Slicing a Pie

[Phosphor]

How are your applied math skills? Were you good with word problems in school? (Really, I'm not kidding, your answers are kind of important here)

Your facility with selections, paths, and Photoshop in general?

Be honest.

[Mark Watzl]

Math Skills are OK...word skills where good (mainly I was Mouthy), I am a self taught Photoshoper so my skills are limited. Paths are foreign to me. I can handle an overview or a "step by step". All help accepted

[Cheesefood]

<homer> Mmmm.....pie </homer>

[George Austin]

Mark,

You should find the shape tool handy for locating equally-spaced vertices around a circle (the pie).

If you want to cut the pie into, say, seven equal pieces, create a seven-sided polygon path---sizing, dragging, and rotating it before releasing the mouse button so that it is centered and oriented as you like and so that its vertices lie on the circumference. Then draw radial lines from the circle's center to the polygon's vertices, and delete the path. The ease of rotation as you are forming the polygon is a striking feature of the shape tool.

Naturally, you could use any number of sides on the polygon. There may even be a way to pop all the radial lines in...

George

[George Austin]

Mark,

Ah yes! There IS a shortcut to getting those radial lines:

Select the polygon shape tool

Click the arrow to get polygon options

Click "Star"

Set "Indent sides" to 99%... Cool, cool!!

George

[John R Nielsen]

I read this here a while back:

Start with a square image. Fill it with vertical bars, top to bottom, width the same proportion to the total width as the percentage of the pie slice.

Filter > Distort > Polar Coordinates > Rectangular to Polar.

[George Austin]

John,

That's a goodie!!

To clean it up make a circular selection of any radius around the polar origin, invert the selection, and delete the external stuff.

George

[hot_denim]

In '87 I learn't that :

angle Of One Slice = 360 / Total Number Of Slices

I found it to be true.

[George Austin]

John,

Ooooh Yeah!! You scored again! Thanks.

George

[George Austin]

John,

Once I slice the pizza, I can't stop eating it...

If you make the initial square 360 x 360 pixels, then the width of each band is, conveniently, the angle subtended by the slice.

Perhaps more often when creating a pie chart, you want to divvy the pie up in percentages. In that case, make the square 100 x 100 pixels or, if that resolution is too crude, make it 1000 x 1000.

The trouble with pizza is you drink too much beer!!

George