D2BS

Goal : to add packet based NPC moving to D2bs

problem: coverting packet info like npc.gid -> packet(1) isnt a JS friendly task.

Solution: make a d2bs function and do the conversions in c++

Adding the Function

In JSGame.cpp

JSAPI_FUNC(my_moveNPC)
{    //   moveNPC(npc,x,y)
    if(!WaitForGameReady())
        THROW_WARNING(cx, "Game not ready");

    if(argc   < 2)
        THROW_ERROR(cx, "Not enough parameters were passed to moveNPC!");

    *rval = JSVAL_FALSE;

    myUnit* pNpc =   (myUnit*)JS_GetPrivate(cx, JSVAL_TO_OBJECT(argv[0]));
 

    if(!pNpc || pNpc->dwType !=1)
        THROW_ERROR(cx, "Invalid NPC passed to moveNPC!");


    DWORD dwX = JSVAL_TO_INT(argv[1]);
    DWORD dwY = JSVAL_TO_INT(argv[2]);

    if(!WaitForGameReady())
        THROW_WARNING(cx, "Game not ready");

//59   17   Make entity move      59 [DWORD entity kind] [DWORD entity   id] [WORD x] 00 00 [WORD y] 00 00
// from http://www.blizzhackers.cc/viewtopic.php?f=182&t=457480
// build packet  setting up the   Packet i learned from reading old d2bs shopping function rev 200 ish

    BYTE aPacket[17];
    aPacket[0] = 0x59;
    *(DWORD*)&aPacket[1] =  pNpc->dwType;  // npc  entity kind = 1
    *(DWORD*)&aPacket[5] =   pNpc->dwUnitId;
    *(DWORD*)&aPacket[9] =  dwX;
    *(DWORD*)&aPacket[13] = dwY;

    D2NET_SendPacket(sizeof(aPacket), 1, aPacket);
    *rval = JSVAL_TRUE;
    return JS_TRUE;
}

In JSGame.h

In JSGlobalFuncs.h to make it accessable to Scripts

This wasent exactly difficult finding the 3 places to edit was as simple as ctrl +f on any my_func, packet info is on EON, Filling in the packet info could be a bit tricky but I mostly copy pasted from the old shopping function that used packets. 

Results: