Let the code speak..
PHP Code:
stock MovePointTowardsOtherPoint(const Float:A[3], const Float:B[3], const Float:X, Float:result[3])
{
MakeVectorFromPoints(A, B, result);
NormalizeVector(result, result);
ScaleVector(result, X);
AddVectors(A, result, result);
}
Edit: Oh, ^ what blodia said!