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Added Unittest for modified butterfly

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This commit is contained in:
Jan Möbius
2019-04-09 13:44:17 +02:00
parent 752c8ef7d2
commit 9eee36de6d
3 changed files with 233 additions and 6 deletions
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4
src/OpenMesh/Tools/Subdivider/Uniform/LoopT.hh
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@@ -321,7 +321,7 @@ private: // topological modifiers
typename mesh_t::VertexHandle vh1(_m.to_vertex_handle(heh));
typename mesh_t::Point midP(_m.point(_m.to_vertex_handle(heh)));
midP += _m.point(_m.to_vertex_handle(opp_heh));
midP *= 0.5;
midP *= static_cast<RealType>(0.5);
// new vertex
vh = _m.new_vertex( midP );
@@ -393,7 +393,7 @@ private: // geometry helper
// boundary edge: just average vertex positions
if (_m.is_boundary(_eh) )
{
pos *= 0.5;
pos *= static_cast<RealType>(0.5);
}
else // inner edge: add neighbouring Vertices to sum
{

12
src/OpenMesh/Tools/Subdivider/Uniform/ModifiedButterFlyT.hh
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@@ -356,7 +356,11 @@ private: // topological modifiers
_m.set_face_handle( new_heh, _m.face_handle(heh) );
_m.set_halfedge_handle( vh, new_heh);
_m.set_halfedge_handle( _m.face_handle(heh), heh );
// We cant reconnect a non existing face, so we skip this here if necessary
if ( !_m.is_boundary(heh) )
_m.set_halfedge_handle( _m.face_handle(heh), heh );
_m.set_halfedge_handle( vh1, opp_new_heh );
// Never forget this, when playing with the topology
@@ -383,7 +387,7 @@ private: // geometry helper
{
pos = _m.point(a_0);
pos += _m.point(a_1);
pos *= static_cast<typename mesh_t::Point::value_type>(9.0/16.0);
pos *= static_cast<RealType>(9.0/16.0);
typename mesh_t::Point tpos;
if(_m.is_boundary(heh))
{
@@ -396,7 +400,7 @@ private: // geometry helper
tpos = _m.point(_m.to_vertex_handle(_m.next_halfedge_handle(opp_heh)));
tpos += _m.point(_m.to_vertex_handle(_m.opposite_halfedge_handle(_m.prev_halfedge_handle(opp_heh))));
}
tpos *= static_cast<typename mesh_t::Point::value_type>(-1.0/16.0);
tpos *= static_cast<RealType>(-1.0/16.0);
pos += tpos;
}
else
@@ -499,7 +503,7 @@ private: // geometry helper
}
else //at least one endpoint is [irregular and not in boundary]
{
typename mesh_t::Point::value_type normFactor = static_cast<typename mesh_t::Point::value_type>(0.0);
RealType normFactor = static_cast<RealType>(0.0);
if(valence_a_0!=6 && !_m.is_boundary(a_0))
{

