RWR rework

[colingeniet]

• Add RWR sounds (uses volume knob on the RWR control panel, off by default)
• Working RWR lights for AJS (only displayed missile launches previously)

In the real RWR, the sound corresponds directly to the radar signal, with sound frequency equal to the PRF. I tried to mimic that in a very simplified way:

• A radar in scan mode gives a periodic sound
• A radar lock gives a continuous sound, with higher pitch
• There are also specific 2-tones sounds for missile launch (disabled on AJS) and missile radar lock (not used yet, should come with emissary based system)

The parameters (sound pitch, period for scan mode,...) depend on the aircraft type. Thus it should become possible to identify the radar type from the sound.

What is missing is some values for these parameters, particularly the PRF. The AJS values are from the manual (with a very liberal interpretation). I added a couple of test values for SAM and ships, and everything else is just a default value. Obviously it will be hard to find declassified information on radars, but I'm hoping to find some values for a couple of older aircrafts, and make up something for the rest.

[NikolaiVChr]

Cool, sound like nice improvements. :)

[colingeniet]

Additional changes:

• RWR only displays aircrafts in the 'known radars database' (no more piper cup on RWR)
• Radar limit angles can be adjusted on a per-aircraft basis. Removed the limit for AWACS and ground radars.

I managed to find some reasonable PRF values for the SAM and ships, based on older declassified radars. I still need to do the same for aircrafts.