{"id":24418,"date":"2022-12-02T21:26:24","date_gmt":"2022-12-02T15:56:24","guid":{"rendered":"https:\/\/jassweb.com\/solved\/solved-loading-obj-file-using-c-and-opengl-closed\/"},"modified":"2022-12-02T21:26:24","modified_gmt":"2022-12-02T15:56:24","slug":"solved-loading-obj-file-using-c-and-opengl-closed","status":"publish","type":"post","link":"https:\/\/jassweb.com\/solved\/solved-loading-obj-file-using-c-and-opengl-closed\/","title":{"rendered":"[Solved] Loading .obj file using c++ and opengl [closed]"},"content":{"rendered":"

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Actually there are many solutions if you search in Google. Here is one simple solution as below.<\/p>\n

First define one model containing face and vertex info:<\/p>\n

class obj3dmodel\n{\n   struct vertex{\n        double x;\n        double y;\n        double z;\n   };\n   struct face{\n         unsigned int v1,v2,v3;\n   };\n   std::vector<vertex> vetexes;\n   std::vector<face> faces;\n\npublic:\n  void readfile(const char* filename);\n  void draw();\n};\n<\/code><\/pre>\n
Then read file in readfile():<\/p>\n
void obj3dmodel::readfile(const char *filename) \n{\n   string s;\n   ifstream fin(filename);\n   if(!fin)\n         return;\n   while(fin>>s)\n   {\n         switch(*s.c_str())\n         {\n         case 'v':\n              {\n                    vertex v;\n                    fin>>v.x>>v.y>>v.z;\n                    this->vetexes.push_back(v);\n              }\n              break;            \n         case 'f':\n              {\n                    face f;\n                    fin>>f.v1>>f.v2>>f.v3;\n                    faces.push_back(f);\n              }\n              break;\n        }\n   }     \n}\n<\/code><\/pre>\n
Now you could use vertex and face information to do draw():<\/p>\n
void obj3dmodel::draw()\n{\n   glBegin(GL_TRIANGLES);\n   for(int i=0;i<faces.size();i++)\n   {                         \n      vertex v1= vetexes[faces[i].v1-1];\n      vertex v2=vetexes[faces[i].v2-1];\n      vertex v3=vetexes[faces[i].v3-1];\n\n      glVertex3f(v1.x,v1.y,v1.z);\n      glVertex3f(v2.x,v2.y,v2.z);\n      glVertex3f(v3.x,v3.y,v3.z);\n   }\n   glEnd(GL_TRIANGLES);\n }\n<\/code><\/pre>\n<\/p><\/div>\n
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solved Loading .obj file using c++ and opengl [closed] <\/p>\n","protected":false},"excerpt":{"rendered":"
[ad_1] Actually there are many solutions if you search in Google. Here is one simple solution as below. First define one model containing face and vertex info: class obj3dmodel { struct vertex{ double x; double y; double z; }; struct face{ unsigned int v1,v2,v3; }; std::vector<vertex> vetexes; std::vector<face> faces; public: void readfile(const char* filename); void … Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[320],"tags":[1999,324,1082,380],"class_list":["post-24418","post","type-post","status-publish","format-standard","hentry","category-solved","tag-3d","tag-c","tag-opengl","tag-parsing"],"yoast_head":"\n[Solved] Loading .obj file using c++ and opengl [closed] - JassWeb<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/jassweb.com\/solved\/solved-loading-obj-file-using-c-and-opengl-closed\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"[Solved] Loading .obj file using c++ and opengl [closed] - JassWeb\" \/>\n<meta property=\"og:description\" content=\"[ad_1] Actually there are many solutions if you search in Google. Here is one simple solution as below. First define one model containing face and vertex info: class obj3dmodel { struct vertex{ double x; double y; double z; }; struct face{ unsigned int v1,v2,v3; }; std::vector<vertex> vetexes; std::vector<face> faces; public: void readfile(const char* filename); void ... 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Here is one simple solution as below. First define one model containing face and vertex info: class obj3dmodel { struct vertex{ double x; double y; double z; }; struct face{ unsigned int v1,v2,v3; }; std::vector<vertex> vetexes; std::vector<face> faces; public: void readfile(const char* filename); void ... 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