5.9. Polar Coordinates

5.9.1. Overview

图 17.74. Example for Polar Coordinates filter

Original image

“Polar Coordinates” filter applied

It gives a circular or a rectangular representation of your image with all the possible intermediates between both.

5.9.2. Activating the filter

You can find this filter through Filters → Distorts → Polar Coordinates….

5.9.3. Options

图 17.75. “Polar Coordinates” filter options

Presets, “Input Type”, Clipping, Blending Options, Preview, Split view

	注意
	These options are described in 第 2 节 “Common Features”.

Circle depth in percent

Slider and input box allow you to set the “circularity” of the transformation, from rectangle (0%) to circle (100%).

Offset angle

This option controls the angle the drawing will start from (0 - 359°), and so turns it around the circle center.

Map backwards

When this option is checked, the drawing will start from the right instead of the left.

Map from top

If unchecked, the mapping will put the bottom row in the middle and the top row on the outside. If checked, it will be the opposite.

To polar

If unchecked, the image will be circularly mapped into a rectangle (odd effect). If checked, the image will be mapped into a circle.

X, Y

These polar coordinates are active only if the “Choose middle” option is unchecked.

Choose middle

Checked by default: origin center is at the middle of the layer. If unchecked, you can modify X and Y parameters to position the origin center.

5.9.4. Examples

图 17.76. With text

If you have just written the text, you must Flatten the image before using the filter.

图 17.77. With two horizontal bars