### 7.9. Symmetry Painting Dialog

Symmetry Painting is supported by brush-based tools (Pencil, Paintbrush, Eraser, Airbrush, MyPaint brush, Clone, Smudge, Dodge) as well the Ink tool. There are several kinds of symmetry, all configurable.

#### 7.9.1. Activating the Dialog

You can access this dialog from the main menu through: Windows → Dockable Dialogs → Symmetry Painting.

The dialog “Symmetry Painting” is dockable. Read قسمت 2.3, “Dialogs and Docking” to learn more about the concept of dockability.

#### 7.9.2. Using the Symmetry Painting dialog

شكل 15.142. Symmetry Painting dialog

This dialog is very simple. You only have a Symmetry item with a drop-down list that offers four options. As soon as you check a symmetry type, symmetry axes appear as dotted green lines in the image window and you can start painting with the brush you have chosen.

گزینه ها

Symmetry

  This setting determines the type of symmetry painting.

  هیچ‌کدام

    This is the default. It disables symmetry painting.

  آینه

    شكل 15.143. The Symmetry Mirror dialog

    This type of symmetry will reflect all strokes like in a mirror. There are several types of mirroring. More than one type can be selected.

    Mirror Options

    Horizontal symmetry

      Brush strokes will be mirrored across a horizontal axis.

    Vertical symmetry

      Brush strokes will be mirrored across a vertical axis.

    Central symmetry

      Brush strokes will be inverted through a central point.

    Disable brush transform

      When you transform the drawing, the brush itself will end up transformed as well. For instance, in a mirror transform, not only will your drawing on the right side of the canvas be mirrored on the left, but the brush itself is also “flipped” on the left.

      If you want the drawn lines to be mirrored (or other transformation), but not the brush outline itself, enable this setting. Obviously, you will only notice the effect of this setting when you use a brush that is not symmetrical.

    Vertical axis position, Horizontal axis position

      The default position for symmetry axes is the center of the image. These sliders allow you to change the position used to mirror your brush strokes.

      By clicking the lock icon next to the sliders, you can choose whether you want to keep both sliders synchronized or not.

  Tiling

    “Tiling” is a translational symmetry, which can be finite (with a maximum of strokes) or infinite. In the latter case, it is the perfect tool to create patterns or seamless tiles.

    شكل 15.144. The Symmetry Tiling Dialog

    This mode covers the image with strokes at regular distances on the X and Y axis.

    Tiling Options

    Interval X, Interval Y

      These are the intervals on the X and Y axis, in pixels, between the centers of each stroke.

    تبدیل

      This determines the amount of shift between lines on the X axis, in pixels.

    Max strokes X, Max strokes Y

      These are the maximum number of brush strokes on the X and Y axis that will be painted on the image. The default is 0, which means there is no limit.

      By clicking the lock icon next to the sliders, you can choose whether you want to keep both sliders synchronized or not.

  Mandala

    شكل 15.145. The Symmetry Mandala Dialog

    Strokes are drawn around the center determined by the options below.

    Mandala Options

    Center abscissa, Center ordinate

      These coordinates determine the center around which the mandala strokes will be painted.

      By clicking the lock icon next to the sliders, you can choose whether you want to keep both sliders synchronized or not.

    Number of points

      This determines the amount of strokes that will be performed each time you use a brush.

    Disable brush transform

      See the same setting for Mirror symmetry.

    Kaleidoscope

      When enabled, it mirrors consecutive strokes.

#### 7.9.3. Examples

Pepper brush is selected. Pencil is used.

Example for Mirror

  شكل 15.146. Vertical Symmetry

  A single click

  A stroke

Example for Tiling

  شكل 15.147.

  A single click. Shift = 20.

  A stroke

Example for Mandala

  شكل 15.148.

  A single click

  A stroke

7.8. Pointer Dialog |  | 7.10. Keyboard Shortcuts Dialog

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