moving_wall_semantics.h

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#ifndef YAZE_ZELDA3_DUNGEON_MOVING_WALL_SEMANTICS_H_
#define YAZE_ZELDA3_DUNGEON_MOVING_WALL_SEMANTICS_H_
 
#include <array>
 
namespace yaze {
namespace zelda3 {
namespace moving_wall {
 
// USDASM uses the high two size bits for the vertical platform repetition and
// the low two bits for the horizontal fill-column count.
inline constexpr std::array<int, 4> kDirections = {5, 7, 11, 15};
inline constexpr std::array<int, 4> kObjectCounts = {8, 16, 24, 32};
 
constexpr int DirectionForSize(int size) {
  return kDirections[(size >> 2) & 0x03];
}
 
constexpr int ObjectCountForSize(int size) {
  return kObjectCounts[size & 0x03];
}
 
}  // namespace moving_wall
}  // namespace zelda3
}  // namespace yaze
 
#endif  // YAZE_ZELDA3_DUNGEON_MOVING_WALL_SEMANTICS_H_