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Changed how ground finding operations were implemented.

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This commit is contained in:
sk89q 2014-03-28 16:13:27 -07:00
parent e5e5d8901a
commit 60b839ed09
10 changed files with 382 additions and 358 deletions
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36
src/main/java/com/sk89q/worldedit/EditSession.java
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@ -40,11 +40,14 @@ import com.sk89q.worldedit.regions.CuboidRegion;
import com.sk89q.worldedit.regions.EllipsoidRegion;
import com.sk89q.worldedit.regions.Region;
import com.sk89q.worldedit.regions.RegionOperationException;
import com.sk89q.worldedit.regions.search.GroundSearch;
import com.sk89q.worldedit.regions.search.MaskingGroundSearch;
import com.sk89q.worldedit.shape.ArbitraryBiomeShape;
import com.sk89q.worldedit.shape.ArbitraryShape;
import com.sk89q.worldedit.shape.RegionShape;
import com.sk89q.worldedit.shape.WorldEditExpressionEnvironment;
import com.sk89q.worldedit.util.TreeGenerator;
import com.sk89q.worldedit.util.noise.RandomNoise;
import com.sk89q.worldedit.visitor.DownwardVisitor;
import com.sk89q.worldedit.visitor.FlatRegionVisitor;
import com.sk89q.worldedit.visitor.RecursiveVisitor;
@ -552,7 +555,7 @@ public class EditSession {
public int countBlocks(Region region, Set<BaseBlock> searchBlocks) {
FuzzyBlockMask mask = new FuzzyBlockMask(searchBlocks);
BlockCount count = new BlockCount();
RegionMaskFilter filter = new RegionMaskFilter(this, mask, count);
RegionMaskingFilter filter = new RegionMaskingFilter(this, mask, count);
RegionVisitor visitor = new RegionVisitor(region, filter);
OperationHelper.completeBlindly(visitor); // We can't throw exceptions, nor do we expect any
return count.getCount();
@ -977,7 +980,7 @@ public class EditSession {
checkNotNull(pattern);
BlockReplace replace = new BlockReplace(this, pattern);
RegionMaskFilter filter = new RegionMaskFilter(this, mask, replace);
RegionMaskingFilter filter = new RegionMaskingFilter(this, mask, replace);
RegionVisitor visitor = new RegionVisitor(region, filter);
OperationHelper.completeLegacy(visitor);
return visitor.getAffected();
@ -2045,13 +2048,20 @@ public class EditSession {
position.add(-apothem, -5, -apothem),
position.add(apothem, 10, apothem));
// And we want to scatter them
GroundScatterFunction scatter = new GroundScatterFunction(this, generator);
scatter.setDensity(0.02);
scatter.setRange(region);
int lowerY = region.getMinimumPoint().getBlockY();
int upperY = region.getMaximumPoint().getBlockY();
double density = 0.02;
// We want to find the ground
GroundSearch search = new MaskingGroundSearch(this, new ExistingBlockMask());
GroundFunction groundFunction = new GroundFunction(search, lowerY, upperY, generator);
// We don't want to place a patch in every column
Mask2D mask = new NoiseFilter2D(new RandomNoise(), density);
FlatRegionMaskingFilter filter = new FlatRegionMaskingFilter(this, mask, groundFunction);
// Generate those patches!
