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fixed Archimedean embeddings

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This commit is contained in:
Zeno Rogue 2023-05-23 11:46:05 +02:00
parent da687e8874
commit c6b27c5b27
1 changed files with 20 additions and 17 deletions
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35
archimedean.cpp
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@ -412,9 +412,9 @@ void archimedean_tiling::regroup() {
}
geometryinfo1& archimedean_tiling::get_geometry(ld mul) {
if(euclidean_angle_sum * mul < 1.999999) return ginf[gSphere].g;
else if(euclidean_angle_sum * mul > 2.000001) return ginf[gNormal].g;
else return ginf[gEuclid].g;
if(euclidean_angle_sum * mul < 1.999999) return giSphere2;
else if(euclidean_angle_sum * mul > 2.000001) return giHyperb2;
else return giEuclid2;
}
void archimedean_tiling::compute_geometry() {
@ -422,19 +422,17 @@ void archimedean_tiling::compute_geometry() {
if(embedded_plane && geometry != gArchimedean) return;
if(embedded_plane) return IPF(compute_geometry());
ginf[gArchimedean].g = get_geometry();
set_flag(ginf[gArchimedean].flags, qCLOSED, get_class() == gcSphere);
auto gg = get_geometry();
if(geom3::ginf_backup.size()) {
if(get_geometry().kind == gcSphere)
geom3::ginf_backup[gArchimedean].g = geom3::ginf_backup[gSphere].g;
if(get_geometry().kind == gcEuclid)
geom3::ginf_backup[gArchimedean].g = geom3::ginf_backup[gNormal].g;
if(get_geometry().kind == gcHyperbolic)
geom3::ginf_backup[gArchimedean].g = geom3::ginf_backup[gEuclid].g;
if(geom3::flipped) swap(geom3::ginf_backup[gArchimedean].g, ginf[gArchimedean].g);
set_flag(ginf[gArchimedean].flags, qCLOSED, get_class() == gcSphere);
for(int a=0; a<2; a++) {
auto& arr = a ? geom3::ginf_backup : ginf;
if(arr.empty()) continue;
if(gg.kind == gcSphere) arr[gArchimedean].g = arr[gSphere].g;
if(gg.kind == gcEuclid) arr[gArchimedean].g = arr[gNormal].g;
if(gg.kind == gcHyperbolic) arr[gArchimedean].g = arr[gEuclid].g;
set_flag(arr[gArchimedean].flags, qCLOSED, gg.kind == gcSphere);
}
if(geom3::flipped) swap(geom3::ginf_backup[gArchimedean].g, ginf[gArchimedean].g);
DEBB(DF_GEOM, (format("euclidean_angle_sum = %f\n", float(euclidean_angle_sum))));
@ -460,6 +458,9 @@ void archimedean_tiling::compute_geometry() {
/* inradius[N] is used in farcorner and nearcorner. Probably a bug */
bool need_flip = embedded_plane;
if(need_flip) geom3::light_flip(true);
if(real_faces == 2) {
/* standard methods fail for dihedra, but the answer is easy */
edgelength = TAU / faces[0];
@ -493,9 +494,9 @@ void archimedean_tiling::compute_geometry() {
auto& c = circumradius[i];
c = asin_auto(sin_auto(edgelength/2) / sin(gamma));
inradius[i] = hdist0(mid(lxpush0(circumradius[i]), xspinpush0(2*gamma, circumradius[i])));
inradius[i] = hdist0(mid(xpush0(circumradius[i]), cspin(0, 1, 2*gamma) * xpush0(circumradius[i])));
hyperpoint h = lxpush(c) * spin(M_PI - 2*gamma) * lxpush0(c);
hyperpoint h = xpush(c) * cspin(0, 1, M_PI - 2*gamma) * xpush0(c);
ld a = atan2(h);
cyclefix(a, 0);
if(a < 0) a = -a;
@ -513,6 +514,8 @@ void archimedean_tiling::compute_geometry() {
if(euclid) break;
}
if(need_flip) geom3::light_flip(false);
DEBB(DF_GEOM, (format("computed edgelength = %f\n", float(edgelength))));
triangles.clear();