2014-07-09 21:14:17 +00:00
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/*
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* WorldEdit, a Minecraft world manipulation toolkit
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* Copyright (C) sk89q <http://www.sk89q.com>
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* Copyright (C) WorldEdit team and contributors
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*
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* This program is free software: you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by the
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* Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
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* for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.sk89q.worldedit.extent.transform;
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import com.sk89q.worldedit.Vector;
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import com.sk89q.worldedit.WorldEditException;
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import com.sk89q.worldedit.blocks.BaseBlock;
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import com.sk89q.worldedit.extent.AbstractDelegateExtent;
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import com.sk89q.worldedit.extent.Extent;
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import com.sk89q.worldedit.math.transform.Transform;
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import com.sk89q.worldedit.world.registry.BlockRegistry;
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import com.sk89q.worldedit.world.registry.State;
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import com.sk89q.worldedit.world.registry.StateValue;
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import javax.annotation.Nullable;
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import java.util.Map;
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import static com.google.common.base.Preconditions.checkNotNull;
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/**
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* Transforms blocks themselves (but not their position) according to a
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* given transform.
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*/
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public class BlockTransformExtent extends AbstractDelegateExtent {
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private static final double RIGHT_ANGLE = Math.toRadians(90);
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private final Transform transform;
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private final BlockRegistry blockRegistry;
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/**
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* Create a new instance.
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*
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* @param extent the extent
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* @param blockRegistry the block registry used for block direction data
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*/
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public BlockTransformExtent(Extent extent, Transform transform, BlockRegistry blockRegistry) {
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super(extent);
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checkNotNull(transform);
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checkNotNull(blockRegistry);
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this.transform = transform;
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this.blockRegistry = blockRegistry;
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}
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/**
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* Get the transform.
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*
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* @return the transform
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*/
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public Transform getTransform() {
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return transform;
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}
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/**
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* Transform a block without making a copy.
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*
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* @param block the block
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* @param reverse true to transform in the opposite direction
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* @return the same block
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*/
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private BaseBlock transformBlock(BaseBlock block, boolean reverse) {
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transform(block, reverse ? transform.inverse() : transform, blockRegistry);
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return block;
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}
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@Override
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public BaseBlock getBlock(Vector position) {
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return transformBlock(super.getBlock(position), false);
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}
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@Override
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public BaseBlock getLazyBlock(Vector position) {
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return transformBlock(super.getLazyBlock(position), false);
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}
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@Override
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public boolean setBlock(Vector location, BaseBlock block) throws WorldEditException {
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return super.setBlock(location, transformBlock(new BaseBlock(block), true));
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}
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/**
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* Transform the given block using the given transform.
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*
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* <p>The provided block is modified.</p>
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*
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* @param block the block
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* @param transform the transform
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* @param registry the registry
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* @return the same block
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*/
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private static BaseBlock transform(BaseBlock block, Transform transform, BlockRegistry registry) {
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return transform(block, transform, registry, block);
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}
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/**
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* Transform the given block using the given transform.
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*
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* @param block the block
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* @param transform the transform
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* @param registry the registry
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* @param changedBlock the block to change
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* @return the changed block
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*/
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private static BaseBlock transform(BaseBlock block, Transform transform, BlockRegistry registry, BaseBlock changedBlock) {
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checkNotNull(block);
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checkNotNull(transform);
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checkNotNull(registry);
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Map<String, ? extends State> states = registry.getStates(block);
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if (states == null) {
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return changedBlock;
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}
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for (State state : states.values()) {
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if (state.hasDirection()) {
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StateValue value = state.getValue(block);
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if (value != null && value.getDirection() != null) {
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StateValue newValue = getNewStateValue(state, transform, value.getDirection());
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if (newValue != null) {
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newValue.set(changedBlock);
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}
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}
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}
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}
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return changedBlock;
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}
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/**
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* Get the new value with the transformed direction.
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*
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* @param state the state
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* @param transform the transform
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* @param oldDirection the old direction to transform
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* @return a new state or null if none could be found
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*/
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@Nullable
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private static StateValue getNewStateValue(State state, Transform transform, Vector oldDirection) {
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2014-07-11 04:05:16 +00:00
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Vector newDirection = transform.apply(oldDirection).subtract(transform.apply(Vector.ZERO)).normalize();
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2014-07-09 21:14:17 +00:00
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StateValue newValue = null;
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double closest = -2;
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boolean found = false;
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for (StateValue v : state.valueMap().values()) {
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if (v.getDirection() != null) {
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double dot = v.getDirection().normalize().dot(newDirection);
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if (dot >= closest) {
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closest = dot;
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newValue = v;
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found = true;
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}
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}
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}
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if (found) {
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return newValue;
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} else {
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return null;
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}
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}
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}
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