I'm trying to place small circles equaly distant along a semicircunference. Inkscape provides basic options to distribute horizontally and vertically, but can I do along a path, or in this case (if it's more easy) along a semicircunference?
Another possibility is to use radial clones, for cloning the small objects/circles around a common center, creating a circle of objects, and then deleting half of the circle, and "uncloning" the remaining objects.
It allows you to choose exactly how many clones you want in a full circle of 360 degrees.
Here is a video that shows how to make radial clones: http://www.youtube.com/watch?v=D0I51hXCdvE
- change the center of rotation of the object (the small circle), to set it in the center of the big imaginary circle, around which the objects will be cloned.
- select your small circle, go to Edit > Clone > Create tiled clones
- Clone settings: 1 row, 20 columns (or however duplications you need on a full circle)
- In Shift tab: per row, set shiftX to -100%, per column set shiftY to -100%
- In Rotation tab: per column: 360 divided by 20 (or your number) = 18 degrees.
- Click Create
Undo and adapt settings if necessary.
You can use Pattern on Path extension or the likewise named live path effect.
- Click the object twice to get rotation handles (or once and Shift+S).
- While holding Ctrl, left mouse drag the Rotation Center down.
- Open the Create Tiled Clones dialog (custom assigned to Ctrl+Shift+I in my keyboard preferences).
- On the Shift Tab, check the "Exclude tile" checkbox under the "Per column" heading.
- On the Rotation Tab, set "Rows, columns" to 1 x 6 and the "Per column" angle to 360° / 6 = 60° to generate 6 duplicates on a full circle.
Hit the "Create" button.
See "Use saved size and position of the tile" at DuckDuckGo for documentation on that setting.