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141 lines
3.9 KiB
Java
141 lines
3.9 KiB
Java
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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
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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.operation;
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import com.sk89q.worldedit.*;
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import com.sk89q.worldedit.blocks.BaseBlock;
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import com.sk89q.worldedit.blocks.BlockID;
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/**
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* An abstract implementation of {@link com.sk89q.worldedit.operation.FlatRegionFunction}
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* that searches for the ground, which is considered to be any non-air block.
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*/
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public abstract class GroundFindingFunction implements FlatRegionFunction {
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private final EditSession editSession;
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private int lowerY;
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private int upperY;
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/**
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* Create a new instance.
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*
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* @param editSession the edit session
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* @param lowerY the lower Y
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* @param upperY the upper Y (lowerY <= upperY)
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*/
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protected GroundFindingFunction(EditSession editSession, int lowerY, int upperY) {
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this.editSession = editSession;
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this.lowerY = lowerY;
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this.upperY = upperY;
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checkYBounds();
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}
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/**
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* Check whether upperY is >= lowerY.
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*/
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private void checkYBounds() {
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if (upperY < lowerY) {
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throw new IllegalArgumentException("upperY must be greater than or equal to lowerY");
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}
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}
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/**
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* Get the upper Y coordinate to start the ground search from.
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*
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* @return the upper Y coordinate
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*/
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public int getUpperY() {
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return upperY;
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}
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/**
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* Set the upper Y coordinate to start the ground search from.
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*
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* @param upperY the upper Y coordinate
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*/
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public void setUpperY(int upperY) {
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this.upperY = upperY;
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checkYBounds();
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}
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/**
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* Get the lower Y coordinate to end the ground search at.
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*
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* @return lowerY the lower Y coordinate
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*/
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public int getLowerY() {
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return lowerY;
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}
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/**
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* Set the lower Y coordinate to end the ground search at.
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*
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* @return lowerY the lower Y coordinate
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*/
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public void setLowerY(int lowerY) {
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this.lowerY = lowerY;
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checkYBounds();
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}
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@Override
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public final boolean apply(Vector2D pt) throws WorldEditException {
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// Don't want to be in the ground
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if (!editSession.getBlock(pt.toVector(upperY)).isAir()) {
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return false;
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}
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if (!shouldContinue(pt)) {
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return false;
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}
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for (int y = upperY; y >= lowerY; --y) {
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Vector testPt = pt.toVector(y);
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BaseBlock block = editSession.getBlock(testPt);
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if (block.getType() != BlockID.AIR) {
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return apply(testPt, block);
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}
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}
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return false;
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}
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/**
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* Returns whether a search for the ground should be performed for the given point.
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*
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* @param pt the point
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* @return true if the search should begin
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*/
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protected boolean shouldContinue(Vector2D pt) {
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return true;
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}
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/**
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* Apply the function to the given ground block.
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*
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* @param pt the position
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* @param block the block
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* @return true if something was changed
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* @throws WorldEditException thrown on an error
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*/
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protected abstract boolean apply(Vector pt, BaseBlock block) throws WorldEditException;
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}
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