mirror of
https://github.com/TheRedShip/RT_GPU.git
synced 2025-09-27 10:48:34 +02:00
281 lines
7.8 KiB
C++
281 lines
7.8 KiB
C++
/* ************************************************************************** */
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/* */
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/* ::: :::::::: */
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/* SceneParser.cpp :+: :+: :+: */
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/* +:+ +:+ +:+ */
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/* By: ycontre <ycontre@student.42.fr> +#+ +:+ +#+ */
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/* +#+#+#+#+#+ +#+ */
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/* Created: 2024/12/26 21:43:51 by TheRed #+# #+# */
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/* Updated: 2025/01/15 19:52:51 by ycontre ### ########.fr */
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/* */
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/* ************************************************************************** */
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#include "SceneParser.hpp"
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SceneParser::SceneParser(Scene *scene) : _scene(scene)
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{
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object_parsers["sp"] = [](std::stringstream &ss) -> Object * { return (new Sphere(ss)); };
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object_parsers["pl"] = [](std::stringstream &ss) -> Object * { return (new Plane(ss)); };
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object_parsers["qu"] = [](std::stringstream &ss) -> Object * { return (new Quad(ss)); };
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object_parsers["tr"] = [](std::stringstream &ss) -> Object * { return (new Triangle(ss)); };
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object_parsers["cu"] = [](std::stringstream &ss) -> Object * { return (new Cube(ss)); };
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object_parsers["po"] = [](std::stringstream &ss) -> Object * { return (new Portal(ss)); };
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object_parsers["cy"] = [](std::stringstream &ss) -> Object * { return (new Cylinder(ss)); };
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}
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void SceneParser::parseMaterial(std::stringstream &line)
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{
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float r,g,b;
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float emission;
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float rough_refrac;
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float metallic;
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std::string type;
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Material *mat;
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if (!(line >> r >> g >> b >> emission >> rough_refrac >> metallic))
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throw std::runtime_error("Material: Missing material properties");
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if (!(line >> type))
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type = "LAM";
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mat = new Material;
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mat->color = glm::vec3(r / 255.0f, g / 255.0f, b / 255.0f);
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mat->emission = emission;
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mat->roughness = rough_refrac;
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mat->metallic = metallic;
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mat->refraction = rough_refrac;
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mat->type = 0;
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if (type == "LAM")
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mat->type = 0;
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else if (type == "DIE")
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mat->type = 1;
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_scene->addMaterial(mat);
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}
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void SceneParser::parseCamera(std::stringstream &line)
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{
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float x,y,z;
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float yaw, pitch;
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float aperture, focus, fov;
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int bounce;
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if (!(line >> x >> y >> z))
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throw std::runtime_error("Camera: Missing camera properties");
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if (!(line >> yaw >> pitch))
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{
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yaw = 0;
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pitch = -90;
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}
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if (!(line >> aperture >> focus >> fov))
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{
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aperture = 0.0;
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focus = 1.0;
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fov = 90.0f;
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}
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if (!(line >> bounce))
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bounce = 5;
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_scene->getCamera()->setPosition(glm::vec3(x, y, z));
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_scene->getCamera()->setDirection(yaw, pitch);
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_scene->getCamera()->updateCameraVectors();
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_scene->getCamera()->setDOV(aperture, focus);
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_scene->getCamera()->setFov(fov);
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_scene->getCamera()->setBounce(bounce);
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}
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glm::vec3 SceneParser::getVertex(std::stringstream &line)
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{
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glm::vec3 res;
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if(!(line >> res.x >> res.y >> res.z))
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throw std::runtime_error("syntax error in obj file while parsing vertex");
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return(res);
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}
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long int SceneParser::getVertexIndex(std::stringstream &line, size_t size)
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{
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long int index;
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if(!(line >> index))
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throw std::runtime_error("syntax error in obj file while parsing face");
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if((size_t)index > size || index == 0 || (index < 0 && (size_t)(-index) > size))
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throw std::runtime_error("obj file error, invalid vertex index");
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if(index < 0)
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index = size - index;
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return(index - 1);
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}
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Triangle *SceneParser::getFace(std::stringstream &line, std::vector<glm::vec3> &vertices, int mat)
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{
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glm::vec3 triangle[3];
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triangle[0] = vertices[getVertexIndex(line, vertices.size())];
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triangle[1] = vertices[getVertexIndex(line, vertices.size())];
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triangle[2] = vertices[getVertexIndex(line, vertices.size())];
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return (new Triangle(triangle[0], triangle[1], triangle[2], mat));
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}
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void SceneParser::parseMtl(std::stringstream &input_line, std::map<std::string, int> &materials)
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{
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std::string filename;
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std::ifstream file;
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std::string matName;
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std::string identifier;
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std::string line;
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Material *mat;
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input_line >> filename;
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file.open(filename);
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mat = 0;
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if(!file.is_open())
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throw std::runtime_error("OBJ : could not open material file");
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while(getline(file, line))
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{
