ref: a3f2d6d23ed1be69fee607bdedadc0438fd01305
dir: /sys/src/cmd/eqn/sqrt.c/
#include "e.h" void sqrt(int p2) { static int af = 0; int nps; /* point size for radical */ double radscale = 0.95; if (ttype == DEVPOST) radscale = 1.05; nps = ps * radscale * eht[p2] / EM(1.0,ps) + 0.99; /* kludgy */ nps = max(EFFPS(nps), ps); yyval = p2; if (ttype == DEVCAT || ttype == DEVAPS) eht[yyval] = EM(1.2, nps); else if (ttype == DEVPOST) eht[yyval] = EM(1.15, nps); else /* DEV202, DEVPOST */ eht[yyval] = EM(1.15, nps); dprintf(".\tS%d <- sqrt S%d;b=%g, h=%g, nps=%d\n", yyval, p2, ebase[yyval], eht[yyval], nps); printf(".as %d \\|\n", yyval); nrwid(p2, ps, p2); if (af++ == 0) printf(".af 10 01\n"); /* make it two digits when it prints */ printf(".nr 10 %.3fu*\\n(.su/10\n", 9.2*eht[p2]); /* this nonsense */ /* guesses point size corresponding to height of stuff */ printf(".ds %d \\v'%gm'\\s(\\n(10", yyval, REL(ebase[p2],ps)); if (ttype == DEVCAT || ttype == DEVAPS) printf("\\v'-.2m'\\(sr\\l'\\n(%du\\(rn'\\v'.2m'", p2); else /* DEV202, DEVPOST so far */ printf("\\(sr\\l'\\n(%du\\(rn'", p2); printf("\\s0\\v'%gm'\\h'-\\n(%du'\\^\\*(%d\n", REL(-ebase[p2],ps), p2, p2); lfont[yyval] = rfont[yyval] = ROM; }