GIMP Version: 2.8.14
Operating System: Windows
GIMP Experience: Basic Level

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Hi,

I am just making the tutorial of a speed gauge
http://gimpchat.com/viewtopic.php?f=23&t=4660

It was quite tricky for me since the author didn't mention some steps which are then hard to realize for a beginner, but I finally succeeded (with some deductions, though).

Now I am trying to enhance my picture the way that I want to create a circle which blends from green to yellow to red (similar to the ring in http://cdn-6.freeclipartnow.com/d/42886 ... ometer.jpg)

I tried to create a rectangle, blend it and then use Filter -> Distort -> Curve Bend, but that is way to hard to align correctly.

Any ideas how this can be done?

Sincerely,
Dietmar

Do you mean something like this?

Instead of using Curve Bend, try using Polar Coordinates to bend your rectangle. Note how the rectangle is located on its layer.

I think that this is the quickest way to do this, but it looks very jagged along the edge. Much more so than the one I made without using Polar Coordinates.
Is this what's being asked for anyway?

- Circle selection (use guides to mark the center), and border the selection (better results: to concentric circle paths, as used below)
- Conical-Asymetric gradient, with same center as the circle
- Remove the bits you don't want (triangle selection, with one summit on the circle center).

And then it just becomes a matter of pre-defining the gradient. If you want to cover a 270° angle make a gradient with three segments, first segment from 0 to .125 (colors indifferent), last segment from .875 to 1.00 (colors indifferent) and your gradient on the middle segment(s) (only one used below):



Better version with a 4-segments gradient, XCF and gradient attached:

The gradient:

Another way to handle the selection for an even better result:

- Create a circle path
- Cut off the part of the circle you don't want (add two points on same horizontal, and remove the bottom anchor and the two segments
- On a transparent layer, stroke the segment in line mode (any color will do), with the line width you want, and with the round end caps.
- Get a selection using alpha to selection on that layer, and then discard the layer
- Use that selection on the conical gradient as above

I downloaded the RedZone gradient and I get this message when refreshing. "corrupt segments - do not span the range 0.1

Thanks for reporting. That will teach me to do them by hand Fixed, please try again.

thanks ofnuts

Yes, exactly.

Thank you all!
Dietmar

There is also the pan to bow script available here.
http://registry.gimp.org/node/20869

Hi,

all worked, thank you!

Perhaps for some of you it might be interesting:

Online Gradient Generators:
http://patorjk.com/gradient-image-generator/
http://angrytools.com/gradient/

Image2Gradient Converter:
http://registry.gimp.org/node/25571

Worked marvellous for me!

Dietmar