..........                                          ..........
.........~                                          ~.........
........~*                                          *~........
.......~*%                                          %*~.......
......~*%*                                          *%*~......
.....~*%*#                                     .    #*%*~.....
....~*%*#¶                                        . ¶#*%*~....
...~*%*#¶@                                    . ~.  @¶#*%*~...
..~*%*#¶@# gull call.                    .      . ~ #@¶#*%*~..
.~*%*#¶@## «««««««««««««««««««««««««««««««««««««««« ##@¶#*%*~.
..~*%*#¶@#                                          #@¶#*%*~..
...~*%*#¶@ the  seagull is a metaphysics  trick;  a @¶#*%*~...
....~*%*#¶ world-builder's  shortcut, to  define  a ¶#*%*~....
.....~*%*# section  of reality  and imply its size: #*%*~.....
......~*%* place a flock of birds  at  the edge and *%*~......
.......~*% make  their  calls  tesselate  over  the %*~.......
........~* entire volume                            *~........
.........~                                          ~.........
.......... a seagull can be  defined  by  as little ..........
.......... as  five  vertices;  six  triangles.  (i ..........
.......... would  recommend handling in  swarms  of ..........
.......... at least a dozen birds.)                 ..........
..........                                          ..........
.........~                                          ~.........
........~*                                          *~........
.......~*%                                          %*~.......
......~*%*                                          *%*~......