src.backend.wad.physics
クラス 
AttackDefinition
DamageDefinition
FxpxChunk
FXpxEntry
MnpxChunk
MNpxEntry
PhysicsData
PhysicsFile
PhysicsFilter
PhysicsWriter
PrpxChunk
PRpxEntry
PxpxChunk
PXpxEntry
ShellCasing
TriggerDefinition
WppxChunk
WPpxEntry