FlatRegionVisitor operation = new FlatRegionVisitor(region, scatter);
FlatRegionVisitor operation = new FlatRegionVisitor(region, filter);
OperationHelper.completeLegacy(operation);
return operation.getAffected();
@ -2122,16 +2132,14 @@ public class EditSession {
throws WorldEditException {
ForestGenerator generator = new ForestGenerator(this, treeGenerator);
// And we want to scatter them
GroundScatterFunction scatter = new GroundScatterFunction(this, generator);
scatter.setDensity(density);
scatter.setRange(lowerY, upperY);
GroundSearch search = new MaskingGroundSearch(this, new ExistingBlockMask());
GroundFunction groundFunction = new GroundFunction(search, lowerY, upperY, generator);
Mask2D mask = new NoiseFilter2D(new RandomNoise(), density);
FlatRegionMaskingFilter filter = new FlatRegionMaskingFilter(this, mask, groundFunction);
int affected = 0;
for (Vector2D pt : it) {
if (scatter.apply(pt)) {
if (filter.apply(pt)) {
affected++;
}
}

42
src/main/java/com/sk89q/worldedit/commands/RegionCommands.java
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@ -31,8 +31,15 @@ import com.sk89q.worldedit.filtering.GaussianKernel;
import com.sk89q.worldedit.filtering.HeightMapFilter;
import com.sk89q.worldedit.generator.FloraGenerator;
import com.sk89q.worldedit.generator.ForestGenerator;
import com.sk89q.worldedit.masks.ExistingBlockMask;
import com.sk89q.worldedit.masks.Mask2D;
import com.sk89q.worldedit.masks.NoiseFilter2D;
import com.sk89q.worldedit.operation.FlatRegionMaskingFilter;
import com.sk89q.worldedit.operation.GroundFunction;
import com.sk89q.worldedit.regions.search.GroundSearch;
import com.sk89q.worldedit.regions.search.MaskingGroundSearch;
import com.sk89q.worldedit.util.noise.RandomNoise;
import com.sk89q.worldedit.visitor.FlatRegionVisitor;
import com.sk89q.worldedit.operation.GroundScatterFunction;
import com.sk89q.worldedit.masks.Mask;
import com.sk89q.worldedit.operation.OperationHelper;
import com.sk89q.worldedit.patterns.Pattern;
@ -543,16 +550,18 @@ public class RegionCommands {
Region region = session.getSelection(player.getWorld());
// We want to generate trees
ForestGenerator generator = new ForestGenerator(editSession, new TreeGenerator(type));
// And we want to scatter them
GroundScatterFunction scatter = new GroundScatterFunction(editSession, generator);
scatter.setDensity(density);
scatter.setRange(region);
int lowerY = region.getMinimumPoint().getBlockY();
int upperY = region.getMaximumPoint().getBlockY();
// Generate that forest
FlatRegionVisitor operation = new FlatRegionVisitor(region, scatter);
GroundSearch search = new MaskingGroundSearch(editSession, new ExistingBlockMask());
GroundFunction groundFunction = new GroundFunction(search, lowerY, upperY, generator);
Mask2D mask = new NoiseFilter2D(new RandomNoise(), density);
FlatRegionMaskingFilter filter = new FlatRegionMaskingFilter(editSession, mask, groundFunction);
// Execute
FlatRegionVisitor operation = new FlatRegionVisitor(region, filter);
OperationHelper.complete(operation);
player.print(operation.getAffected() + " trees created.");
@ -571,17 +580,18 @@ public class RegionCommands {
double density = args.argsLength() > 0 ? args.getDouble(0) / 100 : 0.1;
Region region = session.getSelection(player.getWorld());
// We want to generate flora
FloraGenerator generator = new FloraGenerator(editSession);
// And we want to scatter them
GroundScatterFunction scatter = new GroundScatterFunction(editSession, generator);
scatter.setDensity(density);
scatter.setRange(region);
int lowerY = region.getMinimumPoint().getBlockY();
int upperY = region.getMaximumPoint().getBlockY();
// Generate that flora
FlatRegionVisitor operation = new FlatRegionVisitor(region, scatter);
GroundSearch search = new MaskingGroundSearch(editSession, new ExistingBlockMask());
GroundFunction groundFunction = new GroundFunction(search, lowerY, upperY, generator);
Mask2D mask = new NoiseFilter2D(new RandomNoise(), density);
FlatRegionMaskingFilter filter = new FlatRegionMaskingFilter(editSession, mask, groundFunction);
// Execute
FlatRegionVisitor operation = new FlatRegionVisitor(region, filter);
OperationHelper.complete(operation);
player.print(operation.getAffected() + " flora created.");

62
src/main/java/com/sk89q/worldedit/operation/FlatRegionMaskingFilter.java Normal file
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@ -0,0 +1,62 @@
/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q <http://www.sk89q.com>
* Copyright (C) WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.worldedit.operation;
import com.sk89q.worldedit.EditSession;
import com.sk89q.worldedit.Vector2D;
import com.sk89q.worldedit.WorldEditException;
import com.sk89q.worldedit.masks.Mask2D;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* Passes calls to {@link #apply(com.sk89q.worldedit.Vector2D)} to the
* delegate {@link com.sk89q.worldedit.operation.FlatRegionFunction} if they
* match the given mask.
