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fixed lie_exp to use correct rules in solnih, and also avoid division by h[2] == 0

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Zeno Rogue 2022-05-17 09:37:32 +02:00
parent b9fd64e1d9
commit 69a82a8ce1
1 changed files with 17 additions and 11 deletions
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28
hypgraph.cpp
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@ -2957,24 +2957,30 @@ EX hyperpoint lie_exp(hyperpoint h) {
h[3] = 1; h[3] = 1;
h[2] += h[0] * h[1] / 2; h[2] += h[0] * h[1] / 2;
} }
else if(sol) { else if(sol && !nih) {
h[3] = 1; h[3] = 1;
h[0] *= (exp(-h[2]) - 1) / -h[2]; if(abs(h[2]) > 1e-6) {
h[1] *= (exp(+h[2]) - 1) / h[2]; h[0] *= (exp(-h[2]) - 1) / -h[2];
h[1] *= (exp(+h[2]) - 1) / h[2];
}
} }
else if(sol && nih) { else if(sol && nih) {
h[3] = 1; h[3] = 1;
ld z = h[2] * log(2); if(abs(h[2]) > 1e-6) {
h[0] *= (exp(-z) - 1) / -z; ld z = h[2] * log(2);
z = h[2] * log(3); h[0] *= (exp(-z) - 1) / -z;
h[1] *= (exp(+z) - 1) / z; z = h[2] * log(3);
h[1] *= (exp(+z) - 1) / z;
}
} }
else if(nih) { else if(nih) {
h[3] = 1; h[3] = 1;
ld z = h[2] * log(2); if(abs(h[2]) > 1e-6) {
h[0] *= (exp(+z) - 1) / z; ld z = h[2] * log(2);
z = h[2] * log(3); h[0] *= (exp(+z) - 1) / z;
h[1] *= (exp(+z) - 1) / z; z = h[2] * log(3);
h[1] *= (exp(+z) - 1) / z;
}
} }
else { else {
/* not implemented -- approximate for now */ /* not implemented -- approximate for now */