It might be a rounding issue. rect.x is always the nearest integer I think. It's better to store position as a float and then only round when drawing.--On Tue, Apr 28, 2015 at 4:28 PM, Charles Cossà <ccosse@xxxxxxxxx> wrote:Well I just spent 15 minutes looking at your code ... nothing obvious jumps out, except inconsistent use of variables and representations. Let me ask: Can you write a simple pygame program that makes a sprite move in a circle, yourself, right now?ÂOn Tue, Apr 28, 2015 at 11:10 AM, Charles Cossà <ccosse@xxxxxxxxx> wrote:CharlesYou'd have to post more code for anyone to help with you in/out of class problem ...Hi,Typically x=r*cos(angle) and y=r*sin(angle) ... you've got the opposite.On Tue, Apr 28, 2015 at 6:52 AM, diliup gabadamudalige <diliupg@xxxxxxxxx> wrote:Looking at the code on this page lines 47 & 48http://programarcadegames.com/python_examples/show_file.php?file=sprite_circle_movement.pyis there a way to doÂself.rect.x += some valueself.rect.y +=some valuerather thanself.rect.x=self.radius*math.sin(self.angle)+self.center_xself.rect.y=self.radius*math.cos(self.angle)+self.center_y?
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   Jeffrey Kleykamp