Initial Commit
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Sindusk
230
src/main/java/mod/sin/wyvern/AntiCheat.java
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230
src/main/java/mod/sin/wyvern/AntiCheat.java
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package mod.sin.wyvern;
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import java.nio.ByteBuffer;
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import java.util.Set;
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import java.util.logging.Logger;
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import org.gotti.wurmunlimited.modloader.ReflectionUtil;
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import org.gotti.wurmunlimited.modloader.classhooks.HookException;
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import org.gotti.wurmunlimited.modloader.classhooks.HookManager;
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import com.wurmonline.mesh.Tiles;
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import com.wurmonline.server.Constants;
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import com.wurmonline.server.Features;
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import com.wurmonline.server.Server;
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import com.wurmonline.server.creatures.Communicator;
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import com.wurmonline.server.creatures.Creature;
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import com.wurmonline.server.creatures.ai.NoPathException;
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import com.wurmonline.server.creatures.ai.Path;
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import com.wurmonline.server.creatures.ai.PathFinder;
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import com.wurmonline.server.creatures.ai.PathTile;
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import com.wurmonline.server.zones.Water;
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import com.wurmonline.server.zones.Zones;
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import javassist.CannotCompileException;
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import javassist.ClassPool;
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import javassist.CtClass;
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import javassist.NotFoundException;
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public class AntiCheat {
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private static Logger logger = Logger.getLogger(AntiCheat.class.getName());
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private static final int emptyRock = Tiles.encode((short)-100, (byte)Tiles.Tile.TILE_CAVE_WALL.id, (byte)0);
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private static boolean isCaveWall(int xx, int yy){
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if (xx < 0 || xx >= Zones.worldTileSizeX || yy < 0 || yy >= Zones.worldTileSizeY) {
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return true;
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} else if (Tiles.isSolidCave((byte)Tiles.decodeType((int)Server.caveMesh.data[xx | yy << Constants.meshSize]))) {
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return true;
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}
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return false;
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}
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private static boolean isSurroundedByCaveWalls(int tilex, int tiley){
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int xx = tilex+1;
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int yy = tiley;
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if(!isCaveWall(xx, yy)){
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return false;
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}
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xx = tilex-1;
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if(!isCaveWall(xx, yy)){
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return false;
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}
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xx = tilex;
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yy = tiley+1;
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if(!isCaveWall(xx, yy)){
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return false;
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}
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yy = tiley-1;
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if(!isCaveWall(xx, yy)){
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return false;
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}
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return true;
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}
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private static int getDummyWallAntiCheat(int tilex, int tiley){
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return Tiles.encode((short)Tiles.decodeHeight((int)Server.caveMesh.data[tilex | tiley << Constants.meshSize]), (byte)Tiles.Tile.TILE_CAVE_WALL.id, (byte)Tiles.decodeData((int)Server.caveMesh.data[tilex | tiley << Constants.meshSize]));
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}
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public static void sendCaveStripAntiCheat(Communicator comm, short xStart, short yStart, int width, int height){
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if (comm.player != null && comm.player.hasLink()) {
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try {
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ByteBuffer bb = comm.getConnection().getBuffer();
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bb.put((byte) 102);
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bb.put((byte) (Features.Feature.CAVEWATER.isEnabled() ? 1 : 0));
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bb.put((byte) (comm.player.isSendExtraBytes() ? 1 : 0));
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bb.putShort(xStart);
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bb.putShort(yStart);
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bb.putShort((short)width);
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bb.putShort((short)height);
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boolean onSurface = comm.player.isOnSurface();
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for (int x = 0; x < width; ++x) {
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for (int y = 0; y < height; ++y) {
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int xx = xStart + x;
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int yy = yStart + y;
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if (xx < 0 || xx >= Zones.worldTileSizeX || yy < 0 || yy >= Zones.worldTileSizeY) {
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bb.putInt(emptyRock);
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xx = 0;
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yy = 0;
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} else if (!onSurface) {
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if(!(Tiles.decodeType((int)Server.caveMesh.getTile(xx, yy)) == Tiles.Tile.TILE_CAVE_EXIT.id) && isSurroundedByCaveWalls(xx, yy)){
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bb.putInt(getDummyWallAntiCheat(xx, yy));
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}else{
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bb.putInt(Server.caveMesh.data[xx | yy << Constants.meshSize]);
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}
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} else if (Tiles.isSolidCave((byte)Tiles.decodeType((int)Server.caveMesh.data[xx | yy << Constants.meshSize]))) {
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bb.putInt(getDummyWallAntiCheat(xx, yy));
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} else {
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bb.putInt(Server.caveMesh.data[xx | yy << Constants.meshSize]);
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}
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if (Features.Feature.CAVEWATER.isEnabled()) {
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bb.putShort((short)Water.getCaveWater(xx, yy));
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}
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if (!comm.player.isSendExtraBytes()) continue;
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bb.put(Server.getClientCaveFlags(xx, yy));
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}
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}
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comm.getConnection().flush();
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}
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catch (Exception ex) {
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comm.player.setLink(false);
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}
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}
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}
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public static boolean isVisibleThroughTerrain(Creature performer, Creature defender){
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int trees = 0;
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//int treetilex = -1;
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//int treetiley = -1;
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//int tileArrowDownX = -1;
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//int tileArrowDownY = -1;
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PathFinder pf = new PathFinder(true);
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try {
