How do I divide a closed curve into two with different colors without having them divided into two shapes?

[derrapf]

Hello all

I hope somebody can understand my problem.  I am new to Affinity Designer and already searched the web and youtube but I cannot find a solution. Maybe it's to easy what I want to achieve or it does nort work at all this way.

What Do I want to do:

* I created a closed curve of a certain shape. Let's be easy and asume that it's just a square

* Now I would like to draw a none horizontal line from one side of the square to the opposite side. Let's say from node A to node B.

* This line now should subdivide the square in two tetragons.

* So the ends of that the line (A and B) would be two nodes belonging to the upper tetragon and the lower tetragon as well

* All the methods I found would subdivide my square into two independend objects (the two tetragons)

* But what I want to achive is to be able to move the node A to any positon and it should affect the shape of the two tetragons concurrently.  If I woud move the node A to the bottom and node B to the top I would end up with two triangles.

 

Is such possible?

I just want to design my both shapes by repositioning the nodes where the intersect.

 

BR Ralf

[walt.farrell]

Welcome to the Serif Affinity forums.

4 minutes ago, derrapf said:

So the ends of that the line (A and B) would be two nodes belonging to the upper tetragon and the lower tetragon as well

That is not possible.

A node cannot belong to multiple objects.

[Aammppaa]

There is a way... but it is involved, and requires the use of Photo as well as Designer.

I have found that Linked objects (in Photo) are often more versatile than Symbols (in Designer) despite apparently doing the same job! In this case: Symbols can't be used to create Compound groups, but Linked objects can.

Method...

1. Use Photo to create a vector shape. This will be our Slicing object. Create a duplicate of the Slicer, and use the Link panel to link the two instances.

2. Save your file, and then Edit in Designer.

3. Create a Compound Shape using your Slicer to Subtract from a Rectangle.

4. Duplicate the Compound Shape, and change the mode of the Slicer to XOR.

Result...

You will have two shapes, that fit perfectly together. Changes to one, will instantly apply to the other. 

[derrapf]

yes! yes! yes!

That is exactly, what I want to achive.

Too bad that is some sort of complicated, but hey: I will give it a try.

Thanks a lot for the description above. I will be in vacation soon and will have a lot of time trying out

 

BR Ralf

[BlueLiner]

If all you want is a square or rectangle  with two colors, why not just draw a square, then say a rectangle converted to curves then clipped to the square. Edit the nodes as desired. Here is a screen cap but I use the pen tool for the clipped shape with my 2nd color then move its nodes around as desired (and probably remove the stroke - I forgot to in the video):

 

[derrapf]

Ah Ok. Maybe this is also an option

Actually I am designing knifes with Affinity. So the main shape is the outline of the knife (how the steel has to be cut) and the second line is where the main bevel begins (grind line). It's starting from the riccasso and ending at the tip of the blade. It's defining the line where I have to grind (see picture below).
I want to be able to modify and play around with the grind line until the knife looks nice.

So when the bevels gets smaller (the grindline goes to the edge) the flat face of the blade gets wider. As well as I change the plunge line (The curve of the bevel at the riccasso) , the bevel will get smaller and the flat part of the knife will get wider.

Same thing with the scales. Here I would like to play around with that line where the scales start until I end up with a nice shape.

 

BR Ralf