light/modules/ecs/private/serializer.cpp
light7734 cd886aa8c9
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refactor: flatten directory structure
2025-07-20 04:46:15 +03:30

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C++

#include <asset_manager/asset_manager.hpp>
#include <camera/component.hpp>
#include <ecs/components.hpp>
#include <ecs/serializer.hpp>
#include <math/vec3.hpp>
#include <math/vec4.hpp>
#include <yaml-cpp/yaml.h>
namespace YAML {
template<>
struct convert<lt::math::vec3>
{
static auto encode(const lt::math::vec3 &rhs) -> Node
{
auto node = Node {};
node.push_back(rhs.x);
node.push_back(rhs.y);
node.push_back(rhs.z);
return node;
}
static auto decode(const Node &node, lt::math::vec3 &rhs) -> bool
{
if (!node.IsSequence() || node.size() != 3)
{
return false;
}
rhs.x = node[0].as<float>();
rhs.y = node[1].as<float>();
rhs.z = node[2].as<float>();
return true;
}
};
template<>
struct convert<lt::math::vec4>
{
static auto encode(const lt::math::vec4 &rhs) -> Node
{
auto node = Node {};
node.push_back(rhs.x);
node.push_back(rhs.y);
node.push_back(rhs.z);
node.push_back(rhs.w);
return node;
}
static auto decode(const Node &node, lt::math::vec4 &rhs) -> bool
{
if (!node.IsSequence() || node.size() != 4)
{
return false;
}
rhs.x = node[0].as<float>();
rhs.y = node[1].as<float>();
rhs.z = node[2].as<float>();
rhs.w = node[3].as<float>();
return true;
}
};
} // namespace YAML
namespace lt {
auto operator<<(YAML::Emitter &out, const math::vec3 &v) -> YAML::Emitter &
{
out << YAML::Flow;
out << YAML::BeginSeq << v.x << v.y << v.z << YAML::EndSeq;
return out;
}
auto operator<<(YAML::Emitter &out, const math::vec4 &v) -> YAML::Emitter &
{
out << YAML::Flow;
out << YAML::BeginSeq << v.x << v.y << v.z << v.w << YAML::EndSeq;
return out;
}
SceneSerializer::SceneSerializer(const Ref<Scene> &scene): m_scene(scene)
{
}
void SceneSerializer::serialize(const std::string &filePath)
{
auto out = YAML::Emitter {};
out << YAML::BeginMap; // Scene
out << YAML::Key << "Scene" << YAML::Value << "Untitled";
out << YAML::Key << "Entities" << YAML::Value << YAML::BeginSeq;
for (auto [entityID, storage] : m_scene->m_registry.storage())
{
auto entity = Entity { static_cast<entt::entity>(entityID), m_scene.get() };
if (!entity.is_valid())
{
return;
}
serialize_entity(out, entity);
};
out << YAML::EndSeq;
out << YAML::EndMap;
std::filesystem::create_directories(filePath.substr(0ull, filePath.find_last_of('\\')));
auto fout = std::ofstream { filePath };
if (!fout.is_open())
{
log_trc("Failed to create fout at: {}", filePath);
}
fout << out.c_str();
}
auto SceneSerializer::deserialize(const std::string &file_path) -> bool
{
auto stream = std::ifstream { file_path };
auto ss = std::stringstream {};
ss << stream.rdbuf();
auto data = YAML::Load(ss.str());
if (!data["Scene"])
{
return false;
}
auto sceneName = data["Scene"].as<std::string>();
log_trc("Deserializing scene: '{}'", sceneName);
auto entities = data["Entities"];
if (entities)
{
auto texturePaths = std::unordered_set<std::string> {};
for (auto entity : entities)
{
auto uuid = entity["entity"].as<uint64_t>(); // #todo
auto name = std::string {};
auto tagComponent = entity["TagComponent"];
if (tagComponent)
{
name = tagComponent["Tag"].as<std::string>();
}
log_trc("Deserialized entity '{}' : '{}'", uuid, name);
auto deserializedEntity = m_scene->create_entity_with_uuid(name, uuid);
auto gg = deserializedEntity.get_component<TagComponent>();
log_trc("tag: {}", gg.tag);
auto transformComponent = entity["TransformComponent"];
if (transformComponent)
{
auto &entityTransforomComponent = deserializedEntity
.get_component<TransformComponent>();
entityTransforomComponent.translation = transformComponent["Translation"]
.as<math::vec3>();
entityTransforomComponent.rotation = transformComponent["Rotation"]
.as<math::vec3>();
entityTransforomComponent.scale = transformComponent["Scale"].as<math::vec3>();
}
/* #TEMPORARY SOLUTION# */
auto spriteRendererComponent = entity["SpriteRendererComponent"];
if (spriteRendererComponent)
{
auto &entitySpriteRendererComponent = deserializedEntity
.add_component<SpriteRendererComponent>();
entitySpriteRendererComponent.tint = spriteRendererComponent["Tint"]
.as<math::vec4>();
auto texturePath = spriteRendererComponent["Texture"].as<std::string>();
if (!texturePaths.contains(texturePath))
{
AssetManager::load_texture(texturePath, texturePath);
texturePaths.insert(texturePath);
}
entitySpriteRendererComponent.texture = AssetManager::get_texture(texturePath);
