private MinMaxXY UpdateMinMax(SquareData sd, MinMaxXY old)
{
MinMaxXY neu = new MinMaxXY();
neu.MinX = (sd.Left < old.MinX) ? sd.Left : old.MinX;
neu.MaxX = (sd.Left + sd.Size > old.MaxX) ? (sd.Left + sd.Size) : old.MaxX;
neu.MinY = (sd.Top < old.MinY) ? sd.Top : old.MinY;
neu.MaxY = (sd.Top + sd.Size > old.MaxY) ? (sd.Top + sd.Size) : old.MaxY;
return(neu);
}
public List <SquareData> Calculate(float limitX, float limitY)
{
List <SquareData> result = new List <SquareData>();
Fibonacci fib = new Fibonacci();
ColorsGen colGen = new ColorsGen();
MinMaxXY mmNew;
MinMaxXY mm = new MinMaxXY();
// Start by generating squares around (0,0)
for (int i = 0; ; i++)
{
int size = fib.Current;
fib.MoveNext();
SquareData sd = MakeSquare(i % 4, size, mm);
sd.Fill = colGen.Current;
colGen.MoveNext();
mmNew = UpdateMinMax(sd, mm);
if ((mmNew.MaxX - mmNew.MinX > limitX) || (mmNew.MaxY - mmNew.MinY > limitY))
{
break; // We've already reached the limit. Quit.
}
else
{
mm = mmNew;
result.Add(sd);
}
}
// Now shift everything so that no negative values exist
float shiftX = (mm.MinX < 0) ? -mm.MinX : 0;
float shiftY = (mm.MinY < 0) ? -mm.MinY : 0;
foreach (var sd in result)
{
sd.Left += shiftX;
sd.Top += shiftY;
}
return(result);
}
private SquareData MakeSquare(int direction, int size, MinMaxXY mmxy)
{
SquareData sd = new SquareData();
sd.Size = size;
switch (direction)
{
case 0: // up
sd.Left = mmxy.MinX;
sd.Top = mmxy.MinY - size;
sd.Fill = Colors.Green;
break;
case 1: // left
sd.Left = mmxy.MinX - size;
sd.Top = mmxy.MinY;
sd.Fill = Colors.Red;
break;
case 2: // down
sd.Left = mmxy.MinX;
sd.Top = mmxy.MaxY;
sd.Fill = Colors.Blue;
break;
case 3: // right
sd.Left = mmxy.MaxX;
sd.Top = mmxy.MinY;
sd.Fill = Colors.Yellow;
break;
default:
throw new Exception("Unknown direction value");
}
return(sd);
}
