Modding:Añadir comportamiento a bloque

This page was last verified for Vintage Story version 1.9.

Introducción

Los comportamientos de bloque son útiles cuando se desea que diferentes bloques actúen de la misma manera, ya que se pueden adjuntar uno o más comportamientos de bloque a un número arbitrario de bloques. Puede que le interese echar un vistazo a las comportamientos de bloque existentes antes de implementar las suyas propias.

En este tutorial crearemos un nuevo comportamiento que podremos adjuntar a los bloques para hacerlos móviles haciendo clic con el botón derecho del ratón.

Configuración

Se requiere un espacio de trabajo de desarrollo. Además, necesitarás los recursos (tipo de bloque, textura y archivo lang). Se puede crear una propia o utilizar los que ya están hechos: Moving - No CS File.zip

Creación del comportamiento

Así que en primer lugar tenemos que crear el comportamiento en sí, que es una clase que extiende BlockBehavior

class Moving : BlockBehavior
{
    public Moving(Block block) : base(block)
    {
        
    } 
}

This class provides several methods we can override. When you use Visual Studio you can find a full list of a methods by hovering with the mouse of "BlockBehavior" and pressing "F12".

---

The method bool OnPlayerInteract(IWorldAccessor world, IPlayer byPlayer, BlockSelection blockSel, ref EnumHandling handling) looks to be ideal for our purpose.

What should it do?

1. Calculate the new position of the block depending on the face the player is looking at
2. Check if the block can be placed at this position
3. Remove the original block
4. Place the new block using the previously calculated position

    public override bool OnPlayerInteract(IWorldAccessor world, IPlayer byPlayer, BlockSelection blockSel, ref EnumHandling handling)
    {
        // Find the target position
        BlockPos pos = blockSel.Position.AddCopy(blockSel.Face.GetOpposite());

        // Can we place the block there?
        if (world.BlockAccessor.GetBlock(pos).IsReplacableBy(block))
        {
            // Remove the block at the current position and place it at the target position
            world.BlockAccessor.SetBlock(0, blockSel.Position);
            world.BlockAccessor.SetBlock(block.BlockId, pos);
        }

        // Notify the game engine other block behaviors that we handled the players interaction with the block.
        // If we would not set the handling field the player would still be able to place blocks if he has them in hands.
        handling = EnumHandling.PreventDefault;
        return true;
    }

Register

In order the register the BlockBehavior we need to create a mod class, override Start(ICoreAPI) and register it with the given name:

    public class MovingBlocks : ModSystem
    {

        public override void Start(ICoreAPI api)
        {
            base.Start(api);
            api.RegisterBlockBehaviorClass("Moving", typeof(Moving));
        }

    }

Distribution

In order to finish everything, open the modtools and type in pack <your mod id>. Now you can take the zip file and share it with other people.

• for VS 1.9: Moving_v1.0.0.zip
• for VS 1.6: Moving.zip

Advanced Behavior

Our behavior is still rather simple, but there are a lot more possibilities. A behavior can have special properties, which can be defined by the blocktype itself.

Example

The behavior liquid supports some special properties as shown in this example of the water blocktype:

	behaviors: [
		{
			name: "FiniteSpreadingLiquid", 
			properties:
			{
				spreadDelay: 150, 
				liquidCollisionSound: "hotmetal", 
				sourceReplacementCode: "obsidian", 
				flowingReplacementCode: "basalt"
			}
		}
	],

Parsing properties

In order to take care of special properties there is a method called Initialize(JsonObject). Each blocktype creates a new instance of the behavior, so the method can be used to parse the properties.

So what kind of properties could we add?

• push distance
• pull block if player is sneaking

First of all, we need to override the method in our block behavior class ...

        public override void Initialize(JsonObject properties)
        {
            base.Initialize(properties);
        }

Additionally we need to add two fields, one for the distance and another one if the player should pull the block while sneaking ...

        public int distance = 1;
        public bool pull = false;

Now we can parse the two properties like so:

        distance = properties["distance"].AsInt(1);
        pull = properties["pull"].AsBool(false);

---

The next thing we need to change is the interact method itself, so that it takes care of the distance and the pull properties ...

        public override bool OnPlayerInteract(IWorldAccessor world, IPlayer byPlayer, BlockSelection blockSel, ref EnumHandling handling)
        {
            BlockPos pos = blockSel.Position.AddCopy(pull && byPlayer.WorldData.EntityControls.Sneak ? blockSel.Face : blockSel.Face.GetOpposite(), distance);
            if (world.BlockAccessor.GetBlock(pos).IsReplacableBy(block))
            {
                world.BlockAccessor.SetBlock(0, blockSel.Position);
                world.BlockAccessor.SetBlock(block.BlockId, pos);
            }
            handling = EnumHandling.PreventDefault;
            return true;
        }

Adding another block

Let's create another block using this behavior, but this time we will configure some additional properties ...

	behaviors: [
		{
			name: "Moving",
			properties: {
				"distance": 2,
				"pull": true
			}
		}
	],

The block will be pushed two blocks instead of one and the player can pull it by sneaking while right clicking.

Mod Download

• for VS 1.9: AdvancedMoving_v1.0.0.zip
• for VS 1.6: AdvancedMoving.zip

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