#include "render-config.h" #include "picojson.h" #include <fstream> #include <istream> namespace example { bool LoadRenderConfig(example::RenderConfig* config, const char* filename) { std::ifstream is(filename); if (is.fail()) { std::cerr << "Cannot open " << filename << std::endl; return false; } std::istream_iterator<char> input(is); std::string err; picojson::value v; input = picojson::parse(v, input, std::istream_iterator<char>(), &err); if (!err.empty()) { std::cerr << err << std::endl; } if (!v.is<picojson::object>()) { std::cerr << "Not a JSON object" << std::endl; return false; } picojson::object o = v.get<picojson::object>(); if (o.find("obj_filename") != o.end()) { if (o["obj_filename"].is<std::string>()) { config->obj_filename = o["obj_filename"].get<std::string>(); } } if (o.find("gltf_filename") != o.end()) { if (o["gltf_filename"].is<std::string>()) { config->gltf_filename = o["gltf_filename"].get<std::string>(); } } if (o.find("eson_filename") != o.end()) { if (o["eson_filename"].is<std::string>()) { config->eson_filename = o["eson_filename"].get<std::string>(); } } config->scene_scale = 1.0f; if (o.find("scene_scale") != o.end()) { if (o["scene_scale"].is<double>()) { config->scene_scale = static_cast<float>(o["scene_scale"].get<double>()); } } config->eye[0] = 0.0f; config->eye[1] = 0.0f; config->eye[2] = 5.0f; if (o.find("eye") != o.end()) { if (o["eye"].is<picojson::array>()) { picojson::array arr = o["eye"].get<picojson::array>(); if (arr.size() == 3) { config->eye[0] = static_cast<float>(arr[0].get<double>()); config->eye[1] = static_cast<float>(arr[1].get<double>()); config->eye[2] = static_cast<float>(arr[2].get<double>()); } } } config->up[0] = 0.0f; config->up[1] = 1.0f; config->up[2] = 0.0f; if (o.find("up") != o.end()) { if (o["up"].is<picojson::array>()) { picojson::array arr = o["up"].get<picojson::array>(); if (arr.size() == 3) { config->up[0] = static_cast<float>(arr[0].get<double>()); config->up[1] = static_cast<float>(arr[1].get<double>()); config->up[2] = static_cast<float>(arr[2].get<double>()); } } } config->look_at[0] = 0.0f; config->look_at[1] = 0.0f; config->look_at[2] = 0.0f; if (o.find("look_at") != o.end()) { if (o["look_at"].is<picojson::array>()) { picojson::array arr = o["look_at"].get<picojson::array>(); if (arr.size() == 3) { config->look_at[0] = static_cast<float>(arr[0].get<double>()); config->look_at[1] = static_cast<float>(arr[1].get<double>()); config->look_at[2] = static_cast<float>(arr[2].get<double>()); } } } config->fov = 45.0f; if (o.find("fov") != o.end()) { if (o["fov"].is<double>()) { config->fov = static_cast<float>(o["fov"].get<double>()); } } config->width = 512; if (o.find("width") != o.end()) { if (o["width"].is<double>()) { config->width = static_cast<int>(o["width"].get<double>()); } } config->height = 512; if (o.find("height") != o.end()) { if (o["height"].is<double>()) { config->height = static_cast<int>(o["height"].get<double>()); } } return true; } } // namespace example