Performing calculations in unitdefs

[Forboding Angel]

Is this something that should be done in post?

I essentially want to take a units total damage, divide it by 20 and set that as the energy cost, for pretty much all units, but in a lot of ways it would be better if the calculation could be done in the unitdef (giving me more direct control than having to define a table of units to ignore in weapondefs post).

Any thoughts on the best way to go about doing it?

[FLOZi]

Code: Select all

local HP = 100

local fooDef = {
  ...
  maxHealth = HP,
  energycost = HP / 20,
  ...
}
return lowerkeys({ ["foo"] = fooDef })

Or do it in _post but have it triggered by a customParam rather than white/blacklisting.

[Forboding Angel]

Ahh ok. As a quick test I did this in post:

Code: Select all

  
weapondamage = tonumber(wd.damage.default)
 energycost = wd.energyPerShot
if (weapondamage > 0) then
	energycost = 1 * 0 + weapondamage / 20 --fugly math to make 100% sure that the original value is zeroed out so no surprises
end
Spring.Echo(wd.name, energycost)

And it works:

Code: Select all

[f=0000000] elighttank3weapon, 2.1500000953674

But when I fire the weapon, it uses the value that is set in the weapondef (30), not the value calculated in post. I was thinking that maybe I'm setting the wrong param, but I don't see how that would be so. I looked up energyPerShot in the wiki and didn't see any lua name alternative or anything funky like that. Am I missing something here?

I'll check out your method flozi, thanks

[Forboding Angel]

Your method works perfectly. Can you not declare locals in tables? I guess not. For some reason I was thinking you could.

Anyway, this gives me ideas for how I can automate some things.

This is essentially what I ended up with:

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local weapon1Damage = 43

local weaponDefs = {
  lighttankweapon = {
    badTargetCategory = [[ARMORED BUILDING]],
    AreaOfEffect       = 1,
	avoidFriendly      = false,
    avoidFeature       = false,
	collideFriendly    = false,
    collideFeature     = false,
    craterBoost        = 0,
    craterMult         = 0,
    explosionGenerator = "custom:genericshellexplosion-medium-lightning",
	energypershot      = weapon1Damage / 20,
    impulseBoost       = 0,
    impulseFactor      = 0,
    interceptedByShieldType = 4,
    lineOfSight        = true,
	name			   = "elighttank3weapon",
    noSelfDamage       = true,
    range              = 500,
    reloadtime         = 1,
    WeaponType         = "LightningCannon",
    rgbColor           = "0.1 0.2 0.5",
    rgbColor2          = "0 0 1",
    soundStart         = "jacobs.wav",
    startsmoke         = "1",
    texture1           = "lightning",
    thickness          = 5,
    turret             = true,
    weaponVelocity     = 400,
	customparams = {
	  damagetype		= "elighttank3",
	  
	  --Upgrades--
	  upgradeClass		= "groundweapons",
    },      
    damage = {
      default           = weapon1Damage,
    },
  },
}
unitDef.weaponDefs = weaponDefs

It struck me that it might be a good idea to have a lot of this in configs. Like common weapon things, but tbh for now this works perfectly. I'd much rather it be on a per unit basis other than in post, because something like this in post could easily get very tedious to maintain.

[FLOZi]

Hodor, clear misunderstanding of what you meant but yes will work just as well for weapons.

No, you cannot declare variables within a table.

Not sure what you are doing in _post, there.

[Forboding Angel]

In post I was trying to do exactly what I'm doing in the weapondef.

Sorry, my weapondefs are in the unitdef file. Topic title fail.

For the sake of interest, I also use the same calculation for shields:

Code: Select all

local shield1PowerRegen = 25

local weaponDefs = {
  shield = {
	IsShield         = true,
    Smartshield      = true,
    Exteriorshield   = true,
    Visibleshield    = true,
    Visibleshieldrepulse = true,
    ShieldStartingPower = 0,
    Shieldenergyuse  = 0,
    Shieldradius     = 200,
    Shieldpower      = 1000,
    Shieldpowerregen = shield1PowerRegen,
    Shieldpowerregenenergy = shield1PowerRegen / 20,
    Shieldintercepttype = 4,
    Shieldgoodcolor  = "0.0 0.2 1.0",
    Shieldbadcolor   = "1.0 0 0",
    Shieldalpha      = 0.3,
    ShieldRepulsor   = false,
	texture1		 = "shield4",
    visibleShieldHit = true,
    visibleShieldHitFrames = 50,
    weaponType       = [[Shield]],
    damage = {
      default            = 1,
    },
  },
}
unitDef.weaponDefs = weaponDefs

In evo, energy = damage
energy = metal

So technically, to do 2000 damage, it costs you 10 metal.