223
src/Unittests/unittests_subdivider_uniform.cc
View File

@@ -1,6 +1,7 @@
#include <gtest/gtest.h>
#include <Unittests/unittests_common.hh>
#include <OpenMesh/Tools/Subdivider/Uniform/ModifiedButterFlyT.hh>
#include <OpenMesh/Tools/Subdivider/Uniform/CatmullClarkT.hh>
#include <OpenMesh/Tools/Subdivider/Uniform/LoopT.hh>
#include <OpenMesh/Tools/Subdivider/Uniform/Sqrt3T.hh>
@@ -550,4 +551,226 @@ TEST_F(OpenMeshSubdividerUniform_Poly, Midpoint) {
EXPECT_EQ(26u, mesh_.n_faces()) << "Wrong number of faces";
}
TEST_F(OpenMeshSubdividerUniform_Triangle, Modified_Butterfly) {
mesh_.clear();
// Add some vertices
Mesh::VertexHandle vhandle[9];
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(0, 2, 0));
vhandle[3] = mesh_.add_vertex(Mesh::Point(1, 0, 0));
vhandle[4] = mesh_.add_vertex(Mesh::Point(1, 1, 0));
vhandle[5] = mesh_.add_vertex(Mesh::Point(1, 2, 0));
vhandle[6] = mesh_.add_vertex(Mesh::Point(2, 0, 0));
vhandle[7] = mesh_.add_vertex(Mesh::Point(2, 1, 0));
vhandle[8] = mesh_.add_vertex(Mesh::Point(2, 2, 0));
// Add eight faces
std::vector<Mesh::VertexHandle> face_vhandles;
face_vhandles.push_back(vhandle[0]);
face_vhandles.push_back(vhandle[4]);
face_vhandles.push_back(vhandle[3]);
mesh_.add_face(face_vhandles);
face_vhandles.clear();
face_vhandles.push_back(vhandle[0]);
face_vhandles.push_back(vhandle[1]);
face_vhandles.push_back(vhandle[4]);
mesh_.add_face(face_vhandles);
face_vhandles.clear();
face_vhandles.push_back(vhandle[1]);
face_vhandles.push_back(vhandle[2]);
face_vhandles.push_back(vhandle[4]);
mesh_.add_face(face_vhandles);
face_vhandles.clear();
face_vhandles.push_back(vhandle[2]);
face_vhandles.push_back(vhandle[5]);
face_vhandles.push_back(vhandle[4]);
mesh_.add_face(face_vhandles);
face_vhandles.clear();
face_vhandles.push_back(vhandle[3]);
face_vhandles.push_back(vhandle[7]);
face_vhandles.push_back(vhandle[6]);
mesh_.add_face(face_vhandles);
face_vhandles.clear();
face_vhandles.push_back(vhandle[3]);
face_vhandles.push_back(vhandle[4]);
face_vhandles.push_back(vhandle[7]);
mesh_.add_face(face_vhandles);
face_vhandles.clear();
face_vhandles.push_back(vhandle[4]);
face_vhandles.push_back(vhandle[8]);
face_vhandles.push_back(vhandle[7]);
mesh_.add_face(face_vhandles);
face_vhandles.clear();
face_vhandles.push_back(vhandle[4]);
face_vhandles.push_back(vhandle[5]);
face_vhandles.push_back(vhandle[8]);
mesh_.add_face(face_vhandles);
// Test setup:
// 6 === 7 === 8
// | / | / |
// | / | / |
// | / | / |
// 3 === 4 === 5
// | / | \ |
// | / | \ |
// | / | \ |
// 0 === 1 === 2
// Initialize subdivider
OpenMesh::Subdivider::Uniform::ModifiedButterflyT<Mesh> butter;
// Check setup
EXPECT_EQ(9u, mesh_.n_vertices() ) << "Wrong number of vertices";
EXPECT_EQ(8u, mesh_.n_faces() ) << "Wrong number of faces";
// Execute 3 subdivision steps
butter.attach(mesh_);
butter( 3 );
butter.detach();
// Check setup
EXPECT_EQ(289u, mesh_.n_vertices() ) << "Wrong number of vertices after subdivision with loop";
EXPECT_EQ(512u, mesh_.n_faces() ) << "Wrong number of faces after subdivision with loop";
}
TEST_F(OpenMeshSubdividerUniform_Triangle, Modified_Butterfly_delete_vertex) {
mesh_.clear();
// Request status flags to use delete and garbage collection
mesh_.request_vertex_status();
mesh_.request_halfedge_status();
mesh_.request_edge_status();
mesh_.request_face_status();
// Add some vertices
Mesh::VertexHandle vhandle[9];
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(0, 2, 0));
vhandle[3] = mesh_.add_vertex(Mesh::Point(1, 0, 0));
vhandle[4] = mesh_.add_vertex(Mesh::Point(1, 1, 0));
vhandle[5] = mesh_.add_vertex(Mesh::Point(1, 2, 0));
vhandle[6] = mesh_.add_vertex(Mesh::Point(2, 0, 0));
vhandle[7] = mesh_.add_vertex(Mesh::Point(2, 1, 0));
vhandle[8] = mesh_.add_vertex(Mesh::Point(2, 2, 0));
// Add eight faces
std::vector<Mesh::VertexHandle> face_vhandles;
face_vhandles.push_back(vhandle[0]);
face_vhandles.push_back(vhandle[4]);
face_vhandles.push_back(vhandle[3]);
mesh_.add_face(face_vhandles);
face_vhandles.clear();
face_vhandles.push_back(vhandle[0]);
face_vhandles.push_back(vhandle[1]);
face_vhandles.push_back(vhandle[4]);
mesh_.add_face(face_vhandles);
face_vhandles.clear();
face_vhandles.push_back(vhandle[1]);
face_vhandles.push_back(vhandle[2]);
face_vhandles.push_back(vhandle[4]);
mesh_.add_face(face_vhandles);
face_vhandles.clear();
face_vhandles.push_back(vhandle[2]);
face_vhandles.push_back(vhandle[5]);
face_vhandles.push_back(vhandle[4]);
mesh_.add_face(face_vhandles);
face_vhandles.clear();
face_vhandles.push_back(vhandle[3]);
face_vhandles.push_back(vhandle[7]);
face_vhandles.push_back(vhandle[6]);
mesh_.add_face(face_vhandles);
face_vhandles.clear();
face_vhandles.push_back(vhandle[3]);
face_vhandles.push_back(vhandle[4]);
face_vhandles.push_back(vhandle[7]);
mesh_.add_face(face_vhandles);
face_vhandles.clear();
face_vhandles.push_back(vhandle[4]);
face_vhandles.push_back(vhandle[8]);
face_vhandles.push_back(vhandle[7]);
mesh_.add_face(face_vhandles);
face_vhandles.clear();
face_vhandles.push_back(vhandle[4]);
face_vhandles.push_back(vhandle[5]);
face_vhandles.push_back(vhandle[8]);
mesh_.add_face(face_vhandles);
// Test setup:
// 6 === 7 === 8
// | / | / |
// | / | / |
// | / | / |
// 3 === 4 === 5
// | / | \ |
// | / | \ |
// | / | \ |
// 0 === 1 === 2
// Delete one vertex
mesh_.delete_vertex(vhandle[1]);
mesh_.garbage_collection();
// Initialize subdivider
OpenMesh::Subdivider::Uniform::ModifiedButterflyT<Mesh> butter;
// Check setup
EXPECT_EQ(8u, mesh_.n_vertices() ) << "Wrong number of vertices";
EXPECT_EQ(6u, mesh_.n_faces() ) << "Wrong number of faces";
// Execute 3 subdivision steps
butter.attach(mesh_);
butter( 3 );
butter.detach();
// Check setup
EXPECT_EQ(225u, mesh_.n_vertices() ) << "Wrong number of vertices after subdivision with butter";
EXPECT_EQ(384u, mesh_.n_faces() ) << "Wrong number of faces after subdivision with butter";
}
}