Parameters are accessed with C4DAtom::GetParameter()/ C4DAtom::SetParameter(). See Parameter IDs.
Parameter: Pull
ID_CA_MUSCLE_DEFORMER_PULL_STRENGTH
Parameter: Slide
ID_CA_MUSCLE_DEFORMER_SLIDE_STRENGTH
Parameter: Fat Offset
ID_CA_MUSCLE_DEFORMER_FAT_OFFSET
Parameter: Initialize
ID_CA_MUSCLE_DEFORMER_INIT
Parameter: Clear
ID_CA_MUSCLE_DEFORMER_FREE
Parameter: Distance
ID_CA_MUSCLE_DEFORMER_DISTANCE
Parameter: Pull Mode
ID_CA_MUSCLE_DEFORMER_PULL_MODE
Parameter: Pull Fall-Off
ID_CA_MUSCLE_DEFORMER_PULL_CURVE
Parameter: Stretch
ID_CA_MUSCLE_DEFORMER_STRETCH
Parameter: Strength
ID_CA_MUSCLE_DEFORMER_STRETCH_STRENGTH
Parameter: Iterations
ID_CA_MUSCLE_DEFORMER_STRETCH_ITERATIONS
Parameter: Stiffness
ID_CA_MUSCLE_DEFORMER_STRETCH_STIFFNESS
Parameter: Objects
ID_CA_MUSCLE_DEFORMER_OBJECT_LIST