Development Updates

[elo]

hello developers,
can you fix this bug?
on the TDC, the impact angle has an offset by 180 degrees (Pics)

and it would be nice if the torpedotubes had to be flooded before the topedo shot and the outdoors opened manually

[Aktungbby]

elo!

[Usurpator]

Originally Posted by elo

hello developers,
can you fix this bug?
on the TDC, the impact angle has an offset by 180 degrees (Pics)

and it would be nice if the torpedotubes had to be flooded before the topedo shot and the outdoors opened manually

I believe you are wrong. The deflection angle(β), the impact angle(α), and the angle on the bow(γ) form a triangle. The sum of the angles of a triangle is always 180 degrees, thus we can calculate the angle of impact as: α=180°-(γ+β).



Source:
http://www.tvre.org/en/torpedo-calculator-t-vh-re-s3

[Usurpator]

This week we have been working on small improvements for the game. The next patch will include multiple stopwatches, customizable colors for the map and rebindable mouse buttons. We are also working on a simplified mission editor. This will work as a stop gap between the skirmish mode and the real mission editor, which will have more features.

[elo]

Originally Posted by Usurpator

I believe you are wrong. The deflection angle(β), the impact angle(α), and the angle on the bow(γ) form a triangle. The sum of the angles of a triangle is always 180 degrees, thus we can calculate the angle of impact as: α=180°-(γ+β).



Source:
http://www.tvre.org/en/torpedo-calculator-t-vh-re-s3

As far as I know an impact angle of 180° means that the torpedo would hit the ship in the back. Also a angle of bow of 0° would mean that the ship is heading right towards the viewpoint (the submarine) and therefore the torpedo would be unable to hit the ship in the back unless it would round the ship first.

[derstosstrupp]

Originally Posted by elo

As far as I know an impact angle of 180° means that the torpedo would hit the ship in the back. Also a angle of bow of 0° would mean that the ship is heading right towards the viewpoint (the submarine) and therefore the torpedo would be unable to hit the ship in the back unless it would round the ship first.

Intuitively yes, but that’s not how the computer displayed it. The Tvre worked within the framework of the torpedo triangle, not outside it. It did not have the functionality to take the complement if the impact angle. Why? Because the AOB was actually set indirectly by way of impact angle. In other words, the AOB crank was actually setting the impact angle, and the computer did the math and adjusted the AOB. The link the devs posted is very informative. Did you take the time to read it?

[Pisces]

The way other games show it to us, and by that teach it to us, may not be the way it actually have worked. The person responsible for the information on the tvre.org site apparently did his investigation work. And the devs modeled it after that.
Elo, would you care to explain where your knowledge comes from?

Judging by the edited photo (with red boxes) I would agree only looking at the dials. It is in disagreement with that formula. But the state that picture was taken in may not have been an operational state. As in being turned off and all needles pointing to a zero-state.

[derstosstrupp]

I might also add that model in that picture is of a TDC that predates the impact angle dial. That dial shows lead angle in that model, it wasn’t until later models the impact angle was added, after that picture. Note the picture does not have the red impact angle lamp on it, that’s an indication that that dial did not indicate impact angle. The deal was changed to impact angle at the same time the red indicator light was added. And that indicator light lit up when the impact angle was less than 30 or greater than 150°.

[derstosstrupp]

Alright here is the TDC in the U-505 tower. Impact angle is top right. Based on the dial settings, I’ve reconstructed the shot, also below.

Target bearing is about 112° (bottom dials, the outer pointer inside the red box is the bearing factored into the computer), AOB about 56° left. Parallax angle of 16°, gyro angle of about 92°.

The impact angle per the reconstruction, is about 110°, which matches the dial. NOT the 70° one would expect. Hopefully that suffices to show it.

[Pisces]

Originally Posted by derstosstrupp

I might also add that model in that picture is of a TDC that predates the impact angle dial. That dial shows lead angle in that model, it wasn’t until later models the impact angle was added, after that picture. ...

Well, that goes to show it pays to be a techno-history nerd. Solution: It means something else.