4.12. Polar Coords
| 4. Distort Filters |

### 4.12. Polar Coords

#### 4.12.1. Overview

图 16.62. Example for Polar Coords filter

Original image

“Polar Coords” filter applied

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

#### 4.12.2. Activating the filter

You can find this filter through Filters → Distorts → Polar Coords.

#### 4.12.3. Options

图 16.63. “Polar Coords” filter options

Preview

  The result of your settings will appear in the Preview without affecting the image until you click on OK.

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.

#### 4.12.4. Examples

图 16.64. With text

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

图 16.65. With two horizontal bars

4.11. Page Curl |  | 4.13. Ripple