First, establish where the centre is. Then establish the maximum radius.
Then use the Line tool. start at the centre and draw out to the radius.
In the Info panel in Photoshop (top-right), you can see the angle that the line is at, in degrees.
Each of the 20 segments is 18 degrees. Because you want a segment at the top, rather than a vertical wire/line, you need to start 9 degrees off vertical, then 27, then 45, 63, and so on, until you've done all the way around.
Make sure that you write down the coordinates of the centre of the board, and all the angles, radii and stuff (for doubles/trebles), as you'll need all this when you start coding to work out which segment the dart lands in.
Once you've got the basic wires in place, you can add more PS layers below it and start to pretty it up, and rub out the bits of line you don't want, for instance, where the 25/bullseye goes. Add a subtle drop-shadow effect to the wires layer to give it depth.
Then use the Line tool. start at the centre and draw out to the radius.
In the Info panel in Photoshop (top-right), you can see the angle that the line is at, in degrees.
Each of the 20 segments is 18 degrees. Because you want a segment at the top, rather than a vertical wire/line, you need to start 9 degrees off vertical, then 27, then 45, 63, and so on, until you've done all the way around.
Make sure that you write down the coordinates of the centre of the board, and all the angles, radii and stuff (for doubles/trebles), as you'll need all this when you start coding to work out which segment the dart lands in.
Once you've got the basic wires in place, you can add more PS layers below it and start to pretty it up, and rub out the bits of line you don't want, for instance, where the 25/bullseye goes. Add a subtle drop-shadow effect to the wires layer to give it depth.