double brightness(); int crossp(); double dotp(); int endpic(); int gammacorrect(); int lightray(); int linepic(); double normalize(); int setup(); int shade(); int startpic(); int viewing(); int yyparse(); int maksph(); double intsph(); int nrmsph(); int makbox(); double intbox(); int nrmbox(); int maktri(); double inttri(); int nrmtri(); int maksup(); double intsup(); int nrmsup();