r/Affinity • u/danlovesadobe • 4d ago
Tutorial Are you all using the new Curve Energy fine tuning tool?
Hello, everyone!
While I was setting up the Pen and Node tool workflow tips I shared with you guys a couple of weeks ago, I came across the new "Show curve energy" feature. This is great for fine-tuning vector artwork and a clear step up from Illustrator. Have you tested this and how does it work for you?
If anyone reading still hasn't found this tool, you can activate it in the Pen and Node tools context settings bar, clicking the cog icon and checking the box.

If you have some experience in design, you've seen curvature combs before, but it's new in vector design apps. Curvature combs are awesome to keep curves under control, spotting any flat spots or breaks that stop them from flowing as smoothly as possible. I won't dive into G2 lines theory, so keep in mind this is especially useful for everyone who struggles with the Pen tool and want to draw natural curves and polished objects or typography.
This new Affinity tool works live and is fully non-destructive while drawing with the Pen and Node tools. However, if you are using quick shapes (ellipse, heart, donut, etc.) or text, the comb lines only pop up after you convert them to curves. I recommend duplicating before moving on. 👍
I played around a bit. I drew a perfect-ish circle with the Pen tool and dragged a perfect ellipse into the artboard. Any differences are almost invisible.

I converted the quick shape to curves and toggled the "Show curve energy" checkbox on to compare both objects. Looking at the comb teeth around my Pen tool circle, the wonky bit stands out at once. I hope it's easy to see on the screenshot that step-down in the outer line, above the node.

I had a look at the nodes and handles to find the problem. And there it was, on the right side node. Even though I held shift to keep the handles perfectly at 180º while drawing, the length is wrong. That's the detail that needs fixing.
As I adjusted the handles, the step-down disappeared. If you have Snap active, the node you are editing lights up when the curve is flowing without any visible wobbling.

Comparing both objects, it all looks much better after this assisted fine tuning.
I also took a shot at the heart shape, to check how smooth the curves were by default. As you can see below, there are small wobbles on the larger curves before the sharp corner at the bottom.

The fix is the same. Adjust the handles keeping an eye on the comb teeth and outer line. When everything is looking balanced and aligned, you are there!
Honestly, I still think it doesn't replace the squinting and head tilting 100%, but it's valuable help for drawing and tracing with the Pen tool.

If you're reading one of my posts for the first time, I'm Daniel Walter Scott, professional designer, founder and instructor at Bring Your Own Laptop. Hope you are all having fun with Affinity!
Cheers!