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Path path = pf.rayCast(performer.getCurrentTile().tilex, performer.getCurrentTile().tiley, defender.getCurrentTile().tilex, defender.getCurrentTile().tiley, performer.isOnSurface(), ((int)Creature.getRange(performer, defender.getPosX(), defender.getPosY()) >> 2) + 5);
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float initialHeight = Math.max(-1.4f, performer.getPositionZ() + performer.getAltOffZ() + 1.4f);
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float targetHeight = Math.max(-1.4f, defender.getPositionZ() + defender.getAltOffZ() + 1.4f);
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double distx = Math.pow(performer.getCurrentTile().tilex - defender.getCurrentTile().tilex, 2.0);
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double disty = Math.pow(performer.getCurrentTile().tiley - defender.getCurrentTile().tiley, 2.0);
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double dist = Math.sqrt(distx + disty);
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double dx = (double)(targetHeight - initialHeight) / dist;
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while (!path.isEmpty()) {
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PathTile p = path.getFirst();
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if(Tiles.getTile((byte)Tiles.decodeType((int)p.getTile())).isTree()){
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trees++;
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}
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/*if (Tiles.getTile((byte)Tiles.decodeType((int)p.getTile())).isTree() && treetilex == -1 && Server.rand.nextInt(10) < ++trees) {
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treetilex = p.getTileX();
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treetiley = p.getTileY();
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}*/
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distx = Math.pow(p.getTileX() - defender.getCurrentTile().tilex, 2.0);
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disty = Math.pow(p.getTileY() - defender.getCurrentTile().tiley, 2.0);
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double currdist = Math.sqrt(distx + disty);
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float currHeight = Math.max(-1.4f, Zones.getLowestCorner(p.getTileX(), p.getTileY(), performer.getLayer()));
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double distmod = currdist * dx;
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if (dx < 0.0) {
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if ((double)currHeight > (double)targetHeight - distmod) {
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return false;
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}
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} else if ((double)currHeight > (double)targetHeight - distmod) {
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return false;
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}
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/*if (tileArrowDownX == -1 && Server.rand.nextInt(15) == 0) {
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tileArrowDownX = p.getTileX();
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tileArrowDownY = p.getTileY();
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}*/
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path.removeFirst();
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}
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if(trees >= 8){
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return false;
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}
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}
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catch (NoPathException np) {
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performer.getCommunicator().sendCombatNormalMessage("You fail to get a clear shot.");
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return false;
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}
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return true;
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}
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public static boolean isVisibleToAntiCheat(Creature cret, Creature watcher) {
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if (!cret.isVisible()) {
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return cret.getPower() > 0 && cret.getPower() <= watcher.getPower();
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}
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if (cret.isStealth()) {
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if (cret.getPower() > 0 && cret.getPower() <= watcher.getPower()) {
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return true;
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}
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if (cret.getPower() < watcher.getPower()) {
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return true;
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}
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if (watcher.isUnique() || watcher.isDetectInvis()) {
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return true;
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}
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Set<Long> stealthBreakers = null;
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try {
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stealthBreakers = ReflectionUtil.getPrivateField(cret, ReflectionUtil.getField(cret.getClass(), "stealthBreakers"));
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} catch (IllegalArgumentException | IllegalAccessException | ClassCastException | NoSuchFieldException e) {
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logger.info("Failed to get stealthBreakers for creature "+cret.getName());
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e.printStackTrace();
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}
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if (stealthBreakers != null && stealthBreakers.contains(watcher.getWurmId())) {
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return true;
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}
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return false;
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}
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if(WyvernMods.espCounter && watcher.isPlayer()){
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if(cret.isPlayer() || cret.getLeader() != null || cret.isRidden() || cret.isUnique()){
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if(cret.isWithinDistanceTo(watcher, 120)){
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return true;
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}
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if(isVisibleThroughTerrain(cret, watcher)){
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return true;
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}
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return false;
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}
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}
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return true;
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}
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public static void preInit(){
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try{
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ClassPool classPool = HookManager.getInstance().getClassPool();
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// - Change the caveStrip method to the custom one, so we can edit what the clients see! - //
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CtClass ctCommunicator = classPool.get("com.wurmonline.server.creatures.Communicator");
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ctCommunicator.getDeclaredMethod("sendCaveStrip").setBody("{"
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+ " mod.sin.wyvern.AntiCheat.sendCaveStripAntiCheat(this, $$);"
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+ "}");
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// - Change the creature isVisibleTo method to the custom one, so we can edit what the clients see! - //
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CtClass ctCreature = classPool.get("com.wurmonline.server.creatures.Creature");
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ctCreature.getDeclaredMethod("isVisibleTo").setBody("{"
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+ " return mod.sin.wyvern.AntiCheat.isVisibleToAntiCheat(this, $$);"
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+ "}");
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// - Edit VirtualZone creature movement so that it removes units that the player cannot see - //
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CtClass ctVirtualZone = classPool.get("com.wurmonline.server.zones.VirtualZone");
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ctVirtualZone.getDeclaredMethod("coversCreature").insertBefore(""
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+ "if(!this.covers($1.getTileX(), $1.getTileY())){"
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+ " return false;"
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+ "}"
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+ "if(!mod.sin.wyvern.AntiCheat.isVisibleToAntiCheat($1, this.watcher)){"
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+ " return false;"
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+ "}");
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} catch (CannotCompileException | NotFoundException | IllegalArgumentException | ClassCastException e) {
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throw new HookException((Throwable)e);
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}
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}
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}
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