actions.py 文件源码

 复制代码def compute_side(self, x, y):
        """ Computes which sides of dpad are supposed to be active """
        ## dpad(up, down, left, right)
        ## dpad8(up, down, left, right, upleft, upright, downleft, downright)
        side = self.SIDE_NONE
        if x*x + y*y > self.MIN_DISTANCE_P2:
            # Compute angle from center of pad to finger position
            angle = (atan2(x, y) * 180.0 / PI) + 180
            # Translate it to index
            index = 0
            for a1, a2, i in self.ranges:
                if angle >= a1 and angle < a2:
                    index = i
                    break
            side = self.SIDES[index]
        return side