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#ifndef OBJ_LOADER_H_INCLUDED
#define OBJ_LOADER_H_INCLUDED
#include <filesystem>
#include <glm/glm.hpp>
#include <string>
#include <vector>
struct OBJIndex {
unsigned int vertexIndex;
unsigned int uvIndex;
unsigned int normalIndex;
bool
operator<(const OBJIndex & r) const
{
return vertexIndex < r.vertexIndex;
}
};
class IndexedModel {
public:
std::vector<glm::vec3> positions;
std::vector<glm::vec2> texCoords;
std::vector<glm::vec3> normals;
std::vector<unsigned int> indices;
void CalcNormals();
};
class OBJModel {
public:
std::vector<OBJIndex> OBJIndices;
std::vector<glm::vec3> vertices;
std::vector<glm::vec2> uvs;
std::vector<glm::vec3> normals;
bool hasUVs;
bool hasNormals;
explicit OBJModel(const std::filesystem::path & fileName);
IndexedModel ToIndexedModel();
private:
unsigned int FindLastVertexIndex(
const std::vector<OBJIndex *> & indexLookup, const OBJIndex * currentIndex, const IndexedModel & result);
void CreateOBJFace(const std::string & line);
static glm::vec2 ParseOBJVec2(const std::string & line);
static glm::vec3 ParseOBJVec3(const std::string & line);
static OBJIndex ParseOBJIndex(const std::string & token, bool * hasUVs, bool * hasNormals);
};
#endif // OBJ_LOADER_H_INCLUDED
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