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Events/BlockEvent (view source)

Revision as of 18:46, 20 April 2021

756 bytes added ,  18:46, 20 April 2021
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public void onBlockBreak(final BlockEvent.BreakEvent event)
 
public void onBlockBreak(final BlockEvent.BreakEvent event)
 
     {
 
     {
 +
        IWorld world = event.getWorld();
 
         if (!world.isClientSide() && event.getState().is(Blocks.SAND)) // use the base event to get the state and see what it is
 
         if (!world.isClientSide() && event.getState().is(Blocks.SAND)) // use the base event to get the state and see what it is
 
         {
 
         {
 
             event.setExpToDrop(10); // change the amount of experience we'll be dropping
 
             event.setExpToDrop(10); // change the amount of experience we'll be dropping
 
             PlayerEntity player = event.getPlayer();
 
             PlayerEntity player = event.getPlayer();
−
             if (player.getUseItem().getItem().is(Tags.Items.SHEARS)) // check if the player is holding shears
+
             if (player.getMainHandItem().getItem().equals(Items.DIAMOND_SHOVEL)) // check what we're holding
 
             {
 
             {
−
                 ItemHandlerHelper.giveItemToPlayer(player, new ItemStack(Items.BONE)); // give a bone to the player!
+
                 ItemHandlerHelper.giveItemToPlayer(player, new ItemStack(Items.BONE)); // give a bone
 
             }
 
             }
 
         }
 
         }
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Example usage:
 
Example usage:
 
<syntaxhighlight lang="java">
 
<syntaxhighlight lang="java">
−
public void onEntityPlace(final BlockEvent.BreakEvent event)
+
public void onEntityPlace(final BlockEvent.EntityPlaceEvent event)
 
     {
 
     {
−
         Entity entity = event.getEntity();
+
         IWorld world = event.getWorld();
−
         if (!world.isClientSide() && entity != null) // check if the entity is null
+
         if (!world.isClientSide() && event.getEntity() instanceof EndermanEntity)
 
         {
 
         {
−
             Block block = event.getState().getBlock(); // get the block that was placed
+
             event.setCanceled(true); // prevent enderman placement
−
            if (entity instanceof PlayerEntity && block.is(Blocks.FROSTED_ICE))
  −
            {
  −
                event.setCanceled(true); // cancel the placing
  −
                event.getWorld().setBlock(event.getPos(), Blocks.COBBLESTONE.defaultBlockState(), 3); // set cobble instead
  −
            }
   
         }
 
         }
 
     }
 
     }
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Example usage:
 
Example usage:
 
<syntaxhighlight lang="java">
 
<syntaxhighlight lang="java">
−
public void onNeighborNotify(final BlockEvent.BreakEvent event)
+
public void onNeighborNotify(final BlockEvent.NeighborNotifyEvent event)
 
     {
 
     {
 +
        IWorld world = event.getWorld();
 
         if (world.isClientSide()) return;
 
         if (world.isClientSide()) return;
 
         BlockPos eventPos = event.getPos();
 
         BlockPos eventPos = event.getPos();
−
         for (Direction direction : event.getNotifiedSides()) // cycle through notified directions
+
         if (event.getState().is(Blocks.REDSTONE_WIRE)) // only do it for redstone
 
         {
 
         {
−
             BlockPos pos = eventPos.relative(direction); // move to the direction given
+
             for (Direction direction : event.getNotifiedSides()) // cycle through notified directions
−
             double x = pos.getX() + 0.5D; // move to center of the block
+
             {
−
            double y = pos.getY() + 0.5D;
+
                BlockPos pos = eventPos.relative(direction); // move to that spot
−
            double z = pos.getZ() + 0.5D;
+
                if (world.isEmptyBlock(pos))
−
            // add particle
+
                {
−
            event.getWorld().addParticle(ParticleTypes.CLOUD, x, y, z, 0.0D, 0.0D, 0.0D);
+
                    world.setBlock(pos, Blocks.GLOWSTONE.defaultBlockState(), 3); // place glowstone
 +
                }
 +
            }
 
         }
 
         }
 
     }
 
     }
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* Making a block update detector block
 
* Making a block update detector block
   −
== CreateFluidSourceEvent ==
+
==CreateFluidSourceEvent==
 
This event controls creation of fluid sources. This is different than cancellable events, because it has a <code>Result</code>. Setting it to <code>ALLOW</code> causes a source block to created, even if that's not normally what would happen. Setting it to <code>DENY</code> always prevents source creation.
 
This event controls creation of fluid sources. This is different than cancellable events, because it has a <code>Result</code>. Setting it to <code>ALLOW</code> causes a source block to created, even if that's not normally what would happen. Setting it to <code>DENY</code> always prevents source creation.
    
