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Normalized quaternions before converting to Rot3 to account for limited precision in text files.

release/4.3a0
Frank dellaert 2020-07-09 17:16:11 -04:00
parent 5ab16c8b51
commit 4960f75595
1 changed files with 9 additions and 3 deletions
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12
gtsam/slam/dataset.cpp
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@ -511,6 +511,11 @@ void writeG2o(const NonlinearFactorGraph& graph, const Values& estimate,
stream.close();
}
/* ************************************************************************* */
static Rot3 NormalizedRot3(double w, double x, double y, double z) {
const double norm = sqrt(w * w + x * x + y * y + z * z), f = 1.0 / norm;
return Rot3::Quaternion(f * w, f * x, f * y, f * z);
}
/* ************************************************************************* */
std::map<Key, Pose3> parse3DPoses(const string& filename) {
ifstream is(filename.c_str());
@ -535,14 +540,15 @@ std::map<Key, Pose3> parse3DPoses(const string& filename) {
Key id;
double x, y, z, qx, qy, qz, qw;
ls >> id >> x >> y >> z >> qx >> qy >> qz >> qw;
poses.emplace(id, Pose3(Rot3::Quaternion(qw, qx, qy, qz), {x, y, z}));
poses.emplace(id, Pose3(NormalizedRot3(qw, qx, qy, qz), {x, y, z}));
}
}
return poses;
}
/* ************************************************************************* */
BetweenFactorPose3s parse3DFactors(const string& filename,
BetweenFactorPose3s parse3DFactors(
const string& filename,
const noiseModel::Diagonal::shared_ptr& corruptingNoise) {
ifstream is(filename.c_str());
if (!is) throw invalid_argument("parse3DFactors: can not find file " + filename);
@ -592,7 +598,7 @@ BetweenFactorPose3s parse3DFactors(const string& filename,
mgtsam.block<3, 3>(3, 0) = m.block<3, 3>(3, 0); // off diagonal
SharedNoiseModel model = noiseModel::Gaussian::Information(mgtsam);
auto R12 = Rot3::Quaternion(qw, qx, qy, qz);
auto R12 = NormalizedRot3(qw, qx, qy, qz);
if (sampler) {
R12 = R12.retract(sampler->sample());
}