Get Nearest [LIB]

//***** Made by TopAz in 15 minutes.


//----- Header
#if defined _getnearest_included
    #endinput
#endif
#define _getnearest_included
#pragma library samp
//----------------

//----- External Library(ies)
#include <a_samp>
//------------------------

//----- Constants
/*#if defined USE_STREAMER
    #include "streamer"
#endif*/

#define OBJECT              (0)
#define PLAYER              (1)
#define VEHICLE             (2)
#define DYNAMIC_OBJECT      (3)

#define MAX_DISTANCE        (1000.0)
//----------------

//------ Variables

//Floats
new
    Float:px,
    Float:py,
    Float:pz,
    Float:ox,
    Float:oy,
    Float:oz,
    Float:distance = MAX_DISTANCE
;

//----------------

GetNearest(playerid, type);

stock GetNearest(playerid, type)
{
    new ret;
    switch(type)
    {
        case OBJECT:
        {
            ret = GetNearest_Object(playerid);
        }
        case PLAYER:
        {
            ret = GetNearest_Player(playerid);
        }
        case VEHICLE:
        {
            ret = GetNearest_Vehicle(playerid);
        }
        case DYNAMIC_OBJECT:
        {
            ret = GetNearest_DynObject(playerid);
        }
    }
    return ret;
}

stock GetNearest_Object(playerid)
{
    new currentobject = -1;
    GetPlayerPos(playerid, px, py, pz);
    for(new i = 0; i < MAX_OBJECTS; i++)
    {
        if(!IsValidObject(i)) continue;
        GetDynamicObjectPos(i, ox, oy, oz);
        new Float:odist = floatsqroot(
            floatpower(floatabs(floatsub(ox, px)), 2.0) +
            floatpower(floatabs(floatsub(oy, py)), 2.0) +
            floatpower(floatabs(floatsub(oz, pz)), 2.0)
        );
        if (currentobject == -1)
        {
            currentobject = i;
            distance = odist;
        }
        else if (odist < distance)
        {
            currentobject = i;
            distance = odist;
        }
    }
    return currentobject;
}

stock GetNearest_Player(playerid)
{
    new currentplayer = -1;
    GetPlayerPos(playerid, px, py, pz);
    for(new i = 0; i < MAX_PLAYERS; i++)
    {
        if(i == playerid) continue;
        GetPlayerPos(i, ox, oy, oz);
        new Float:odist = floatsqroot(
            floatpower(floatabs(floatsub(ox, px)), 2.0) +
            floatpower(floatabs(floatsub(oy, py)), 2.0) +
            floatpower(floatabs(floatsub(oz, pz)), 2.0)
        );
        if (currentplayer == -1)
        {
            currentplayer = i;
            distance = odist;
        }
        else if (odist < distance)
        {
            currentplayer = i;
            distance = odist;
        }
    }
    return currentplayer;
}

stock GetNearest_Vehicle(playerid)
{
    new currentvehicle = -1;
    GetPlayerPos(playerid, px, py, pz);
    for(new i = 0; i < MAX_VEHICLES; i++)
    {
        GetVehiclePos(i, ox, oy, oz);
        new Float:odist = floatsqroot(
            floatpower(floatabs(floatsub(ox, px)), 2.0) +
            floatpower(floatabs(floatsub(oy, py)), 2.0) +
            floatpower(floatabs(floatsub(oz, pz)), 2.0)
        );
        if (currentvehicle == -1)
        {
            currentvehicle = i;
            distance = odist;
        }
        else if (odist < distance)
        {
            currentvehicle = i;
            distance = odist;
        }
    }
    return currentvehicle;
}

stock GetNearest_DynObject(playerid)
{
    new currentdynobject = -1;
    GetPlayerPos(playerid, px, py, pz);
    for(new i = 0; i < CountDynamicObjects(); i++)
    {
        if(!IsValidDynamicObject(i)) continue;
        GetDynamicObjectPos(i, ox, oy, oz);
        new Float:odist = floatsqroot(
            floatpower(floatabs(floatsub(ox, px)), 2.0) +
            floatpower(floatabs(floatsub(oy, py)), 2.0) +
            floatpower(floatabs(floatsub(oz, pz)), 2.0)
        );
        if (currentdynobject == -1)
        {
            currentdynobject = i;
            distance = odist;
        }
        else if (odist < distance)
        {
            currentdynobject = i;
            distance = odist;
        }
    }
    return currentdynobject;
}