You can use the **
Transformations** panel to configure a stack of transformations that are
executed in ascending order.
Press the **Add** button to create a new
transformation item and add it at the bottom of the list. The **Delete**
button removes the selected transformation. You can move the
transformations in the list with your mouse to change their order.
Each transformation has five properties: **
Type**, **Angle**, **Amplitude**, **Frequency**, **Phase**
and **Shift**. The
**Type** property defines the style of the transformation like linear,
wave and quantize.
Use the **Angle** value to rotate the transformation. By default, at an
angle of 0°, a transformation modifies the image horizontally.
The **Amplitude** defines the strength of
the transformation. For example the transformation **Linear** at an
angle of 0° and an amplitude of 100% shift then image 50% to the left at
the top of the image and 50% to the right at the bottom of the image.
The **Frequency** value specifies the
number of repetitions along the dimension, that is orthogonal to the
dimension where the transformation takes effect (ordinate). When you
apply, for instance, a **Wave** transformation horizontally (angle =
0°) and set the frequency to 200%, you get two complete wave periods along
the vertical dimension (abscissa).
Use the **Phase** value to move the
transformation along the abscissa. The **Shift** attribute defines an
offset along the ordinate.
Enable the **Keep Aspect Ratio** checkbox
to scale the transformation horizontally or vertically when you apply the
transformations to a non-square image. |