CenterOfMassPosition

The CenterOfMassPosition step calculates and records the center of mass position of the system or a specified group of particles over time.

Output format:

# step CenterOfMass_X CenterOffMass_Y CenterOffMass_Z
0 1.234 5.678 9.012
100 1.345 5.789 9.123
200 1.456 5.890 9.234

---

• type: GeometricalMeasure, CenterOfMassPosition

• parameters:

  • outputFilePath: string: Path to the output file

Example:

"comPosition":{
  "type":["GeometricalMeasure","CenterOfMassPosition"],
  "parameters":{
    "intervalStep": 10000,
    "group": "selected_group",
    "outputFilePath": "com_position.dat"
  }
}

Note

The output file will contain the step number and the x, y, z coordinates of the center of mass.

Tip

This measure is useful for tracking the overall motion of the system or specific groups of particles.