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