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if (line.empty() || line[0] == '#')
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continue;
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std::stringstream lineStream(line);
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lineStream >> identifier;
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if(identifier == "newmtl")
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{
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if(mat)
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{
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_scene->addMaterial(mat);
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materials[matName] = _scene->getMaterialData().size() - 1;
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}
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lineStream >> matName;
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if(matName.empty())
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throw std::runtime_error("OBJ: syntax error in material file, missing material name");
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mat = new Material;
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bzero(mat, sizeof(Material));
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mat->metallic = 1.0f;
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continue;
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}
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if(!mat)
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throw std::runtime_error("OBJ: error in material file, material name not defined");
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if(identifier == "Kd")
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{
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if(!(lineStream >> mat->color.x >> mat->color.y >> mat->color.z))
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throw std::runtime_error("OBJ: syntax error while getting material color");
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}
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else if(identifier == "Ns")
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{
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if(!(lineStream >> mat->roughness) || mat->roughness > 1000 || mat->roughness < 0)
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throw std::runtime_error("OBJ: syntax error while getting material softness");
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mat->roughness /= 1000;
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}
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else if(identifier == "Ke")
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{
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float x, y, z;
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if(!(lineStream >> x >> y >> z))
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throw std::runtime_error("OBJ: syntax error while getting material emission");
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mat->emission = (x + y + z) / 3;
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}
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else if(identifier == "Ni")
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{
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if(!(lineStream >> mat->refraction))
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throw std::runtime_error("OBJ: syntax error while getting material refraction");
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}
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else
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std::cerr << "unsupported material setting : " << identifier << std::endl;
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}
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if(mat)
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{
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_scene->addMaterial(mat);
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materials[matName] = _scene->getMaterialData().size() - 1;
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}
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}
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void SceneParser::parseObj(std::stringstream &objInfo)
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{
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std::vector<glm::vec3> vertices;
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std::string filename;
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std::map<std::string, int> matNames;
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std::string line;
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std::string identifier;
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std::ifstream file;
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int curMat;
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objInfo >> filename;
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file.open(filename);
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curMat = 0;
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if (!file.is_open())
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throw std::runtime_error("OBJ : could not open object file");
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while (getline(file, line))
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{
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try{
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if(line[0] == '#' || line.empty())
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continue;
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std::stringstream lineStream(line);
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identifier = "";
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lineStream >> identifier;
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if(identifier == "v")
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vertices.push_back(getVertex(lineStream));
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else if (identifier == "f")
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_scene->addObject(getFace(lineStream, vertices, curMat));
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else if (identifier == "mtllib")
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parseMtl(lineStream, matNames);
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else if (identifier == "usemtl")
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{
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lineStream >> identifier;
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if(matNames.find(identifier) == matNames.end())
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throw std::runtime_error("OBJ: invalid material name");
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curMat = matNames[identifier];
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}
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}catch (std::exception &e)
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{
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std::cerr << line << std::endl;
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throw;
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}
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}
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}
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bool SceneParser::parseLine(const std::string &line)
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{
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if (line.empty() || line[0] == '#')
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return (true);
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std::stringstream ss(line);
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std::string identifier;
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ss >> identifier;
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try
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{
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auto it = object_parsers.find(identifier);
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if (it != object_parsers.end())
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{
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Object *obj = it->second(ss);
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(void) _scene->getMaterial(obj->getMaterialIndex()); //verify material
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if (obj->getType() == Object::Type::PORTAL)
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_scene->addObject(static_cast<Portal *>(obj)->createSupportQuad());
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_scene->addObject(obj);
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}
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if (identifier == "MAT")
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this->parseMaterial(ss);
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else if (identifier == "CAM")
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this->parseCamera(ss);
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else if (identifier == "OBJ")
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parseObj(ss);
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}
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catch (const std::exception& e)
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{
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std::cerr << e.what() << std::endl;
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return (false);
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}
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return (true);
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}
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