Random explosion generator

/* Known Issue: two points can't be too close. (At least 5 unit apart, or else why do you even use this lol?)*/

#define FILTERSCRIPT

#include <a_samp>

#define cYellow 0xFFFF00AA
#define cWhite 0xFFFFFFAA

new explosionTimer = -1;
enum pPos
{
    Float: pX,
    Float: pY,
    Float: pZ
}
new planePos[2][pPos];
new explosionSize;

public OnFilterScriptInit()
{
    print("\n--------------------------------------");
    print(" Random explosion generator by Nordic");
    print("--------------------------------------\n");
    return 1;
}

public OnFilterScriptExit()
{
    KillTimer(explosionTimer);
    return 1;
}

public OnPlayerCommandText(playerid, cmdtext[])
{
    new cmd[128], index, string[128];
    cmd = strtok(cmdtext, index);
    if (strcmp("/setpos", cmd, true) == 0)
    {
        new tmp[128];
        tmp = strtok(cmdtext, index);
        if(!strlen(tmp)) return SendClientMessage(playerid, cYellow, "/setpos [pos number] 1 or 2");
        new pos = strval(tmp);
        new Float: x, Float: y, Float: z;
        GetPlayerPos(playerid, x, y, z);
        if(pos == 1)
        {
            planePos[0][pX] = x;
            planePos[0][pY] = y;
            planePos[0][pZ] = z;
            format(string, sizeof(string), "Point 1 has been set to X: %f Y: %f", planePos[0][pX], planePos[0][pY]);
        }
        else
        {
            planePos[1][pX] = x;
            planePos[1][pY] = y;
            planePos[1][pZ] = z;
            format(string, sizeof(string), "Point 2 has been set to X: %f Y: %f", planePos[1][pX], planePos[1][pY]);
        }
        SendClientMessage(playerid, cWhite, string);
        evaluateHeight(playerid);
        explosionSize = evaluateSize();
        if(explosionSize == 7) SendClientMessage(playerid, cYellow, "Area might be too big!");
        return 1;
    }
    if(strcmp("/explode", cmd, true) == 0)
    {
        if(explosionTimer == -1)
        {
            new tmp[128], interval;
            tmp = strtok(cmdtext, index);
            if(!strlen(tmp)) return SendClientMessage(playerid, cYellow, "/explode [interval] (Millisecond)");
            interval = strval(tmp);
            new Float: passZ;
            passZ = floatabs(floatdiv( (planePos[0][pZ] + planePos[1][pZ]) , 2.0));
            explosionTimer = SetTimerEx("generateExplosion", interval, true, "f", passZ);
        }
        else
        {
            KillTimer(explosionTimer);
            explosionTimer = -1;
            SendClientMessage(playerid, cYellow, "Explosions stopped.");
        }
        return 1;
    }
    return 0;
}

forward generateExplosion(Float: valZ);
public generateExplosion(Float: valZ)
{
    new Float: genX, Float: genY, string[128], negDebug;

    negDebug = floatround(   floatsub(planePos[1][pX], planePos[0][pX]), floatround_round);
    if(negDebug < 0)
    {
        new newRand;
        negDebug = negDebug * -1;
        newRand = random(negDebug);
        newRand = newRand * -1;
        genX = float( newRand + floatround(planePos[0][pX], floatround_round));
    }
    else genX = float( random(negDebug) + floatround(planePos[0][pX], floatround_round));

    negDebug = floatround(   floatsub(planePos[1][pY], planePos[0][pY]), floatround_round);
    if(negDebug < 0)
    {
        new newRand;
        negDebug = negDebug * -1;
        newRand = random(negDebug);
        newRand = newRand * -1;
        genY = float( newRand + floatround(planePos[0][pY], floatround_round));
    }
    else genY = float( random(negDebug) + floatround(planePos[0][pY], floatround_round));

    CreateExplosion(genX, genY, valZ, 10, 1.0);
    format(string, sizeof(string), "X : %f Y: %f Z: %f", genX, genY, valZ);
    SendClientMessageToAll(cWhite, string);
}
evaluateSize()
{
    new Float: distance;
    distance = floatsqroot(floatpower( (planePos[1][pX] - planePos[0][pX]) , 2.0) + floatpower( (planePos[1][pY] - planePos[0][pY]) , 2.0 ));
    if(distance < 50.0) return 11;
    else if(distance < 100.0) return 10;
    else if(distance < 150.0) return 6;
    else return 7;
}
evaluateHeight(playerid)
{
    new Float: diff, string[128];
    diff = planePos[0][pZ] - planePos[1][pZ];
    if(floatabs(diff) > 20)
    {
        format(string, sizeof(string), "To get the best effect, the difference in height should be 0, current diffrence: %f", floatabs(diff));
        SendClientMessage(playerid, cYellow, string);
    }
}

// credit to DracoBlue
strtok(const string[], &index)
{
    new length = strlen(string);
    while ((index < length) && (string[index] <= ' '))
    {
        index++;
    }

    new offset = index;
    new result[20];
    while ((index < length) && (string[index] > ' ') && ((index - offset) < (sizeof(result) - 1)))
    {
        result[index - offset] = string[index];
        index++;
    }
    result[index - offset] = EOS;
    return result;
}