Re: [pygame] Pygame 2D vector

[DR0ID <dr0id@xxxxxxxxxx>]

On 23.07.2011 14:23, sam.hacking@xxxxxxxx wrote:

Well, when I type "-1**2" into Python, it returns -1. If I run "1**2 + -1**2" it returns 0. So, is there a bug in Python then? Running 2.6.6 on Ubuntu 10.10.

 

Removing the if statement from get_angle fixed the angle problem for me, because of this.

 

On Sat, 23 Jul 2011 13:56 +0200, "DR0ID" <dr0id@xxxxxxxxxx> wrote:

Your mistake basically was that you assumed that  -1 ** 2 == -1 which is not.

Hi again

    def get_angle(self):
        if (self.get_length_sqrd() == 0):
            return 0
        return math.degrees(math.atan2(self.y, self.x))

Well the 0 length check is ok, since a 0 length vector does not really have an angle. But I guess you see it now.

~DR0ID