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show laylines to waypoint #149
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Available in v2.8.0 |
Laylines should only be visible when the waypoint is upwind. If the heading to the waypoint is direct, they should disappear. do you think that? |
Upwind...sure can add that. |
I think that I would show them until the wind exceeds 90 degrees |
Fixed in v2.8.2 |
About the laylines. in dashT tactics plugin explain the problem of laylines. |
Will fix 2. display when destination is upwind (not the vessel) |
@petsicola The Close Haul value in KIP settings is not available to Freeboard-SK, so it cannot be used to determine when to display the laylines. So, for clarity moving forward, I am going to propose that..... Laylines will be displayed when ALL of the following conditions are met:
Note: These rules will apply regardless of the vessel heading. If these rules are applied will this meet your use case? |
Yes! if that is a problem... I don't know.... Henry in that discord message gives a solution in node red and I think that we have to make something similar... sorry I have a poor english and we are talking by github. |
Some additional thoughts - there are several different things at play here.
If you have a destination / mark set and you know the boat's (present condition) upwind target angles you can show Upwind Mark Laylines. Same for downwind. These are not dependent on where the boat is pointing, only on the boat and mark's positions relative to the true wind direction. So when the mark is upwind of the boat the laylines are drawn downwind from the mark and vice versa if the mark is downwind. Boat laylines are not dependent on the destination being set, as they are just a function of the present true wind angle and the boat's upwind and downwind target angles. Boat laylines are drawn upwind or downwind from the boat, depending on where the boat is going (courseOverGround I think). If you have both Boat laylines and Mark Laylines available where they meet is the Tack point. Drawing the laylines for both tacks just up to the tack point results in the 4 line shape. https://chsmith.com.au/news/what-are-laylines-and-how-do-they-work-2013-04-24-8-31-07.html To summarise:
Second point: |
I concur with this explanation. To remove the confusion around the term layline, in the tacking angle settings (be it fixed or from a path), I prefer the term Close-hauled Angle when referring to the boat's upwind target angle. Using perf and polar will clear this. We are not there yet. but the data is! |
which is the path that I have to use to show lay lines??? |
They will show when bearing is +/- |
Laylines doesn´t appear always. in some casses. doesnt appear. |
show laylines to waypoint
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