Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Simulation
RIGIDBODY_PBD_SIMULATION_PRIORITY
Parameter: Enable
RIGIDBODY_USE
Parameter: Mass
RIGIDBODY_PBD_MASS
Parameter: Rotational Mass
RIGIDBODY_PBD_ROTATIONAL_MASS
Parameter: Friction
RIGIDBODY_PBD_FRICTION
Parameter: Bounciness
RIGIDBODY_PBD_BOUNCINESS
Parameter: Stickiness
RIGIDBODY_PBD_STICKINESS
Parameter: Thickness
RIGIDBODY_PBD_THICKNESS
Parameter: Is Hollow
RIGIDBODY_PBD_ISHOLLOW
Parameter: Collision Side
RIGIDBODY_PBD_COLLISION_SIDE
Parameter: Custom Center
RIGIDBODY_PBD_CUSTOM_CENTER_OF_MASS
Parameter: Center
RIGIDBODY_PBD_CENTER_OF_MASS
Parameter: Custom Initial Velocity
RIGIDBODY_PBD_CUSTOM_INITIAL_VELOCITY
Parameter: Object Coordinates
RIGIDBODY_PBD_INITIAL_VELOCITY_IN_LOCALSPACE
Parameter: Direction
RIGIDBODY_PBD_INITIAL_LINEAR_VELOCITY
Parameter: Speed
RIGIDBODY_PBD_INITIAL_LINEAR_VELOCITY_STRENGTH
Parameter: Shoot At
RIGIDBODY_PBD_INITIAL_VELOCITY_TARGET
Parameter: Custom Initial Angular Velocity
RIGIDBODY_PBD_CUSTOM_INITIAL_ANGULAR_VELOCITY
Parameter: Object Coordinates
RIGIDBODY_PBD_INITIAL_ANGULAR_VELOCITY_IN_LOCALSPACE
Parameter: Axis
RIGIDBODY_PBD_INITIAL_ANGULAR_VELOCITY
Parameter: Speed
RIGIDBODY_PBD_INITIAL_ANGULAR_VELOCITY_STRENGTH
Parameter: Draw
RIGIDBODY_PBD_DRAW_INITIAL_VELOCITY
Parameter: Mode
RIGIDBODY_PBD_FORCES_INEXMODE
Parameter: Objects
RIGIDBODY_PBD_FORCES_INEXCLUDE
Parameter: Pyro
RIGIDBODY_PBD_FORCES_INEX_PYRO
Parameter: Cache Mode
RIGIDBODY_PBD_CACHE_ENABLE
Parameter: Start
RIGIDBODY_PBD_CACHE_START
Parameter: Calculate Cache
RIGIDBODY_PBD_DO_CALCULATE
Parameter: Cache Scene
RIGIDBODY_PBD_DO_CALCULATE_ALL
Parameter: Clear Cache
RIGIDBODY_PBD_DELCACHE
Parameter: Clear Cache Scene
RIGIDBODY_PBD_DELCACHE_ALL
Parameter: Update Frame
RIGIDBODY_PBD_CACHE_FRAME