}
/* #TEMPORARY SOLUTION# */
auto cameraComponent = entity["CameraComponent"];
if (cameraComponent)
{
auto &entityCameraComponent = deserializedEntity.add_component<CameraComponent>();
const auto &cameraSpecifications = cameraComponent["Camera"];
entityCameraComponent.camera.set_projection_type(
(SceneCamera::ProjectionType)cameraSpecifications["ProjectionType"].as<int>()
);
entityCameraComponent.camera.set_orthographic_size(
cameraSpecifications["OrthographicSize"].as<float>()
);
entityCameraComponent.camera.set_orthographic_near_plane(
cameraSpecifications["OrthographicNearPlane"].as<float>()
);
entityCameraComponent.camera.set_orthographic_far_plane(
cameraSpecifications["OrthographicFarPlane"].as<float>()
);
entityCameraComponent.camera.set_perspective_vertical_fov(
cameraSpecifications["PerspectiveVerticalFOV"].as<float>()
);
entityCameraComponent.camera.set_perspective_near_plane(
cameraSpecifications["PerspectiveNearPlane"].as<float>()
);
entityCameraComponent.camera.set_perspective_far_plane(
cameraSpecifications["PerspectiveFarPlane"].as<float>()
);
entityCameraComponent.camera.set_background_color(
cameraSpecifications["BackgroundColor"].as<math::vec4>()
);
entityCameraComponent.isPrimary = cameraComponent["IsPrimary"].as<bool>();
}
}
return true;
}
return false;
}
void SceneSerializer::serialize_binary(const std::string & /*filePath*/)
{
log_err("NO_IMPLEMENT");
}
auto SceneSerializer::deserialize_binary(const std::string & /*filePath*/) -> bool
{
log_err("NO_IMPLEMENT");
return false;
}
void SceneSerializer::serialize_entity(YAML::Emitter &out, Entity entity)
{
out << YAML::BeginMap; // entity
out << YAML::Key << "entity" << YAML::Value << entity.get_uuid(); // dummy uuid
if (entity.has_component<TagComponent>())
{
out << YAML::Key << "TagComponent";
out << YAML::BeginMap; // tag component
auto &tagComponent = entity.get_component<TagComponent>().tag;
out << YAML::Key << "Tag" << YAML::Value << tagComponent;
out << YAML::EndMap; // tag component
}
if (entity.has_component<TransformComponent>())
{
out << YAML::Key << "TransformComponent";
out << YAML::BeginMap; // transform component
auto &transformComponent = entity.get_component<TransformComponent>();
out << YAML::Key << "Translation" << YAML::Value << transformComponent.translation;
out << YAML::Key << "Rotation" << YAML::Value << transformComponent.rotation;
out << YAML::Key << "Scale" << YAML::Value << transformComponent.scale;
out << YAML::EndMap; // transform component;
}
if (entity.has_component<SpriteRendererComponent>())
{
// TODO(Light): get scene serialization/de-serialization working.
// out << YAML::Key << "SpriteRendererComponent";
// out << YAML::BeginMap; // sprite renderer component;
// auto &spriteRendererComponent = entity.get_component<SpriteRendererComponent>();
// out << YAML::Key << "Texture" << YAML::Value
// << spriteRendererComponent.texture->GetFilePath();
// out << YAML::Key << "Tint" << YAML::Value << spriteRendererComponent.tint;
// out << YAML::EndMap; // sprite renderer component
}
// #todo:
// if(entity.has_component<NativeScriptComponent>())
if (entity.has_component<CameraComponent>())
{
out << YAML::Key << "CameraComponent";
out << YAML::BeginMap; // camera component
auto &cameraComponent = entity.get_component<CameraComponent>();
out << YAML::Key << "Camera" << YAML::Value;
out << YAML::BeginMap; // camera
out << YAML::Key << "OrthographicSize" << YAML::Value
<< cameraComponent.camera.get_orthographic_size();
out << YAML::Key << "OrthographicFarPlane" << YAML::Value
<< cameraComponent.camera.get_orthographic_far_plane();
out << YAML::Key << "OrthographicNearPlane" << YAML::Value
<< cameraComponent.camera.get_orthographic_near_plane();
out << YAML::Key << "PerspectiveVerticalFOV" << YAML::Value
<< cameraComponent.camera.get_perspective_vertical_fov();
out << YAML::Key << "PerspectiveFarPlane" << YAML::Value
<< cameraComponent.camera.get_perspective_far_plane();
out << YAML::Key << "PerspectiveNearPlane" << YAML::Value
<< cameraComponent.camera.get_perspective_near_plane();
out << YAML::Key << "ProjectionType" << YAML::Value
<< (int)cameraComponent.camera.get_projection_type();
out << YAML::Key << "BackgroundColor" << YAML::Value
<< cameraComponent.camera.get_background_color();
out << YAML::EndMap; // camera
out << YAML::Key << "IsPrimary" << YAML::Value << cameraComponent.isPrimary;
out << YAML::EndMap; // camera component
}
out << YAML::EndMap; // entity
}
} // namespace lt