modify local AABB compute

primitive_process/interface/primitive/axis/polyline_extrude_axis.hpp

@@ -17,6 +17,19 @@ struct PE_API polyline_extrude_axis final : public extrude_axis {
     {
         aabb_t res{};
         for (const auto& v : vertices) res.extend(Eigen::Vector3d{v[0], v[1], 0});
+        for (size_t i = 0; i < bulges.size(); ++i) {
+            if (std::abs(bulges[i]) <= epsilon) continue;
+            const auto& a = vertices[i];
+            const auto& b = vertices[i + 1];
+            const auto half_ab   = 0.5 * (a + b);
+            const auto bisec_vec = 0.5 * Eigen::Vector2d{a.y() - b.y(), b.x() - a.x()};
+            const auto center    = half_ab + bisec_vec / bulges[i];
+            const auto ca        = a - center;
+            const auto half_theta = std::atan(bulges[i]);
+            Eigen::Rotation2Dd rot{half_theta};
+            const auto mid = center + rot * ca;
+            res.extend(Eigen::Vector3d{mid[0], mid[1], 0});
+        }
         return res;
     }