  
    public Tuple(float x, float y, float z) {
      set(x, y, z);
    }
  
    public void set(float x, float y, float z) {
      this.x = x;
      this.y = y;
      this.z = z;
    }
    
    public void target(Tuple another, float amount) {
      float amount1 = 1.0 - amount;
      x = x*amount1 + another.x*amount;
      y = y*amount1 + another.y*amount;
      z = z*amount1 + another.z*amount;
    }
    
    public void phil() {
      fill(x, y, z);
    }
    
    public void tran() {
      translate(x, y, z);
    }
  }