mirror of
https://github.com/libretro/devilutionX.git
synced 2026-11-08 08:09:09 -10:00
Gleb Mazovetskiy
0f77cc3797
This has little or no effect on the optimized build but significantly improves performance of the headless debug build `timedemo_test` on my machine goes from 3s to 2s.
47 lines
1.6 KiB
C++
47 lines
1.6 KiB
C++
#pragma once
|
|
|
|
#include <cstdint>
|
|
#include <string_view>
|
|
#include <type_traits>
|
|
|
|
#include "utils/attributes.h"
|
|
|
|
namespace devilution {
|
|
|
|
enum class Direction : std::uint8_t {
|
|
South,
|
|
SouthWest,
|
|
West,
|
|
NorthWest,
|
|
North,
|
|
NorthEast,
|
|
East,
|
|
SouthEast,
|
|
NoDirection
|
|
};
|
|
|
|
/** Maps from direction to a left turn from the direction. */
|
|
DVL_ALWAYS_INLINE constexpr Direction Left(Direction facing)
|
|
{
|
|
// Direction left[8] = { Direction::SouthEast, Direction::South, Direction::SouthWest, Direction::West, Direction::NorthWest, Direction::North, Direction::NorthEast, Direction::East };
|
|
return static_cast<Direction>((static_cast<std::underlying_type_t<Direction>>(facing) + 7) % 8);
|
|
}
|
|
|
|
/** Maps from direction to a right turn from the direction. */
|
|
DVL_ALWAYS_INLINE constexpr Direction Right(Direction facing)
|
|
{
|
|
// Direction right[8] = { Direction::SouthWest, Direction::West, Direction::NorthWest, Direction::North, Direction::NorthEast, Direction::East, Direction::SouthEast, Direction::South };
|
|
return static_cast<Direction>((static_cast<std::underlying_type_t<Direction>>(facing) + 1) % 8);
|
|
}
|
|
|
|
/** Maps from direction to the opposite direction. */
|
|
DVL_ALWAYS_INLINE constexpr Direction Opposite(Direction facing)
|
|
{
|
|
// Direction opposite[8] = { Direction::North, Direction::NorthEast, Direction::East, Direction::SouthEast, Direction::South, Direction::SouthWest, Direction::West, Direction::NorthWest };
|
|
return static_cast<Direction>((static_cast<std::underlying_type_t<Direction>>(facing) + 4) % 8);
|
|
}
|
|
|
|
std::string_view DirectionToString(Direction direction);
|
|
|
|
} // namespace devilution
|