Add Mineral Income

Complete Add Combat first. A mineral deposit will hold 1,000 stock. Each hit removes up to 3 stock and grants the same number of Minerals to the attacking player.

1. Define Minerals

Open Project Settings > Gameplay Tags and add SeinARTS.Resource.Minerals to the project’s gameplay-tag list. Save the tag to the project’s tag configuration.

Open Project Settings > Plugins > SeinARTS. Under Resource Catalog, add:

Field	Value
Resource Tag	SeinARTS.Resource.Minerals
Display Name	Minerals
Default Starting Value	500

The stockpile is uncapped. Restart Play after changing the catalog so new players receive the starting balance.

2. Create the deposit data

In Content/Demo/Blueprints, create a SeinARTS Entity Component named SC_DemoResourceComponent.

Add an Instance Editable Fixed Point variable named Remaining, default 1000. Compile and save.

Create a SeinARTS Entity using Generic Entity as its parent, named SBP_Resource_Minerals. On Sein Identity, set Display Name to Mineral Deposit.

Add a Static Mesh component using the engine Cube. Set its relative Location to (0, 0, 75) and Scale to (2, 2, 1.5). This gives a 200-by-200 footprint with its base at the actor origin.

Add Sein Extents with one Box shape: Half Extent (Forward) 100, Half Extent (Right) 100, and Height 150. Enable Collision, set Mobility to Static, and enable Blocks Nav. This creates a runtime obstacle that depletion can remove. Add SC_DemoResourceComponent. Compile and save.

3. Place map resources

Open LVL_DemoSkirmish. Place three SBP_Resource_Minerals instances on the floor inside the baked bounds, leaving room to walk around each one. These map-placed entities are neutral.

Put one deposit within 400 world units of the starting Soldier, so the first test does not depend on approaching an unseen target. Save the map. These deposits are authored map resources; player units continue to spawn from their player starts and production buildings.

4. Create Harvest

Create a Generic SeinARTS Ability named SA_Harvest, with Ability Name Harvest, Target Type Entity, Max Range 500, Out Of Range Behavior Auto Move Then, and Requires Line Of Sight enabled.

Set Granted Tags to SeinARTS.Ability.Harvest and Cancel Abilities With Tag to SeinARTS.Ability. This lets a new Harvest replace the previous run and lets Move interrupt harvesting.

Add TimeUntilShot as a Fixed Point variable. Set it to zero on On Activate and build the same On Tick timer from the combat chapter. Use the Soldier’s Damage and RateOfFire as the extraction amount and frequency: 3 Minerals per hit at 10 hits per second, or 30 Minerals per second while harvesting continuously.

Create TryHarvest as a non-latent function. Read the owner’s combat data and the target’s SC_DemoResourceComponent data through typed getters. End Ability if either read fails, Remaining is not positive, or Damage or RateOfFire is not positive. Cache Remaining as local OldRemaining.

In TryHarvest, add Make Sein Target Query and configure:

Input	Value
Instigator	Owner Entity
Range	Max Range
Required Component	Generated data struct for SC_DemoResourceComponent

Connect the query and Target Entity to Check Target. Switch on its result. Continue only on Eligible; every other result calls End Ability.

Apply Apply Field Delta to Target Entity, with that resource struct, Field Name Remaining, Delta 0 - Damage, and Clamp Min enabled at 0. End Ability on failure.

Calculate Extracted = OldRemaining - NewValue. If it is positive:

1. Add Make Sein Resource Cost.
2. Drag from its Amounts input and choose Make Map. The connection supplies the Gameplay Tag key and Fixed Point value types. Add one pair: SeinARTS.Resource.Minerals → Extracted.
3. Call Grant Income, with Player ID from Get Entity Owner on Owner Entity, and Amount from the struct you made.

Using the actual decrease prevents a final hit from awarding more Minerals than the deposit contains. The income belongs to the attacker, not the neutral deposit owner.

If Apply Field Delta reports At Min, destroy Target Entity and end the ability. Otherwise return.

Compile and save.

5. Map neutral clicks

Grant SA_Harvest on the Soldier’s Sein Abilities. Add a Default Commands entry:

Field	Value
Required Context	SeinARTS.Command.Context.RightClick and SeinARTS.Command.Context.Target.Neutral
Ability Tag	SeinARTS.Ability.Harvest
Priority	10

The resource-component check makes clicks on other neutral entities fail without granting income. Compile and save.

6. Check the extraction loop

Run Play Standalone and order the Soldier to harvest the nearby deposit. It should remain in range until the deposit is exhausted. Right-click ground during harvesting; it should stop extracting and move.

For a short depletion test, set that placed deposit’s Remaining to 25 before Play. Eight hits should extract 3 each, and the ninth should extract the remaining 1; then the deposit disappears. Reset Remaining to its inherited default after the test. The HUD in the next chapter makes the balance visible and lets you verify that it rises from 500 to 525.

Checkpoint

• Minerals exists in the resource catalog with a starting balance of 500.
• Neutral deposits contain their own Remaining stock.
• Harvest grants only the amount successfully removed from the target.
• Cancelling the order stops income, and depleted deposits disappear.

Continue with Build the HUD.