main.py 文件源码

def consider_collide(self,pushx,pushy):
        """
        method to recursively find the point on a straight line where a collision occurs with
        tile object containing collision properties (t,b,l,r : top, bottom, left, right)
        Updates an Rect instance value with the x,y location at the point of collision for
        later use.  Uses recursion instead of iteration because endpoint is not known prior to
        calling the method.

        :param pushx: normalised vector describing the direction to move, already pre-computed by the touch angle
        plus the touch location
        :param pushy: normalised vector describing the direction to move, already pre-computed by the touch angle
        plus the touch location
        :return: always returns None
        """
        self.plotrect = Rect((self.pos[0]+(self.width*.42))+pushx,(self.pos[1]+(self.height*.35))+pushy,
                             self.size[0]*.16, self.size[1]*.29)
        numnum = len(self.map.map.layers['blocker'].collide(self.plotrect, 'blocker'))
        if numnum >= 1:
            return None
        pushx += self.movedir.x
        pushy += self.movedir.y
        self.consider_collide(pushx,pushy)