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rotspace:: shift: implemented using cellwalkers, works correctly in bounded spaces now

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This commit is contained in:
Zeno Rogue 2020-07-28 13:15:41 +02:00
parent 33647a56c2
commit 475d16451a
1 changed files with 60 additions and 15 deletions
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75
nonisotropic.cpp
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@ -1114,28 +1114,27 @@ EX namespace hybrid {
return res;
}
EX int& get_shift_current(cell *c, int i) {
return make_shift(c)[i];
EX int& get_shift_current(cellwalker cw) {
return make_shift(cw.at)[cw.spin];
}
EX bool have_shift(cell *c, int i) {
return shifts.count(c) && get_shift_current(c, i) != SHIFT_UNKNOWN;
EX bool have_shift(cellwalker cw) {
return shifts.count(cw.at) && get_shift_current(cw) != SHIFT_UNKNOWN;
}
EX int get_shift(cell *c, int i) {
EX int get_shift(cellwalker cw0) {
if(S3 >= OINF) return 0;
auto& v = get_shift_current(c, i);
auto& v = get_shift_current(cw0);
if(v != SHIFT_UNKNOWN) return v;
vector<int> candidates;
for(int a: {1, -1}) {
cellwalker cw0(c, i);
cellwalker cw = cw0;
cw += wstep; cw += a;
int s = 0;
while(cw != cw0) {
if(!have_shift(cw.at, cw.spin)) goto next;
if(!have_shift(cw)) goto next;
s += shifts[cw.at][cw.spin];
cw += wstep;
cw += a;
@ -1153,33 +1152,78 @@ EX namespace hybrid {
int val = 0;
auto cw1 = cw0+wstep;
if(1) {
/* the value from PSL, helps to draw the underlying space correctly */
auto ps = cgi.psl_steps;
val = i*ps / c->type - c->c.spin(i)*ps / c->move(i)->type + ps/2;
val = cw0.spin*ps / cw0.at->type - cw1.spin*ps / cw1.at->type + ps/2;
}
if(!candidates.empty()) val = candidates[0];
v = val;
get_shift_current(c->move(i), c->c.spin(i)) = -val;
get_shift_current(cw1) = -val;
return val;
}
EX void ensure_shifts(cell *c) {
if(S3 >= OINF) return;
if(have_shift(c, c->type)) return;
if(!make_shift(c)[c->type]) return;
forCellEx(c1, c)
for(int a=0; a<c->type; a++) {
cellwalker cw0(c, a);
cellwalker cw = cw0;
while(cw != cw0) {
get_shift(cw.at, cw.spin);
get_shift(cw);
cw += wstep;
cw += a;
}
}
get_shift_current(c, c->type) = 0;
make_shift(c)[c->type] = 0;
}
EX int cycle_discrepancy(cellwalker cw0) {
int total = 0;
auto cw = cw0;
do {
total += get_shift(cw);
cw += wstep;
cw++;
}
while(cw != cw0);
return total + cgi.single_step * (sphere ? -1 : 1);
}
EX void fix_bounded_cycles() {
if(!rotspace) return;
if(!bounded) return;
in_underlying([&] {
cellwalker final(currentmap->gamestart(), 0);
auto& ac = currentmap->allcells();
for(cell *c: ac) for(int i=0; i<c->type; i++) {
cellwalker cw(c, i);
int cd = cycle_discrepancy(cw);
if(!cd) continue;
while(cw != final) {
if(celldist(cw.peek()) < celldist(cw.at)) {
cw += wstep;
cw++;
}
else {
get_shift_current(cw) -= cd;
get_shift_current(cw+wstep) += cd;
cw++;
}
}
}
disc_quotient = abs(cycle_discrepancy(final));
if(debugflags & DF_GEOM) for(cell *c: ac) for(int i=0; i<c->type; i++) {
cellwalker cw(c, i);
if(cycle_discrepancy(cw)) println(hlog, cw, cycle_discrepancy(cw));
}
});
}
template<class T> auto in_underlying(const T& t) -> decltype(t()) {
@ -1214,6 +1258,7 @@ EX namespace hybrid {
disc_quotient = 0;
in_underlying([this] { initcells(); underlying_map = currentmap; });
for(hrmap*& m: allmaps) if(m == underlying_map) m = NULL;
fix_bounded_cycles();
}
~hrmap_hybrid() {
@ -1249,7 +1294,7 @@ EX namespace hybrid {
if(geometry == gRotSpace) {
auto cm = (hrmap_hybrid*)currentmap;
m->in_underlying([&] { cm->ensure_shifts(cu); });
s = ((hrmap_hybrid*)currentmap)->get_shift(cu, d);
s = ((hrmap_hybrid*)currentmap)->get_shift(cellwalker(cu, d));
}
cell *c1 = get_at(cu1, m->where[c].second + s);
c->c.connect(d, c1, d1, cu->c.mirror(d));