/// <inheritdoc />
public override void RandomUpdate(World world, Vector3i position, uint data)
{
var age = (int)(data & 0b00_0111);
if (age < 7)
{
world.SetBlock(this.AsInstance((uint)(age + 1)), position);
}
else
{
if (!(world.GetBlock(position.Above())?.Block.IsReplaceable ?? false))
{
return;
}
var height = 0;
for (var offset = 0; offset < maxHeight; offset++)
{
if (world.GetBlock(position.Below(offset))?.Block == this)
{
height++;
}
else
{
break;
}
}
if (height < maxHeight)
{
Place(world, position.Above());
}
}
}
/// <summary>
/// Check if a given position has an opaque block above it.
/// </summary>
public static bool HasOpaqueTop(this World world, Vector3i position)
{
Block top = world.GetBlock(position.Above())?.Block ?? Block.Air;
return(top.IsSolidAndFull && top.IsOpaque ||
top is IHeightVariable);
}
/// <inheritdoc />
public bool Burn(World world, Vector3i position, Block fire)
{
world.SetBlock(GrassBurned.AsInstance(), position);
fire.Place(world, position.Above());
return(false);
}
/// <inheritdoc />
protected override void DoDestroy(World world, Vector3i position, uint data, PhysicsEntity?entity)
{
bool isBase = (data & 0b1) == 0;
world.SetDefaultBlock(position);
world.SetDefaultBlock(isBase ? position.Above() : position.Below());
}
/// <inheritdoc />
protected override void DoPlace(World world, Vector3i position, PhysicsEntity?entity)
{
bool isLowered = world.IsLowered(position);
uint data = (isLowered ? 1u : 0u) << 1;
world.SetBlock(this.AsInstance(data), position);
world.SetBlock(this.AsInstance(data | 1), position.Above());
}
/// <inheritdoc />
public override void BlockUpdate(World world, Vector3i position, uint data, BlockSide side)
{
var orientation = (Orientation)(data & 0b00_0011);
(Block block, uint dataAbove) = world.GetBlock(position.Above()) ?? BlockInstance.Default;
// If another block of this type is above, no solid block is required to hold.
if (block == this &&
orientation == (Orientation)(dataAbove & 0b00_0011))
{
return;
}
if (side == BlockSide.Top)
{
side = orientation.Opposite().ToBlockSide();
}
CheckBack(world, position, side, orientation, schedule: true);
}
/// <summary>
/// Check if a given position has a solid top above it.
/// </summary>
public static bool HasSolidTop(this World world, Vector3i position)
{
return(world.IsSolid(position.Above()));
}
/// <inheritdoc />
public override bool CanPlace(World world, Vector3i position, PhysicsEntity?entity)
{
return(world.GetBlock(position.Above())?.Block.IsReplaceable == true &&
(world.GetBlock(position.Below())?.Block ?? Air) is IPlantable);
}