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fixed a bug which crashed spherical Archimedean tilings on Windows. Also more statistics on Archimedean tilings.

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This commit is contained in:
Zeno Rogue 2018-08-23 01:52:29 +02:00
parent a1e532d5a0
commit 6c6dd85994
3 changed files with 40 additions and 16 deletions
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52
archimedean.cpp
View File

@ -66,6 +66,8 @@ struct archimedean_tiling {
void regroup();
string world_size();
eGeometryClass get_class();
ld scale();
};
@ -108,6 +110,9 @@ void archimedean_tiling::make_match(int a, int i, int b, int j) {
void archimedean_tiling::prepare() {
euclidean_angle_sum = 0;
for(int f: faces) euclidean_angle_sum += (f-2.) / f;
for(int i: faces) if(i > MAX_EDGE) {
errormsg = XLAT("currently no more than %1 edges", its(MAX_EDGE));
errors++;
@ -252,9 +257,6 @@ void archimedean_tiling::prepare() {
}
regroup();
euclidean_angle_sum = 0;
for(int f: faces) euclidean_angle_sum += (f-2.) / f;
}
void archimedean_tiling::regroup() {
@ -299,12 +301,16 @@ void archimedean_tiling::regroup() {
} )
}
eGeometryClass archimedean_tiling::get_class() {
if(euclidean_angle_sum < 1.999999) return gcSphere;
else if(euclidean_angle_sum > 2.000001) return gcHyperbolic;
else return gcEuclid;
}
void archimedean_tiling::compute_geometry() {
if(euclidean_angle_sum < 1.999999) ginf[gArchimedean].cclass = gcSphere;
else if(euclidean_angle_sum > 2.000001) ginf[gArchimedean].cclass = gcHyperbolic;
else ginf[gArchimedean].cclass = gcEuclid;
ginf[gArchimedean].cclass = get_class();
SDEBUG( printf("euclidean_angle_sum = %lf\n", double(euclidean_angle_sum)); )
SDEBUG( printf("euclidean_angle_sum = %f\n", float(euclidean_angle_sum)); )
dynamicval<eGeometry> dv(geometry, gArchimedean);
@ -340,28 +346,34 @@ void archimedean_tiling::compute_geometry() {
ld alpha_total = 0;
for(int i=0; i<N; i++) {
ld crmin = 0, crmax = sphere ? M_PI : 10;
ld crmin = 0, crmax = sphere ? M_PI/2 : 10;
ld el = 0;
for(int q=0; q<100; q++) {
circumradius[i] = (crmin + crmax) / 2;
hyperpoint p1 = xpush0(circumradius[i]);
hyperpoint p2 = spin(2 * M_PI / faces[i]) * p1;
inradius[i] = hdist0(mid(p1, p2));
if(hdist(p1, p2) > edgelength) crmax = circumradius[i];
el = hdist(p1, p2);
if(el > edgelength) crmax = circumradius[i];
else crmin = circumradius[i];
}
if(el < edgelength - 1e-3) alpha_total += 100; // could not make an edge that long
hyperpoint h = xpush(edgelength/2) * xspinpush0(M_PI/2, inradius[i]);
alphas[i] = atan2(-h[1], h[0]);
ld a = atan2(-h[1], h[0]);
if(a < 0) a += 2 * M_PI;
alphas[i] = a;
// printf(" H = %s alp = %f\n", display(h), (float) atan2(-h[1], h[0]));
alpha_total += alphas[i];
}
// printf("el = %lf alpha = %lf\n", double(edgelength), double(alpha_total));
// printf("el = %f alpha = %f\n", float(edgelength), float(alpha_total));
if(sphere ^ (alpha_total > M_PI)) elmin = edgelength;
else elmax = edgelength;
if(euclid) break;
}
SDEBUG( printf("computed edgelength = %lf\n", double(edgelength)); )
SDEBUG( printf("computed edgelength = %f\n", float(edgelength)); )
triangles.clear();
triangles.resize(2*N+2);
@ -384,7 +396,7 @@ void archimedean_tiling::compute_geometry() {
SDEBUG( for(auto& ts: triangles) {
printf("T");
for(auto& t: ts) printf(" %lf@%lf", double(t.first), double(t.second));
for(auto& t: ts) printf(" %f@%f", float(t.first), float(t.second));
printf("\n");
} )
@ -1010,6 +1022,11 @@ void show() {
dialog::addBreak(100);
dialog::addSelItem(XLAT("full angle"), fts(edited.euclidean_angle_sum * 180) + "°", 0);
dialog::addSelItem(XLAT("size of the world"), edited.world_size(), 0);
edited.compute_geometry();
dialog::addSelItem(XLAT("edge length"), fts(edited.edgelength) + (edited.get_class() == gcEuclid ? XLAT(" (arbitrary)") : ""), 0);
current.compute_geometry();
dialog::addBreak(100);
}
else {
@ -1048,6 +1065,9 @@ void show() {
});
if(archimedean) {
dialog::addSelItem(XLAT("size of the world"), current.world_size(), 0);
dialog::addSelItem(XLAT("edge length"), current.get_class() == gcEuclid ? (fts(current.edgelength) + XLAT(" (arbitrary)")) : fts6(current.edgelength), 0);
dialog::addItem(XLAT("color by symmetries"), 't');
dialog::add_action([] () {
firstland = specialland = laCanvas;
@ -1093,6 +1113,8 @@ void show() {
}
string archimedean_tiling::world_size() {
if(get_class() == gcEuclid) return "∞";
int nom = 2 - N, denom = 2;
for(int f: faces) {
int g = gcd(denom, f);
@ -1110,11 +1132,13 @@ string archimedean_tiling::world_size() {
anom /= g; adenom /= g;
if(adenom < 0) anom = -anom, adenom = -adenom;
string s;
if(anom < 0) s = "exp(∞)*", anom = -anom;
bool hyp = (anom < 0);
if(hyp) anom = -anom;
if(adenom > 1)
s += its(anom) + "/" + its(adenom);
else
s += its(anom);
if(hyp) s += " exp(∞)";
return s;
}

3
geom-exp.cpp
View File

@ -355,10 +355,9 @@ void showEuclideanMenu() {
dialog::addSelItem(XLAT("quotient space"), XLAT(qstring), 0);
dialog::addSelItem(XLAT("size of the world"),
(archimedean && euclid) ? "∞" :
archimedean ? arcm::current.world_size() :
(archimedean && sphere) ? its(isize(currentmap->allcells())) :
worldsize < 0 ? "exp(∞)*" + (nom%denom ? its(nom)+"/"+its(-denom) : its(-worldsize)):
worldsize < 0 ? (nom%denom ? its(nom)+"/"+its(-denom) : its(-worldsize)) + " exp(∞)":
worldsize == 0 ? "∞" :
its(worldsize),
'3');

1
util.cpp
View File

@ -29,6 +29,7 @@ string its(int i) { char buf[64]; sprintf(buf, "%d", i); return buf; }
string fts(float x) { char buf[64]; sprintf(buf, "%4.2f", x); return buf; }
string fts3(float x) { char buf[64]; sprintf(buf, "%5.3f", x); return buf; }
string fts4(float x) { char buf[64]; sprintf(buf, "%6.4f", x); return buf; }
string fts6(float x) { char buf[64]; sprintf(buf, "%8.6f", x); return buf; }
string ftsg(float x) { char buf[64]; sprintf(buf, "%4.2g", x); return buf; }
string ftssmart(ld x) {