[YouServ]

Hi, where can I find an anti no-recoil & anti no-spread ? I don't know how to block this cheat.

[Threshold]

Apparently, neither does anyone else.

https://sampforum.blast.hk/showthread.php?tid=596450

[cessil]

well there'll be weapon spread so if it's several hundred meters away with m4 landing every shot then mark them as suspicious, I quit my server before this became a problem so I don't have values for you to use.
also from what I've read they all seem to hit the players x y z, and since OnPlayerWeaponShot returns values relative to the players position you can see whereabouts they're hitting.
If they're both on level ground and one is cheating then he should be firing very close to 0 for the z value.


Personally I'd gather a lot of data
You can set up an object and stand back x meters and create objects every shot to see the spread for yourself, then if someone is using an m4 outside 25 meters (for example) and landing every shot then that's suspicious
actually I believe someone already done the spread test when OnPlayerWeaponShot first came out, but all I can find is this one
http://forum.sa-mp.com/showpost.php?...32&postcount=7

[ImMuslimNigga]

Код:

#define FILTERSCRIPT

#include <a_samp>

    new hitsInaRow[MAX_PLAYERS];
   	new Float:lastMiddle_X[MAX_PLAYERS];
	new Float:lastMiddle_Y[MAX_PLAYERS];
	new Float:lastMiddle_Z[MAX_PLAYERS];
    new Float:lastHit_X[MAX_PLAYERS];
    new Float:lastHit_Y[MAX_PLAYERS];
    new Float:lastHit_Z[MAX_PLAYERS];
    new weaponUsed[MAX_PLAYERS];
    new Float:averageSpread[MAX_PLAYERS];


    public OnFilterScriptInit()
    {
            print("\n--------------------------------------");
            print("No-spread detector by monday");
            print("--------------------------------------\n");
            return 1;
    }

	stock Float:GetPositiveNumber(Float:number)
	{
		if(0.0 > number)
		{
			number *= -1.0;
		}
		return number;
	}

     stock Float:GetDistanceBetweenPoints(Float:x1, Float:y1, Float:z1, Float:x2, Float:y2, Float:z2)
	{
    	return VectorSize(x1-x2, y1-y2, z1-z2);
	}

    
    public OnPlayerConnect(playerid)
    {
        hitsInaRow[playerid]=0;
        lastMiddle_X[playerid]=0.0;
		lastMiddle_Y[playerid]=0.0;
		lastMiddle_Z[playerid]=0.0;
	    lastHit_X[playerid]=0.0;
	    lastHit_Y[playerid]=0.0;
		lastHit_Z[playerid]=0.0;
		averageSpread[playerid]=0.0;
		weaponUsed[playerid] = 0;
        return 1;
    }
    
    forward SpreadCheckReset(playerid);
    public SpreadCheckReset(playerid)
    {
        hitsInaRow[playerid]=0;
        lastMiddle_X[playerid]=0.0;
		lastMiddle_Y[playerid]=0.0;
		lastMiddle_Z[playerid]=0.0;
	    lastHit_X[playerid]=0.0;
	    lastHit_Y[playerid]=0.0;
		lastHit_Z[playerid]=0.0;
		averageSpread[playerid]=0.0;
		weaponUsed[playerid] = 0;
  		return 1;
    }

    
    
    
    forward OnPlayerWeaponShot(playerid, weaponid, hittype, hitid, Float:fX, Float:fY, Float:fZ);
    public OnPlayerWeaponShot(playerid, weaponid, hittype, hitid, Float:fX, Float:fY, Float:fZ)
    {

            new
            Float:fOriginX, Float:fOriginY, Float:fOriginZ,
            Float:fVX, Float:fVY, Float:fVZ,
            Float:fHitPosX, Float:fHitPosY, Float:fHitPosZ,
            Float:middle_x, Float:middle_y, Float:middle_z,
            Float:compareMiddle_x, Float:compareMiddle_y, Float:compareMiddle_z,
            Float:compareHit_x, Float:compareHit_y, Float:compareHit_z,
            Float:compareBoth_x, Float:compareBoth_y, Float:compareBoth_z,
			Float:distance,
			Float:spreadValue,
			Float:spreadLimit,
			cheaterName[MAX_PLAYER_NAME],
			hitsNeeded,
			weaponTime,
			currentWeapon,
			finalMessage[128],
			gunName[32],
			spread[128];
			
			currentWeapon = GetPlayerWeapon(playerid);
			GetPlayerLastShotVectors(playerid, fOriginX, fOriginY, fOriginZ, fHitPosX, fHitPosY, fHitPosZ);
			distance = GetDistanceBetweenPoints(fOriginX, fOriginY, fOriginZ, fHitPosX, fHitPosY, fHitPosZ);
        	GetPlayerCameraFrontVector(playerid, fVX, fVY, fVZ);

        	middle_x = fOriginX + floatmul(fVX, distance);
        	middle_y = fOriginY + floatmul(fVY, distance);
        	middle_z = fOriginZ + floatmul(fVZ, distance);

