Overriding a derived field

[frumple]

Is there a way to override the value in a derived field?

I am working on defining a dragon's age catagories via a configurable tab. I have gotten it working except for displaying the starting HP. I want the value of that field to be dependent on which age catagory the user selects.

Here is the code I have tried (the script is within the base dragon race which the user selcted via theBackground tab... in this case Dragon, Black).

Final Phase/10000

~ adjust starting HP for base dragon race

var ageCat as number
ageCat = tagvalue[Value.?]

if (ageCat = 1) then
 field[rHPStart].value = 26
elseif (ageCat = 2) then
 field[rHPStart].value = 39
elseif (ageCat = 3) then
 field[rHPStart].value = 52
elseif (ageCat = 4) then
 field[rHPStart].value = 65
elseif (ageCat = 5) then
 field[rHPStart].value = 78
elseif (ageCat = 6) then
 field[rHPStart].value = 91
elseif (ageCat = 7) then
 field[rHPStart].value = 104
elseif (ageCat = 8) then
 field[rHPStart].value = 117
elseif (ageCat = 9) then
 field[rHPStart].value = 130
elseif (ageCat = 10) then
 field[rHPStart].value = 143
elseif (ageCat = 11) then
 field[rHPStart].value = 156
elseif (ageCat = 12) then
 field[rHPStart].value = 169
endif

[Mathias]

rHPStart is only checked when the race is first added to the character - before any scripts are run, so, while you can change it later, it won't alter the race's hit points, because they've already been set.

[frumple]

Ah. How about cHP?

[Mathias]

Not recommended, becuse if you change a value that the user's allowed to change using a script, the user can no longer change it, meaning EVERY Adult Copper Dragon has 172 HP.

[frumple]

Ah yes that would be bad.