Example usage:
 
Example usage:
 
<syntaxhighlight lang="java">
 
<syntaxhighlight lang="java">
−
public void onNeighborNotify(final BlockEvent.BreakEvent event)
+
public void onFluidSourceCreate(final BlockEvent.CreateFluidSourceEvent event)
 
     {
 
     {
 +
        IWorldReader world = event.getWorld();
 
         if (!world.isClientSide() && event.getPos().getY() > 100)
 
         if (!world.isClientSide() && event.getPos().getY() > 100)
 
         {
 
         {
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Example usage:
 
Example usage:
 
<syntaxhighlight lang="java">
 
<syntaxhighlight lang="java">
−
public void onBreak(final BlockEvent.BreakEvent event)
+
public void onFluidPlace(final BlockEvent.FluidPlaceBlockEvent event)
 
     {
 
     {
 +
        IWorld world = event.getWorld();
 
         if (world.isClientSide()) return;
 
         if (world.isClientSide()) return;
 
         BlockState newState = event.getNewState();
 
         BlockState newState = event.getNewState();
−
         if (newState.is(Blocks.FIRE))
+
         if (newState.is(Blocks.COBBLESTONE) && world.dayTime() > 14000L)
−
        {
  −
            event.setCanceled(true); // prevent fire placing from lava
  −
        }
  −
        else if (newState.is(Blocks.COBBLESTONE) && event.getWorld().dayTime() > 14000L)
   
         {
 
         {
 
             event.setNewState(Blocks.ANDESITE.defaultBlockState()); // change the block if done during nighttime.
 
             event.setNewState(Blocks.ANDESITE.defaultBlockState()); // change the block if done during nighttime.
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public void onCropGrowPre(final BlockEvent.CropGrowEvent.Pre event)
 
public void onCropGrowPre(final BlockEvent.CropGrowEvent.Pre event)
 
     {
 
     {
 +
        IWorld world = event.getWorld();
 
         if (world.isClientSide()) return;
 
         if (world.isClientSide()) return;
 
         BlockState state = event.getState();
 
         BlockState state = event.getState();
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         else if (state.is(Blocks.BAMBOO))
 
         else if (state.is(Blocks.BAMBOO))
 
         {
 
         {
−
             if (event.getWorld().getRandom().nextFloat() > 0.2F) // take a 4/5 chance
+
             if (world.getRandom().nextFloat() > 0.2F) // take a 4/5 chance
 
             {
 
             {
 
                 event.setResult(Event.Result.DENY); // make bamboo grow less often
 
                 event.setResult(Event.Result.DENY); // make bamboo grow less often
 +
            }
 +
        }
 +
    }
 +
 +
public void onCropsGrowPost(final BlockEvent.CropGrowEvent.Post event)
 +
    {
 +
        IWorld world = event.getWorld();
 +
        if (!world.isClientSide() && event.getState().is(Blocks.WHEAT)) // check wheat
 +
        {
 +
            BlockState newState = event.getState();
 +
            if (newState.is(Blocks.WHEAT)) // defensive check to make sure we can do this
 +
            {
 +
                world.setBlock(event.getPos(), newState.setValue(CropsBlock.AGE, 7), 3); // set max growth wheat
 
             }
 
             }
 
         }
 
         }
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public void onTrample(final BlockEvent.FarmlandTrampleEvent event)
 
public void onTrample(final BlockEvent.FarmlandTrampleEvent event)
 
     {
 
     {
 +
        IWorld world = event.getWorld();
 
         if (!world.isClientSide() && event.getFallDistance() < 10.0F)
 
         if (!world.isClientSide() && event.getFallDistance() < 10.0F)
 
         {
 
         {
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This is mostly used for preventing portal spawning in certain dimensions (even the overworld).
 
This is mostly used for preventing portal spawning in certain dimensions (even the overworld).
 +
 +
Example usage:
 +
<syntaxhighlight lang="java">
 +
public void onPortalLight(final BlockEvent.PortalSpawnEvent event)
 +
    {
 +
        event.setCanceled(true);
 +
    }
 +
</syntaxhighlight>
    
== BlockToolInteractEvent ==
 
== BlockToolInteractEvent ==
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<code>setFinalState()</code>: Set what you want the result to be.
 
<code>setFinalState()</code>: Set what you want the result to be.
   −
<code>getFinalState()</code>: Returns what it will be changed to.
+
<code>getFinalState()</code>: Returns what it will be changed to. This will normally just return whatever the original block is unless you or another modder has set it. It can't check, for example, if something *will* turn into farmland in the future.
    
Example usage:
 
Example usage:
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public void onToolInteract(final BlockEvent.BlockToolInteractEvent event)
 
public void onToolInteract(final BlockEvent.BlockToolInteractEvent event)
 
     {
 
     {
−
         if (!world.isClientSide() && event.getFinalState().is(Blocks.FARMLAND) && event.getHeldItemStack().getItem() == Items.NETHERITE_HOE)
+
        IWorld world = event.getWorld();
 +
         if (!world.isClientSide() && event.getHeldItemStack().getItem() == Items.NETHERITE_HOE)
 
         {
 
         {
−
             event.setFinalState(Blocks.NETHERRACK.defaultBlockState()); // change the final state under certain conditions
+
             event.setFinalState(Blocks.NETHERRACK.defaultBlockState()); // set the block to netherrack
 +
            // note that this happens for any right click on a block, not just dirt
 
         }
 
         }
 
     }
 
     }
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