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Blazingly fast Minecraft world manipulation for artists, builders and everyone else.
/*
* WorldEdit, a Minecraft world manipulation toolkit
* Copyright (C) sk89q
* 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 .
*/
package com.sk89q.worldedit.function.mask;
import com.sk89q.worldedit.math.BlockVector2;
import com.sk89q.worldedit.math.BlockVector3;
import javax.annotation.Nullable;
import static com.google.common.base.Preconditions.checkNotNull;
/**
* Various utility functions related to {@link Mask} and {@link Mask2D}.
*/
public final class Masks {
static final AlwaysTrue ALWAYS_TRUE = new AlwaysTrue();
static final AlwaysFalse ALWAYS_FALSE = new AlwaysFalse();
private Masks() {
}
/**
* Return a 3D mask that always returns true.
*
* @return a mask
*/
public static Mask alwaysTrue() {
return ALWAYS_TRUE;
}
//FAWE start
public static Mask alwaysFalse() {
return ALWAYS_FALSE;
}
//FAWE end
/**
* Return a 2D mask that always returns true.
*
* @return a mask
*/
public static Mask2D alwaysTrue2D() {
return ALWAYS_TRUE;
}
//FAWE start
/**
* Negate the given mask.
*
* @param mask the mask
* @return a new mask
*/
public static Mask negate(final Mask mask) {
return mask.inverse();
}
//FAWE end
/**
* Negate the given mask.
*
* @param mask the mask
* @return a new mask
*/
public static Mask2D negate(final Mask2D mask) {
if (mask instanceof AlwaysTrue) {
return ALWAYS_FALSE;
} else if (mask instanceof AlwaysFalse) {
return ALWAYS_TRUE;
} else if (mask instanceof NegatedMask2D) {
return ((NegatedMask2D) mask).mask;
}
checkNotNull(mask);
return new NegatedMask2D(mask);
}
/**
* Return a 3-dimensional version of a 2D mask.
*
* @param mask the mask to make 3D
* @return a 3D mask
*/
public static Mask asMask(final Mask2D mask) {
return new AbstractMask() {
@Override
public boolean test(BlockVector3 vector) {
return mask.test(vector.toBlockVector2());
}
@Nullable
@Override
public Mask2D toMask2D() {
return mask;
}
@Override
public Mask copy() {
return Masks.asMask(mask.copy2D());
}
};
}
//FAWE start - protected > private
protected static class AlwaysTrue implements Mask, Mask2D {
//FAWE end
@Override
public boolean test(BlockVector3 vector) {
return true;
}
@Override
public boolean test(BlockVector2 vector) {
return true;
}
@Nullable
@Override
public Mask2D toMask2D() {
return this;
}
//FAWE start
@Override
public Mask tryCombine(Mask other) {
return other;
}
@Override
public Mask tryOr(Mask other) {
return this;
}
// No need to properly clone an always true mask
@Override
public Mask copy() {
return new AlwaysTrue();
}
// No need to properly clone an always true mask
@Override
public Mask2D copy2D() {
return new AlwaysTrue();
}
//FAWE end
}
//FAWE start - protected > private
protected static class AlwaysFalse implements Mask, Mask2D {
//FAWE end
@Override
public boolean test(BlockVector3 vector) {
return false;
}
@Override
public boolean test(BlockVector2 vector) {
return false;
}
@Nullable
@Override
public Mask2D toMask2D() {
return this;
}
//FAWE start
@Override
public Mask tryCombine(Mask other) {
return this;
}
@Override
public Mask tryOr(Mask other) {
return other;
}
// No need to properly clone an always false mask
@Override
public Mask copy() {
return new AlwaysFalse();
}
// No need to properly clone an always true mask
@Override
public Mask2D copy2D() {
return new AlwaysFalse();
}
//FAWE end
}
//FAWE start - protected > private
protected static class NegatedMask implements Mask {
//FAWE end
protected final Mask mask;
private NegatedMask(Mask mask) {
this.mask = mask;
}
@Override
public boolean test(BlockVector3 vector) {
return !mask.test(vector);
}
@Nullable
@Override
public Mask2D toMask2D() {
Mask2D mask2D = mask.toMask2D();
if (mask2D == null) {
return null;
}
return negate(mask2D);
}
//FAWE start
@Override
public Mask copy() {
return Masks.negate(mask.copy());
}
//FAWE end
}
private static class NegatedMask2D implements Mask2D {
private final Mask2D mask;
private NegatedMask2D(Mask2D mask) {
this.mask = mask;
}
@Override
public boolean test(BlockVector2 vector) {
return !mask.test(vector);
}
//FAWE start
@Override
public Mask2D copy2D() {
return Masks.negate(mask.copy2D());
}
//FAWE end
}
}