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#ifndef __PATHTRACER_MESH__HPP__
#define __PATHTRACER_MESH__HPP__

#include "luminaire.hpp"
#include "material.hpp"

namespace Geometry { class TriMesh; class IndexedFaceSet; }

class mesh : public luminaire
{
public:
        //ctor
        mesh(void);
        mesh(const std::string&);
        ~mesh(void);

        //geometry
        const Geometry::TriMesh& get_trimesh(void) const;
        void set_trimesh(const Geometry::TriMesh&);
        const CGLA::Vec3f& triangle_normal(size_t i) const;

        //material
        const material* get_material(void) const;
        void set_material(const material*);

        //exitance (W/m2) (assuming diffuse emission)
        CGLA::Vec3f exitance(void) const;
        void set_exitance(const CGLA::Vec3f&);

        //sampling of mesh luminaire
        bool sample(const ray&, const hit_info&, CGLA::Vec3f& L, 
                CGLA::Vec3f& w) const;

protected:
        Geometry::TriMesh* msh_;
        std::vector<CGLA::Vec3f> triangle_normals_;
        Geometry::IndexedFaceSet* tangents_;
        const material* mat_;
        CGLA::Vec3f exitance_;
};

#endif


//02566 framework, Anders Wang Kristensen, awk@imm.dtu.dk, 2007