private static void CheckEndPoint(int width, int height, IntPoint start, ref IntPoint end)
{
if (end.X >= width)
{
int newEndX = width - 1;
double c = (double)(newEndX - start.X) / (end.X - start.X);
end.Y = (int)(start.Y + c * (end.Y - start.Y));
end.X = newEndX;
}
if (end.Y >= height)
{
int newEndY = height - 1;
double c = (double)(newEndY - start.Y) / (end.Y - start.Y);
end.X = (int)(start.X + c * (end.X - start.X));
end.Y = newEndY;
}
if (end.X < 0)
{
double c = (double)(0 - start.X) / (end.X - start.X);
end.Y = (int)(start.Y + c * (end.Y - start.Y));
end.X = 0;
}
if (end.Y < 0)
{
double c = (double)(0 - start.Y) / (end.Y - start.Y);
end.X = (int)(start.X + c * (end.X - start.X));
end.Y = 0;
}
}
}
