[TEC] Range finding using the horizon?

tater · 06-22-07, 10:06 AM

Doesn't work.

I checked it last night. It's cool that ships are sunk below the horizon, but I tested last night vs this on a lark:

Using the profile of Kongo in ONI 41-42 I. No dice. I set up a mission at ~10 nm range, 90 degree AOB. Interestingly, my first guess (assuming a height above sea level on a Porpoise of 30 feet (looking at crew vs waterline)) showed around 20,000 yards!

Looked good.

I got closer, and the map contacts showed Kongo at ~5.3nm. The horizon cut Kongo about the same though.

Too bad, it'd make no contact reports so much cooler if you could get the range.

I guess it might be possible to make a similar table for SH4's world geometry...

nomad_delta · 06-22-07, 11:25 AM

This is exactly what I was looking for in my other thread about not being able to measure distances to far-away targets using the stadimeter. Too bad it's not modeled properly to work in the game.

You say the horizon 'cut' the Kongo at about the same point even when you got closer to it? That would seem to indicate that they're just kinda 'faking' the horizon curve rather than modeling it... which would mean that we wouldn't be able to create our own table based on SH4 world geometry.

nomad_delta

tater · 06-22-07, 11:33 AM

It's odd. At long ranges, the ships certainly sink the horizon. Once it's in "real" visual range, perhaps the horizon is abandoned some how...

My hope is that it might work when we see masts over the horizon.

Hitman · 06-22-07, 03:06 PM

Hang on, this has a possible solution....messing with earth radius value in the scene.dat file changes the curvature of the earth and as such the level of ship over the horizon....it's a matter of trial and error until getting it right. Though I'm not willing to give it a go until 1.3 is here and we see the definitive form of SH4 :hmm:

tater · 06-22-07, 03:12 PM

Cool, I have all the ONI manuals, too. As they are public domain documents, they can be converted to whatever we like.

I had this wierd idea that you could make a new recognition manual entry (like a country) where eacy "ship" is just a number, and the number is a height. Look at a manual, decide what landmark you like, select the height you guess it is, use the stadimeter...

06-22-07, 10:06 AM	#1
tater Navy Seal Join Date: Mar 2007 Location: New Mexico, USA Posts: 9,023 Downloads: 8 Uploads: 2	[TEC] Range finding using the horizon? Doesn't work. I checked it last night. It's cool that ships are sunk below the horizon, but I tested last night vs this on a lark: Using the profile of Kongo in ONI 41-42 I. No dice. I set up a mission at ~10 nm range, 90 degree AOB. Interestingly, my first guess (assuming a height above sea level on a Porpoise of 30 feet (looking at crew vs waterline)) showed around 20,000 yards! Looked good. I got closer, and the map contacts showed Kongo at ~5.3nm. The horizon cut Kongo about the same though. Too bad, it'd make no contact reports so much cooler if you could get the range. I guess it might be possible to make a similar table for SH4's world geometry...

06-22-07, 03:06 PM	#4
Hitman Pacific Aces Dev Team Join Date: Sep 2002 Location: Spain Posts: 6,109 Downloads: 109 Uploads: 2	Hang on, this has a possible solution....messing with earth radius value in the scene.dat file changes the curvature of the earth and as such the level of ship over the horizon....it's a matter of trial and error until getting it right. Though I'm not willing to give it a go until 1.3 is here and we see the definitive form of SH4 :hmm: __________________ One day I will return to sea ...

06-22-07, 11:25 AM	#2
nomad_delta Planesman Join Date: May 2007 Location: San Francisco, California Posts: 185 Downloads: 1 Uploads: 0	This is exactly what I was looking for in my other thread about not being able to measure distances to far-away targets using the stadimeter. Too bad it's not modeled properly to work in the game. You say the horizon 'cut' the Kongo at about the same point even when you got closer to it? That would seem to indicate that they're just kinda 'faking' the horizon curve rather than modeling it... which would mean that we wouldn't be able to create our own table based on SH4 world geometry. nomad_delta

06-22-07, 11:33 AM	#3
tater Navy Seal Join Date: Mar 2007 Location: New Mexico, USA Posts: 9,023 Downloads: 8 Uploads: 2	It's odd. At long ranges, the ships certainly sink the horizon. Once it's in "real" visual range, perhaps the horizon is abandoned some how... My hope is that it might work when we see masts over the horizon.

06-22-07, 03:12 PM	#5
tater Navy Seal Join Date: Mar 2007 Location: New Mexico, USA Posts: 9,023 Downloads: 8 Uploads: 2	Cool, I have all the ONI manuals, too. As they are public domain documents, they can be converted to whatever we like. I had this wierd idea that you could make a new recognition manual entry (like a country) where eacy "ship" is just a number, and the number is a height. Look at a manual, decide what landmark you like, select the height you guess it is, use the stadimeter...