Plex-FAWE/src/main/java/com/sk89q/worldedit/regions/EllipsoidRegion.java

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// $Id$
/*
* WorldEdit
* Copyright (C) 2010 sk89q <http://www.sk89q.com> 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;
import com.sk89q.worldedit.BlockVector;
import com.sk89q.worldedit.BlockVector2D;
import com.sk89q.worldedit.LocalWorld;
import com.sk89q.worldedit.Vector;
import com.sk89q.worldedit.Vector2D;
import com.sk89q.worldedit.world.storage.ChunkStore;
import java.util.Set;
import java.util.HashSet;
/**
*
* @author TomyLobo
*/
public class EllipsoidRegion extends AbstractRegion {
/**
* Stores the center.
*/
private Vector center;
/**
* Stores the radiuses plus 0.5 on each axis.
*/
private Vector radius;
/**
* Construct a new instance of this ellipsoid region.
*
* @param pos1
* @param pos2
*/
public EllipsoidRegion(Vector pos1, Vector pos2) {
this(null, pos1, pos2);
}
/**
* Construct a new instance of this ellipsoid region.
*
* @param world
* @param center
* @param radius
*/
public EllipsoidRegion(LocalWorld world, Vector center, Vector radius) {
super(world);
this.center = center;
setRadius(radius);
}
public EllipsoidRegion(EllipsoidRegion ellipsoidRegion) {
this(ellipsoidRegion.world, ellipsoidRegion.center, ellipsoidRegion.getRadius());
}
/**
* Get the lower point of the ellipsoid.
*
* @return min point
*/
public Vector getMinimumPoint() {
return center.subtract(getRadius());
}
/**
* Get the upper point of the ellipsoid.
*
* @return max point
*/
public Vector getMaximumPoint() {
return center.add(getRadius());
}
/**
* Get the number of blocks in the region.
*
* @return number of blocks
*/
public int getArea() {
return (int) Math.floor((4.0 / 3.0) * Math.PI * radius.getX() * radius.getY() * radius.getZ());
}
/**
* Get X-size.
*
* @return width
*/
public int getWidth() {
return (int) (2 * radius.getX());
}
/**
* Get Y-size.
*
* @return height
*/
public int getHeight() {
return (int) (2 * radius.getY());
}
/**
* Get Z-size.
*
* @return length
*/
public int getLength() {
return (int) (2 * radius.getZ());
}
private Vector calculateDiff(Vector... changes) throws RegionOperationException {
Vector diff = new Vector().add(changes);
if ((diff.getBlockX() & 1) + (diff.getBlockY() & 1) + (diff.getBlockZ() & 1) != 0) {
throw new RegionOperationException(
"Ellipsoid changes must be even for each dimensions.");
}
return diff.divide(2).floor();
}
private Vector calculateChanges(Vector... changes) {
Vector total = new Vector();
for (Vector change : changes) {
total = total.add(change.positive());
}
return total.divide(2).floor();
}
/**
* Expand the region.
*
* @param changes array/arguments with multiple related changes
* @throws RegionOperationException
*/
public void expand(Vector... changes) throws RegionOperationException {
center = center.add(calculateDiff(changes));
radius = radius.add(calculateChanges(changes));
}
/**
* Contract the region.
*
* @param changes array/arguments with multiple related changes
* @throws RegionOperationException
*/
public void contract(Vector... changes) throws RegionOperationException {
center = center.subtract(calculateDiff(changes));
Vector newRadius = radius.subtract(calculateChanges(changes));
radius = Vector.getMaximum(new Vector(1.5, 1.5, 1.5), newRadius);
}
@Override
public void shift(Vector change) throws RegionOperationException {
center = center.add(change);
}
/**
* Get the center.
*
* @return center
*/
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@Override
public Vector getCenter() {
return center;
}
/**
* Set the center.
*
* @param center
*/
public void setCenter(Vector center) {
this.center = center;
}
/**
* Get the radiuses.
*
* @return radiuses
*/
public Vector getRadius() {
return radius.subtract(0.5, 0.5, 0.5);
}
/**
* Set radiuses.
*
* @param radius
*/
public void setRadius(Vector radius) {
this.radius = radius.add(0.5, 0.5, 0.5);
}
/**
* Get a list of chunks that this region is within.
*
* @return
*/
public Set<Vector2D> getChunks() {
final Set<Vector2D> chunks = new HashSet<Vector2D>();
final Vector min = getMinimumPoint();
final Vector max = getMaximumPoint();
final int centerY = getCenter().getBlockY();
for (int x = min.getBlockX(); x <= max.getBlockX(); ++x) {
for (int z = min.getBlockZ(); z <= max.getBlockZ(); ++z) {
if (!contains(new BlockVector(x, centerY, z))) {
continue;
}
chunks.add(new BlockVector2D(
x >> ChunkStore.CHUNK_SHIFTS,
z >> ChunkStore.CHUNK_SHIFTS
));
}
}
return chunks;
}
/**
* Returns true based on whether the region contains the point,
*
* @param pt
*/
public boolean contains(Vector pt) {
return pt.subtract(center).divide(radius).lengthSq() <= 1;
}
/**
* Returns string representation in the format
* "(centerX, centerY, centerZ) - (radiusX, radiusY, radiusZ)".
*
* @return string
*/
@Override
public String toString() {
return center + " - " + getRadius();
}
public void extendRadius(Vector minRadius) {
setRadius(Vector.getMaximum(minRadius, getRadius()));
}
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public EllipsoidRegion clone() {
return (EllipsoidRegion) super.clone();
}
}