*/
public class FlatRegionMaskingFilter implements FlatRegionFunction {
private final EditSession editSession;
private final FlatRegionFunction function;
private Mask2D mask;
/**
* Create a new masking filter.
*
* @param editSession the edit session
* @param mask the mask
* @param function the delegate function to call
*/
public FlatRegionMaskingFilter(EditSession editSession, Mask2D mask, FlatRegionFunction function) {
checkNotNull(function);
checkNotNull(editSession);
checkNotNull(mask);
this.editSession = editSession;
this.mask = mask;
this.function = function;
}
@Override
public boolean apply(Vector2D position) throws WorldEditException {
return mask.matches(editSession, position) && function.apply(position);
}
}

188
src/main/java/com/sk89q/worldedit/operation/GroundFindingFunction.java
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@ -1,188 +0,0 @@
/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q <http://www.sk89q.com>
* Copyright (C) WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.worldedit.operation;
import com.sk89q.worldedit.EditSession;
import com.sk89q.worldedit.Vector;
import com.sk89q.worldedit.Vector2D;
import com.sk89q.worldedit.WorldEditException;
import com.sk89q.worldedit.blocks.BaseBlock;
import com.sk89q.worldedit.blocks.BlockID;
import com.sk89q.worldedit.regions.Region;
/**
* An abstract implementation of {@link com.sk89q.worldedit.operation.FlatRegionFunction}
* that searches for the first "ground" block." A ground block is found when the
* method {@link #shouldPassThrough(Vector, BaseBlock)} returns false, which, by default,
* does so for all non-air blocks.
* <p>
* This function starts from the provided upperY in each block column and traverses
* down the column until it finds the first ground block, at which point
* {@link #apply(Vector, BaseBlock)} is called with the position and the
* {@link BaseBlock} for the found ground block. Implementations that want
* to skip certain columns (and avoid the ground search) can override
* {@link #shouldContinue(com.sk89q.worldedit.Vector2D)} and return true as necessary.
*/
public abstract class GroundFindingFunction implements FlatRegionFunction {
private final EditSession editSession;
private int lowerY;
private int upperY;
/**
* Create a new instance.
*
* @param editSession the edit session
*/
protected GroundFindingFunction(EditSession editSession) {
this.editSession = editSession;
checkYBounds();
}
/**
* Check whether upperY is >= lowerY.
*/
private void checkYBounds() {
if (upperY < lowerY) {
throw new IllegalArgumentException("upperY must be greater than or equal to lowerY");
}
}
/**
* Get the upper Y coordinate to start the ground search from.
*
* @return the upper Y coordinate
*/
public int getUpperY() {
return upperY;
}
/**
* Get the lower Y coordinate to end the ground search at.
*
* @return lowerY the lower Y coordinate
*/
public int getLowerY() {
return lowerY;
}
/**
* Set the range of Y coordinates to perform a search for ground within.
*
* @param lowerY the lower Y coordinate
* @param upperY the upper Y coordinate (upperY >= lowerY)
*/
public void setRange(int lowerY, int upperY) {
this.lowerY = lowerY;
this.upperY = upperY;
checkYBounds();
}
/**
* Set the range of Y coordinates to perform a search for ground within from
* the minimum and maximum Y of the given region.
