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Code Issues Releases Wiki Activity

randomdir option for generate_random_path

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This commit is contained in:
Zeno Rogue 2021-07-31 12:48:17 +02:00
parent ebfe0b6f48
commit 0f2f435534
1 changed files with 12 additions and 7 deletions
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19
geometry2.cpp
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@ -825,6 +825,7 @@ EX bool exhaustive_distance_appropriate() {
#if HDR
struct pathgen {
cellwalker start;
cellwalker last;
vector<cell*> path;
bignum full_id_0;
int last_id;
@ -833,10 +834,10 @@ struct pathgen {
EX pathgen generate_random_path_randomdir(cellwalker start, int length, bool for_yendor) {
start.spin = hrand(start.at->type);
return generate_random_path(start, length, for_yendor);
return generate_random_path(start, length, for_yendor, false);
}
EX pathgen generate_random_path(cellwalker start, int length, bool for_yendor) {
EX pathgen generate_random_path(cellwalker start, int length, bool for_yendor, bool randomdir) {
pathgen p;
p.start = start;
p.path.resize(length+1);
@ -858,11 +859,13 @@ EX pathgen generate_random_path(cellwalker start, int length, bool for_yendor) {
if(isize(prev)) at = prev[hrand(isize(prev))];
}
p.path[0] = start.at;
p.last = p.path.back();
}
else if(hybri) {
/* I am lazy */
for(int i=1; i<=length; i++) p.path[i] = p.path[i-1]->cmove(p.path[i-1]->type-1);
p.last = p.path.back();
}
else {
@ -871,7 +874,6 @@ EX pathgen generate_random_path(cellwalker start, int length, bool for_yendor) {
bool onlychild = true;
cellwalker ycw = start;
ycw--; if(S3 == 3) ycw--;
if(for_yendor) setdist(p.path[0], 7, NULL);
for(int i=0; i<length; i++) {
@ -900,9 +902,12 @@ EX pathgen generate_random_path(cellwalker start, int length, bool for_yendor) {
}
else if(trees_known()) {
auto sdist = [start] (cell *c) { return celldistance(start.at, c); };
if(i == 0) {
t = type_in(expansion, start.at, [start] (cell *c) { return celldistance(start.at, c); });
bignum b = expansion.get_descendants(length, t);
t = type_in(expansion, randomdir ? start.at : start.cpeek(), sdist);
ycw--;
if(valence() == 3) ycw--;
bignum b = expansion.get_descendants(randomdir ? length : length-1, t);
p.full_id_0 = full_id = hrand(b);
}
@ -922,8 +927,7 @@ EX pathgen generate_random_path(cellwalker start, int length, bool for_yendor) {
for(int tch: expansion.children[t]) {
ycw++;
if(i == 1)
tch = type_in(expansion, ycw.cpeek(), [start] (cell *c) { return celldistance(start.at, c); });
if(i < 2) tch = type_in(expansion, ycw.cpeek(), sdist);
auto& sub_id = expansion.get_descendants(length-1-i, tch);
if(full_id < sub_id) { t = tch; break; }
@ -972,6 +976,7 @@ EX pathgen generate_random_path(cellwalker start, int length, bool for_yendor) {
ycw += wstep;
p.path[i+1] = ycw.at;
}
p.last = ycw + rev;
}
return p;
}