Added build only unittest for normal computations

git-svn-id: http://www.openmesh.org/svnrepo/OpenMesh/trunk@574 fdac6126-5c0c-442c-9429-916003d36597

src/Unittests/unittests.cc

@@ -7,6 +7,7 @@
 #include "unittests_trimesh_collapse.hh"
 #include "unittests_trimesh_circulators.hh"
 #include "unittests_decimater.hh"
+#include "unittests_trimesh_normal_calculations.hh"
 
 int main(int _argc, char** _argv) {
 

src/Unittests/unittests_trimesh_normal_calculations.hh

@@ -0,0 +1,106 @@
+#ifndef INCLUDE_UNITTESTS_NORMAL_CALCULATIONS_HH
+#define INCLUDE_UNITTESTS_NORMAL_CALCULATIONS_HH
+
+#include <gtest/gtest.h>
+#include <Unittests/unittests_common.hh>
+
+#include <iostream>
+
+class OpenMeshNormals : public OpenMeshBase {
+
+    protected:
+
+        // This function is called before each test is run
+        virtual void SetUp() {
+        }
+
+        // This function is called after all tests are through
+        virtual void TearDown() {
+
+            // Do some final stuff with the member data here...
+        }
+
+    // Member already defined in OpenMeshBase
+    //Mesh mesh_;  
+};
+
+/*
+ * ====================================================================
+ * Define tests below
+ * ====================================================================
+ */
+
+/*
+ * Collapsing a tetrahedron
+ */
+TEST_F(OpenMeshNormals, NormalCalculations) {
+
+  mesh_.clear();
+
+  // Add some vertices
+  Mesh::VertexHandle vhandle[4];
+
+  vhandle[0] = mesh_.add_vertex(Mesh::Point(0, 0, 0));
+  vhandle[1] = mesh_.add_vertex(Mesh::Point(0, 1, 0));
+  vhandle[2] = mesh_.add_vertex(Mesh::Point(1, 1, 0));
+  vhandle[3] = mesh_.add_vertex(Mesh::Point(0, 0, 1));
+
+  // Add four faces
+  std::vector<Mesh::VertexHandle> face_vhandles;
+
+  face_vhandles.push_back(vhandle[0]);
+  face_vhandles.push_back(vhandle[1]);
+  face_vhandles.push_back(vhandle[2]);
+  mesh_.add_face(face_vhandles);
+
+  face_vhandles.clear();
+
+  face_vhandles.push_back(vhandle[0]);
+  face_vhandles.push_back(vhandle[2]);
+  face_vhandles.push_back(vhandle[3]);
+  mesh_.add_face(face_vhandles);
+
+  face_vhandles.clear();
+
+  face_vhandles.push_back(vhandle[2]);
+  face_vhandles.push_back(vhandle[1]);
+  face_vhandles.push_back(vhandle[3]);
+  mesh_.add_face(face_vhandles);
+
+  face_vhandles.clear();
+
+  face_vhandles.push_back(vhandle[3]);
+  face_vhandles.push_back(vhandle[1]);
+  face_vhandles.push_back(vhandle[0]);
+  mesh_.add_face(face_vhandles);
+
+  // ===============================================
+  // Setup complete
+  // ===============================================
+
+
+  // Check one Request only vertex normals
+  // Face normals are required for vertex and halfedge normals, so 
+  // This will compute no normals and is only a runtime check if the blocks
+  // that prevent access to non existing properties are in place
+
+  mesh_.request_vertex_normals();
+  mesh_.request_face_normals();
+  mesh_.request_halfedge_normals();
+
+  // Automatically compute all normals
+  // As only vertex normals are requested and no face normals, this will compute nothing.
+  mesh_.update_normals();
+
+  // Face normals alone
+  mesh_.update_face_normals();
+
+  // Vertex normals alone (require valid face normals)
+  mesh_.update_vertex_normals();
+
+  // Halfedge normals alone (require valid face normals)
+  mesh_.update_halfedge_normals();
+
+}
+
+#endif // INCLUDE GUARD