58 lines
1.3 KiB
C++
58 lines
1.3 KiB
C++
#include "ObjParser.hpp"
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#include <sstream>
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#include <cctype>
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ObjParser::ObjParser(const std::string& path)
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: path(path)
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{}
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Mesh ObjParser::parse() {
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std::ifstream handle(path);
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Mesh output;
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if(!handle.is_open())
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throw std::runtime_error(std::string("Cannot open the file ") + path);
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for(std::string line; std::getline(handle, line); ) {
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std::istringstream lineStream(strip(line));
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char type;
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lineStream >> type;
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if(type == 'v') { // vertice
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double x, y, z;
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lineStream >> x >> y >> z;
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output.add_vertice(Point(x, y, z));
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}
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else if(type == 'f') {
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int v1, v2, v3;
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lineStream >> v1 >> v2 >> v3;
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output.add_face(Face(v1 - 1, v2 - 1, v3 - 1));
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}
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else {
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throw BadObj(path);
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}
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}
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output.normalize_center(false);
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return output;
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}
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std::string ObjParser::strip(const std::string& str) {
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size_t fPos, lPos;
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for(fPos=0; fPos < str.size(); ++fPos) {
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if(!isspace(str[fPos]))
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break;
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}
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if(fPos == str.size())
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return "";
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for(lPos=str.size() - 1; lPos > 0; --lPos) {
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if(!isspace(str[lPos]))
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break;
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}
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return str.substr(fPos, lPos - fPos + 1);
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}
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