How to add new Derived Stat tutorial

[dmbrown]

Sure. Here is the code I took from Ikael's extension to try to get to work:

<root version="3.0">
	<properties>
		<name>Realms of Cthulhu</name>
		<version>1.7</version>
		<author>Aki Heikkinen (Ikael)</author>
		<description>Realms of Cthulhu Derived Stats and Madness</description>
		<ruleset>
			<name>SavageWorlds</name>
		</ruleset>
		<ruleset>
			<name>SWD</name>
		</ruleset>
		<loadorder>15</loadorder>
	</properties>
	<announcement text="Realms of Cthulhu v1.7" font="emotefont" icon="wildcard" />
	<base>
		<script name="RealmsOfCthulhuLauncher" file="launcher.lua"/>
		<icon name="indicator_penalty_madness" file="indicator_penalty_madness.png" />
		<template name="derivedstat_sanity">
			<derbase>
				<setup>
					<attribute>	
						<half>spirit</half>
					</attribute>
					<modifier>2</modifier>
					<node>
					<!--<modifier>corruption</modifier>-->
						<subtract>5</subtract>
					</node>
					<!--<subtraction>corruption</subtraction>-->
				</setup>
			</derbase>
		</template>
		<template name="ct_derivedstats">  
			<ct_derivedstats_base>
				<entryColumns>5</entryColumns>
			</ct_derivedstats_base>
		</template>
		<template name="ct_damagetypetitles">
			<ct_damagetypetitles_base>
				<entryWidth>32</entryWidth>
			</ct_damagetypetitles_base>
		</template>
		<template name="ct_client_damagetypetitles">
			<ct_damagetypetitles_base>
				<entryWidth>32</entryWidth>
			</ct_damagetypetitles_base>
		</template>
	</base>
</root>

You can see all the things I tried to do. There weren't any subtraction tags mentioned in Ikael's post, but I gave it a shot. The modifier tag only ever seems to add. I am trying to take half of spirt add 2 and then subtract the corruption derived stat. Thanks in advance for any help.

[Mike Serfass]

According to post 2 & 3, you can reference a derived stat.
To subtract, multiple by -1 then add that. So try

<multiplier>-1</multiplier>

then

<modifier>derivedstat_corruption</modifier>

assuming that it can take a reference to a number in addition to a hard-coded number.
If the node doesn't work with a reference to a value, try adding type="number" to modifier like this

<modifier type="number">derivedstat_corruption</modifier>

[dmbrown]

Thanks for the help and the great extensions you make.

The code snippets did not work and it appears if you put a "-" in front of the number/variable it will just ignore it. So it seems maybe you can't subtract.