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228 lines
11 KiB
C++
228 lines
11 KiB
C++
//
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// Created by orange on 07.03.2026.
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//
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#ifdef OMATH_ENABLE_LUA
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#include "omath/lua/lua.hpp"
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#include <omath/engines/cry_engine/camera.hpp>
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#include <omath/engines/frostbite_engine/camera.hpp>
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#include <omath/engines/iw_engine/camera.hpp>
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#include <omath/engines/opengl_engine/camera.hpp>
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#include <omath/engines/source_engine/camera.hpp>
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#include <omath/engines/unity_engine/camera.hpp>
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#include <omath/engines/unreal_engine/camera.hpp>
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#include <sol/sol.hpp>
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#include <string_view>
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namespace
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{
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// ---- Canonical shared C++ type aliases ----------------------------------
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// Each unique template instantiation must be registered exactly once.
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using PitchAngle90 = omath::Angle<float, -90.f, 90.f, omath::AngleFlags::Clamped>;
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using PitchAngle89 = omath::Angle<float, -89.f, 89.f, omath::AngleFlags::Clamped>;
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using SharedYawRoll = omath::Angle<float, -180.f, 180.f, omath::AngleFlags::Normalized>;
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using SharedFoV = omath::Angle<float, 0.f, 180.f, omath::AngleFlags::Clamped>;
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using ViewAngles90 = omath::ViewAngles<PitchAngle90, SharedYawRoll, SharedYawRoll>;
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using ViewAngles89 = omath::ViewAngles<PitchAngle89, SharedYawRoll, SharedYawRoll>;
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std::string projection_error_to_string(omath::projection::Error e)
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{
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switch (e)
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{
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case omath::projection::Error::WORLD_POSITION_IS_OUT_OF_SCREEN_BOUNDS:
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return "world position is out of screen bounds";
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case omath::projection::Error::INV_VIEW_PROJ_MAT_DET_EQ_ZERO:
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return "inverse view-projection matrix determinant is zero";
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}
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return "unknown error";
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}
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template<class AngleType>
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void register_angle(sol::table& table, const char* name)
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{
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table.new_usertype<AngleType>(
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name, sol::no_constructor, "from_degrees", &AngleType::from_degrees, "from_radians",
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&AngleType::from_radians, "as_degrees", &AngleType::as_degrees, "as_radians", &AngleType::as_radians,
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"sin", &AngleType::sin, "cos", &AngleType::cos, "tan", &AngleType::tan, "cot", &AngleType::cot,
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sol::meta_function::addition, [](const AngleType& a, const AngleType& b)
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{ return AngleType::from_degrees(a.as_degrees() + b.as_degrees()); }, sol::meta_function::subtraction,
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[](const AngleType& a, const AngleType& b)
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{ return AngleType::from_degrees(a.as_degrees() - b.as_degrees()); }, sol::meta_function::unary_minus,
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[](const AngleType& a) { return AngleType::from_degrees(-a.as_degrees()); },
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sol::meta_function::equal_to, [](const AngleType& a, const AngleType& b) { return a == b; },
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sol::meta_function::to_string, [](const AngleType& a) { return std::format("{}deg", a.as_degrees()); });
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}
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// Set aliases in an engine subtable pointing to the already-registered shared types
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template<class PitchAngleType, class ViewAnglesType>
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void set_engine_aliases(sol::table& engine_table, sol::table& types)
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{
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if constexpr (std::is_same_v<PitchAngleType, PitchAngle90>)
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engine_table["PitchAngle"] = types["PitchAngle90"];
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else
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engine_table["PitchAngle"] = types["PitchAngle89"];
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engine_table["YawAngle"] = types["YawRoll"];
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engine_table["RollAngle"] = types["YawRoll"];
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engine_table["FieldOfView"] = types["FieldOfView"];
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engine_table["ViewPort"] = types["ViewPort"];
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if constexpr (std::is_same_v<ViewAnglesType, ViewAngles90>)
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engine_table["ViewAngles"] = types["ViewAngles90"];
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else
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engine_table["ViewAngles"] = types["ViewAngles89"];
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}
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// Register an engine: alias shared types, register unique Camera
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template<class EngineTraits>
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void register_engine(sol::table& omath_table, const char* subtable_name)
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{
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using PitchAngle = typename EngineTraits::PitchAngle;
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using ViewAngles = typename EngineTraits::ViewAngles;
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using Camera = typename EngineTraits::Camera;
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auto engine_table = omath_table[subtable_name].get_or_create<sol::table>();
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auto types = omath_table["_types"].get<sol::table>();
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set_engine_aliases<PitchAngle, ViewAngles>(engine_table, types);
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engine_table.new_usertype<Camera>(
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"Camera",
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sol::constructors<Camera(const omath::Vector3<float>&, const ViewAngles&,
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const omath::projection::ViewPort&, const omath::projection::FieldOfView&,
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float, float)>(),
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"look_at", &Camera::look_at, "get_forward", &Camera::get_forward, "get_right", &Camera::get_right,
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"get_up", &Camera::get_up, "get_origin", &Camera::get_origin, "get_view_angles",
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&Camera::get_view_angles, "get_near_plane", &Camera::get_near_plane, "get_far_plane",
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&Camera::get_far_plane, "get_field_of_view", &Camera::get_field_of_view, "set_origin",
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&Camera::set_origin, "set_view_angles", &Camera::set_view_angles, "set_view_port",
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&Camera::set_view_port, "set_field_of_view", &Camera::set_field_of_view, "set_near_plane",
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&Camera::set_near_plane, "set_far_plane", &Camera::set_far_plane,
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"world_to_screen",
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[](const Camera& cam, const omath::Vector3<float>& pos)
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-> std::tuple<sol::optional<omath::Vector3<float>>, sol::optional<std::string>>
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{
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auto result = cam.world_to_screen(pos);
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if (result)
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return {*result, sol::nullopt};
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return {sol::nullopt, projection_error_to_string(result.error())};
