[PI][TUT]Clipped player following

[~Dylan~]

**CLIENT SIDED**

In Client.java add this method

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public int followPlayer = 0;

    public int followNPC = 0;

    public int followDistance = 1;
Now under "private void resetLogout() {" add
 

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followPlayer = 0;

        followNPC = 0;

        followDistance = 1;

Now add this void in Client.java

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public int canWalkDelay = 0;
     public int getDis(int coordX1, int coordY1, int coordX2, int coordY2)
    {
        int deltaX = coordX2 - coordX1;
        int deltaY = coordY2 - coordY1;
        return ((int)Math.sqrt(Math.pow(deltaX, 2) + Math.pow(deltaY, 2)));
    }
public int random(int range)
    {
        return (int)(Math.random() * range);
    }
   public boolean withinDistance(int x1, int y1, int x2, int y2, int dis)
    {
        for (int i = 0; i <= dis; i++)
        {
try{
            if ((x1 + i) == x2 && ((y1 + i) == y2 || (y1 - i) == y2 || y1 == y2))
                return true;
            else
            if ((x1 - i) == x2 && ((x1 + i) == y2 || (y1 - i) == y2 || y1 == y2))
                return true;
            else
            if (x1 == x2 && ((x1 + i) == y2 || (y1 - i) == y2 || y1 == y2))
                return true;
} catch(Exception ex){
System.out.println("Exception in following, method : WithingDistance");
}
        }
        return false;
    }
Add this under "private void mainGameProcessor() below if(!loggedIn) return;"

Code: [Select]

try{
canWalkDelay--;
        if (followNPC > 0)
        {
            NPC n = npcArray[followNPC];
            if (n != null)
            {
                if (!withinDistance(myPlayer.smallX[0], myPlayer.smallY[0], n.smallX[0], n.smallY[0], followDistance))
                {
                    doWalkTo(2, 0, 1, 0, myPlayer.smallY[0], 1, 0, n.smallY[0], myPlayer.smallX[0], false, n.smallX[0]);
                }
            }
        }
        else if (followPlayer > 0 && canWalkDelay <= 0)
        {
            Player p = playerArray[followPlayer];
            if (p != null)
            {
                int dis = getDis(myPlayer.smallX[0], myPlayer.smallY[0], p.smallX[0], p.smallY[0]);
                if (dis > followDistance)
                {
                    doWalkTo(2, 0, 1, 0, myPlayer.smallY[0], followDistance, 0, p.smallY[0], myPlayer.smallX[0], false, p.smallX[0]);
                    canWalkDelay = 30;
                }
                else if (dis == 0)
                {
                    int rnd = random(4);
                    if (rnd == 0)
                    {
                        doWalkTo(2, 0, 1, 0, myPlayer.smallY[0], 1, 0, p.smallY[0], myPlayer.smallX[0], false, p.smallX[0] - 2);
                    }
                    else if (rnd == 1)
                    {
                        doWalkTo(2, 0, 1, 0, myPlayer.smallY[0], 1, 0, p.smallY[0], myPlayer.smallX[0], false, p.smallX[0] + 2);
                    }
                    else if (rnd == 2)
                    {
                        doWalkTo(2, 0, 1, 0, myPlayer.smallY[0], 1, 0, p.smallY[0] - 2, myPlayer.smallX[0], false, p.smallX[0]);
                    }
                    else if (rnd == 3)
                    {
                        doWalkTo(2, 0, 1, 0, myPlayer.smallY[0], 1, 0, p.smallY[0] + 2, myPlayer.smallX[0], false, p.smallX[0]);
                    }
                    canWalkDelay = 60;
                }
            }
        }
} catch(Exception ex){
System.out.println("Exception in following, method : in process.)");
}
Now replace "case 174:" with this

Code: [Select]

case 174:

/*Empty Following Packet*/

                followPlayer = 0;

                followNPC = 0;

                int l11z = inStream.readUnsignedWord();

                int iq = inStream.readUnsignedByte();

                followDistance = inStream.readUnsignedWord();

                if (iq == 0)

                {

                    followNPC = l11z;

                }

                else if (iq == 1)

                {

                    followPlayer = l11z;

                }

                pktType = -1;

                return true;
**SERVER SIDED**

In Client.java add this

Code: [Select]

public void applyFollowing()
{
if (follow2 > 0)
{
//Client p = Server.playerHandler.client[followId];
Client p = (Client) Server.playerHandler.players[follow2];     
if (p != null)
{
if (isDead)
{
follow(0, 3, 1);
return;
}
if (!goodDistance(p.absX, p.absY, absX, absY, 25))
{
follow(0, 3, 1);
return;
}
}
else if (p == null)
{
follow(0, 3, 1);
}
}
else if (follow2 > 0)
{
//Server.npcHandler.npcs.NPC npc = Server.npcHandler.npcs[followId2];
if (Server.npcHandler.npcs[followId2] != null)
{
if (Server.npcHandler.npcs[followId2].isDead)
{
follow(0, 3, 1);
return;
}
if (!goodDistance(Server.npcHandler.npcs[followId2].absX, Server.npcHandler.npcs[followId2].absY, absX, absY, 25))
{
follow(0, 3, 1);
return;
}
}
else if (Server.npcHandler.npcs[followId2] == null)
{
follow(0, 3, 1);
}
}
}

public int followDistance = 0;

public void follow(int slot, int type, int distance)
{
if (slot > 0 && slot == follow2 && type == 1 && follow2 > 0 && followDistance != distance && (/*usingOtherRangeWeapons || */usingBow || usingMagic))
                    return;
else if (slot > 0 && slot == followId2 && type == 0 && followId2 > 0 && followDistance >= distance && distance != 1)
                    return;
//else if (type == 3 && followId2 == 0 && follow2 == 0)
                    //return;
outStream.createFrame(174);
if (freezeTimer > 0) {
outStream.writeWord(0);
} else {
outStream.writeWord(slot);
if (type == 0) {
follow2 = 0;
followId2 = slot;
faceUpdate(followId2);
} else if (type == 1) {
followId2 = 0;
follow2 = slot;
faceUpdate(32768 + follow2);
} else if (type == 3) {
followId2 = 0;
follow2 = 0;
followDistance = 0;
faceUpdate(65535);
}
followDistance = distance;
}
outStream.writeByte(type);
outStream.writeWord(distance);
}
Now search for

Code: [Select]

getPA().resetFollow();and delete it!

