Examples of org.terasology.world.block.BlockComponent

org.terasology.world.block.BlockComponent
Used for entities representing a block in the world @author Immortius

            }
            if (rand.nextFloat() < 0.5f) {
                entityData.add(new InventoryComponent());
            }
            if (rand.nextFloat() < 0.25f) {
                entityData.add(new BlockComponent());
            }
            rawEntityData.add(entityData);
        }


        entityManager = new PojoEntityManager();

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     * @param blockEntity The entity to update
     * @param oldType     The previous type of the block
     * @param type        The new type of the block
     */
    private void updateBlockEntityComponents(EntityRef blockEntity, Block oldType, Block type, Set<Class<? extends Component>> retainComponents) {
        BlockComponent blockComponent = blockEntity.getComponent(BlockComponent.class);


        Prefab oldPrefab = Assets.getPrefab(oldType.getPrefab());
        EntityBuilder oldEntityBuilder = entityManager.newBuilder(oldPrefab);
        oldEntityBuilder.addComponent(new BlockComponent(oldType, new Vector3i(blockComponent.getPosition())));
        BeforeEntityCreated oldEntityEvent = new BeforeEntityCreated(oldPrefab, oldEntityBuilder.iterateComponents());
        blockEntity.send(oldEntityEvent);
        for (Component comp : oldEntityEvent.getResultComponents()) {
            oldEntityBuilder.addComponent(comp);
        }


        Prefab newPrefab = Assets.getPrefab(type.getPrefab());
        EntityBuilder newEntityBuilder = entityManager.newBuilder(newPrefab);
        newEntityBuilder.addComponent(new BlockComponent(type, new Vector3i(blockComponent.getPosition())));
        BeforeEntityCreated newEntityEvent = new BeforeEntityCreated(newPrefab, newEntityBuilder.iterateComponents());
        blockEntity.send(newEntityEvent);
        for (Component comp : newEntityEvent.getResultComponents()) {
            newEntityBuilder.addComponent(comp);
        }


        for (Component component : blockEntity.iterateComponents()) {
            if (!COMMON_BLOCK_COMPONENTS.contains(component.getClass())
                    && !entityManager.getComponentLibrary().getMetadata(component.getClass()).isRetainUnalteredOnBlockChange()
                    && !newEntityBuilder.hasComponent(component.getClass()) && !retainComponents.contains(component.getClass())) {
                blockEntity.removeComponent(component.getClass());
            }
        }




        blockComponent.setBlock(type);
        blockEntity.saveComponent(blockComponent);


        HealthComponent health = blockEntity.getComponent(HealthComponent.class);
        if (health == null && type.isDestructible()) {
            blockEntity.addComponent(new HealthComponent(type.getHardness(), type.getHardness() / BLOCK_REGEN_SECONDS, 1.0f));

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    }


    private EntityRef createBlockEntity(Vector3i blockPosition, Block block) {
        EntityBuilder builder = entityManager.newBuilder(block.getPrefab());
        builder.addComponent(new LocationComponent(blockPosition.toVector3f()));
        builder.addComponent(new BlockComponent(block, blockPosition));
        if (block.isDestructible() && !builder.hasComponent(HealthComponent.class)) {
            // Block regen should always take the same amount of time,  regardless of its hardness 
            builder.addComponent(new HealthComponent(block.getHardness(), block.getHardness() / BLOCK_REGEN_SECONDS, 1.0f));
        }
        boolean isTemporary = isTemporaryBlock(builder, block);

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        return false;
    }


    @ReceiveEvent(components = {BlockComponent.class})
    public void onActivateBlock(OnActivatedComponent event, EntityRef entity) {
        BlockComponent block = entity.getComponent(BlockComponent.class);
        EntityRef oldEntity = blockEntityLookup.put(new Vector3i(block.getPosition()), entity);
        // If this is a client, then an existing block entity may exist. Destroy it.
        if (oldEntity != null && !Objects.equal(oldEntity, entity)) {
            oldEntity.destroy();
        }
    }

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        }
    }


    @ReceiveEvent(components = {BlockComponent.class})
    public void onDeactivateBlock(BeforeDeactivateComponent event, EntityRef entity) {
        BlockComponent block = entity.getComponent(BlockComponent.class);
        Vector3i pos = new Vector3i(block.getPosition());
        if (blockEntityLookup.get(pos) == entity) {
            blockEntityLookup.remove(pos);
        }
    }

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    }


    @Override
    public void onEntityComponentRemoved(EntityRef entity, Class<? extends Component> component) {
        if (entityManager.getComponentLibrary().getMetadata(component).isForceBlockActive()) {
            BlockComponent blockComp = entity.getComponent(BlockComponent.class);
            if (blockComp != null) {
                Block block = getBlock(blockComp.getPosition().x, blockComp.getPosition().y, blockComp.getPosition().z);
                if (isTemporaryBlock(entity, block, component)) {
                    temporaryBlockEntities.add(entity);
                }
            }
        }

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        BlockItemComponent blockItem = item.getComponent(BlockItemComponent.class);
        BlockFamily type = blockItem.blockFamily;
        Side surfaceSide = Side.inDirection(event.getHitNormal());
        Side secondaryDirection = TeraMath.getSecondaryPlacementDirection(event.getDirection(), event.getHitNormal());


        BlockComponent blockComponent = event.getTarget().getComponent(BlockComponent.class);
        if (blockComponent == null) {
            // If there is no block there (i.e. it's a BlockGroup, we don't allow placing block, try somewhere else)
            event.consume();
            return;
        }
        Vector3i targetBlock = blockComponent.getPosition();
        Vector3i placementPos = new Vector3i(targetBlock);
        placementPos.add(surfaceSide.getVector3i());


        Block block = type.getBlockForPlacement(worldProvider, blockEntityRegistry, placementPos, surfaceSide, secondaryDirection);

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        for (EntityRef entity : entityManager.getEntitiesWith(HealthComponent.class, BlockComponent.class)) {
            HealthComponent health = entity.getComponent(HealthComponent.class);
            if (health.currentHealth == health.maxHealth) {
                continue;
            }
            BlockComponent blockComp = entity.getComponent(BlockComponent.class);
            renderHealth(blockComp.getPosition(), health, cameraPosition);
        }
        for (EntityRef entity : entityManager.getEntitiesWith(BlockRegionComponent.class, HealthComponent.class)) {
            HealthComponent health = entity.getComponent(HealthComponent.class);
            if (health.currentHealth == health.maxHealth) {
                continue;

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