[REQ] info on periscope graticule

[emtguf]

Ive actually been working on this, and have a thread here about it somewhere.

I have the graticule scaled correctly for low power setting 1.5x but not so much at 6x.
I am assuming something in the cameras.cam file is wrong so Ive just been playing with it trying to get it right.

If you use the one included with SH5 to establish range you will however find it is incorrect.

[Arclight]

Originally Posted by Bilge_Rat

Hitman, do you have a link for your sh3 optics mod? I can't seem to find it.

http://www.subsim.com/radioroom/down...o=file&id=1519

Originally Posted by emtguf

Ive actually been working on this, and have a thread here about it somewhere.

I have the graticule scaled correctly for low power setting 1.5x but not so much at 6x.
I am assuming something in the cameras.cam file is wrong so Ive just been playing with it trying to get it right.

If you use the one included with SH5 to establish range you will however find it is incorrect.

Think it's a problem with then angular FOV, and maybe you'll need to tweak the viewport settings as well.

God I wish I'd payed more attention during math.

[Hitman]

I have the graticule scaled correctly for low power setting 1.5x but not so much at 6x.

The graticule was fixed for 1.5x zoom, it didn't change at all when switching to 6x.

1.5x was used in german (And US, and British) periscopes because that magnification gave the better feeling of the natural size of objects when looking with naked eye. That helped considerably estimating distance to them and keeping a good picture of the tactical situation. High power zoom in turn was used just for identifying details and gathering info about the target, never for estimating distance.

From the UBoat Commander's Handbook:

130.) For computing the range, the 1 magnification should be used in the periscope. With the 6-fold magnification, no estimation of distance is possible, on account of the monocular optical system of the periscope.
As a matter of principles the 6-fold magnification of the periscope should always only be used temporarily, in order the better to observe details of the enemy ship, as, for example, in computing its course and speed, but never for the actual attack at close range.

Interestingly, the US periscopes were actually set for using at 6x

The reason is that prewar doctrine considered it too difficult to approach an escroted target because of ASDIC, and submarines were thus expected to shoot from extreme ranges (In itself the reason why the fantastic american TDC was developed). In the US periscopes, like the picture shown above by Bilge_Rat, the big mark corresponds to 1 degree, the small ones to 1/4th of a degree at 6x magnification (Thus the divisions seen)

Arclight and Emtguf (or Hitman as I know you already made this for SH-III). I think we all three are looking for the same thing. A historically correct periscope mod for SH-5. Graticules, zoom, field of view etc.


ps. Hitman check PM please


I have a camera.dat file where i have the correct view in x1.5 and x6, but its based on the stock periscope image view-port. It took very little time to make that and you guys can have it if you want to have a look on it (or use it).

If you guys can provide me with a new view-port (bigger hole perhaps, and definitely historically correct graticule's like Hitman's SH-3 mod) then i can adjust the camera.dat file to suit that in a day or two. I guess what that takes is a modified "Page attack periscope.ini" and "Page obs periscope.ini" and a couple of DDS or tga files.

My dream is a periscope hole that only have a little black on the top and bottom of the screen (big hole) so the resolution of the image is as big as possible. The graticule on the alpha layer to be historically correct for obs and attack peri in both x1.5 and x6 (like your old SH-3 mod Hitman).

But I need someone to make the graphical layout and menu editions so the view-port is changed. I'm no eagle with menu editing.....

If you still can not find Hitman's SH-3 mod i have it saved here for a desperate attempt of doing the menu editing my self. But that would be in 2 years if no one have done it until then - that bad yea.....

[Arclight]

I already have a mod going as well that makes the changes to the zoom and elevation parameters (cameras.dat).

Also have an altered periscope mask ready with the graticules drawn on it. At the standard 1.5x zoom, the hardcoded ones aren't visible to begin with, problem is the markings are a direct copy.

Actually, don't know if it's bad, haven't tested yet. Maybe the original markings make sense once the base zoom is changed to 1.5x.



Here's the .dds, dont know if will be any good to anyone; http://www.filefront.com/15875575/Pe..._1024_SH5.dds/

[emtguf]

This is the one I have been working on.
It is very accurate with changes to the cameras.cam file at the 1.5x zoom level. If it doesnt need to be accurate at 6 then I guess it is done.

[Sailor Steve]

It looks good, and I like your 'multiplication' idea. It seems to work as it would have in real life.