diff options
Diffstat (limited to 'src/openvic-simulation/dataloader/NodeTools.hpp')
| -rw-r--r-- | src/openvic-simulation/dataloader/NodeTools.hpp | 31 |
1 files changed, 29 insertions, 2 deletions
diff --git a/src/openvic-simulation/dataloader/NodeTools.hpp b/src/openvic-simulation/dataloader/NodeTools.hpp index c41c09e..0bb4d5b 100644 --- a/src/openvic-simulation/dataloader/NodeTools.hpp +++ b/src/openvic-simulation/dataloader/NodeTools.hpp @@ -443,9 +443,17 @@ namespace OpenVic { }; } + /* By default this will only allow an optional to be set once. Set allow_overwrite + * to true to allow multiple assignments, with the last taking precedence. */ template<typename T> - Callback<T const&> auto assign_variable_callback_pointer(std::optional<T const*>& var) { - return [&var](T const& val) -> bool { + Callback<T const&> auto assign_variable_callback_pointer_opt( + std::optional<T const*>& var, bool allow_overwrite = false + ) { + return [&var, allow_overwrite](T const& val) -> bool { + if (!allow_overwrite && var.has_value()) { + Logger::error("Canoot assign pointer value to already-initialised optional!"); + return false; + } var = &val; return true; }; @@ -506,5 +514,24 @@ namespace OpenVic { return warn; }; } + + /* Often used for rotations which must be negated due to OpenVic's coordinate system being orientated + * oppositely to Vic2's. */ + template<typename T = fixed_point_t> + constexpr Callback<T> auto negate_callback(Callback<T> auto callback) { + return [callback](T val) -> bool { + return callback(-val); + }; + } + + /* Often used for map-space coordinates which must have their y-coordinate flipped due to OpenVic using the + * top-left of the map as the origin as opposed Vic2 using the bottom-left. */ + template<typename T> + constexpr Callback<vec2_t<T>> auto flip_y_callback(Callback<vec2_t<T>> auto callback, T height) { + return [callback, height](vec2_t<T> val) -> bool { + val.y = height - val.y; + return callback(val); + }; + } } } |