/*
* Copyright 2013 MovingBlocks
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.terasology.world.block.items;
import org.terasology.utilities.Assets;
import org.terasology.audio.AudioManager;
import org.terasology.audio.events.PlaySoundEvent;
import org.terasology.entitySystem.entity.EntityRef;
import org.terasology.entitySystem.event.ReceiveEvent;
import org.terasology.entitySystem.systems.BaseComponentSystem;
import org.terasology.entitySystem.systems.RegisterMode;
import org.terasology.entitySystem.systems.RegisterSystem;
import org.terasology.logic.characters.KinematicCharacterMover;
import org.terasology.logic.common.ActivateEvent;
import org.terasology.logic.inventory.ItemComponent;
import org.terasology.math.AABB;
import org.terasology.math.ChunkMath;
import org.terasology.math.Side;
import org.terasology.math.geom.Vector3f;
import org.terasology.math.geom.Vector3i;
import org.terasology.network.NetworkSystem;
import org.terasology.physics.Physics;
import org.terasology.physics.StandardCollisionGroup;
import org.terasology.registry.CoreRegistry;
import org.terasology.registry.In;
import org.terasology.world.BlockEntityRegistry;
import org.terasology.world.WorldProvider;
import org.terasology.world.block.Block;
import org.terasology.world.block.BlockComponent;
import org.terasology.world.block.entity.placement.PlaceBlocks;
import org.terasology.world.block.family.BlockFamily;
/**
*/
// TODO: Predict placement client-side (and handle confirm/denial)
@RegisterSystem(RegisterMode.AUTHORITY)
public class BlockItemSystem extends BaseComponentSystem {
/**
* Margin and other allowed penedration is also 0.03 or 0.04.
* Since precision is only float it needs to be that high.
*/
private static final float ADDITIONAL_ALLOWED_PENETRATION = 0.4f;
@In
private WorldProvider worldProvider;
@In
private BlockEntityRegistry blockEntityRegistry;
@In
private AudioManager audioManager;
@In
private NetworkSystem networkSystem;
@ReceiveEvent(components = {BlockItemComponent.class, ItemComponent.class})
public void onPlaceBlock(ActivateEvent event, EntityRef item) {
if (!event.getTarget().exists()) {
event.consume();
return;
}
BlockItemComponent blockItem = item.getComponent(BlockItemComponent.class);
BlockFamily type = blockItem.blockFamily;
Side surfaceSide = Side.inDirection(event.getHitNormal());
Side secondaryDirection = ChunkMath.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);
if (canPlaceBlock(block, targetBlock, placementPos)) {
// TODO: Fix this for changes.
if (networkSystem.getMode().isAuthority()) {
PlaceBlocks placeBlocks = new PlaceBlocks(placementPos, block, event.getInstigator());
worldProvider.getWorldEntity().send(placeBlocks);
if (!placeBlocks.isConsumed()) {
item.send(new OnBlockItemPlaced(placementPos, blockEntityRegistry.getBlockEntityAt(placementPos)));
} else {
event.consume();
}
}
event.getInstigator().send(new PlaySoundEvent(Assets.getSound("engine:PlaceBlock").get(), 0.5f));
} else {
event.consume();
}
}
private boolean canPlaceBlock(Block block, Vector3i targetBlock, Vector3i blockPos) {
if (block == null) {
return false;
}
Block centerBlock = worldProvider.getBlock(targetBlock.x, targetBlock.y, targetBlock.z);
if (!centerBlock.isAttachmentAllowed()) {
return false;
}
Block adjBlock = worldProvider.getBlock(blockPos.x, blockPos.y, blockPos.z);
if (!adjBlock.isReplacementAllowed() || adjBlock.isTargetable()) {
return false;
}
if (block.getBlockFamily().equals(adjBlock.getBlockFamily())) {
return false;
}
// Prevent players from placing blocks inside their bounding boxes
if (!block.isPenetrable()) {
Physics physics = CoreRegistry.get(Physics.class);
AABB blockBounds = block.getBounds(blockPos);
Vector3f min = new Vector3f(blockBounds.getMin());
Vector3f max = new Vector3f(blockBounds.getMax());
/**
* Characters can enter other solid objects/blocks for certain amount. This is does to detect collsion
* start and end without noise. So if the user walked as close to a block as possible it is only natural
* to let it place a block exactly above it even if that technically would mean a collision start.
*/
min.x += KinematicCharacterMover.HORIZONTAL_PENETRATION;
max.x -= KinematicCharacterMover.HORIZONTAL_PENETRATION;
min.y += KinematicCharacterMover.VERTICAL_PENETRATION;
max.y -= KinematicCharacterMover.VERTICAL_PENETRATION;
min.z += KinematicCharacterMover.HORIZONTAL_PENETRATION;
max.z -= KinematicCharacterMover.HORIZONTAL_PENETRATION;
/*
* Calculations aren't exact and in the corner cases it is better to let the user place the block.
*/
float additionalAllowedPenetration = 0.04f; // ignore small rounding mistakes
min.add(ADDITIONAL_ALLOWED_PENETRATION, ADDITIONAL_ALLOWED_PENETRATION, ADDITIONAL_ALLOWED_PENETRATION);
max.sub(ADDITIONAL_ALLOWED_PENETRATION, ADDITIONAL_ALLOWED_PENETRATION, ADDITIONAL_ALLOWED_PENETRATION);
AABB newBounds = AABB.createMinMax(min, max);
return physics.scanArea(newBounds, StandardCollisionGroup.DEFAULT, StandardCollisionGroup.CHARACTER).isEmpty();
}
return true;
}
}