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},
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"screen_to_world",
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[](const Camera& cam, const omath::Vector3<float>& pos)
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-> std::tuple<sol::optional<omath::Vector3<float>>, sol::optional<std::string>>
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{
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auto result = cam.screen_to_world(pos);
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if (result)
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return {*result, sol::nullopt};
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return {sol::nullopt, projection_error_to_string(result.error())};
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});
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}
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// ---- Engine trait structs -----------------------------------------------
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struct OpenGLEngineTraits
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{
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using PitchAngle = omath::opengl_engine::PitchAngle;
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using ViewAngles = omath::opengl_engine::ViewAngles;
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using Camera = omath::opengl_engine::Camera;
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};
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struct FrostbiteEngineTraits
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{
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using PitchAngle = omath::frostbite_engine::PitchAngle;
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using ViewAngles = omath::frostbite_engine::ViewAngles;
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using Camera = omath::frostbite_engine::Camera;
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};
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struct IWEngineTraits
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{
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using PitchAngle = omath::iw_engine::PitchAngle;
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using ViewAngles = omath::iw_engine::ViewAngles;
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using Camera = omath::iw_engine::Camera;
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};
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struct SourceEngineTraits
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{
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using PitchAngle = omath::source_engine::PitchAngle;
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using ViewAngles = omath::source_engine::ViewAngles;
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using Camera = omath::source_engine::Camera;
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};
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struct UnityEngineTraits
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{
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using PitchAngle = omath::unity_engine::PitchAngle;
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using ViewAngles = omath::unity_engine::ViewAngles;
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using Camera = omath::unity_engine::Camera;
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};
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struct UnrealEngineTraits
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{
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using PitchAngle = omath::unreal_engine::PitchAngle;
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using ViewAngles = omath::unreal_engine::ViewAngles;
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using Camera = omath::unreal_engine::Camera;
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};
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struct CryEngineTraits
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{
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using PitchAngle = omath::cry_engine::PitchAngle;
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using ViewAngles = omath::cry_engine::ViewAngles;
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using Camera = omath::cry_engine::Camera;
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};
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} // namespace
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namespace omath::lua
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{
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void LuaInterpreter::register_shared_types(sol::table& omath_table)
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{
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auto t = omath_table["_types"].get_or_create<sol::table>();
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register_angle<PitchAngle90>(t, "PitchAngle90");
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register_angle<PitchAngle89>(t, "PitchAngle89");
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register_angle<SharedYawRoll>(t, "YawRoll");
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register_angle<SharedFoV>(t, "FieldOfView");
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t.new_usertype<omath::projection::ViewPort>(
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"ViewPort", sol::factories([](float w, float h) { return omath::projection::ViewPort{w, h}; }), "width",
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sol::property([](const omath::projection::ViewPort& vp) { return vp.m_width; },
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[](omath::projection::ViewPort& vp, float val) { vp.m_width = val; }),
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"height",
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sol::property([](const omath::projection::ViewPort& vp) { return vp.m_height; },
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[](omath::projection::ViewPort& vp, float val) { vp.m_height = val; }),
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"aspect_ratio", &omath::projection::ViewPort::aspect_ratio);
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t.new_usertype<ViewAngles90>(
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"ViewAngles90",
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sol::factories([](PitchAngle90 p, SharedYawRoll y, SharedYawRoll r) { return ViewAngles90{p, y, r}; }),
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"pitch",
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sol::property([](const ViewAngles90& va) { return va.pitch; },
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[](ViewAngles90& va, const PitchAngle90& val) { va.pitch = val; }),
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"yaw",
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sol::property([](const ViewAngles90& va) { return va.yaw; },
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[](ViewAngles90& va, const SharedYawRoll& val) { va.yaw = val; }),
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"roll",
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sol::property([](const ViewAngles90& va) { return va.roll; },
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[](ViewAngles90& va, const SharedYawRoll& val) { va.roll = val; }));
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t.new_usertype<ViewAngles89>(
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"ViewAngles89",
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sol::factories([](PitchAngle89 p, SharedYawRoll y, SharedYawRoll r) { return ViewAngles89{p, y, r}; }),
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"pitch",
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sol::property([](const ViewAngles89& va) { return va.pitch; },
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[](ViewAngles89& va, const PitchAngle89& val) { va.pitch = val; }),
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"yaw",
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sol::property([](const ViewAngles89& va) { return va.yaw; },
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[](ViewAngles89& va, const SharedYawRoll& val) { va.yaw = val; }),
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"roll",
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sol::property([](const ViewAngles89& va) { return va.roll; },
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[](ViewAngles89& va, const SharedYawRoll& val) { va.roll = val; }));
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}
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void LuaInterpreter::register_engines(sol::table& omath_table)
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{
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register_engine<OpenGLEngineTraits>(omath_table, "opengl");
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register_engine<FrostbiteEngineTraits>(omath_table, "frostbite");
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register_engine<IWEngineTraits>(omath_table, "iw");
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register_engine<SourceEngineTraits>(omath_table, "source");
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register_engine<UnityEngineTraits>(omath_table, "unity");
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register_engine<UnrealEngineTraits>(omath_table, "unreal");
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register_engine<CryEngineTraits>(omath_table, "cry");
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}
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} // namespace omath::lua::detail
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#endif
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