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Posted

Good day everyone!

I am trying to add a node here(refer to Sketch.png attached). I couldn't achieve it using the node tool, as it doesn't snap to the intersection.

In Adobe Illustrator, we can achieve this by selecting both the open paths and selecting "divide" in the Pathfinder panel.

When I do the same in AD, the straight line disappears and the open path(selected path) turns to a closed one.

I'm trying to figure how to achieve this simple thing in AD.

Please help!

 

Sketch.png

Posted

Hi Vishnu,

 

This workaround will only work if one of the intersecting elements is a straight line or segment. So in this case you're in luck :).

 

Add a node anywhere on the straight line. 

Make sure Snap to Object Geometry is checked in snapping options.

Now hold down the shift key and move the new point. If your cursor movement follows reasonably close to the line the point will be constrained to the straight line. Move it til it snaps onto the target geometry.

 

If you want the new point on the curve instead, do the above then zoom in super close to the snapped point on the straight line. Add a point on the curve right close to it and snap the curve point to the first point. Delete the first point if needed. Sure technically it's changing the curve slightly, but if you do it when zoomed in 1,000,000% I really don't think it'll be noticeable at 100% ;)

(Edit: but then again if you have to zoom way in you probably don't even need the first point. Just add a point on the curve super close to the intersection and snap it to the straight line.)

 

(But, we really do need a simple intersect option)

Posted

Hi JimmyJack,

Thanks for the help!

What you have said definitely works but it is hard to zoom in super close to add a point every time and is not precise.
I agree it is not noticeable at 100% but precise one is much better.

14 hours ago, JimmyJack said:

Add a node anywhere on the straight line. 

Make sure Snap to Object Geometry is checked in snapping options.

Now hold down the shift key and move the new point.

It would be really helpful if your above mentioned process works with curves too.

But a simple intersect option is a must.

 

Posted
19 hours ago, Vishnu Raghav said:

In Adobe Illustrator, we can achieve this by selecting both the open paths and selecting "divide" in the Pathfinder panel.

When I do the same in AD, the straight line disappears and the open path(selected path) turns to a closed one.

For what very little it is worth, this happens because in Affinity a straight line is considered to be a one dimensional object that has no area (the stroke width is ignored). So when it is part of a divide operation it is removed. For some unknown reason, the divide op also closes open paths, even if applied to a single open path.

 

Even if the line is a two node open path, if you bend it slightly, that gives it an area, & the divide operation will work, but it won't help much because you end up with 3 closed paths, like in this divide op.afdesign example:

divide.png.20c920af35a6eddf113d8c71f3e9256c.png

It isn't obvious from the screenshot, but the black curve includes all the nodes of the blue curve & attempting to subtract the blue one from the black one probably will generate a bunch of extraneous nodes. That can be cleaned up, but you still end up with two nodes on the black path at the two intersection points, & deleting one of them will deform the shape at least slightly. Even if you don't delete one of them, the tiny segment connecting them is straight, so the curve is still deformed slightly.

 

It ends up being an exercise in futility. :(

All 3 1.10.8, & all 3 V2.6 Mac apps; 2020 iMac 27"; 3.8GHz i7, Radeon Pro 5700, 32GB RAM; macOS 10.15.7
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Posted
1 hour ago, R C-R said:

Even if the line is a two node open path, if you bend it slightly, that gives it an area, & the divide operation will work, but it won't help much because you end up with 3 closed paths,

Wow this worked, I didn't know that before.

By doing a subtract operation by selecting both the paths, it leaves only one closed path.
By selecting both the end nodes of the path which needs to be remove, we can select the break curve option and delete the unwanted path.

So it has become little easier than before.
But a path intersection option is a must.

Demo.png

  • 3 years later...
Posted (edited)

I’m having the exact same question – but for Designer on iPad! (Will ask in the iPad specific forum.)

Your discussion dates back to 2017 ... any news on this? Did Serif add a feature to help creating a node at an intersection of two curves?

Edited by metawops
  • 1 year later...
Posted

Those yellow lines don't appear for me. Based on the comments above it sounds like they don't appear for others either. Feel free to share if you know how to replicate what you're seeing.

Versions

    macOS: Big Sur 11.5.2
    Affinity Designer: 1.10.5

Posted

Works for me every time: Take the Node tool select both objects - hoover cursor along curves till it gets highlighted either the upper or the bottom object - click to insert node.

My specs:

image.jpeg.52114b7312501c8fd585b2cc9f27c856.jpeg

26 minutes ago, Blake Gearin said:

Feel free to share if you know how to replicate what you're seeing.

Posted
1 hour ago, Blake Gearin said:

Those yellow lines don't appear for me.

Make sure at least the snapping option "object geometry" is checked:

350661191_snappingoptionShapeToolsObjectGeometry.jpg.41c104663e84cd82d2156654b4915d78.jpg

• MacBookPro Retina 15" |  macOS 10.14.6  | Eizo 27" | Affinity V1  
• iPad 10.Gen.  |  iOS 18.5.  |  Affinity V2.6

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