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triangle_soup_mesh_builder_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/triangle_soup_mesh_builder.h"
#include "draco/core/draco_test_base.h"
#include "draco/core/vector_d.h"
namespace draco {
class TriangleSoupMeshBuilderTest : public ::testing::Test {};
TEST_F(TriangleSoupMeshBuilderTest, CubeTest) {
// This tests, verifies that the mesh builder constructs a valid cube out
// of the provided triangle soup data.
TriangleSoupMeshBuilder mb;
mb.Start(12);
#ifdef DRACO_TRANSCODER_SUPPORTED
mb.SetName("Cube");
#endif
const int pos_att_id =
mb.AddAttribute(GeometryAttribute::POSITION, 3, DT_FLOAT32);
// clang-format off
// Front face.
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, 1.f, 0.f).data());
// Back face.
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(2),
Vector3f(0.f, 1.f, 1.f).data(),
Vector3f(1.f, 0.f, 1.f).data(),
Vector3f(0.f, 0.f, 1.f).data());
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(3),
Vector3f(1.f, 1.f, 1.f).data(),
Vector3f(1.f, 0.f, 1.f).data(),
Vector3f(0.f, 1.f, 1.f).data());
// Top face.
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(4),
Vector3f(0.f, 1.f, 0.f).data(),
Vector3f(1.f, 1.f, 0.f).data(),
Vector3f(0.f, 1.f, 1.f).data());
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(5),
Vector3f(0.f, 1.f, 1.f).data(),
Vector3f(1.f, 1.f, 0.f).data(),
Vector3f(1.f, 1.f, 1.f).data());
// Bottom face.
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(6),
Vector3f(0.f, 0.f, 1.f).data(),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(0.f, 0.f, 0.f).data());
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(7),
Vector3f(1.f, 0.f, 1.f).data(),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(0.f, 0.f, 1.f).data());
// Right face.
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(8),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(1.f, 0.f, 1.f).data(),
Vector3f(1.f, 1.f, 0.f).data());
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(9),
Vector3f(1.f, 1.f, 0.f).data(),
Vector3f(1.f, 0.f, 1.f).data(),
Vector3f(1.f, 1.f, 1.f).data());
// Left face.
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(10),
Vector3f(0.f, 1.f, 0.f).data(),
Vector3f(0.f, 0.f, 1.f).data(),
Vector3f(0.f, 0.f, 0.f).data());
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(11),
Vector3f(0.f, 1.f, 1.f).data(),
Vector3f(0.f, 0.f, 1.f).data(),
Vector3f(0.f, 1.f, 0.f).data());
// clang-format on
std::unique_ptr<Mesh> mesh = mb.Finalize();
ASSERT_NE(mesh, nullptr) << "Failed to build the cube mesh.";
#ifdef DRACO_TRANSCODER_SUPPORTED
EXPECT_EQ(mesh->GetName(), "Cube");
#endif
EXPECT_EQ(mesh->num_points(), 8) << "Unexpected number of vertices.";
EXPECT_EQ(mesh->num_faces(), 12) << "Unexpected number of faces.";
}
TEST_F(TriangleSoupMeshBuilderTest, TestPerFaceAttribs) {
// This tests, verifies that the mesh builder constructs a valid cube with
// per face Boolean attributes.
TriangleSoupMeshBuilder mb;
mb.Start(12);
const int pos_att_id =
mb.AddAttribute(GeometryAttribute::POSITION, 3, DT_FLOAT32);
const int gen_att_id =
mb.AddAttribute(GeometryAttribute::GENERIC, 1, DT_BOOL);
uint8_t bool_true = 1;
uint8_t bool_false = 0;
// clang-format off
// Front face.
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.SetPerFaceAttributeValueForFace(gen_att_id, FaceIndex(0), &bool_false);
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, 1.f, 0.f).data());
mb.SetPerFaceAttributeValueForFace(gen_att_id, FaceIndex(1), &bool_true);
// Back face.
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(2),
Vector3f(0.f, 1.f, 1.f).data(),
Vector3f(1.f, 0.f, 1.f).data(),
Vector3f(0.f, 0.f, 1.f).data());
mb.SetPerFaceAttributeValueForFace(gen_att_id, FaceIndex(2), &bool_true);
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(3),
Vector3f(1.f, 1.f, 1.f).data(),
Vector3f(1.f, 0.f, 1.f).data(),
Vector3f(0.f, 1.f, 1.f).data());
mb.SetPerFaceAttributeValueForFace(gen_att_id, FaceIndex(3), &bool_true);
// Top face.
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(4),
Vector3f(0.f, 1.f, 0.f).data(),
Vector3f(1.f, 1.f, 0.f).data(),
Vector3f(0.f, 1.f, 1.f).data());
mb.SetPerFaceAttributeValueForFace(gen_att_id, FaceIndex(4), &bool_false);;
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(5),
Vector3f(0.f, 1.f, 1.f).data(),
Vector3f(1.f, 1.f, 0.f).data(),
Vector3f(1.f, 1.f, 1.f).data());
mb.SetPerFaceAttributeValueForFace(gen_att_id, FaceIndex(5), &bool_false);
// Bottom face.
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(6),
Vector3f(0.f, 0.f, 1.f).data(),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(0.f, 0.f, 0.f).data());
mb.SetPerFaceAttributeValueForFace(gen_att_id, FaceIndex(6), &bool_true);
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(7),
Vector3f(1.f, 0.f, 1.f).data(),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(0.f, 0.f, 1.f).data());
mb.SetPerFaceAttributeValueForFace(gen_att_id, FaceIndex(7), &bool_true);
// Right face.
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(8),
Vector3f(1.f, 0.f, 0.f).data(),
Vector3f(1.f, 0.f, 1.f).data(),
Vector3f(1.f, 1.f, 0.f).data());
mb.SetPerFaceAttributeValueForFace(gen_att_id, FaceIndex(8), &bool_false);
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(9),
Vector3f(1.f, 1.f, 0.f).data(),
Vector3f(1.f, 0.f, 1.f).data(),
Vector3f(1.f, 1.f, 1.f).data());
mb.SetPerFaceAttributeValueForFace(gen_att_id, FaceIndex(9), &bool_true);
// Left face.
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(10),
Vector3f(0.f, 1.f, 0.f).data(),
Vector3f(0.f, 0.f, 1.f).data(),
Vector3f(0.f, 0.f, 0.f).data());
mb.SetPerFaceAttributeValueForFace(gen_att_id, FaceIndex(10), &bool_true);
mb.SetAttributeValuesForFace(pos_att_id, FaceIndex(11),
Vector3f(0.f, 1.f, 1.f).data(),
Vector3f(0.f, 0.f, 1.f).data(),
Vector3f(0.f, 1.f, 0.f).data());
mb.SetPerFaceAttributeValueForFace(gen_att_id, FaceIndex(11), &bool_false);
// clang-format on
std::unique_ptr<Mesh> mesh = mb.Finalize();
ASSERT_NE(mesh, nullptr) << "Failed to build the cube mesh.";
#ifdef DRACO_TRANSCODER_SUPPORTED
EXPECT_TRUE(mesh->GetName().empty());
#endif
EXPECT_EQ(mesh->num_faces(), 12) << "Unexpected number of faces.";
EXPECT_EQ(mesh->GetAttributeElementType(gen_att_id), MESH_FACE_ATTRIBUTE)
<< "Unexpected attribute element type.";
}
} // namespace draco