Zezo forum:

Post by Teignmouthelectron | 2009-11-28 | 12:30:08

Hi Cvetan !

I was wondering whether it was possible or not to avoid going above the 60th South red line near Horn Cape ?

I congratulate you for your excellent work, efficient and simple to use !

16 Comments

Post by zezo | 2009-11-28 | 13:01:14

What's the story with the red line? I haven't seen anything about it in the instructions and I don't play that race myself.

Post by Teignmouthelectron | 2009-11-28 | 13:26:15

You "cannot" go below this line without damaging your speed.

Post by zezo | 2009-11-28 | 14:04:13

What's the damage exactly? I think it would be better to implement the damage than to restrict the movement.

Post by Teignmouthelectron | 2009-11-28 | 14:55:16

This is what MP is announcing:

"in lower part of this latitude your speed will be automatically reduced, degrees additional in the south will thus make you lose 75% of your speed"

As far as I've been able to notice, you can penetrate the area (below 60 S), but not too much.

This is why I wondered if avoiding the area was possible in your soft. Hope the question is clear and thanks for your quick answers zezo !

Post by Teignmouthelectron | 2009-11-28 | 21:42:17

OK, maybe the question is not clear (so are MP instructions) or you'll see that later.

Post by Sailkap | 2009-11-29 | 17:45:08

So will you tell us if/when it�s implemented.... :)

Post by zezo | 2009-11-30 | 18:34:07

I've modified the optimizer and now speed is decreased in half below 60 S. That is clearly visible in the isochrones and should be enough to avoid sailing there.

Post by OldChapZ | 2009-11-30 | 20:22:56

Thanks, Cvetan. You're too kind with us

I wondered why I don't have to move my destination 10/15� North anymore ;)

Post by Sailkap | 2009-11-30 | 22:27:09

Great tnx!!!!!!

Post by zezo | 2009-11-30 | 23:26:53

It was about 1-minute job and I should be doing more of these.

Just add this term: " * (pos->lat < D2R(-60) ? 0.5:1)"

here:

gc_destination(pos->lon,pos->lat, (angle+b)%360, get_speed(abs(angle), v) * penalty / timestep , &lon, &lat);

;-)

OldChapZ: penalty is the 5% subtracted for the "avoid tacks" option.

Post by OldChapZ | 2009-12-01 | 13:04:20

Mark of good programming habits.

It's obvious (the way you do it) : who has to deal with sin, cos, Lon2-Lon1. ;)

PS : BTW, did you change something ? It looks like we now have 1h steps at the beginning of the 7d track.

Post by Teignmouthelectron | 2009-12-01 | 00:51:08

Thanks Zezo

Post by Driftwood | 2009-12-16 | 19:11:05

So I just followed the red dots as the Z-track was going well below the redline when I was down there. Worked to get me out of the Follow the Zezo mind set! Im faster now! Zezo is a tool only a tool only a tool tool only a tool only a tool! Think!

Post by fred68 | 2009-12-16 | 22:57:47

When plotting a new course, there is only the option "pro sails" to mark. If I look at the suggested course, I see spin is often the choice. I do not have pro sails, and therefore not a spin. How can I rely on the course suggested?

Great job btw.

Cheers!