Put a spark plug on the coil, ground it, and crank. If you have good fire there, but none after the distributor, check the continuity of the coil wire. If it's ok be sure the timing is set close (ie the point open when the rotor is pointed at a terminal on the cap). Then replace the cap and rotor.
The coil produces the spark voltage; if it's good and makes a hot spark at the plug then the distribution system is at fault. All the cap and rotor do is send the coil's voltage to a plug. If the coil wire, rotor or cap is bad, or the rotor isn't pointed at a terminal on the cap, the voltage will not reach the plug.
If I was a betting man I'd say the rotor too. But I have seen caps where the center tower carbon contact was broken, hence good fire at the coil and none at the distributor outputs.