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Fixes bug computing cross slope

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This commit is contained in:
Richard Brice
2026-05-25 10:28:40 -07:00
committed by Thomas Krijnen
parent 9169e8ed24
commit 54dd0b5448
1 changed files with 3 additions and 4 deletions
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src/ifcgeom/mapping/IfcCurveSegment.cpp
+3 -4
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@@ -491,11 +491,10 @@ class curve_segment_evaluator {
// tilt angle in the plane of the cross section
auto cant = Cant(u);
auto tilt_angle = start_angle + delta_angle * (cant - start_cant) / delta_cant;
Eigen::Vector4d z(0.0, cos(tilt_angle), sin(tilt_angle), 0.0);
Eigen::Vector4d axis(0.0, cos(tilt_angle), sin(tilt_angle), 0.0);
// compute axis direction
Eigen::Vector4d y = z.cross3(ref_dir);
Eigen::Vector4d axis = ref_dir.cross3(y);
// compute cross slope direction
Eigen::Vector4d y = axis.cross3(ref_dir);
Eigen::Matrix4d m = Eigen::Matrix4d::Identity();
m.col(0) = ref_dir;