allemang.d/toddcox-visualize
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Use free instead of lst_idx=-1

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This commit is contained in:
David Allemang
2022-09-14 20:59:28 -04:00
parent 4347f1f9ec
commit c815ea3152
1 changed files with 20 additions and 10 deletions
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30
tc/src/core.cpp
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@@ -15,8 +15,13 @@ namespace tc {
* Rows document the "loops" formed by
*/
struct Row {
int gnr = 0; // the number of cosets identified so far
size_t lst_idx = -1; // the index of the coset that would complete the loop
bool free = true;
// the number of cosets identified so far
int gnr = 0;
// the index of the coset that would complete the loop
size_t lst_idx = 0;
};
struct Tables {
@@ -66,7 +71,6 @@ namespace tc {
}
std::vector<Coset> lst_vals;
Coset null_lst_idx = 0;
rel_tables.add_row();
for (int table_idx = 0; table_idx < rel_tables.size(); ++table_idx) {
Rel &rel = rel_tables.rels[table_idx];
@@ -75,9 +79,10 @@ namespace tc {
if (cosets.get(rel.gens[0]) + cosets.get(rel.gens[1]) == -2) {
row.lst_idx = lst_vals.size();
lst_vals.push_back(0);
row.free = false;
row.gnr = 0;
} else {
row.lst_idx = null_lst_idx;
row.free = false;
row.gnr = -1;
}
}
@@ -135,13 +140,16 @@ namespace tc {
// Test if loop is closed
Coset other_gen = rel.gens[0] == gen ? rel.gens[1] : rel.gens[0];
if (trow.lst_idx == -1) {
if (trow.free) {
if (target == coset) {
trow.gnr = -1;
}
trow.lst_idx = crow.lst_idx;
trow.gnr = crow.gnr + 1;
trow = crow;
trow.gnr++;
// trow.lst_idx = crow.lst_idx;
// trow.free = crow.free;
// trow.gnr = crow.gnr + 1;
if (crow.gnr < 0)
trow.gnr -= 2;
@@ -163,19 +171,21 @@ namespace tc {
}
}
// Find rows which are still not part of any loop, and assign them to a new loop.
// If any target row wasn't identified with a loop,
// then assign it a new loop.
for (size_t table_idx = 0; table_idx < rel_tables.size(); table_idx++) {
auto &rel = rel_tables.rels[table_idx];
auto &trow = rel_tables.rows[target][table_idx];
if (trow.lst_idx == -1) {
if (trow.free) {
if ((cosets.get(target, rel.gens[0]) != target) and
(cosets.get(target, rel.gens[1]) != target)) {
trow.lst_idx = lst_vals.size();
trow.free = false;
lst_vals.push_back(0);
trow.gnr = 0;
} else {
trow.lst_idx = null_lst_idx;
trow.free = false;
trow.gnr = -1;
}
}