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fixed a bug in some spherical tilings

This commit is contained in:
Zeno Rogue 2020-03-22 10:15:03 +01:00
parent b2a6ae304d
commit 0153cb905a
1 changed files with 10 additions and 0 deletions
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10
arbitrile.cpp
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@ -61,6 +61,16 @@ void shape::build_from_angles_edges() {
at = at * xpush(edges[i]) * spin(angles[i]);
}
if(!eqmatrix(at, Id)) throw hr_parse_exception("polygon error");
if(sqhypot_d(3, ctr) < 1e-2) {
// this may happen for some spherical tilings
// try to move towards the center
println(hlog, "special case encountered");
for(int i=0; i<n; i++) {
ctr += at * xpush(edges[i]) * spin((angles[i]+M_PI)/2) * xpush0(.01);
at = at * xpush(edges[i]) * spin(angles[i]);
}
println(hlog, "ctr = ", ctr);
}
ctr = normalize(ctr);
for(auto& v: vertices) v = gpushxto0(ctr) * v;
}