Fibonacci Graph

feylya

OK, hopefully somebody can help me. I'm trying to right a program at the moment for college that draws this graph based on Fibonacci numbers:



Now, I can draw the individual arcs no problem and they're all the right sizes and so on. My problem comes from trying to line up the starts and ends of the arcs so that it's a continous line. I'm writing this in Java so the origin of the arc is actually the origin of the rectangle the arc fits into. I'm not sure how to explain my problem properly but hopefully somebody knows what I'm talking about and can help me. Cheers.

Syth

It would be helpful if you were to post up some code that attempted.

Well if I was attempting this I'd first ignore the arcs and focus on the bounding boxes for each arc. If you can devise a procedure that can tell you the position and shape of the box for an index you pass in (where index 0 is the 13 shape), then you have half the job done, thus you can write a method like this: public Box getBoxWithThisIndex(int boxIndex);

If you want to draw an arc when you are given an box, you need more information than just the box's position and shape. You need to know the orientation of the arc, so just number the possible orientations. If orientation=0 then it's like the 13 (and 2) shape, 1 is like the 8 (and 1) shape, 2 is the 5 shape, and 3 is the 3 shape. That way you can write a method like this: public void drawArc(Box boundingBox, int orientationIndex, Graphics g);

Then if you want to draw the lot you'd just have to stick em in a for loop like this: for (int i=0; i<numWanted; i++) { drawArc(getBoxWithThisIndex(i), i, g); }

Hope this helps, if you've done yours fundamentally different from the way I've suggested, then I'll probably not be of much help. And you shouldn't be getting people to do you're homework!

feylya

Well, here's my code in it's current crazy state:

      	for (int i = 5; i < getSize().width; i++)
        {

			height = fibonacci(i);
			//x = (getSize().width / 2)-(height / 2);
    		//y = (getSize().height / 2)-(height / 2);

    		arcX = x - (height/2);
			arcY = y - (height/2);

			difference = height - prevFib;


			move = fibonacci(i-1);


			if (startAngle == 0)	//Bottom Left
			{
				arcX = arcX - difference;
				arcY = arcY;// + height;
				g.drawArc(arcX, arcY, height, height, startAngle, angle);
			}
			else if (startAngle == 90)		//Bottom Right
			{
				arcX = arcX;//+ height;
				arcY = arcY + difference;//+ height;
				g.drawArc(arcX, arcY, height, height, startAngle, angle);
			}
			else if (startAngle == 180)		//Top right
			{
				arcX = arcX + difference;//+ height;
				arcY = arcY;//
				g.drawArc(arcX, arcY, height, height, startAngle, angle);
			}
			else if (startAngle == 270)		//Top Left
			{
				arcX = arcX;
				arcY = arcY - difference;
				g.drawArc(arcX, arcY, height, height, startAngle, angle);
			}

			g.drawString (s.valueOf(height), arcX + (height/2), arcY);
			//g.drawRect(arcX,arcY,height,height);



	    	startAngle = startAngle + 90;
	    	if (startAngle >= 360)
	    	{
	    		startAngle = 0;
			}

			prevFib = height;


        }

I've been trying to figure out the boxes but I just can't get it.