EDF item effects and inventory

Define what happens when an item is picked up (and eventually, used or dropped from the inventory - this is not complete yet).

For information on progress in current development, see weapons-branch.

There are many different types of item effect definitions:

artifact

An artifact is an item which, when collected, goes into the player's inventory.

artifact <name>
{
 amount         <int> // amount gained with one pickup
 maxamount      <int> // max amount that can be carried in inventory
 interhubamount <int> // max amount carryable between levels in different hubs;
                      // -1 if this field should not apply at all
 sortorder      <int> // key used for sorting the player's inventory
 icon           <str> // name of icon graphic for invbar (currently unused)
 usesound       <str> // sound made when item is used (currently unused)
 useeffect      <str> // name of item effect to use for activation (unused)
 
 [+-]undroppable      // if +, cannot be dropped from inventory
 [+-]invbar           // if +, appears in invbar; otherwise, invisible
 [+-]keepdepleted     // if +, will remain in inventory with amount of zero
 [+-]fullamountonly   // if +, cannot pickup unless full amount is needed
 
 // artifacttype determines what sort of artifact this is.  
 artifacttype   <str> // "Normal", "Ammo", "Key", "Puzzle", "Power", "Weapon",
                      // or "Quest"
                      
 // The following fields apply only to certain artifact types. They have no
 // effect if specified on other types.
 
 // Ammo
 ammo.backpackamount    <int> // amount of this ammo type given by a Backpack
 ammo.backpackmaxamount <int> // max amount after collecting a Backpack
}

healtheffect

A health effect gives the player health in one of many possible ways.

healtheffect <name>
{
 amount     <int> // amount of health to give
 maxamount  <int> // max amount this item can health to; if player has greater
                  // health, the item cannot be picked up at all.
 lowmessage <str> // alternate message to give instead of pickupfx message when
                  // health is < amount; if starts with $, is a BEX mnemonic.
 
 [+-]alwayspickup  // if +, item is picked up even when unneeded (ie Health Bonus)
 [+-]sethealth     // if +, item SETS health rather than adding to it (ie Megasphere)
}

armoreffect

An armor effect defines the properties of player armor

armoreffect <name>
{
 saveamount    <int> // amount of armor given
 savefactor    <int> // numerator of fraction determining save percentage
 savedivisor   <int> // denominator of fraction determining save percentage
 maxsaveamount <int> // max amount his item can give; if player has greater
                     // armor, the item cannot be picked up at all
                     
 [+-]alwayspickup    // item is picked up even when unneeded (ie Armor Bonus)
 [+-]bonus           // if +, is a bonus (adds to current armor type without
                     // changing the protective qualities)
}

ammoeffect

Ammo givers give an Ammo type artifact to the player.

ammoeffect <name>
{
 ammo       <str> // Name of an Ammo-type artifact definition
 amount     <int> // Amount to give for an ordinary pickup
 dropamount <int> // Amount to give if dropped by an enemy
 
 [+-]ignoreskill  // if +, does not double on skills that give double ammo  
}