Question

I’m trying to build an algorithm in java, which in ugly way looks like this:

while (true) {
    Point p; //a point given in the class constuctor.
    p.x+=1*factor;
    checkColor(p); // a function that returns true or false for a pixel color.
    p.y+=1*factor;
    checkColor(p);
    p.x-=2*factor;
    checkColor(p);
    p.y-=*factor;
    ... ...
}

This will use a int factor; that will increase every cycle in the loop,
but my point is if there is a way to store a ‘line of actions’ that will be executed 1 line at a time, when I call a a function.

Answer 1

what about doing something like this:

private processSequence = 0;
public void modifyPoint(Point p, int factor) {
  // do the stuff you need to do with x and y
  switch (processSequence) {
     case 0: p.x+= factor; break;
     case 1: p.y+=factor; break;
     ... etc
  }
  processSequence++;
  processSequence = processSequence % 4; 
}


...
while (true) {
  modifyPoint(p,factor);
  checkColor(p);
}

what you actually want to do is not easy to understand from the question it
self.