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models:: Collignon projection

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Zeno Rogue committed 2019-09-12 22:50:13 +02:00
1 parent 2c073c1ec1
commit df9c01f276
4 files changed
+37 -21
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hypgraph.cpp
+10 -16
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@@ -310,6 +310,8 @@ hyperpoint compute_hybrid(hyperpoint H, int rootid) {
return ret;
}
EX ld signed_sqrt(ld x) { return x > 0 ? sqrt(x) : -sqrt(-x); };
EX void applymodel(hyperpoint H, hyperpoint& ret) {
hyperpoint H_orig = H;
@@ -682,23 +684,15 @@ EX void applymodel(hyperpoint H, hyperpoint& ret) {
break;
case mdCollignon:
find_zlev(H); /* does not look nicely otherwise */
if(hyperbolic) H = ypush(-1) * H;
find_zlev(H);
makeband(H, ret, [] (ld& x, ld& y) {
auto signed_sqrt = [] (ld x) { return x > 0 ? sqrt(x) : -sqrt(-x); };
/*
if(sphere) {
y = M_PI / 2 - y;
x = sin_auto(y/2) * x;
y = (sin_auto(y/2) - .5) * M_PI;
}
if(hyperbolic) {
ld mul = signed_sqrt(sinh(y) + 1);
x *= mul;
y = mul + signed_sqrt(sinh(1) + 1);
}*/
y = signed_sqrt(sin_auto(y) + whatever[0]);
x *= y;
ld sgn = 1;
if(vid.collignon_reflected && y > 0) y = -y, sgn = -1;
y = signed_sqrt(sin_auto(y) + vid.collignon_parameter);
x *= y / 1.2;
y -= signed_sqrt(vid.collignon_parameter);
y *= sgn;
y *= M_PI;
});
break;