private double calculateLength(MyPoint p1, MyPoint p2)
{
return(Math.Sqrt((p1.X - p2.X) * (p1.X - p2.X) + (p1.Y - p2.Y) * (p1.Y - p2.Y)));
}
public override void movePoint(MyPoint p1, MyPoint p2, ref int dX, ref int dY)
{
p2.Y = p1.Y;
}
private void DrawLine(MyPoint p1, MyPoint p2, PaintEventArgs e)
{
PointF drawPoint = new PointF(Math.Abs(p1.X - p2.X) / 2 + 5 + Math.Min(p1.X, p2.X), Math.Abs(p2.Y - p1.Y) / 2 + 5 + Math.Min(p1.Y, p2.Y));
FindRestriction(p1, p2)?.drawIcon(e.Graphics, drawPoint);
int x = p1.X;
int y = p1.Y;
int x2 = p2.X;
int y2 = p2.Y;
int w = x2 - x;
int h = y2 - y;
int dx1 = 0, dy1 = 0, dx2 = 0, dy2 = 0;
if (w < 0)
{
dx1 = -1;
}
else if (w > 0)
{
dx1 = 1;
}
if (h < 0)
{
dy1 = -1;
}
else if (h > 0)
{
dy1 = 1;
}
if (w < 0)
{
dx2 = -1;
}
else if (w > 0)
{
dx2 = 1;
}
int longest = Math.Abs(w);
int shortest = Math.Abs(h);
if (!(longest > shortest))
{
longest = Math.Abs(h);
shortest = Math.Abs(w);
if (h < 0)
{
dy2 = -1;
}
else if (h > 0)
{
dy2 = 1;
}
dx2 = 0;
}
int numerator = longest >> 1;
for (int i = 0; i <= longest; i++)
{
e.Graphics.FillRectangle(Brushes.White, x, y, 1, 1);
numerator += shortest;
if (!(numerator < longest))
{
numerator -= longest;
x += dx1;
y += dy1;
}
else
{
x += dx2;
y += dy2;
}
}
}
abstract public void movePoint(MyPoint p1, MyPoint p2, ref int dX, ref int dY);