*
* @param region the region
*/
public void setRange(Region region) {
setRange(region.getMinimumPoint().getBlockY(), region.getMaximumPoint().getBlockY());
}
/**
* Increase the upper Y by the given amount.
*
* @param y the amount to increase the upper Y by
*/
public void raiseCeiling(int y) {
if (y <= 0) {
throw new IllegalArgumentException("Can't raise by a negative");
}
upperY += y;
}
@Override
public final boolean apply(Vector2D pt) throws WorldEditException {
// Don't want to be in the ground
if (!editSession.getBlock(pt.toVector(upperY + 1)).isAir()) {
return false;
}
if (!shouldContinue(pt)) {
return false;
}
for (int y = upperY + 1; y >= lowerY; --y) {
Vector testPt = pt.toVector(y);
BaseBlock block = editSession.getBlock(testPt);
if (!shouldPassThrough(testPt, block)) {
return apply(testPt, block);
}
}
return false;
}
/**
* Returns whether a search for the ground should be performed for the given
* column. Return false if the column is to be skipped.
*
* @param pt the point
* @return true if the search should begin
*/
protected boolean shouldContinue(Vector2D pt) {
return true;
}
/**
* Returns whether the given block should be "passed through" when
* conducting the ground search.
* <p>
* Examples of blocks where this method could return true include snow, tall
* grass, shrubs, and flowers. Note that this method will also receive
* calls on each air block so that condition must be handled. Be aware
* that blocks passed through are not automatically removed
* from the world, so implementations may need to remove the block
* immediately above the ground.
* <p>
* The default implementation only returns true for air blocks.
*
* @param position the position
* @param block the block
* @return true if the block should be passed through during the ground search
*/
protected boolean shouldPassThrough(Vector position, BaseBlock block) {
return block.getType() == BlockID.AIR;
}
/**
* Apply the function to the given ground block.
* <p>
* Naive implementations may provide flowers, tall grass, and other
* blocks not often considered to be the ground as the ground block.
*
* @param position the position
* @param block the block
* @return true if something was changed
* @throws WorldEditException thrown on an error
*/
protected abstract boolean apply(Vector position, BaseBlock block) throws WorldEditException;
}

64
src/main/java/com/sk89q/worldedit/operation/GroundFunction.java Normal file
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@ -0,0 +1,64 @@
/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q <http://www.sk89q.com>
* Copyright (C) WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.worldedit.operation;
import com.sk89q.worldedit.Vector;
import com.sk89q.worldedit.Vector2D;
import com.sk89q.worldedit.WorldEditException;
import com.sk89q.worldedit.regions.search.GroundSearch;
import static com.google.common.base.Preconditions.checkArgument;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* Accepts 2D coordinates to columns, finds the first ground block in each
* column, and applies the given {@link RegionFunction} onto the ground blocks.
*/
public class GroundFunction implements FlatRegionFunction {
private final RegionFunction function;
private GroundSearch groundSearch;
private int minY;
private int maxY;
/**
* Create a new instance.
*
* @param groundSearch the ground search implementation
* @param minY the minimum Y (inclusive)
* @param maxY the maximum Y (inclusive)
* @param function the function to apply on ground blocks
*/
public GroundFunction(GroundSearch groundSearch, int minY, int maxY, RegionFunction function) {
checkNotNull(function);
checkNotNull(groundSearch);
checkArgument(minY <= maxY, "minY <= maxY required");
this.function = function;
this.groundSearch = groundSearch;
this.minY = minY;
this.maxY = maxY;
}
@Override
public boolean apply(Vector2D pt) throws WorldEditException {
Vector ground = groundSearch.findGround(pt.toVector(maxY), minY);
return ground != null && function.apply(ground);
}
}

128
src/main/java/com/sk89q/worldedit/operation/GroundScatterFunction.java
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@ -1,128 +0,0 @@
/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q <http://www.sk89q.com>
* Copyright (C) WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.worldedit.operation;
import com.sk89q.worldedit.EditSession;
import com.sk89q.worldedit.Vector;
import com.sk89q.worldedit.Vector2D;
import com.sk89q.worldedit.WorldEditException;
import com.sk89q.worldedit.blocks.BaseBlock;
import com.sk89q.worldedit.noise.NoiseGenerator;
import com.sk89q.worldedit.noise.RandomNoise;
/**
* Randomly applies the given {@link RegionFunction} onto random ground blocks.
