From e8357f60d55130d639a2af275c2da7066f0642b3 Mon Sep 17 00:00:00 2001
From: Aleksandr Dobkin <alex@dobk.in>
Date: Wed, 11 Mar 2026 00:28:14 -0700
Subject: [PATCH] Fix ZAA test failure in test_extrusion_entity.cpp

---
 src/libslic3r/Point.hpp                   | 3 +++
 tests/fff_print/test_extrusion_entity.cpp | 9 +++++----
 2 files changed, 8 insertions(+), 4 deletions(-)

diff --git a/src/libslic3r/Point.hpp b/src/libslic3r/Point.hpp
index f75bbb9a46..bde79076ef 100644
--- a/src/libslic3r/Point.hpp
+++ b/src/libslic3r/Point.hpp
@@ -280,6 +280,9 @@ public:
     Point3(const Point3 &rhs) { *this = rhs; }
     explicit Point3(const Point &rhs, coord_t z = 0) : Vec3crd(rhs.x(), rhs.y(), z) {}
     explicit Point3(const Vec3crd &vec3crd) : Vec3crd(vec3crd) {}
+    // This constructor allows you to construct Point from Eigen expressions
+    template<typename OtherDerived>
+    explicit Point3(const Eigen::MatrixBase<OtherDerived> &other) : Vec3crd(other) {}
 
     static Point3 new_scale(coordf_t x, coordf_t y, coordf_t z) {
         return Point3(coord_t(scale_(x)), coord_t(scale_(y)), coord_t(scale_(z)));
diff --git a/tests/fff_print/test_extrusion_entity.cpp b/tests/fff_print/test_extrusion_entity.cpp
index 4c41c2dc8d..f568825baf 100644
--- a/tests/fff_print/test_extrusion_entity.cpp
+++ b/tests/fff_print/test_extrusion_entity.cpp
@@ -11,18 +11,19 @@
 
 using namespace Slic3r;
 
-static inline Slic3r::Point random_point(float LO=-50, float HI=50) 
+static inline Slic3r::Point3 random_point3(float LO=-50, float HI=50)
 {
-    Vec2f pt = Vec2f(LO, LO) + (Vec2d(rand(), rand()) * (HI-LO) / RAND_MAX).cast<float>();
-	return pt.cast<coord_t>();
+    Vec3f pt = Vec3f(LO, LO, LO) + (Vec3d(rand(), rand(), rand()) * (HI-LO) / RAND_MAX).cast<float>();
+	return Point3(pt.cast<coord_t>());
 }
 
+
 // build a sample extrusion entity collection with random start and end points.
 static Slic3r::ExtrusionPath random_path(size_t length = 20, float LO = -50, float HI = 50)
 {
     ExtrusionPath t {erPerimeter, 1.0, 1.0, 1.0};
     for (size_t j = 0; j < length; ++ j)
-        t.polyline.append(random_point(LO, HI));
+        t.polyline.append(random_point3(LO, HI));
     return t;
 }