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intra:: fixed mirroring

This commit is contained in:
Zeno Rogue 2021-09-30 15:02:16 +02:00
parent ed88c6dfbb
commit b3fc40a8fc
1 changed files with 6 additions and 1 deletions
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7
intra.cpp
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@ -128,7 +128,6 @@ EX portal_data make_portal(cellwalker cw, int spin) {
if(MDIM == 3) for(int i=0; i<4; i++) id.iT[3][i] = id.iT[i][3] = i==3;
int first = spin;
int second = spin + 1;
if(in_s2xe() || sphere) swap(first, second);
first = gmod(first, isize(fac));
second = gmod(second, isize(fac));
id.co0 = id.to_poco(fac[first]);
@ -193,6 +192,12 @@ void connect_portal_1(cellwalker cw1, cellwalker cw2, int spin) {
if(debugflags & DF_GEOM) for(int i=0; i<4; i++)
println(hlog, "mapping ", get_column(T1, i), " to ", get_column(T2, i));
p.T = T2 * inverse(T1);
if(det(p.T) < 0) {
set_column(T2, 0, p.id2.co1);
set_column(T2, 1, p.id2.co0);
p.T = T2 * inverse(T1);
}
}
}