TriangleMeshPlyReaderDelegate.h

// This file is a part of the OpenSurgSim project.
// Copyright 2013, SimQuest Solutions Inc.
//
// 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.

#ifndef SURGSIM_DATASTRUCTURES_TRIANGLEMESHPLYREADERDELEGATE_H
#define SURGSIM_DATASTRUCTURES_TRIANGLEMESHPLYREADERDELEGATE_H

#include <array>
#include <memory>

#include "SurgSim/DataStructures/EmptyData.h"
#include "SurgSim/DataStructures/PlyReader.h"
#include "SurgSim/DataStructures/PlyReaderDelegate.h"

namespace SurgSim
{
namespace DataStructures
{

template <class M>
class TriangleMeshPlyReaderDelegate : public PlyReaderDelegate
{
public:

    typedef M MeshType;

    TriangleMeshPlyReaderDelegate();

    explicit TriangleMeshPlyReaderDelegate(std::shared_ptr<MeshType> mesh);

    std::shared_ptr<MeshType> getMesh();

    bool registerDelegate(PlyReader* reader) override;

    bool fileIsAcceptable(const PlyReader& reader) override;

    void* beginVertices(const std::string& elementName, size_t vertexCount);

    virtual void processVertex(const std::string& elementName);

    void endVertices(const std::string& elementName);

    void* beginFaces(const std::string& elementName, size_t faceCount);

    void processFace(const std::string& elementName);

    void endFaces(const std::string& elementName);

    void* beginEdges(const std::string& elementName, size_t edgeCount);

    void processEdge(const std::string& elementName);

    void endEdges(const std::string& elementName);

    void endFile();

protected:

    bool hasTextureCoordinates();

    struct VertexData
    {
        double x = std::numeric_limits<double>::signaling_NaN();
        double y = std::numeric_limits<double>::signaling_NaN();
        double z = std::numeric_limits<double>::signaling_NaN();
        int64_t overrun1 = -1; 
        double s = std::numeric_limits<double>::signaling_NaN();
        double t = std::numeric_limits<double>::signaling_NaN();
        int64_t overrun2 = -1; 
    } m_vertexData;

    struct ListData
    {
        unsigned int count = 0;
        unsigned int* indices = nullptr;
        int64_t overrun = -1; 
    } m_listData;

    std::shared_ptr<MeshType> m_mesh;

    // Statically allocated index array to receive data for the faces
    std::array<size_t, 3> m_face;
    std::array<size_t, 2> m_edge = {};

private:
    bool m_hasTextureCoordinates;

    bool m_hasFaces;

    bool m_hasEdges;
};


};
};

#include "SurgSim/DataStructures/TriangleMeshPlyReaderDelegate-inl.h"

#endif