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Measurement: make the edge endpoint detection threshold smaller for short edges

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This commit is contained in:
Lukas Matena 2022-11-08 12:15:14 +01:00
parent 41c6da913d
commit a09c269584
1 changed files with 7 additions and 3 deletions
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10
src/libslic3r/Measure.cpp
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@ -10,7 +10,6 @@ namespace Measure {
constexpr double feature_hover_limit = 0.5; // how close to a feature the mouse must be to highlight it
constexpr double edge_endpoint_limit = 0.5; // how close to an edge endpoint the mouse ...
static std::pair<Vec3d, double> get_center_and_radius(const std::vector<Vec3d>& border, int start_idx, int end_idx, const Transform3d& trafo)
{
@ -467,6 +466,8 @@ std::optional<SurfaceFeature> MeasuringImpl::get_feature(size_t face_idx, const
MeasurementResult res;
SurfaceFeature point_sf(point);
assert(plane.surface_features.empty() || plane.surface_features.back().get_type() == SurfaceFeatureType::Plane);
for (size_t i=0; i<plane.surface_features.size() - 1; ++i) {
// The -1 is there to prevent measuring distance to the plane itself,
// which is needless and relatively expensive.
@ -484,9 +485,12 @@ std::optional<SurfaceFeature> MeasuringImpl::get_feature(size_t face_idx, const
const SurfaceFeature& f = plane.surface_features[closest_feature_idx];
if (f.get_type() == SurfaceFeatureType::Edge) {
// If this is an edge, check if we are not close to the endpoint. If so,
// we will include the endpoint as well.
constexpr double limit_sq = edge_endpoint_limit * edge_endpoint_limit;
// we will include the endpoint as well. Close = 10% of the lenghth of
// the edge, clamped between 0.025 and 0.5 mm.
const auto& [sp, ep] = f.get_edge();
double len_sq = (ep-sp).squaredNorm();
double limit_sq = std::max(0.025*0.025, std::min(0.5*0.5, 0.1 * 0.1 * len_sq));
if ((point-sp).squaredNorm() < limit_sq)
return std::make_optional(SurfaceFeature(sp));
if ((point-ep).squaredNorm() < limit_sq)