CRIME!!! + C# Generics

I added Arson and added a Police manager that goes out and solves these crimes. Lots more to come, let me know of any ideas you have!

But before that let me teach you ALL something.

C# Generics.

I had a bunch of scripts that all did ABOUT the same thing but with different.

This was FindClosestHospital, FindClosestFireStation and the thing I was adding which was FindClosestPoliceStation.

It felt quire redundant to copy the same lines but instead of Hopsital it was replaced with FireStation or PoliceStation.

    //Generic functions
    private T FindClosestReachableService<T>(Vector2Int targetPos, Func<T, bool> hasAvailableVehicles, out List<Vector2Int> bestRoute) where T : Building
    {
        T closestBuilding = null;
        bestRoute = null;
        int shortestRouteLength = int.MaxValue;
        bool foundBuildingOfThisType = false;

        foreach (var kvp in gridManager.GetMapGrid())
        {
            GridManager.GridTile tile = kvp.Value;

            if (tile.buildingScript != null && tile.buildingScript is T serviceBuilding)
            {
                foundBuildingOfThisType = true;

                if (!hasAvailableVehicles(serviceBuilding)) continue;

                List<Vector2Int> testRoute = CalculateRoadPath(tile.buildingScript.gridPos, targetPos);

                if (testRoute == null || testRoute.Count == 0) continue;

                if (testRoute.Count < shortestRouteLength)
                {
                    shortestRouteLength = testRoute.Count;
                    bestRoute = testRoute;
                    closestBuilding = serviceBuilding;
                }
            }
        }

        if (!foundBuildingOfThisType)
        {
            bestRoute = null;
            return null;
        }

        return closestBuilding;
    }

Above is an example of the C# generic.

We have “T” type, and I think this is a good place to learn about them.

Instead of defining the function as returning something like Building, we make T a type. and you can see it passed in a little <T> after the function name. We can also pass in entire functions like Func<T, bool> which is utilised as shown below:

Building bestStation = FindClosestReachableService<PoliceStation>(building.gridPos, ps => ps.HasPolice(), out route);

you can see ps => ps.HasPolice() calls that out. And finally, to define what T is meant to be, I’ve added where T : Building.

You can do this many times, such as by having both a T as well as a U! and you’d have a repeated where T : Building where U: PotatoChips or something idk what U is meant to be bro.

This was my first time using it but it’s pretty cool and if you’re using C# I’d recommend learning it as it saved me like 200 lines of code and changing something 3 times to change the same thing!

And yes, I added a third thing which is Arson! which is a crime based thing, and you have a visual that shows up as a timer. if a police doesn’t solve the crime it sets on fire. It’s not too bad but it adds a use for the police, with much more to come for the police to deal with in the future!

Also added asteroid BOMBARDMENT as a debuff. Yeah it’s brutal. 3 strikes… thats up to 108 tiles DESTROYED and set on fire.

And of course, the image is from a youtube video:

Click me!