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// Copyright 2017 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 <fstream>
#include <sstream>
#include "draco/core/draco_test_base.h"
#include "draco/core/draco_test_utils.h"
#include "draco/io/obj_decoder.h"
#include "draco/io/obj_encoder.h"
namespace draco {
class ObjEncoderTest : public ::testing::Test {
protected:
void CompareMeshes(const Mesh *mesh0, const Mesh *mesh1) {
ASSERT_EQ(mesh0->num_faces(), mesh1->num_faces());
ASSERT_EQ(mesh0->num_attributes(), mesh1->num_attributes());
for (size_t att_id = 0; att_id < mesh0->num_attributes(); ++att_id) {
ASSERT_EQ(mesh0->attribute(att_id)->size(),
mesh1->attribute(att_id)->size());
}
}
// Encode a mesh using the ObjEncoder and then decode to verify the encoding.
std::unique_ptr<Mesh> EncodeAndDecodeMesh(const Mesh *mesh) {
EncoderBuffer encoder_buffer;
ObjEncoder encoder;
if (!encoder.EncodeToBuffer(*mesh, &encoder_buffer))
return nullptr;
DecoderBuffer decoder_buffer;
decoder_buffer.Init(encoder_buffer.data(), encoder_buffer.size());
std::unique_ptr<Mesh> decoded_mesh(new Mesh());
ObjDecoder decoder;
decoder.set_use_metadata(true);
if (!decoder.DecodeFromBuffer(&decoder_buffer, decoded_mesh.get()).ok())
return nullptr;
return decoded_mesh;
}
void test_encoding(const std::string &file_name) {
const std::unique_ptr<Mesh> mesh(ReadMeshFromTestFile(file_name, true));
ASSERT_NE(mesh, nullptr) << "Failed to load test model " << file_name;
ASSERT_GT(mesh->num_faces(), 0);
const std::unique_ptr<Mesh> decoded_mesh = EncodeAndDecodeMesh(mesh.get());
CompareMeshes(mesh.get(), decoded_mesh.get());
}
};
TEST_F(ObjEncoderTest, HasSubObject) { test_encoding("cube_att_sub_o.obj"); }
TEST_F(ObjEncoderTest, HasMaterial) {
const std::unique_ptr<Mesh> mesh0(ReadMeshFromTestFile("mat_test.obj", true));
ASSERT_NE(mesh0, nullptr);
const std::unique_ptr<Mesh> mesh1 = EncodeAndDecodeMesh(mesh0.get());
ASSERT_NE(mesh1, nullptr);
ASSERT_EQ(mesh0->num_faces(), mesh1->num_faces());
ASSERT_EQ(mesh0->num_attributes(), mesh1->num_attributes());
// Position attribute should be the same.
ASSERT_EQ(mesh0->attribute(0)->size(), mesh1->attribute(0)->size());
// Since |mesh1| is decoded from buffer, it has not material file. So the
// size of material attribute is the number of materials used in the obj
// file which is 7. The size of material attribute of |mesh0| decoded from
// the obj file will be the number of materials defined in the .mtl file.
ASSERT_EQ(mesh0->attribute(1)->size(), 29);
ASSERT_EQ(mesh1->attribute(1)->size(), 7);
}
TEST_F(ObjEncoderTest, TestObjEncodingAll) {
// Test decoded mesh from encoded obj file stays the same.
test_encoding("bunny_norm.obj");
test_encoding("cube_att.obj");
test_encoding("cube_att_partial.obj");
test_encoding("cube_quads.obj");
test_encoding("cube_subd.obj");
test_encoding("extra_vertex.obj");
test_encoding("multiple_isolated_triangles.obj");
test_encoding("multiple_tetrahedrons.obj");
test_encoding("one_face_123.obj");
test_encoding("one_face_312.obj");
test_encoding("one_face_321.obj");
test_encoding("sphere.obj");
test_encoding("test_nm.obj");
test_encoding("test_nm_trans.obj");
test_encoding("test_sphere.obj");
test_encoding("three_faces_123.obj");
test_encoding("three_faces_312.obj");
test_encoding("two_faces_123.obj");
test_encoding("two_faces_312.obj");
}
} // namespace draco
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