View Full Version : GIMP semi-circle

Mar 19, 2006, 04:48 PM
This should be easy. Its bugging me that I can't find it. What I am trying to do is make a semi circle. Like the image attached. But I want it perfectly centered and perfectly symmetrical. How would I do this?

Mar 19, 2006, 08:20 PM
Make a normal circle, then delete the bottom half?

Mar 19, 2006, 10:01 PM
Make a normal circle, then delete the bottom half?

That, or create a rectangle over half of it in the background/eraser colour.

You can always do it separately save it and pull it into something else, right?

Mar 19, 2006, 11:37 PM
As a GIMP person myself this got me thinking, and the easiest way I can think of is by using the 'Select elliptical regions' tool.

Use the 'Select elliptical regions' tool to create an outline of a full circle
Then use the 'Fill' tool to fill the circle with a solid color
Then again use the 'Select elliptical regions' tool to create another circle within the solid circle(choose however thick you want the solid area to be), then clear the new selection (control+k)
Now you can cut/cover the circle at any point to make it a semi-circle using the 'Select rectangular regions' tool.
Then you can touch up the end points how ever you like

added a little demo attachment

Jul 8, 2014, 12:26 AM
for anyone who this will help, what you want to do is use the path tool. you can find this in the toolbox.

decide where you want a diameter of your circle to be.
click once for one endpoint of the diameter.
then click again for the other endpoint of the diameter.
this should create a line segment.

click on the line segment and continue to hold down while you drag it to your desired position. an arc should begin to form and move with your cursor.

finally, stroke the path using your desired settings (pixel size, color, etc.).