            // middle_x, middle_y, middle_z = middle of the screen
        	// fHitPosX, fHitPosY, fHitPosZ = shooting point

        	//compare with the last shot
        	compareMiddle_x = GetPositiveNumber(middle_x - lastMiddle_X[playerid]);
        	compareMiddle_y = GetPositiveNumber(middle_y - lastMiddle_Y[playerid]);
        	compareMiddle_z = GetPositiveNumber(middle_z - lastMiddle_Z[playerid]);
        	compareHit_x = GetPositiveNumber(fHitPosX - lastHit_X[playerid]);
        	compareHit_y = GetPositiveNumber(fHitPosY - lastHit_Y[playerid]);
        	compareHit_z = GetPositiveNumber(fHitPosZ - lastHit_Z[playerid]);
			compareBoth_x = GetPositiveNumber(compareMiddle_x - compareHit_x);
        	compareBoth_y = GetPositiveNumber(compareMiddle_y - compareHit_y);
        	compareBoth_z = GetPositiveNumber(compareMiddle_z - compareHit_z);
			spreadValue = GetPositiveNumber(compareBoth_x + compareBoth_y + compareBoth_z);

        	//replace last shot data with new one
			lastMiddle_X[playerid] = middle_x;
			lastMiddle_Y[playerid] = middle_y;
			lastMiddle_Z[playerid] = middle_z;
			lastHit_X[playerid] = fHitPosX;
		    lastHit_Y[playerid] = fHitPosY;
		    lastHit_Z[playerid] = fHitPosZ;
		    
            if (weaponUsed[playerid] != currentWeapon)
			{
			    weaponUsed[playerid] = currentWeapon;
				SpreadCheckReset(playerid);
				return 1;
			}

			if (currentWeapon == 31 || currentWeapon == 30 ||currentWeapon == 28 || currentWeapon == 32 ||currentWeapon == 29) //m4, ak47, tec, uzi, mp5 - all of them are set to m4's limit which is the most accurate weapon. Mp5 has a bit faster shooting rate than other weapons included but its spread is also higher so it's not an issue, I tested it and it's not even close to get false detection
			{
			    hitsNeeded = 3; //
				weaponTime = 500; //time after which the stored hits will be reset(to make sure that there is no breaks between single shots)
				weaponUsed[playerid] = currentWeapon;
			}
			else
			{
			    if (currentWeapon == 24)//deagle
			    {
			    hitsNeeded = 2;
				weaponTime = 1600;
				weaponUsed[playerid] = currentWeapon;
				}
				else
				{
				return 1;
				}
			}
			
			if( GetPlayerSpecialAction(playerid) == SPECIAL_ACTION_DUCK )
			{
				spreadLimit = 0.00075 * distance; //decreased limit if the player is crouching
			}
			else
			{
			    spreadLimit = 0.00140 * distance;
			}
			
			format(spread, sizeof(spread), "Spread: %f Limit: %f",spreadValue, spreadLimit);
            //SendClientMessage(playerid, -1, spread);

			if(spreadValue < spreadLimit && 200.0 > distance > 3.0)
			{
            hitsInaRow[playerid]++;
            averageSpread[playerid] = averageSpread[playerid] + spreadValue;
            }
            
            if (hitsInaRow[playerid] == 1)
            {
            	SetTimerEx("SpreadCheckReset", weaponTime, 0, "i", playerid);
			}
			
			if (hitsInaRow[playerid] == hitsNeeded || hitsInaRow[playerid] > hitsNeeded)
			{
			//send message to admins, kick, ban
			GetWeaponName(currentWeapon, gunName, sizeof(gunName));
			GetPlayerName(playerid, cheaterName, MAX_PLAYER_NAME);
			averageSpread[playerid] /= float(hitsInaRow[playerid]);
			format(finalMessage, sizeof(finalMessage), "%s is shooting under spread limit using %s. Average spread=%f Limit=%f", cheaterName, gunName, averageSpread[playerid], spreadLimit);
            SendClientMessageToAll(0xED6755AA,finalMessage);
            SpreadCheckReset(playerid);
            }
            return 1;
    }

[YouServ]

Don't work

[cessil]

of course not, it's comparing the players camera direction to the angle of the shot, there's no guarantee that they'll be synced perfectly at the same time

[Trucido]

until sa-mp ups its anticheat i dont really think there will be a fix for it. all theyre doing is NOPing 3 bytes