|
 |
|
| |
Inside the Transformation tool dialog, you will find eight tools to modify
the presentation of the image or the presentation of an element of the
image, selection, layer or path. Each transform tool has an Option dialog
and an Information dialog to set parameters.
Some options are shared by several transform tools. We will describe
them here. More specific options will be described with their tool.
-
Transform
-
GIMP offers you three buttons which let you
select which image element the transform tool will work on.
![[Note]](images/note.png)
|
Note |
|
Remember that the Transform option persists when you quit the
tool.
|
-
When you activate the first button
the tool works on the active layer. If no selection exists in
this layer, the whole layer will be transformed.
-
When you activate the second button
the tool works on the selection contour only (the whole layer
contour if no selection).
-
When you activate the third button,
the tool works on the path only.
-
Direction
-
Direction sets which way or direction a
layer is transformed:
The “Normal (Forward)” mode will transform the
image or layer as one might expect. You just use the handles to
perform the transformation you want. If you use a grid (see
below), the image or layer is transformed according to the
shape and position you put the grid into.
“Corrective (Backward)” inverts the direction.
Primarily used with the Rotation tool to repair digital images
that have some geometric errors (a horizon not horizontal, a wall
not vertical...). See Section 4.5, “Rotate”.
-
Interpolation
-
The Interpolation drop-down list lets
you choose the quality of the transformation. For more
information about the different methods that can be employed,
see the glossary entry
Interpolation.
-
Clipping
-
After transformation, the image can be bigger. This option will
clip the transformed image to the original image size.
You can choose between several ways to clip:
-
Adjust
-
With Adjust: the layer is enlarged to contain all the
rotated layer. The new layer border is visible; the whole
layer becomes visible by using the
→
command.
-
Clip
-
With Clip: all what exceeds image limits is deleted.
-
Crop to result
-
If this option is selected, the image is cropped so that
the transparent area, created by the transform operation
in corners, will not be included in the resulting image.
-
Crop with aspect
-
This option works like the one described before, but makes
sure, that the aspect ratio is maintained.
-
Preview
-
GIMP lets you select among four Preview
possibilities:
-
Outline
-
Puts a frame to mark the image outline, with a handle on
each corner. Movements will affect this frame only on the
Preview, but the result of the transformation will concern
either the content or the boundaries of the selection
according to the selected Affect mode.
-
Grid
-
Puts a grid on the image, with four handles. Movements will
affect this grid only on the Preview, but the result of the
transformation will concern either the content or the
boundaries of the selection according to the selected
Transform mode.
-
Image
-
Here, the preview is a copy of the image superimposed on the
image, with an outline. Movements affect this copy and the
underlying image appears.
-
Grid+Image
-
Both turn at the same time.
Options with grid activate a drop-list with two options:
Number of Grid Lines will allow control
over the total number of displayed grid lines. Use the
slider to set the number of grid lines.
Grid Line Spacing allows control over
the distance between the grid lines. Use the slider to set
the distance.
-
Opacity
-
This slider lets you set the preview opacity.
|
|
Note |
|
When rotating a path, Preview options are not valid: only Outline is
active.
|
|
|
|
