Extended Light Sectors "setting"

[Sir_Crabs_A_Lot]

I have read the manual, and looked into Flyspray, and cannot seem to see anything on this:

When "hovering" near a nav light, an Extended Light Sector appears. This is good, but depending on the light the extended sector arc can appear anywhere from 1NM to 2.5NM out on charts at the same scale (according to the chart scale stated at the right hand side of the Status Bar).

Is there a "control" somewhere that lets you set this distance?

Ryan

[bcn]

In the object properties of the lights you will find the visibility range of the arcs.

The presented arc when hovering is scaled to 1/3 of the real range: 8nm results in 2.67nm on the canvas as in the example.

[skipperearly]

Have learned something new again - great!
I assume the 1/3 of real range has been taken just as it appears to be sensible - or is there a way to change this value in the ini file to e.g. 100%

[bcn]

Originally Posted by skipperearly

Have learned something new again

me too

[rgleason]

Is this worthy of mention in the manual?

If so, where please?

[cagney]

Originally Posted by rgleason

Is this worthy of mention in the manual?

If so, where please?

From the documentation:

https://opencpn.org/wiki/dokuwiki/doku.php?id=opencpnpencpn_user_manual:charts:vec tor_display_tab

Activating the Extended Light sectors clarifies the situation. All sectors are extended and leading white sectors are emphasized in yellow and extend the full nominal range of the light. Just hold the cursor over a light and the extended sectors are activated.

So this is, or was, the original intention, when the feature was introduced.
I still think that it's good to quickly see the nominal range.
Now I get different results from different charts. Cm93 and oeSENC are not showing the same. bcn findings confirms this. I'll look in to this.....later.

Thomas

[bcn]

Originally Posted by cagney

Now I get different results from different charts. Cm93 and oeSENC are not showing the same. bcn findings confirms this. I'll look in to this.....later.

Thomas

My example comes from plain S-57 getting the same presentation with 1/3 of real range for oeSENC and S-63.

Hubert

[cagney]

In the file "s52cnsy.cpp" in O:s source code the following quote is embedded as a comment.

Notes on light sectors:
// 1.) The radial leg-lines defining the light sectors are normally drawn to only 25mm
// from the light to avoid clutter (see Part C). However, the mariner should be able to
// select "full light-sector lines" and have the leg-lines extended to the nominal range
// of the light (VALMAR).

It seems that this is required by the S52 standard. So if O does not follow along, it may be a bug.

Thomas

[rgleason]

Yes, Vector Display Tab - Bouys Lights - Extended Light Sectors

Does have some information, but not the aspect that BCN notes
"The presented arc when hovering is scaled to 1/3 of the real range: 8nm results in 2.67nm on the canvas as in the example. "


or am I missing something in the manual?


Thomas, please do check it, but shouldn't we just add bcn's two images and a description about hovering?


PS: Thomas' note below appeared later.

[bcn]

Mmmh - the vectors (lines) are drawn as the range described - just the colored sectors are at 1/3.

[Hakan]

On my Win10 (Although master O 4.99.0 but I suppose this hasn't changed?)
The leading light sectors are correct presented for all my charts. CM93, S-57 and oeSENC??
oeSENC chart on the shot.

Håkan

[rgleason]

After using Opencpn 4.8.6 and turning on "Extended Light Sectors" with CM93 and GC01enc I had trouble seeing what difference it made. Hovering oveer the lights does nothing.


It appears to me that the hoover functionalty was added with v4.99.
At this point I have no idea what the check box "Extended Light Sectors" does in version 4.8.6, I certainly don't see extend light sectors with CM93 or CG01enc.

[petter5]

Works fine using 4.8.6 running Xubntu CM93

Originally Posted by rgleason

After using Opencpn 4.8.6 and turning on "Extended Light Sectors" with CM93 and GC01enc I had trouble seeing what difference it made. Hovering oveer the lights does nothing.


It appears to me that the hoover functionalty was added with v4.99.
At this point I have no idea what the check box "Extended Light Sectors" does in version 4.8.6, I certainly don't see extend light sectors with CM93 or CG01enc.

[rgleason]

Originally Posted by petter5

Works fine using 4.8.6 running Xubntu CM93

Tried it again. This time I tried it with Opengl off and toggled the Extended Light checkbox, and it works fine.
Then turned on Opengl and it still works.

Perhaps it was user error.

It appears to me that the hoover functionalty was added with v4.99.
At this point I have no idea what the check box "Extended Light Sectors" does in version 4.8.6, I certainly don't see extend light sectors with CM93 or CG01enc.

This is incorrect.


---
I still wonder about the changes to v4.99

[cagney]

I have now checked on 4.8.6, an as far as I can say it works as intended.
The point is that a leading sector extend all the way to it's nominal range, while other sectors are extended much less.
Don't worry about 4.99 ++, just yet, there isn't even a beta release.

Thomas