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Code Issues Releases Wiki Activity

basic generate_random_path in strict_tree_rules

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Zeno Rogue
2021-07-31 13:36:57 +02:00
parent 3972e5a6bb
commit c8b4d6b159
3 changed files with 41 additions and 0 deletions
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33
geometry2.cpp
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@@ -872,6 +872,7 @@ EX pathgen generate_random_path(cellwalker start, int length, bool for_yendor, b
int t = -1;
bignum full_id;
bool onlychild = true;
bool launched = false;
cellwalker ycw = start;
if(for_yendor) setdist(p.path[0], 7, NULL);
@@ -901,6 +902,37 @@ EX pathgen generate_random_path(cellwalker start, int length, bool for_yendor, b
if(isize(ds)) ycw += ds[hrand(isize(ds))];
}
else if(currentmap->strict_tree_rules()) {
if(for_yendor && i < arb::current.yendor_backsteps) {
println(hlog, i, " < ", arb::current.yendor_backsteps);
ycw.spin = 0;
}
else {
if(!launched) {
t = ycw.at->master->fieldval;
bignum b = expansion.get_descendants(length-i, t);
p.full_id_0 = full_id = hrand(b);
/* it may happen that the subtree dies out */
if(!full_id.approx_int()) goto stupid;
launched = true;
}
ycw.spin = 0;
auto& r = rulegen::treestates[t];
for(int ri=0; ri<isize(r.rules); ri++) {
int tch = r.rules[ri];
if(tch < 0) continue;
auto& sub_id = expansion.get_descendants(length-1-i, tch);
if(full_id < sub_id) {
t = tch; ycw += ri; break;
}
full_id.addmul(sub_id, -1);
}
}
}
else if(trees_known()) {
auto sdist = [start] (cell *c) { return celldistance(start.at, c); };
if(i == 0) {
@@ -951,6 +983,7 @@ EX pathgen generate_random_path(cellwalker start, int length, bool for_yendor, b
}
else {
stupid:
// stupid
ycw += rev;
// well, make it a bit more clever on bitruncated a4 grids