@#*/:.....                                          .....:/*#@
¤¤*/:::...                                          ...:::/*¤¤
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@#¤^^^/~:.                                        . .:~/^^^¤#@
##@#¤^/~:.                                    . :.  .:~/^¤#@##
#@#¤*^/~:. 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.)                 ...://*¤¤¤
¤^///:::..                                          ..:::///^¤
##*^~.....                                          .....~^*##
###¤*^/~:.                                          .:~/^*¤###
##@#¤*^~:.                                          .:~^*¤#@##
¤*^^~~:...                                          ...:~~^^*¤