Just messing around, trying to get some simple Amplitude Modulation to work. I really hate this code because of the hard-coded values. I just don't have a firm enough grasp on the math to create more elegant code at the moment.
Next up, after I get a good grasp of AM, I will work on FM.
Results (Pure Wave vs Amplitude Modulated Wave):
Sine Wave:
Square Wave:
Sawtooth Wave:
Triangle Wave:
Semi-circle (My bessel-J function vs a real bessel-J):
My naive bessel-J implementation (just straight computing the summation) is only good between x=0 and around x=8 before it diverges significantly. To get a basic approximation of a proper semicircle we need to be able to handle at least x=PI*20
Keyboard shortcuts:
Carrier Wave Shortcuts:
Up arrow - Increase carrier wave frequency
Down arrow - Decrease carrier wave frequency
Left arrow - Shift phase of wave left by 10 degrees
Right arrow - Shift phase of wave right by 10 degrees
Input Signal Wave Shortcuts:
1 - Sine Wave
2 - Square Wave
3 - Sawtooth Wave
4 - Triangle Wave
5 - Semi-circle (With my own BesselJ function)
6 - Semi-circle (With a real BesselJ function)
Numpad 8 - Increase input signal wave frequency
Numpad 2 - Decrease input signal wave frequency
Numpad 4 - Shift phase of input signal wave left 1 degree
Numpad 6 - Shift phase of input signal wave right 1 degree
Numpad Plus - Increase input signal wave amplitude by 1 percent.
Numpad Minus - Decrease input signal wave amplitude by 1 percent.
Other Shortcuts:
M - Enable/Disable amplitude modulation.
[ - Decrease modulation depth
] - Increase modulation depth
Minus - Decrease the number of iterations run for fourier-series based signals.
Plus - Increase the number of iterations run for fourier-series based signals.