* <p>
* This class can be used to generate a structure randomly over an area.
*/
public class GroundScatterFunction extends GroundFindingFunction {
private NoiseGenerator noiseGenerator;
private RegionFunction function;
private double density;
/**
* Create a new instance using a {@link RandomNoise} as the noise generator.
*
* @param editSession the edit session
* @param function the function
*/
public GroundScatterFunction(EditSession editSession, RegionFunction function) {
this(editSession, function, new RandomNoise());
}
/**
* Create a new instance.
*
* @param editSession the edit session
* @param function the function
*/
public GroundScatterFunction(EditSession editSession, RegionFunction function, NoiseGenerator noiseGenerator) {
super(editSession);
this.function = function;
this.noiseGenerator = noiseGenerator;
}
/**
* Get the density (0 <= density <= 1) which indicates the threshold that
* must be met for the function to be applied to a column.
*
* @return the density
*/
public double getDensity() {
return density;
}
/**
* Set the density (0 <= density <= 1) which indicates the threshold that
* must be met for the function to be applied to a column.
*
* @param density the density
*/
public void setDensity(double density) {
this.density = density;
}
/**
* Get the noise generator.
*
* @return the noise generator
*/
public NoiseGenerator getNoiseGenerator() {
return noiseGenerator;
}
/**
* Set the noise generator.
*
* @param noiseGenerator the noise generator
*/
public void setNoiseGenerator(NoiseGenerator noiseGenerator) {
this.noiseGenerator = noiseGenerator;
}
/**
* Get the function to apply.
*
* @return the region function
*/
public RegionFunction getFunction() {
return function;
}
/**
* Set the function to apply.
*
* @param function the region function
*/
public void setFunction(RegionFunction function) {
this.function = function;
}
@Override
protected boolean shouldContinue(Vector2D pt) {
return noiseGenerator.noise(pt) <= density;
}
@Override
protected boolean apply(Vector position, BaseBlock block) throws WorldEditException {
return function.apply(position);
}
}

29
src/main/java/com/sk89q/worldedit/operation/RegionMaskFilter.java → src/main/java/com/sk89q/worldedit/operation/RegionMaskingFilter.java
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@ -27,18 +27,27 @@ import com.sk89q.worldedit.masks.Mask;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* Passes positions that match the given mask onto the provided function.
* Passes calls to {@link #apply(com.sk89q.worldedit.Vector)} to the
* delegate {@link com.sk89q.worldedit.operation.RegionFunction} if they
* match the given mask.
*/
public class RegionMaskFilter implements RegionFunction {
public class RegionMaskingFilter implements RegionFunction {
private final EditSession editSession;
private final Mask mask;
private final RegionFunction function;
private Mask mask;
public RegionMaskFilter(EditSession editSession, Mask mask, RegionFunction function) {
checkNotNull(function, "function must not be null");
checkNotNull(editSession, "editSession must not be null");
checkNotNull(mask, "mask must not be null");
/**
* Create a new masking filter.