Now search for "process()" and add these two methods underneath it

Code: [Select]

applyFollowing();

if(followId > 0) {

getPA().followPlayer();

} else if (followId2 > 0) {

getPA().followNpc();

}Now open up Player.java and add this

Code: [Select]

public int follow2 = 0;

followId,

followDistance,

followId2,
Now replace your Followplayer.java with this

Code: [Select]

package server.model.players.packets;

import server.Server;
import server.model.players.Client;
import server.model.players.PacketType;

/**
 * Follow Player by Tyluur.
 **/
public class FollowPlayer implements PacketType {

@Override
public void processPacket(Client c, int packetType, int packetSize) {
/*int followPlayer = c.getInStream().readUnsignedWordBigEndian();
if(Server.playerHandler.players[followPlayer] == null) {
return;
}
c.playerIndex = 0;
c.npcIndex = 0;
c.mageFollow = false;
c.usingBow = false;
c.usingRangeWeapon = false;
c.followDistance = 1;
c.followId = followPlayer;*/
int toFollow = c.getInStream().readUnsignedWordBigEndian();
c.follow2 = toFollow;
if (Server.playerHandler.players[toFollow] == null)
return;
c.faceUpdate(32768+toFollow);
c.follow(toFollow, 1, 1);
}}and your Walking.java with this!

Code: [Select]

package server.model.players.packets;

import server.Server;
import server.model.players.Client;
import server.model.players.PacketType;

/**
 * Walking packet
 **/
public class Walking implements PacketType {

@Override
public void processPacket(Client c, int packetType, int packetSize) {
if (c.isBanking)
c.isBanking = false;

if (packetType == 248 || packetType == 164) {
c.faceUpdate(0);
c.npcIndex = 0;
c.playerIndex = 0;
if (c.followId > 0 || c.followId2 > 0 || c.follow2 > 0)
c.getPA().resetFollow();
}
c.getPA().removeAllWindows();
if(c.duelRule[1] && c.duelStatus == 5) {
if(Server.playerHandler.players[c.duelingWith] != null) {
if(!c.goodDistance(c.getX(), c.getY(), Server.playerHandler.players[c.duelingWith].getX(), Server.playerHandler.players[c.duelingWith].getY(), 1) || c.attackTimer == 0) {
c.sendMessage("Walking has been disabled in this duel!");
}
}
c.playerIndex = 0;
return;
}

if(c.freezeTimer > 0) {
if(Server.playerHandler.players[c.playerIndex] != null) {
if(c.goodDistance(c.getX(), c.getY(), Server.playerHandler.players[c.playerIndex].getX(), Server.playerHandler.players[c.playerIndex].getY(), 1) && packetType != 98) {
c.playerIndex = 0;
return;
}
}
if (packetType != 98) {
c.sendMessage("A magical force stops you from moving.");
c.playerIndex = 0;
}
return;
}

if (System.currentTimeMillis() - c.lastSpear < 4000) {
c.sendMessage("You have been stunned.");
c.playerIndex = 0;
return;
}

if (packetType == 98) {
c.mageAllowed = true;
}

if((c.duelStatus >= 1 && c.duelStatus <= 4) || c.duelStatus == 6) {
if(c.duelStatus == 6) {
c.getTradeAndDuel().claimStakedItems();
}
return;
}


if(c.respawnTimer > 3) {
return;
}
if(c.inTrade) {
return;
}
if(packetType == 248) {
packetSize -= 14;
}
c.newWalkCmdSteps = (packetSize - 5)/2;
if(++c.newWalkCmdSteps > c.walkingQueueSize) {
c.newWalkCmdSteps = 0;
return;
}

c.getNewWalkCmdX()[0] = c.getNewWalkCmdY()[0] = 0;

int firstStepX = c.getInStream().readSignedWordBigEndianA()-c.getMapRegionX()*8;
for(int i = 1; i < c.newWalkCmdSteps; i++) {
c.getNewWalkCmdX()[i] = c.getInStream().readSignedByte();
c.getNewWalkCmdY()[i] = c.getInStream().readSignedByte();
}

int firstStepY = c.getInStream().readSignedWordBigEndian()-c.getMapRegionY()*8;
c.setNewWalkCmdIsRunning(c.getInStream().readSignedByteC() == 1);
for(int i1 = 0; i1 < c.newWalkCmdSteps; i1++) {
c.getNewWalkCmdX()[i1] += firstStepX;
c.getNewWalkCmdY()[i1] += firstStepY;
}
}

}

[Sajon]

i seen this problem in alot of server

[Holy]

This isn't problem,more like solution mate :)
Anyways GJ Dylan  ;
-Holy

[Amoridan]

dont do so many } it just wastes memory and storage just do one per each saves a lot of time coding i would know.

[~Dylan~]

There is reasons I do { and }
It is simply because I use eclipse to check all my voids and methods to see if they are correct and will give me any errors and by using the "{" and "}" symbols I can make my tutorials quicker :)

[Povskill]

Thanx for that

[RawK]

Nice Tut, is this so people dont walk through walls etc.?