GFtbox Growth factor naming conventions

Prefix

id_	identity factors (non-diffusible). Identity factors can be labelled as on the A or B side (ida_, idb_)
s_	signalling factors (diffuse not including polariser)
v_	visualising labels (e.g. theta, bend, kpar, other labels)
f_	finite element manipulation (e.g. seams, making holes)

_p	promotor: how much the expression of the factor is being promoted in the model
_l	level of morphogen, i.e. _p times _a. This gets updated at the end of the interaction function and might change according to growth or mutation, see *_a.
_i	index into the main data structure morphogen field, m.morphogen.
_a	activity: by default it is 1 and if the factor is mutated or silenced then it is 0. However, it can be in the range [0,...,1].

kapar_p,kapar_a,kapar_l	specify growth on the 'A' side parallel to the polariser and in the plane of the tissue
kbpar_p,kbpar_a,kbpar_l	specify growth on the 'B' side parallel to the polariser and in the plane of the tissue
kaper_p,kaper_a,kaper_l	specify growth on the 'A' side perpendicular to the polariser and in the plane of the tissue
kbper_p,kbper_a,kbper_l	specify growth on the 'B' side perpendicular to the polariser and in the plane of the tissue
knor_p,knor_a,knor_l]	specify growth normal to the plane of the tissue (i.e. thickness)

P	Polariser level.
strainret_p,strainret_a,strainret_l	a number between 0 (no strain retention, default) and 1 (full strain retention).
kbpar_p,kbpar_a,kbpar_l	a number between 0 (no overall inhibition of growth, default) and 1 (fully inhibited)