fix(cond): cabin temperature knobs center with scroll

[rare-potato]

Fixes #1763

Summary of Changes

Sets the scroll wheel increment for the A/C knob to a value that evenly divides the knobs into 0.2°C increments and allows for the knobs to align with every notch around the knobs. Users will be able to scroll or click from max value (300) to min value (0) and still be able to center the knobs on the notches.

References

I was not able to find any specific reference to the notch indications in the documentation I was able to acquire. So to maintain accuracy with the actual plane, I asked in discord what the relative position of the knob was in relation to the measured zone temperatures. An individual with the A320 Type Rated Pilot role in discord confirmed my theory that every notch is 2°C, starting at 18°C and ending at 30°C.

Additional context

Discord username (if different from GitHub): Rare Potato#9693

Testing instructions

Load aircraft, start APU if not running, and monitor the values listed for the Air Conditioning knobs while adjusting the knobs with both the mouse wheel and the left mouse button. The variables should decrease and increase by 5, allowing the knobs to become centered on the marked notches around each knob.

Verify that the knobs are centered on the notches when moved to the COLD, 9 o'clock, 11 o'clock, 12 o'clock, 1 o'clock, 3 o'clock, and HOT positions.

The values for local variables A32NX_OVHD_COND_CKPT_SELECTOR_KNOB, A32NX_OVHD_COND_FWD_SELECTOR_KNOB, and A32NX_OVHD_COND_AFT_SELECTOR_KNOB, starting at COLD and ending at the HOT setting, should return:

• 0    (18 C/COLD)
• 25   (19 C/halfway between first notch and COLD)
• 50   (20 C/first notch)
• 75   (21 C/halfway between first and second notch)
• 100  (22 C/second notch)
• 125  (23 C/halfway between second and center notch)
• 150  (24 C/center notch)
• 175  (25 C/halfway between center and third notch)
• 200  (26 C/third notch)
• 225  (27 C/halfway between third and fourth notch)
• 250  (28 C/forth notch)
• 275  (29 C/halfway between fourth notch and HOT)
• 300  (30 C/HOT)

Verify that the vent vectors on the COND page of the ECAM do not pass above of below the C and H markings and display the position of the knobs approximately.

Notes:

• the local variables for the current temperatures are A32NX_COND_CKPT_TEMP, A32NX_COND_FWD_TEMP and A32NX_COND_AFT_TEMP.
• allowing the temperatures to stabilize on the COND ECAM page should provide the most accurate results when adjusting the knobs.

How to download the PR for QA

Every new commit to this PR will cause a new A32NX artifact to be created, built, and uploaded.

1. Make sure you are signed in to GitHub
2. Click on the Checks tab on the PR
3. On the left side, click on the bottom PR tab
4. Click on the A32NX download link at the bottom of the page

[tracernz]

LGTM... cross-checked your temp vs. knob rotation values and they're accurate. 👍

[ShadowFrost3]

Quality Assurance Tester Report

Object of testing: #6921
Tier of Testing:1
Date: 17/03/2022

Testing Process: Cold and dark
Knob increments in .2 / 5 units - checked
temp correlation at ends and middle point - checked

Negatives: PAIN (slow..... but consistent with the rest of the aircraft)
Testing Results: Passed

Conclusions: Not subject to the bug I found on another knob so nice!

[mico975]

Quality Assurance Tester Report

Discord : mico#3145
Object of testing: #6921
Tier of Testing : 1
Date : 17/03/2022

Testing Process:
Verify that the knobs are centered on the notches when moved to the COLD, 9 o'clock, 11 o'clock, 12 o'clock, 1 o'clock, 3 o'clock, and HOT positions. - OK

Verify that the vent vectors on the COND page of the ECAM do not pass above of below the C and H markings and display the position of the knobs approximately. - OK

Negatives:
N/A

Testing Results:
Passed

Conclusions:
Feels good to me