108 lines
3.5 KiB
C
108 lines
3.5 KiB
C
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#pragma once
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#include "obj_reader.h"
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#include <map>
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#include <set>
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#include <cgv/math/fvec.h>
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#include <cgv/media/lib_begin.h>
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namespace cgv {
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namespace media {
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namespace mesh {
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/** simple structure to describe a face */
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struct CGV_API face_info
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{
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/// degree of face
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unsigned degree;
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/// index into vertex index array
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unsigned first_vertex_index;
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/// index into texcoord index array or -1 if not specified
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int first_texcoord_index;
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/// index into normal index array or -1 if not specified
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int first_normal_index;
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/// index of group to which the face belongs
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int group_index;
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/// material index to which the face belongs
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int material_index;
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/// construct face info
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face_info(unsigned _nr = 0, unsigned _vi0 = 0, int _ti0 = -1, int _ni0 = -1, unsigned gi=-1, unsigned mi=-1);
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};
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/** simple structure to describe a group*/
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struct group_info
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{
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/// name of the group
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std::string name;
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/// parameters string
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std::string parameters;
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};
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/** implements the virtual interface of the obj_reader and stores all
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read information. The read information is automatically stored in
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binary form to accelerate the second loading of the same obj file. */
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template <typename T>
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class CGV_API obj_loader_generic : public obj_reader_generic<T>
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{
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public:
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// We need to repeat the typenames here, because gcc will not inherit them in templates
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typedef typename obj_reader_generic<T>::v3d_type v3d_type;
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typedef typename obj_reader_generic<T>::v2d_type v2d_type;
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typedef typename obj_reader_generic<T>::color_type color_type;
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std::vector<v3d_type> vertices;
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std::vector<v3d_type> normals;
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std::vector<v2d_type> texcoords;
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std::vector<color_type> colors;
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std::vector<unsigned> vertex_indices;
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std::vector<unsigned> normal_indices;
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std::vector<unsigned> texcoord_indices;
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std::vector<face_info> faces;
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std::vector<group_info> groups;
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std::vector<cgv::media::illum::obj_material> materials;
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protected:
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/**@name virtual interface*/
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//@{
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/// overide this function to process a vertex
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void process_vertex(const v3d_type& p);
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/// overide this function to process a texcoord
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void process_texcoord(const v2d_type& t);
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/// overide this function to process a normal
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void process_normal(const v3d_type& n);
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/// overide this function to process a color (this called for vc prefixes which is is not in the standard but for example used in pobj-files)
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void process_color(const color_type& c);
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/// overide this function to process a face
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void process_face(unsigned vcount, int *vertices,
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int *texcoords = 0, int *normals=0);
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/// overide this function to process a group given by name
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void process_group(const std::string& name, const std::string& parameters);
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/// process a material definition
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void process_material(const cgv::media::illum::obj_material& mtl, unsigned idx);
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//@}
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public:
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/// overloads reading to support binary file format
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bool read_obj(const std::string& file_name);
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/// read a binary version of an obj file
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bool read_obj_bin(const std::string& file_name);
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/// write the information from the last read obj file in binary format
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bool write_obj_bin(const std::string& file_name) const;
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/// use this after reading to show status information about the number of read entities
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void show_stats() const;
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/// prepare for reading another file
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void clear();
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};
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typedef obj_loader_generic<float> obj_loaderf;
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typedef obj_loader_generic<double> obj_loaderd;
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typedef obj_loader_generic<double> obj_loader;
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}
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}
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}
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#include <cgv/config/lib_end.h>
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