OpenCPN Version 2.1.0 Beta

[dougwm10]

Hi

Does anyone have a download location for the windows version of RC615a yet ??? any info would be much appreciated


Doug

[kiwiradical]

Originally Posted by idpnd

The text display has been replaced by the info box upon mouseover as you describe. This is all part of chart quilting mode:

- Chart previews are shown upon mouseover on the tab below when quilting is off only

- When quilting is on you should always be shown the best charts for your viewport anyhow, so there isn't much point in previewing them.

- Instead, the chart is highlighted in pink on the viewport in quilting mode



There is a pop-up window displaying that data in route mode.

This is quite a common request, and the free software implementation gippy by dev team member manimaul may well become a modular/integral part of opencpn at some stage (currently linux only).

Otherwise, I suggest you use the polarcom dials (on windows, instead of navmonpc) as you could make them small, semi-transparent and 'always on top' to achieve the desired effect.

Thanks! All very helpful!! Polarcom does exactly what I want.

[sinbad7]

Using the 'Force full database rebuild' function in CHARTS,upon completion the screen goes blanc and openCPN freezes up and needs re-booting.
This happens EVERY time I use it.

Tore

[SethDart]

Hi,

IMHO there's a potential problem in CPA/TCPA computing.
First (fc * fc) + (fs * fs) can be zero (when COG & SOG are the same for both ship) that would lead to a division by zero.
And when TCPA is negative, that doesn't mean it's invalid, only that the other ship is going far from us ; that means TCPA is now (by definition)
If I understand correctly, the current code set bCPA_valid to false once the other ship crossed our route (thus disabling any alarm), even if it's still in the "CPA Alarm range"

Hope I'm clear enough (and not wrong in my analysis )

One more thing, CPA/TCPA should not be computed if "No CPA Calculation if target range is greater than g_CPAMax_NM Nm" is checked

Index: src/ais.cpp
===================================================================
RCS file: /cvsroot/opencpn/opencpn/src/ais.cpp,v
retrieving revision 1.44
diff -u -r1.44 ais.cpp
--- src/ais.cpp    16 Jun 2010 03:51:29 -0000    1.44
+++ src/ais.cpp    17 Jun 2010 12:02:15 -0000
@@ -1686,6 +1693,21 @@
       if(!ptarget->b_positionValid)
             return;
 
+      //    Compute the current Range/Brg to the target
+      double brg, dist;
+      DistanceBearingMercator(ptarget->Lat, ptarget->Lon, gLat, gLon, &brg, &dist);
+      ptarget->Range_NM = dist;
+      ptarget->Brg = brg;
+      // No CPA Calculation if target range is greater than g_CPAMax_NM Nm
+      if(g_bCPAMax)
+      {
+            if( ptarget->Range_NM > g_CPAMax_NM)
+            {
+                  ptarget->bCPA_Valid = false;
+                  return;
+            }
+      }
+
             //    Express the SOGs as meters per hour
       double v0 = gSog         * 1852.;
       double v1 = ptarget->SOG * 1852.;
@@ -1720,9 +1730,19 @@
             //    These will be useful
             double fc = (v0 * cosa) - (v1 * cosb);
             double fs = (v0 * sina) - (v1 * sinb);
+            double d = (fc * fc) + (fs * fs);
+            double tcpa;
 
+            // the tracks are almost parallel
+            if (d < 1e-6)
+                  tcpa = 0.;
+            else
             //    Here is the equation for t, which will be in hours
-            double tcpa = ((fc * east) + (fs * north)) / ((fc * fc) + (fs * fs));
+                  tcpa = ((fc * east) + (fs * north)) / d;
+
+            // tcpa is past. we're closest as we will ever be now
+            if(tcpa < 1e-6)
+                  tcpa = 0.;
 
             //    Convert to minutes
             ptarget->TCPA = tcpa * 60.;
@@ -1739,9 +1759,6 @@
             ptarget->CPA = DistGreatCircle(OwnshipLatCPA, OwnshipLonCPA, TargetLatCPA, TargetLonCPA);
 
             ptarget->bCPA_Valid = true;
-
-            if(ptarget->TCPA  < 0)
-                  ptarget->bCPA_Valid = false;
       }
-
-      //    Compute the current Range/Brg to the target
-      double brg, dist;
-      DistanceBearingMercator(ptarget->Lat, ptarget->Lon, gLat, gLon, &brg, &dist);
-      ptarget->Range_NM = dist;
-      ptarget->Brg = brg;