*
* @param editSession the edit session
* @param mask the mask
* @param function the function
*/
public RegionMaskingFilter(EditSession editSession, Mask mask, RegionFunction function) {
checkNotNull(function);
checkNotNull(editSession);
checkNotNull(mask);
this.editSession = editSession;
this.mask = mask;
@ -47,11 +56,7 @@ public class RegionMaskFilter implements RegionFunction {
@Override
public boolean apply(Vector position) throws WorldEditException {
if (mask.matches(editSession, position)) {
return function.apply(position);
} else {
return false;
}
return mask.matches(editSession, position) && function.apply(position);
}
}

76
src/main/java/com/sk89q/worldedit/regions/search/AbstractGroundSearch.java Normal file
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@ -0,0 +1,76 @@
/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q <http://www.sk89q.com>
* Copyright (C) WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.worldedit.regions.search;
import com.sk89q.worldedit.Vector;
import static com.google.common.base.Preconditions.checkArgument;
import static net.minecraft.util.com.google.common.base.Preconditions.checkNotNull;
/**
* Utility class for finding the first ground block starting from a certain
* position and traversing down.
*/
public abstract class AbstractGroundSearch implements GroundSearch {
/**
* Returns whether the given block should be "passed through" when
* conducting the ground search.
*
* @param position return whether the given block is the ground
* @return true if the search should stop
*/
protected abstract boolean isGround(Vector position);
/**
* Find the ground block starting from the given position and traversing
* downward until reaching minY (inclusive).
* </p>
* The highest ground block that may be returned is at the location of
* the origin location. The lowest ground block that may be returned is
* in the same column as the origin but with y = minY.
* </p>
* It is possible for no ground block to be found if the given origin
* block is underground to begin with.
*
* @param origin the origin
* @param minY the minimum Y to end the search at
* @return the location of a ground block, or null if none was found
*/
public Vector findGround(Vector origin, int minY) {
checkNotNull(origin);
checkArgument(minY <= origin.getBlockY(), "minY <= origin Y");
// Don't want to be in the ground
if (isGround(origin.add(0, 1, 0))) {
return null;
}
for (int y = origin.getBlockY() + 1; y >= minY; --y) {
Vector test = origin.setY(y);
if (isGround(test)) {
return test;
}
}
return null;
}
}

47
src/main/java/com/sk89q/worldedit/regions/search/GroundSearch.java Normal file
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@ -0,0 +1,47 @@
/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q <http://www.sk89q.com>
* Copyright (C) WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.worldedit.regions.search;
import com.sk89q.worldedit.Vector;
/**
* Given a column of blocks in the world, finds the first ground block
* starting from a given Y.
*/
public interface GroundSearch {
/**
* Find the ground block starting from the given position and traversing
* downward until reaching minY (inclusive).
* </p>
* The highest ground block that may be returned is at the location of
* the origin location. The lowest ground block that may be returned is
* in the same column as the origin but with y = minY.
* </p>
* It is possible for no ground block to be found if the given origin
* block is underground.
*
* @param origin the origin
* @param minY the minimum Y to end the search at
* @return the location of a ground block, or null if none was found
*/
Vector findGround(Vector origin, int minY);
}

68
src/main/java/com/sk89q/worldedit/regions/search/MaskingGroundSearch.java Normal file
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/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q <http://www.sk89q.com>
* Copyright (C) WorldEdit team and contributors
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package com.sk89q.worldedit.regions.search;
import com.sk89q.worldedit.EditSession;
import com.sk89q.worldedit.Vector;
import com.sk89q.worldedit.masks.Mask;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* A ground finder that uses a {@link com.sk89q.worldedit.masks.Mask} to determine
* ground blocks.
*/
public class MaskingGroundSearch extends AbstractGroundSearch {
private final EditSession editSession;
private final Mask mask;
/**
* Create a new instance.
* </p>
* If a mask that matches non-ground blocks is available, it can be inverted with
* {@link com.sk89q.worldedit.masks.InvertedMask}.
*
* @param editSession an edit session
* @param mask a mask that matches ground blocks
*/
public MaskingGroundSearch(EditSession editSession, Mask mask) {
checkNotNull(editSession);
checkNotNull(mask);
this.editSession = editSession;
this.mask = mask;
}
/**
* Get the mask that matches ground blocks.
*
* @return the mask
*/
public Mask getMask() {
return mask;
}
@Override
protected boolean isGround(Vector position) {
return mask.matches(editSession, position);
}
}