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65 lines
2.3 KiB
Java
65 lines
2.3 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
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* it under the terms of the GNU General Public License as published by
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* the 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,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU 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;
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import com.sk89q.worldedit.Vector;
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import com.sk89q.worldedit.Vector2D;
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import com.sk89q.worldedit.WorldEditException;
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import com.sk89q.worldedit.regions.search.GroundSearch;
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import static com.google.common.base.Preconditions.checkArgument;
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import static com.google.common.base.Preconditions.checkNotNull;
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/**
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* Accepts 2D coordinates to columns, finds the first ground block in each
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* column, and applies the given {@link RegionFunction} onto the ground blocks.
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*/
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public class GroundFunction implements FlatRegionFunction {
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private final RegionFunction function;
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private GroundSearch groundSearch;
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private int minY;
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private int maxY;
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/**
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* Create a new instance.
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*
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* @param groundSearch the ground search implementation
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* @param minY the minimum Y (inclusive)
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* @param maxY the maximum Y (inclusive)
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* @param function the function to apply on ground blocks
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*/
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public GroundFunction(GroundSearch groundSearch, int minY, int maxY, RegionFunction function) {
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checkNotNull(function);
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checkNotNull(groundSearch);
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checkArgument(minY <= maxY, "minY <= maxY required");
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this.function = function;
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this.groundSearch = groundSearch;
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this.minY = minY;
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this.maxY = maxY;
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}
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@Override
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public boolean apply(Vector2D pt) throws WorldEditException {
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Vector ground = groundSearch.findGround(pt.toVector(maxY), minY);
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return ground != null && function.apply(ground);
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}
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}
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