[Ptizef]

Hi
I noticed some errors in object query windows :
- The bearing of the sector lights are in meter "(m)" instead of degrees (object SECTR1 .. SECTR2 etc ...)
-the sector are sorted on theirs color , not theirs bearing ( example : a three sectors light green,white,red with G=318°-325° ,W=325°- 331°,R=331°-340° should be sorted as G-W-R and not G-R-W)
- the periods are in meters "(m)" instead of seconds (object SIGPER)
-The visibility distance is in meters "(m)" instead of nautical miles (object VALNMR)
see shot light-1

Certain light buoys or towers the light characteristics are displayed and not for others see shot lights-2 .Is there a raison for that or is it a bug ?
Regards
Jean Pierre

[petermoree]

This error does not happen with the CM93 2010 chart data set

Peter

[jpiebrig]

Petermoree,

Hard to get CM93 2010 charts. Where do you find them ?

Jean-Pierre

[dougwm10]

Hi

Has anyone a download location for the windows version of rc615a ?????

For everyone needing a good website for charts, navigation programs (maxsea) and lots of other sailing info they should try CNF.SeaSoft

hope this helps .............. Doug

[dougwm10]

Try searching for cnf.seasoft or try www dot cnf dot by dot ru for downloads of all things sailing charts navigation programs etc

[bdbcat]

Hi folks...

Safely arrived Nova Scotia after 36 hour run, mostly in fog.

Beta 615 ran fine, although there is a small memory leak which I will track down immediately. Became apparent after 36 hours of course-up, quilted, lookahead operation.

There is still a problem uploading the Windows Beta binary to the site host. I have contacted the hostmaster, and hope to get this resolved soon.

I apologize to those testers waiting for this Beta, and thank you for your patience.

Studying the bug reports now...

Dave

[SethDart]

Here's a new patch (applies to current CVS) to add column sorting & right button menu to select visible columns.

This patch has some ugly parts with static variables & array values so I'm awaiting comments and review. There may be cleaner ways to achieve the same goals that I'm not thinking of right now. Please be gentle

For now, settings are not kept after closing the dialog.

[bdbcat]

Manimaul...

Will: Your second point is mysterious.

2.) Boat is slightly off the bottom of the screen where I can only see the course predictor line (I'm using a wide-screen monitor, not sure if it has an effect)

Have a look at the code, chart1.cpp line 5270

 
 int pixel_delta = cc1->GetCanvasHeight() / 4;
 double meters_to_shift = pixel_delta / cc1->GetVPScale();

 double dir_to_shift = gCog;

It should be shifting the boat position by 1/4 of the screen height, minus window decorations.

Try fiddling/debugging around here, and see what gives....

Thanks
Dave

[bdbcat]

SethDart....

Thanks for the comments.

1. possible div0. I agree with your analysis, although in thousands of hours underway I have never faulted here. Guess I was never parallel enough..... Will of course adopt your patch.

2.negative tCPA.
This may be a matter of personal preference. The way the current code works is as you describe. When the CPA has not yet happened, and the predicted CPA is within the specified alarm radius, the alarm is triggered. Once the CPA is reached, and the CPA is presumed to be now opening, the alarm is released. Of course the target is still within the specified alarm range for some time.

I like it this way. I know immediately when the CPA is opening as the alarm stops flashing/sounding. If one of us changes course/speed at this point, the alarm will be reactivated if necessary.

Not sure how other AIS monitors deal with this case.
Comments?

3. g_CPAMax_NM is checked elsewhere, so no harm in calculating here. Maybe the Options Dialog message could be clarified....

Thanks again
Dave

[bdbcat]

http://opencpn.org/downloads/beta/opencpn_210_setup.exe

Sorry for the delay

Dave

[dacust]

This may not be an issue that requires any action, but I thought I'd post it just in case anyone else runs into it.

In post 834 I had a problem with a chart that crashed the program, and then it crashed on restart every time.

In post 841 Dave said he found the problem, and gave me a work-around to get the program to run again. That worked fine.

But when I tried to install the latest version, I got this.



So, I tried to delete the .exe manually and got this.



After a re-boot, it installed just fine.

This is on Win 7 64 bit.

-dan