mesh.hpp

#pragma once

#include <string>
#include <vector>

#include "geometry.hpp"

namespace rt{

class Mesh : public Geometry{
public:
    enum DataType{
        Triangles = 3,
        Quads = 4
    };

    Mesh();
    ~Mesh();

    void add_faces(double *vertex, unsigned int *index, DataType data_type);

    static Mesh *from_wavefront(const std::string & filename);

    virtual vector uv(const element &) const;

    virtual std::vector<hit> hits(const euclidian &e) const;

    friend std::ostream & operator<<(std::ostream & stream, const Mesh & mesh);

private:
    void _compute_bounding_sphere();

    struct vertex_t{
        union{
            double c[3];
            struct{
                int x, y, z;
            }data;
        };
    };

    struct face_t{
        vector vertex[3];
        vector normal[3];

        double hit(const euclidian &e) const;
        void compute_normals();
    };

    std::vector<face_t> _faces;
    double _ray;
};

std::ostream & operator<<(std::ostream & stream, const Mesh & mesh);

}