  We present a new solution of the direct problem of planet transits based on
transformation of double integrals to single ones. On the basis of our direct
problem solution we created the code TAC-maker for rapid and interactive
calculation of synthetic planet transits by numerical computations of the
integrals. The validation of our approach was made by comparison with the
results of the wide-spread Mandel & Agol (2002) method for the cases of linear,
quadratic and squared root limb-darkening laws and various combinations of
model parameters. For the first time our approach allows the use of arbitrary
limb-darkening law of the host star. This advantage together with the
practically arbitrary precision of the calculations make the code a valuable
tool that faces the challenges of the continuously increasing photometric
precision of the ground-based and space observations.
