[Simon]

A vector is not a position which is what CreateObject expects. You have to use a combination of GetPlayerCameraPos and GetPlayerCameraFrontVector.

For example you could do something like this to create an object in the direction of where a player is looking.

pawn Код:

new
    Float:fPX, Float:fPY, Float:fPZ,
    Float:fVX, Float:fVY, Float:fVZ,
    Float:object_x, Float:object_y, Float:object_z;

// Change this constant to the the scale you want. A larger scale increases the distance from
// the camera. A negative scale will inverse the vectors and make them face in the opposite
// direction (i.e. behind the camera)
const
    Float:fScale = 6.0; 

GetPlayerCameraPos(playerid, fPX, fPY, fPZ);
GetPlayerCameraFrontVector(playerid, fVX, fVY, fVZ);

object_x = fPX + floatmul(fVX, fScale);
object_y = fPY + floatmul(fVY, fScale);
object_z = fPZ + floatmul(fVZ, fScale);

CreateObject(345, object_x, object_y, object_z, 0.0, 0.0, 0.0);

You'll have to read about vector algebra if you wish to do more.