improved display in Halloween

blizzard.cpp

@@ -1,5 +1,11 @@
 double randd() { return (rand() % 1000000) / 1000000. + .0000005; }
 
+transmatrix cellrelmatrix(cell *c, int i) {
+  double d =
+    purehepta ? tessf : c->type == 6 ? hexhexdist : crossf;
+  return ddspin(c, i) * xpush(d) * iddspin(c->mov[i], c->spin(i), euclid ? 0 : S42);
+  }
+
 hyperpoint randomPointIn(int t) {
   while(true) {
     hyperpoint h = spin(2*M_PI*(randd()-.5)/t) * tC0(xpush(asinh(randd())));