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mesh_cleanup_test.cc
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// Copyright 2016 The Draco Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
//
#include "draco/mesh/mesh_cleanup.h"
#include "draco/core/draco_test_base.h"
#include "draco/core/draco_test_utils.h"
#include "draco/core/vector_d.h"
#include "draco/mesh/triangle_soup_mesh_builder.h"
namespace draco {
class MeshCleanupTest : public ::testing::Test {};
TEST_F(MeshCleanupTest, TestDegneratedFaces) {
// This test verifies that the mesh cleanup tools removes degenerated faces.
TriangleSoupMeshBuilder mb;
mb.Start(2);
const int pos_att_id =
mb.AddAttribute(GeometryAttribute::POSITION, 3, DT_FLOAT32);
// clang-format off
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(0),
Vector3f(0.f, 0.f, 0.f).data(),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(0.f, 1.f, 0.f).data());
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(1),
Vector3f(0.f, 1.f, 0.f).data(),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(1.f, 0.f, 0.f).data());
// clang-format on
std::unique_ptr<Mesh> mesh = mb.Finalize();
ASSERT_NE(mesh, nullptr) << "Failed to build the test mesh.";
ASSERT_EQ(mesh->num_faces(), 2) << "Wrong number of faces in the input mesh.";
MeshCleanupOptions cleanup_options;
DRACO_ASSERT_OK(MeshCleanup::Cleanup(mesh.get(), cleanup_options));
ASSERT_EQ(mesh->num_faces(), 1) << "Failed to remove degenerated faces.";
}
TEST_F(MeshCleanupTest, TestDegneratedFacesAndIsolatedVertices) {
// This test verifies that the mesh cleanup tools removes degenerated faces
// and isolated vertices.
TriangleSoupMeshBuilder mb;
mb.Start(2);
const int pos_att_id =
mb.AddAttribute(GeometryAttribute::POSITION, 3, DT_FLOAT32);
// Dummy integer attribute for which we do not expect the number of entries
// to change after the degnerate face and isolated vertex are removed.
const int int_att_id =
mb.AddAttribute(GeometryAttribute::GENERIC, 2, DT_INT32);
// clang-format off
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(0),
Vector3f(0.f, 0.f, 0.f).data(),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(0.f, 1.f, 0.f).data());
mb.SetAttributeValuesForFace(int_att_id, FaceIndex(0),
VectorD<int32_t, 2>(0, 0).data(),
VectorD<int32_t, 2>(0, 1).data(),
VectorD<int32_t, 2>(0, 2).data());
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(1),
Vector3f(10.f, 1.f, 0.f).data(),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(10.f, 1.f, 0.f).data());
mb.SetAttributeValuesForFace(int_att_id, FaceIndex(1),
VectorD<int32_t, 2>(0, 0).data(),
VectorD<int32_t, 2>(0, 1).data(),
VectorD<int32_t, 2>(0, 2).data());
// clang-format on
std::unique_ptr<Mesh> mesh = mb.Finalize();
ASSERT_NE(mesh, nullptr) << "Failed to build the test mesh.";
ASSERT_EQ(mesh->num_faces(), 2) << "Wrong number of faces in the input mesh.";
ASSERT_EQ(mesh->num_points(), 5)
<< "Wrong number of point ids in the input mesh.";
ASSERT_EQ(mesh->attribute(int_att_id)->size(), 3);
const MeshCleanupOptions cleanup_options;
DRACO_ASSERT_OK(MeshCleanup::Cleanup(mesh.get(), cleanup_options));
ASSERT_EQ(mesh->num_faces(), 1) << "Failed to remove degenerated faces.";
ASSERT_EQ(mesh->num_points(), 3)
<< "Failed to remove isolated attribute indices.";
ASSERT_EQ(mesh->attribute(int_att_id)->size(), 3);
}
TEST_F(MeshCleanupTest, TestAttributes) {
TriangleSoupMeshBuilder mb;
mb.Start(2);
const int pos_att_id =
mb.AddAttribute(GeometryAttribute::POSITION, 3, DT_FLOAT32);
const int generic_att_id =
mb.AddAttribute(GeometryAttribute::GENERIC, 2, DT_FLOAT32);
// clang-format off
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(0),
Vector3f(0.f, 0.f, 0.f).data(),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(0.f, 1.f, 0.f).data());
mb.SetAttributeValuesForFace(generic_att_id, FaceIndex(0),
Vector2f(0.f, 0.f).data(),
Vector2f(0.f, 0.f).data(),
Vector2f(0.f, 0.f).data());
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(1),
Vector3f(10.f, 1.f, 0.f).data(),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(10.f, 1.f, 0.f).data());
mb.SetAttributeValuesForFace(generic_att_id, FaceIndex(1),
Vector2f(1.f, 0.f).data(),
Vector2f(1.f, 0.f).data(),
Vector2f(1.f, 0.f).data());
// clang-format on
std::unique_ptr<Mesh> mesh = mb.Finalize();
ASSERT_NE(mesh, nullptr) << "Failed to build the test mesh.";
ASSERT_EQ(mesh->num_faces(), 2) << "Wrong number of faces in the input mesh.";
ASSERT_EQ(mesh->num_points(), 5)
<< "Wrong number of point ids in the input mesh.";
ASSERT_EQ(mesh->attribute(1)->size(), 2u)
<< "Wrong number of generic attribute entries.";
const MeshCleanupOptions cleanup_options;
DRACO_ASSERT_OK(MeshCleanup::Cleanup(mesh.get(), cleanup_options));
ASSERT_EQ(mesh->num_faces(), 1) << "Failed to remove degenerated faces.";
ASSERT_EQ(mesh->num_points(), 3)
<< "Failed to remove isolated attribute indices.";
ASSERT_EQ(mesh->attribute(0)->size(), 3u)
<< "Wrong number of unique positions after cleanup.";
ASSERT_EQ(mesh->attribute(1)->size(), 1u)
<< "Wrong number of generic attribute entries after cleanup.";
}
TEST_F(MeshCleanupTest, TestDuplicateFaces) {
TriangleSoupMeshBuilder mb;
mb.Start(5);
const int pos_att_id =
mb.AddAttribute(GeometryAttribute::POSITION, 3, DT_FLOAT32);
// Five faces where only two are unique.
// clang-format off
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(0),
Vector3f(0.f, 0.f, 0.f).data(),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(0.f, 1.f, 0.f).data());
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(1),
Vector3f(0.f, 0.f, 0.f).data(),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(0.f, 1.f, 0.f).data());
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(2),
Vector3f(0.f, 0.f, 0.f).data(),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(0.f, 1.f, 1.f).data());
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(3),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(0.f, 1.f, 0.f).data(),
Vector3f(0.f, 0.f, 0.f).data());
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(4),
Vector3f(0.f, 0.f, 0.f).data(),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(0.f, 1.f, 1.f).data());
// clang-format on
std::unique_ptr<Mesh> mesh = mb.Finalize();
ASSERT_NE(mesh, nullptr);
ASSERT_EQ(mesh->num_faces(), 5);
const MeshCleanupOptions cleanup_options;
DRACO_ASSERT_OK(MeshCleanup::Cleanup(mesh.get(), cleanup_options));
ASSERT_EQ(mesh->num_faces(), 2);
}
} // namespace draco