# Appendix B¶

In this appendix we present alphabetical list of CellG attributes:

**clusterId** - cluster id

**clusterSurface** - total surface of a cluster that a given cell belongs
to. Needs ClusterSurface Plugin

**ecc** - eccentricity of cell . Needs MomentOfInertia plugin

**extraAttribPtr** - a C++ pointer to Python dictionary attached to each
cell

**flag** - integer **variable** - unused. Can be used from Python

**fluctAmpl** - fluctuation amplitude. Default value **is** -1

**iXX** - xx component of inertia tensor. Needs MomentOfInertia Plugin

iXY- xy component of inertia tensor. Needs MomentOfInertia Plugin

iXZ- xz component of inertia tensor. Needs MomentOfInertia Plugin

iYY- yy component of inertia tensor. Needs MomentOfInertia Plugin

iYZ- yz component of inertia tensor. Needs MomentOfInertia Plugin

iZZ- zz component of inertia tensor. Needs MomentOfInertia Plugin

**id** - cell id

lX- x component of orientation vector. Set by MomentOfInertia

lY- y component of orientation vector. Set by MomentOfInertia

lZ- z component of orientation vector. Set by MomentOfInertia

**lambdaClusterSurface** - lambda (constraint strength) of cluster surface
constraint.Needs ClusterSurface Plugin

**lambdaSurface** - lambda (constraint strength) of surface constraint.
Needs Surface Plugin

**lambdaVecX** - x component of force applied to cell. Needs
ExternalPotential Plugin

**lambdaVecY** - y component of force applied to cell. Needs
ExternalPotential Plugin

**lambdaVecZ** - z component of force applied to cell. Needs
ExternalPotential Plugin

**lambdaVolume** - lambda (constraint strength) of volume constraint. Needs
Volume Plugin

**subtype** - currently unused

**surface** - instantaneous cell surface. Needs Surface or SurfaceTracker
plugin

**targetClusterSurface** - target value of cluster surface constraint.Needs
ClusterSurface Plugin

**targetSurface** - target value of surface constraint. Needs Surface Plugin

**targetVolume** - target value of volume constraint. Needs Volume Plugin

**type** - cell type

**volume** - instantaneous cell volume. Needs VolumeTracker plugin which is
loaded by default by every CC3D simulation.

**xCM** - numerator of x-component expression for cell centroid

**xCOM** - x component of cell centroid

**xCOMPrev** - x component of cell centroid from previous MCS

**yCM** - numerator of y-component expression for cell centroid

**yCOM** - y component of cell centroid

**yCOMPrev** - y component of cell centroid from previous MCS

**zCM** - numerator of z-component expression for cell centroid

**zCOM** - z component of cell centroid

**zCOMPrev** - z component of cell centroid from previous MCS