From f60ff1c7ce02a577003910902a27414612b8de14 Mon Sep 17 00:00:00 2001
From: Lukas Matena <lukasmatena@seznam.cz>
Date: Fri, 13 Dec 2019 15:08:44 +0100
Subject: [PATCH] Fixup of previous commit: actually adding new source files

---
 src/libslic3r/MeshBoolean.cpp | 63 +++++++++++++++++++++++++++++++++++
 src/libslic3r/MeshBoolean.hpp | 17 ++++++++++
 2 files changed, 80 insertions(+)
 create mode 100644 src/libslic3r/MeshBoolean.cpp
 create mode 100644 src/libslic3r/MeshBoolean.hpp

diff --git a/src/libslic3r/MeshBoolean.cpp b/src/libslic3r/MeshBoolean.cpp
new file mode 100644
index 000000000..e639319a2
--- /dev/null
+++ b/src/libslic3r/MeshBoolean.cpp
@@ -0,0 +1,63 @@
+#include "MeshBoolean.hpp"
+
+// Include igl first. It defines "L" macro which then clashes with our localization
+#include <igl/copyleft/cgal/mesh_boolean.h>
+#undef L
+
+#include "libslic3r/TriangleMesh.hpp"
+
+
+namespace Slic3r {
+namespace MeshBoolean {
+
+typedef Eigen::Map<const Eigen::Matrix<float, Eigen::Dynamic, Eigen::Dynamic, Eigen::RowMajor | Eigen::DontAlign>> MapMatrixXfUnaligned;
+typedef Eigen::Map<const Eigen::Matrix<int,   Eigen::Dynamic, Eigen::Dynamic, Eigen::RowMajor | Eigen::DontAlign>> MapMatrixXiUnaligned;
+
+static TriangleMesh eigen_to_triangle_mesh(const Eigen::MatrixXd& VC, const Eigen::MatrixXi& FC)
+{
+    Pointf3s vertices;
+    for (size_t i=0; i<VC.rows(); ++i)
+        vertices.push_back(Vec3d(VC(i,0), VC(i,1), VC(i,2)));
+
+    std::vector<Vec3crd> facets;
+    for (size_t i=0; i<FC.rows(); ++i)
+        facets.push_back(Vec3crd(FC(i,0), FC(i,1), FC(i,2)));
+
+    TriangleMesh out(vertices, facets);
+    out.require_shared_vertices();
+    return out;
+}
+
+void minus(TriangleMesh& A, const TriangleMesh& B)
+{
+    Eigen::MatrixXd VA = MapMatrixXfUnaligned(A.its.vertices.front().data(), A.its.vertices.size(), 3).cast<double>();
+    Eigen::MatrixXi FA = MapMatrixXiUnaligned(A.its.indices.front().data(), A.its.indices.size(), 3);
+    Eigen::MatrixXd VB = MapMatrixXfUnaligned(B.its.vertices.front().data(), B.its.vertices.size(), 3).cast<double>();
+    Eigen::MatrixXi FB = MapMatrixXiUnaligned(B.its.indices.front().data(), B.its.indices.size(), 3);
+
+    Eigen::MatrixXd VC;
+    Eigen::MatrixXi FC;
+    igl::MeshBooleanType boolean_type(igl::MESH_BOOLEAN_TYPE_MINUS);
+    igl::copyleft::cgal::mesh_boolean(VA, FA, VB, FB, boolean_type, VC, FC);
+
+    A = eigen_to_triangle_mesh(VC, FC);
+}
+
+
+void self_union(TriangleMesh& mesh)
+{
+    Eigen::MatrixXd V = MapMatrixXfUnaligned(mesh.its.vertices.front().data(), mesh.its.vertices.size(), 3).cast<double>();
+    Eigen::MatrixXi F = MapMatrixXiUnaligned(mesh.its.indices.front().data(), mesh.its.indices.size(), 3);
+
+    Eigen::MatrixXd VC;
+    Eigen::MatrixXi FC;
+
+    igl::MeshBooleanType boolean_type(igl::MESH_BOOLEAN_TYPE_UNION);
+    igl::copyleft::cgal::mesh_boolean(V, F, Eigen::MatrixXd(), Eigen::MatrixXi(), boolean_type, VC, FC);
+    mesh = eigen_to_triangle_mesh(VC, FC);
+}
+
+
+
+} // namespace MeshBoolean
+} // namespace Slic3r
diff --git a/src/libslic3r/MeshBoolean.hpp b/src/libslic3r/MeshBoolean.hpp
new file mode 100644
index 000000000..783bde3f5
--- /dev/null
+++ b/src/libslic3r/MeshBoolean.hpp
@@ -0,0 +1,17 @@
+#ifndef libslic3r_MeshBoolean_hpp_
+#define libslic3r_MeshBoolean_hpp_
+
+
+namespace Slic3r {
+
+class TriangleMesh;
+
+namespace MeshBoolean {
+
+void minus(TriangleMesh& A, const TriangleMesh& B);
+void self_union(TriangleMesh& mesh);
+
+
+} // namespace MeshBoolean
+} // namespace Slic3r
+#endif // libslic3r_MeshBoolean_hpp_