WavefrontFile.hpp

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#pragma once
#include <vector>
#include "File.hpp"
#include "BoundingBoxSet.hpp"
#include <unordered_map>
#include "Material.hpp"
 
namespace small3d {
 
  class WavefrontFile : public File {
 
  private:
    std::string materialFile = "";
    Material material;
 
    int getTokens(const std::string& input, const char sep,
      std::vector<std::string>& tokens);
    
    // Does this file only contain triangles?
    bool onlyTriangles = true;
 
    // Data read from .obj file
    std::vector<std::vector<float> > vertices;
    std::vector<std::vector<uint32_t> > facesVertexIndices;
    std::vector<std::vector<float> > normals;
    std::vector<std::vector<uint32_t> > facesNormalIndices;
    std::vector<std::vector<float> > textureCoords;
    std::vector<std::vector<uint32_t> > textureCoordsIndices;
    std::vector<std::string> objectNames;
    std::unordered_map<std::string, size_t> objectStartFaceIdx;
 
    void loadVertexData(std::vector<float>& vertexData);
    void loadIndexData(std::vector<uint16_t>& indexData);
    void loadNormalsData(std::vector<float>& normalsData, const std::vector<float>& vertexData);
    void loadTextureCoordsData(std::vector<float>& textureCoordsData, const std::vector<float>& vertexData);
 
    void loadMaterial(const std::string& filePath, const std::string& name);
 
    // Make sure that no texture coordinate information is lost when the data
    // buffers get created (vertexData, indexData, normalsData and
    // textureCoordsData) by realigning the data vectors, in order to ensure
    // unique vertex - texture coordinates pairs.
    void correctDataVectors();
 
    WavefrontFile(); // No default constructor
 
    // Forbid moving and copying
    WavefrontFile(WavefrontFile const&) = delete;
    void operator=(WavefrontFile const&) = delete;
    WavefrontFile(WavefrontFile&&) = delete;
    void operator=(WavefrontFile&&) = delete;
 
  public:
    explicit WavefrontFile(const std::string& filePath);
 
    void load(Model& model, const std::string& meshName) override;
 
    std::vector<std::string> getMeshNames() override;
 
  };
}