def function(self,p):
        """Selects and returns one of the patterns in the list."""
        pg = p.generator
        motion_orientation=p.orientation+pi/2.0

        new_x = p.x+p.size*pg.x
        new_y = p.y+p.size*pg.y

        image_array = pg(xdensity=p.xdensity,ydensity=p.ydensity,bounds=p.bounds,
                         x=new_x + p.speed*p.step*np.cos(motion_orientation),
                         y=new_y + p.speed*p.step*np.sin(motion_orientation),
                         orientation=p.orientation,
                         scale=pg.scale*p.scale,offset=pg.offset+p.offset)

        return image_array
def function ( self , p ) : pg = p . generator motion_orientation = p . orientation + pi / 2.0 new_x = p . x + p . size * pg . x new_y = p . y + p . size * pg . y image_array = pg ( xdensity = p . xdensity , ydensity = p . ydensity , bounds = p . bounds , x = new_x + p . speed * p . step * np . cos ( motion_orientation ) , y = new_y + p . speed * p . step * np . sin ( motion_orientation ) , orientation = p . orientation , scale = pg . scale * p . scale , offset = pg . offset + p . offset ) return image_array
Selects and returns one of the patterns in the list.