/*******************************************************************************
* Copyright (c) 2015
*
* Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*******************************************************************************/
package jsettlers.algorithms.fogofwar;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.Serializable;
import java.util.concurrent.ConcurrentLinkedQueue;
import jsettlers.algorithms.fogofwar.CachedViewCircle.CachedViewCircleIterator;
import jsettlers.common.CommonConstants;
import jsettlers.common.player.IPlayerable;
import jsettlers.common.position.ShortPoint2D;
import jsettlers.logic.constants.Constants;
import jsettlers.logic.constants.MatchConstants;
/**
* This class holds the fog of war for a given map and player.
*
* @author Andreas Eberle
*/
public final class FogOfWar implements Serializable {
private static final long serialVersionUID = 1877994785778678510L;
/**
* Longest distance any unit may look
*/
static final byte MAX_VIEWDISTANCE = 65;
static final int PADDING = 10;
private final byte player;
final short width;
final short height;
byte[][] sight;
private transient boolean enabled = Constants.FOG_OF_WAR_DEFAULT_ENABLED;
private transient IFogOfWarGrid grid;
private transient boolean canceled;
public FogOfWar(short width, short height) {
this(width, height, (byte) 0);
}
public FogOfWar(short width, short height, byte player) {
this.width = width;
this.height = height;
this.player = player;
this.sight = new byte[width][height];
}
private void readObject(ObjectInputStream ois) throws ClassNotFoundException, IOException {
ois.defaultReadObject();
enabled = true;
}
public void start(IFogOfWarGrid grid) {
this.grid = grid;
NewFoWThread thread = new NewFoWThread();
thread.start();
}
/**
* Gets the visible status of a map pint
*
* @param x
* The x coordinate of the point in 0..(mapWidth - 1)
* @param y
* The y coordinate of the point in 0..(mapHeight - 1)
* @return The status from 0 to visible.
*/
public final byte getVisibleStatus(int x, int y) {
if (enabled) {
return (byte) Math.min(sight[x][y], CommonConstants.FOG_OF_WAR_VISIBLE);
} else {
return CommonConstants.FOG_OF_WAR_VISIBLE;
}
}
private final boolean isPlayerOK(IPlayerable playerable) {
return (MatchConstants.ENABLE_ALL_PLAYER_FOG_OF_WAR || (playerable.getPlayerId() == player));
}
public final void toggleEnabled() {
enabled = !enabled;
}
public void setEnabled(boolean enabled) {
this.enabled = enabled;
}
final class NewFoWThread extends Thread {
private static final byte DIM_DOWN_SPEED = 10;
private final CircleDrawer drawer;
private byte[][] buffer;
NewFoWThread() {
super("FoWThread");
super.setDaemon(true);
this.buffer = new byte[width][height];
drawer = new CircleDrawer();
}
@Override
public final void run() {
mySleep(500);
while (!canceled) {
// StopWatch watch = new MilliStopWatch();
// watch.restart();
if (enabled) {
rebuildSight();
}
// watch.stop("NewFoWThread needed: ");
mySleep(800);
}
}
private final void rebuildSight() {
drawer.setBuffer(buffer);
for (int x = 0; x < width; x++) {
for (int y = 0; y < height; y++) {
byte currSight = sight[x][y];
if (currSight >= CommonConstants.FOG_OF_WAR_EXPLORED) {
byte newSight = (byte) (currSight - DIM_DOWN_SPEED);
if (newSight < CommonConstants.FOG_OF_WAR_EXPLORED) {
buffer[x][y] = CommonConstants.FOG_OF_WAR_EXPLORED;
} else {
buffer[x][y] = newSight;
}
} else {
buffer[x][y] = sight[x][y];
}
}
}
ConcurrentLinkedQueue<? extends IViewDistancable> buildings = grid.getBuildingViewDistancables();
applyViewDistances(buildings);
ConcurrentLinkedQueue<? extends IViewDistancable> movables = grid.getMovableViewDistancables();
applyViewDistances(movables);
byte[][] temp = sight;
sight = buffer;
buffer = temp;
}
private final void applyViewDistances(ConcurrentLinkedQueue<? extends IViewDistancable> objects) {
for (IViewDistancable curr : objects) {
if (isPlayerOK(curr)) {
short distance = curr.getViewDistance();
if (distance > 0) {
ShortPoint2D pos = curr.getPos();
if (pos != null)
drawer.drawCircleToBuffer(pos.x, pos.y, distance);
}
}
}
}
private final void mySleep(int ms) {
try {
Thread.sleep(ms);
} catch (InterruptedException e) {
e.printStackTrace();
}
}
}
final class CircleDrawer {
private byte[][] buffer;
private final CachedViewCircle[] cachedCircles = new CachedViewCircle[MAX_VIEWDISTANCE];
public final void setBuffer(byte[][] buffer) {
this.buffer = buffer;
}
/**
* Draws a circle to the buffer line. Each point is only brightened and onlydrawn if its x coordinate is in [0, mapWidth - 1] and its computed
* y coordinate is bigger than 0.
*/
final void drawCircleToBuffer(int bufferX, int bufferY, int viewDistance) {
CachedViewCircle circle = getCachedCircle(viewDistance);
CachedViewCircleIterator iterator = circle.iterator(bufferX, bufferY);
while (iterator.hasNext()) {
final int x = iterator.getCurrX();
final int y = iterator.getCurrY();
if (x >= 0 && x < width && y > 0 && y < height) {
byte oldSight = buffer[x][y];
if (oldSight < CommonConstants.FOG_OF_WAR_VISIBLE) {
byte newSight = iterator.getCurrSight();
if (oldSight < newSight) {
buffer[x][y] = newSight;
}
}
}
}
}
private CachedViewCircle getCachedCircle(int viewDistance) {
int radius = Math.min(viewDistance + PADDING, MAX_VIEWDISTANCE - 1);
if (cachedCircles[radius] == null) {
cachedCircles[radius] = new CachedViewCircle(radius);
}
return cachedCircles[radius];
}
}
public void cancel() {
this.canceled = true;
}
}