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magmahep:: hashing for quicker generation

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This commit is contained in:
Zeno Rogue 2020-06-08 12:57:13 +02:00
parent bcdd404e42
commit 5dcd8d120c
1 changed files with 30 additions and 14 deletions
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44
rogueviz/magmahep.cpp
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@ -47,6 +47,10 @@ EX transmatrix get_adj(int a, int b) {
return Res;
}
pair<int, int> hash(hyperpoint h) {
return {int(h[0] * 1000000 + .5), int(h[1] * 1000000 + .5)};
}
void make() {
int& v = magmav;
@ -66,6 +70,26 @@ void make() {
for(int i=0; i<magmav; i++) hcenter += vertices[i];
hcenter = normalize(hcenter);
vertices.resize(magmav);
for(int i=0; i<magmav; i++) vertices.push_back(vertices[i]);
for(int i=0; i<magmav; i++) vertices.push_back(vertices[i]);
unordered_map<pair<int, int>, int> counts;
int big = v - 2;
auto rehash = [&] (const transmatrix& T) {
for(int a=0; a<v; a++) {
auto hashval = hash(T * vertices[a]);
if(a == 2 || a == down)
counts[hashval]++;
else if(a > 2 && a < down)
counts[hashval] += 2*v - big;
else
counts[hashval] += big;
}
};
heps.emplace_back(Id, 0xFFFFFFFF);
auto advance = [&] (int i, int j, bool mirror = false) {
@ -140,26 +164,16 @@ void make() {
for(auto& h: heps) h.first = gpushxto0(center) * h.first;
counts.clear();
for(auto& h: heps) rehash(h.first);
/* grow */
for(int a=0; a<magmacount; a++) {
hyperpoint p = heps.back().first * vertices[2];
int total = 0;
int total = counts[hash(p)];
int big = v - 2;
for(auto& h: heps)
for(int a=0; a<v; a++)
if(hdist(h.first * vertices[a], p) < .001) {
if(a == 2 || a == down)
total ++;
else if(a > 2 && a < down)
total += 2*v - big;
else
total += big;
}
println(hlog, "total ", total);
if(total == 2*v)
advance(down, down, true);
@ -170,6 +184,8 @@ void make() {
advance(t, 0);
else
break;
rehash(heps.back().first);
}
}