__init__.py 文件源码

def invert(self):
        """
        Inverts this Collision in place to yield the Collision for the case that the two Sprites are switched.
        """
        # flip the sprites
        tmp = self.sprite1
        self.sprite1 = self.sprite2
        self.sprite2 = tmp
        # invert the normal and separate (leave distance negative, leave magnitude positive)
        self.normal_x = -self.normal_x
        self.normal_y = -self.normal_y
        self.separate = [-self.separate[0], -self.separate[1]]
        # the direction veloc
        self.direction_veloc = -self.direction_veloc
        return self


## OBSOLETE CLASS
#class PlatformerCollision(Collision):
#    """
#    A collision object that can be used by PlatformerPhysics to handle Collisions.
#    """
#
#    def __init__(self):
#        super().__init__()
#        self.impact = 0.0  # the impulse of the collision on some mass (used for pushing heavy objects)

#        # OBSOLETE: these should all be no longer needed
#        # self.slope = False  # whether this is a collision with a sloped TileSprite of a TiledTileLayer
                            # (will also be False if obj1 collides with the Tile's rect, but obj1 is still in air (slope))
#        # self.slope_y_pull = 0  # amount of y that Sprite has to move up (negative) or down (positive) because of the collision (with a slope)
#        #self.slope_up_down = 0  # 0=no slope, -1=down slope, 1 = up slope