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Unless I have misunderstood your requirements, you cannot connect curves in that way.
A curve is a single path (open or closed) without any ‘branches’.
You can snap a node of one curve to another, so they are in the same place, but they will remain separate curves.
You can Merge Curves so they are in the same layer but you cannot create a curve which has more than one end/start point.

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4 hours ago, uncle808us said:

Is there some way to connect one curve to another.

Just out of curiosity - what reason/advantage should it have?


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3 hours ago, Pšenda said:

Just out of curiosity - what reason/advantage should it have?

The image I shared will eventually be a boot the line I want to join will be a line indicating a toe for the boot. As I change the appearance of the boot the toe line would follow the boot out line if it could be joined. 
PS . This can be done in Moho 11. Joining lines to do what I have explained here.

Thanks for inquiring.


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1 hour ago, uncle808us said:

As I change the appearance of the boot the toe line would follow the boot out line if it could be joined. 

However, if you use Merge Curves to combine both curves into a single Curves layer, as GarryP writes, their properties/appearance will change together - even if they are not joined.


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1 hour ago, Pšenda said:

However, if you use Merge Curves to combine both curves into a single Curves layer, as GarryP writes, their properties/appearance will change together - even if they are not joined.

Not working. see result image plus if you move the nodes they do not move together.

Thanks

Result.jpg


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Menu Layer, Fill Mode, Winding (not Alternate). 


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4 hours ago, Pšenda said:

Menu Layer, Fill Mode, Winding (not Alternate). 

I don't understand is this something you do before merging curves? I am using Affinity Photo and use layer menu> geometry> merge curves.

Thank you I appreciate your time and the enlightenment.


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 I tried it on a similar shape yesterday, and it worked fine for me.
image.png.7a9e214c15a91a2dc3a0be316b9ce533.png  image.png.d27d39d4882639bf4102f830ec3253c8.png

Today I'm trying it on a shoe similar shape, and unfortunately it doesn't work as expected 😞
image.png.ad1775ceb832accb63f26393dc0e35dd.png


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I adjusted yesterday's shape to the shape of a shoe, where it still works properly.
image.png.5324c9ff16faec80fa3030ce83446325.png

Shoe.afdesign


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1 hour ago, Pšenda said:

Today I'm trying it on a shoe similar shape, and unfortunately it doesn't work as expected 😞

From what I can tell, if you first set either both the closed curve & the open one to Winding & then combine them, or do that afterwards to the combined Curves layer, it works fine. But just setting the open curve to Winding before combining them rather annoyingly changes the open one back to Alternate after they are combined.


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OK Thanks guys using R C-R's tip about winding worked if I choose both nodes at once I can adjust the toe curve with the boot curve.

I still wish there was a way to add a branch to the original curve.

Thanks anyone using Affinity Photo the winding setting is only available in Affinity Designer as far as I can tell.

Again Many Thanks to Pšenda,  R C-R  and Garry P.


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FWIW - I don't know if there's a particular reason for using a closed and an open curve as a starting point, but you don't need to merge two curves, (at least for this particular drawing) you could just draw one continuous curve and fill it using winding mode. The fill will follow a line between the start and end nodes, so you just make sure the node where you want the "join" is directly over a line.

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26 minutes ago, PaulEC said:

FWIW - I don't know if there's a particular reason for using a closed and an open curve as a starting point, but you don't need to merge two curves, (at least for this particular drawing) you could just draw one continuous curve and fill it using winding mode. The fill will follow a line between the start and end nodes, so you just make sure the node where you want the "join" is directly over a line.

@PaulEC:  Thanks for the information and joining the thread all knowledge is welcome.


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2 hours ago, uncle808us said:

I still wish there was a way to add a branch to the original curve.

I can't remember its name or the details of how it works, but there is a different kind of vector implementation that permits multi-way branching nodes. Unfortunately, there seems to be very little interest in adopting it.

Maybe another user reading this knows more about it & will tell us more about it.


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Unless “a different kind of vector implementation that permits multi-way branching” can be successfully exported to formats like SVG and EPS (and maybe HTML), while keeping the formatting correct, then I wouldn’t think it would catch on any time soon.

Having said that, I agree that it would be interesting to know more about it as it may come to be a standard format in the future. (E.g. SVG wasn’t a standard format, until it was.)

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