From 76f8e355022b001dead35b8913af039fb97c739f Mon Sep 17 00:00:00 2001
From: Alessandro Ranellucci <aar@cpan.org>
Date: Sat, 9 Jul 2016 14:28:24 +0200
Subject: [PATCH] Center mesh around origin for POV export

---
 xs/src/libslic3r/IO.cpp           |  1 +
 xs/src/libslic3r/TriangleMesh.cpp | 10 ++++++++++
 xs/src/libslic3r/TriangleMesh.hpp |  1 +
 3 files changed, 12 insertions(+)

diff --git a/xs/src/libslic3r/IO.cpp b/xs/src/libslic3r/IO.cpp
index 60c1ff686b..ee81924e5c 100644
--- a/xs/src/libslic3r/IO.cpp
+++ b/xs/src/libslic3r/IO.cpp
@@ -50,6 +50,7 @@ bool
 POV::write(TriangleMesh& mesh, std::string output_file)
 {
     TriangleMesh mesh2 = mesh;
+    mesh2.center_around_origin();
     {
         Sizef3 size = mesh2.bounding_box().size();
         coordf_t maxdim = fmax(size.x, fmax(size.y, size.y));
diff --git a/xs/src/libslic3r/TriangleMesh.cpp b/xs/src/libslic3r/TriangleMesh.cpp
index d29503de7f..cea6706e99 100644
--- a/xs/src/libslic3r/TriangleMesh.cpp
+++ b/xs/src/libslic3r/TriangleMesh.cpp
@@ -262,6 +262,16 @@ void TriangleMesh::align_to_origin()
     );
 }
 
+void TriangleMesh::center_around_origin()
+{
+    this->align_to_origin();
+    this->translate(
+        -(this->stl.stats.size.x/2),
+        -(this->stl.stats.size.y/2),
+        -(this->stl.stats.size.z/2)
+    );
+}
+
 void TriangleMesh::rotate(double angle, Point* center)
 {
     this->translate(-center->x, -center->y, 0);
diff --git a/xs/src/libslic3r/TriangleMesh.hpp b/xs/src/libslic3r/TriangleMesh.hpp
index 62c38e90b5..f0dd66fbad 100644
--- a/xs/src/libslic3r/TriangleMesh.hpp
+++ b/xs/src/libslic3r/TriangleMesh.hpp
@@ -41,6 +41,7 @@ class TriangleMesh
     void mirror_y();
     void mirror_z();
     void align_to_origin();
+    void center_around_origin();
     void rotate(double angle, Point* center);
     TriangleMeshPtrs split() const;
     void merge(const TriangleMesh &mesh);