new Float: vPos[ 4 ];
GetVehiclePos( GetPlayerVehicleID( playerid ), vPos[ 0 ], vPos[ 1 ], vPos[ 2 ] );
GetVehicleZAngle( GetPlayerVehicleID( playerid ), vPos[ 3 ] );
vPos[ 0 ] += ( 2 * floatsin( -vPos[ 3 ], degrees ) );
vPos[ 1 ] += ( 2 * floatcos( -vPos[ 3 ], degrees ) );

Esetleg ?
 

stock ConvertNonNormaQuatToEuler(Float: qw, Float: qx, Float:qy, Float:qz,
                                &Float:heading, &Float:attitude, &Float:bank)
{
    new Float: sqw = qw*qw;
    new Float: sqx = qx*qx;
    new Float: sqy = qy*qy;
    new Float: sqz = qz*qz;
    new Float: unit = sqx + sqy + sqz + sqw; // if normalised is one, otherwise is correction factor
    //a*n~ëe` normalised, - îäe`í, â i\"?îo`e`âíîi` n~ëó÷a`a* - i\"îe^a`ça`o`a*ëü e^î??a*e^öe`e`
    new Float: test = qx*qy + qz*qw;
    if (test > 0.499*unit)
    { // singularity at north pole - în~îáa*ííîn~o`ü ía` n~a*âa*?íîi` i\"îë?n~a*
        heading = 2*atan2(qx,qw);
        attitude = 3.141592653/2;
        bank = 0;
        return 1;
    }
    if (test < -0.499*unit)
    { // singularity at south pole - în~îáa*ííîn~o`ü ía` ??íîi` i\"îë?n~a*
        heading = -2*atan2(qx,qw);
        attitude = -3.141592653/2;
        bank = 0;
        return 1;
    }
    heading = atan2(2*qy*qw - 2*qx*qz, sqx - sqy - sqz + sqw);
    attitude = asin(2*test/unit);
    bank = atan2(2*qx*qw - 2*qy*qz, -sqx + sqy - sqz + sqw);
    return 1;
}
stock GetVehicleRotation(vehicleid,&Float:heading, &Float:attitude, &Float:bank)
{
    new Float:quat_w,Float:quat_x,Float:quat_y,Float:quat_z;
    GetVehicleRotationQuat(vehicleid,quat_w,quat_x,quat_y,quat_z);
    ConvertNonNormaQuatToEuler(quat_w,quat_x,quat_z,quat_y, heading, attitude, bank);
    bank = -1*bank;
    return 1;
}
/// 
GetVehicleRotation(vID, X, Y, Z);

 

Ezt nézd meg.
 
[/quote]
Ezt meg nem értem elsõ ránézésre de azér tmég egykétszer átolvasom köszi