74 lines
2.4 KiB
Java
74 lines
2.4 KiB
Java
/*
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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.function.visitor;
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import static com.google.common.base.Preconditions.checkNotNull;
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import java.util.Collection;
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import com.sk89q.worldedit.Vector;
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import com.sk89q.worldedit.function.RegionFunction;
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import com.sk89q.worldedit.function.mask.Mask;
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import com.sk89q.worldedit.function.operation.Operations;
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/**
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* Visits adjacent points on the same X-Z plane as long as the points
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* pass the given mask, and then executes the provided region
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* function on the entire column.
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*
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* <p>This is used by {@code //fill}.</p>
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*/
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public class DownwardVisitor extends RecursiveVisitor {
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private final int baseY;
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/**
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* Create a new visitor.
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*
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* @param mask the mask
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* @param function the function
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* @param baseY the base Y
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*/
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public DownwardVisitor(final Mask mask, final RegionFunction function, final int baseY) {
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super(mask, function);
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checkNotNull(mask);
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this.baseY = baseY;
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final Collection<Vector> directions = getDirections();
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directions.clear();
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directions.add(new Vector(1, 0, 0));
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directions.add(new Vector(-1, 0, 0));
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directions.add(new Vector(0, 0, 1));
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directions.add(new Vector(0, 0, -1));
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directions.add(new Vector(0, -1, 0));
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}
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@Override
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protected boolean isVisitable(final Vector from, final Vector to) {
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final int fromY = from.getBlockY();
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return ((fromY == baseY) || (to.subtract(from).getBlockY() < 0)) && super.isVisitable(from, to);
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}
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public static Class<?> inject() {
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return Operations.class;
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}
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}
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