The script below is an example of a Meta-Command. The script below would be saved as a v3m file and placed in the Meta-Command folder.

This Meta-Command creates kinematic gait events using the method described here.

This Meta-Command can be downloaded here.

Once the Meta-Command (v3m file) has been placed in the Meta-Command folder, it can be called from any other pipeline file:

Kinematic_Events_Foot_Position
! /HEELSTRIKE_LABEL=HS
! /TOEOFF_LABEL=TO
;

! BEGIN_META
! META_CMD_NAME=Kinematic_Gait_Events
! META_PARAM= HEELSTRIKE_LABEL  : string :HS:yes
! META_PARAM= TOEOFF_LABEL  : string :TO:yes
! END_META

! ============================================================================
! Kinematic Gait Events
! ============================================================================
 
! This step is not necessary, but important to make sure that 
!   any events that were previously created are deleted

Event_Delete
/EVENT_NAME=R&::HEELSTRIKE_LABEL&+R&::TOEOFF_LABEL&+L&::HEELSTRIKE_LABEL&+L&::TOEOFF_LABEL&
! /EVENT_SEQUENCE=
! /EXCLUDE_EVENTS=
! /EVENT_INSTANCE=
! /TIME=
;
 
! ----------------------------------------------------------------------------
!  Transform the position of the foot into the Pelvis Coordinate System
! ----------------------------------------------------------------------------

! Right Foot

Compute_Model_Based_Data
/RESULT_NAME=RToe_Wrt_Pelvis
/FUNCTION=SEG_DISTAL_JOINT
/SEGMENT=RFT
/REFERENCE_SEGMENT=RPV
/RESOLUTION_COORDINATE_SYSTEM=RPV
! /USE_CARDAN_SEQUENCE=FALSE
! /NORMALIZATION=FALSE
! /NORMALIZATION_METHOD=
! /NORMALIZATION_METRIC=
! /NEGATEX=FALSE
! /NEGATEY=FALSE
! /NEGATEZ=FALSE
! /AXIS1=X
! /AXIS2=Y
! /AXIS3=Z
! /TREADMILL_DATA=FALSE
! /TREADMILL_DIRECTION=UNIT_VECTOR(0,1,0)
! /TREADMILL_SPEED=0.0
;

Compute_Model_Based_Data
/RESULT_NAME=RHeel_Wrt_Pelvis
/FUNCTION=SEG_PROXIMAL_JOINT
/SEGMENT=RFT
/REFERENCE_SEGMENT=RPV
/RESOLUTION_COORDINATE_SYSTEM=RPV
! /USE_CARDAN_SEQUENCE=FALSE
! /NORMALIZATION=FALSE
! /NORMALIZATION_METHOD=
! /NORMALIZATION_METRIC=
! /NEGATEX=FALSE
! /NEGATEY=FALSE
! /NEGATEZ=FALSE
! /AXIS1=X
! /AXIS2=Y
! /AXIS3=Z
! /TREADMILL_DATA=FALSE
! /TREADMILL_DIRECTION=UNIT_VECTOR(0,1,0)
! /TREADMILL_SPEED=0.0
;

! Left Foot

Compute_Model_Based_Data
/RESULT_NAME=LToe_Wrt_Pelvis
/FUNCTION=SEG_DISTAL_JOINT
/SEGMENT=LFT
/REFERENCE_SEGMENT=RPV
/RESOLUTION_COORDINATE_SYSTEM=RPV
! /USE_CARDAN_SEQUENCE=FALSE
! /NORMALIZATION=FALSE
! /NORMALIZATION_METHOD=
! /NORMALIZATION_METRIC=
! /NEGATEX=FALSE
! /NEGATEY=FALSE
! /NEGATEZ=FALSE
! /AXIS1=X
! /AXIS2=Y
! /AXIS3=Z
! /TREADMILL_DATA=FALSE
! /TREADMILL_DIRECTION=UNIT_VECTOR(0,1,0)
! /TREADMILL_SPEED=0.0
;

Compute_Model_Based_Data
/RESULT_NAME=LHeel_Wrt_Pelvis
/FUNCTION=SEG_PROXIMAL_JOINT
/SEGMENT=LFT
/REFERENCE_SEGMENT=RPV
/RESOLUTION_COORDINATE_SYSTEM=RPV
! /USE_CARDAN_SEQUENCE=FALSE
! /NORMALIZATION=FALSE
! /NORMALIZATION_METHOD=
! /NORMALIZATION_METRIC=
! /NEGATEX=FALSE
! /NEGATEY=FALSE
! /NEGATEZ=FALSE
! /AXIS1=X
! /AXIS2=Y
! /AXIS3=Z
! /TREADMILL_DATA=FALSE
! /TREADMILL_DIRECTION=UNIT_VECTOR(0,1,0)
! /TREADMILL_SPEED=0.0
;

! ----------------------------------------------------------------------------
!  Create Events
!  - Heel Strike: When the foot is furthest in front of the pelvis
!  - Toe Off: When the foot is furthest behind the pelvis
! ----------------------------------------------------------------------------
 
Event_Maximum
/SIGNAL_TYPES=LINK_MODEL_BASED
/SIGNAL_NAMES=RHEEL_WRT_PELVIS
! /SIGNAL_FOLDER=ORIGINAL
/EVENT_NAME=R&::HEELSTRIKE_LABEL&
! /SELECT_X=FALSE
/SELECT_Y=TRUE
! /SELECT_Z=FALSE
! /FRAME_WINDOW=8
! /START_AT_EVENT=
! /END_AT_EVENT=
! /EVENT_INSTANCE=
;

Event_Minimum
/SIGNAL_TYPES=LINK_MODEL_BASED
/SIGNAL_NAMES=RTOE_WRT_PELVIS
! /SIGNAL_FOLDER=ORIGINAL
/EVENT_NAME=R&::TOEOFF_LABEL&
! /SELECT_X=FALSE
/SELECT_Y=TRUE
! /SELECT_Z=FALSE
! /FRAME_WINDOW=8
! /START_AT_EVENT=
! /END_AT_EVENT=
! /EVENT_INSTANCE=
; 

Event_Maximum
/SIGNAL_TYPES=LINK_MODEL_BASED
/SIGNAL_NAMES=LHEEL_WRT_PELVIS
! /SIGNAL_FOLDER=ORIGINAL
/EVENT_NAME=L&::HEELSTRIKE_LABEL&
! /SELECT_X=FALSE
/SELECT_Y=TRUE
! /SELECT_Z=FALSE
! /FRAME_WINDOW=8
! /START_AT_EVENT=
! /END_AT_EVENT=
! /EVENT_INSTANCE=
;

Event_Minimum
/SIGNAL_TYPES=LINK_MODEL_BASED
/SIGNAL_NAMES=LTOE_WRT_PELVIS
! /SIGNAL_FOLDER=ORIGINAL
/EVENT_NAME=L&::TOEOFF_LABEL&
! /SELECT_X=FALSE
/SELECT_Y=TRUE
! /SELECT_Z=FALSE
! /FRAME_WINDOW=8
! /START_AT_EVENT=
! /END_AT_EVENT=
! /EVENT_INSTANCE=
;