Resource consumption example code

[fatcargo]

Can anyone reply with example source on how to write a resource consumer code ?

I need it in form of custom code that will both consume a resource under specific conditions and manage loading/saving to/from persistence and vessel cfg (i already know how to handle load/save, i just mentioned it so it may be known in advance what my code needs to do).

And if resource generation is also not so much different from consumption code,  an example for that too would be appreciated.

Edited November 5, 2017 by fatcargo

[Aelfhe1m]

Here's a bare skeleton. You'll also need to add code to handle turning the isRunning flag on/off etc. Persistence of resource values is automatic so no need to add anything for that.

public class MyPart : PartModule
{
	[KSPField(isPersistant = true, guiName = "Running", guiActive =true)]
	public bool isRunning;
	
	[KSPField]
	public string requiredResourceName = "ElectricCharge";
	
	[KSPField]
    public double powerConsumption = 10f; // 10 units/s
	
	void FixedUpdate()
	{
		if (isRunning)
		{
			// power consumption
			var required = TimeWarp.deltaTime * powerConsumption;
			if (ResourceAvailable(requiredResourceName) > required)
				RequestResource(requiredResourceName, required);
			else
				OnNoPower();
		}
	}
	
	private double ResourceAvailable(string resource)
	{
		var res = PartResourceLibrary.Instance.GetDefinition(resource);
		double amount, maxAmount;
		part.GetConnectedResourceTotals(res.id, out amount, out maxAmount);
		return amount;
	}

	private float RequestResource(string resource, double amount)
	{
		var res = PartResourceLibrary.Instance.GetDefinition(resource);
		return (float)this.part.RequestResource(res.id, amount);
	}
	
	private void OnNoPower()
	{
		ScreenMessages.PostScreenMessage($"Not enough {requiredResourceName}"), 5f, ScreenMessageStyle.UPPER_CENTER);
		isRunning = false;
	}
}

Note this is not optimised. Caching the resource getdefinition would be one place to start.

[fatcargo]

Thanks ! Will play around with this before implementing.