### 5.9. Polar Coordinates

#### 5.9.1. Overview

Figure 17.76. Example for Polar Coordinates filter

Original image

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

This filter is found in the main menu under Filters → Distorts → Polar Coordinates….

#### 5.9.3. Options

Figure 17.77. “Polar Coordinates” filter options

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

  | Note
  These options are described in Section 2, “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

Figure 17.78. With text

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

Figure 17.79. With two horizontal bars

5.8. Newsprint |  | 5.10. Ripple

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