Generating continuous wave (sine/cos)

[mind_freak]

hi,
i have been working on the continuous generation in sine wave and trying to code the application , its like the continuous wave generated in oscilloscope. Its usually easy to generate one cycle of sine wave...but hard to generate it continuous .

I have tried a lot but i am exactly not getting the logic behind the continuous generation in sine wave

[Spitfire]

Just generate one cycle and keep appending it at the end of the waveform.
If parameters of the wave change, generate new cycle and keep appending that.
if you want the whole thing to move to the left, each time you append a points to the end, also pop point from the beggining.