4.8. 遠近法

図14.139 Perspective tool

Perspective tool

The Perspective Tool is used to change the perspective of the active layer content, of a selection content or of a path. When you click on the image, according to the Preview type you have selected, a rectangular frame or a grid pops up around the selection (or around the whole layer if there is no selection), with a handle on each of the four corners. By moving these handles by click-and-drag, you can modify the perspective. At the same time, a Transformation information pops up, which lets you valid the transformation. At the center of the element, a circle lets you move the element by click-and-drag.

[注記] 注記

This tool is not actually a perspective tool, as it doesn't impose perspective rules. It is better described as a distort tool.

4.8.1. Activating the Tool

You can access the Perspective tool in different ways:

  • From the image menu bar Tools/ Transform Tools Perspective,

  • By clicking the tool icon: in Toolbox,

  • By using the Shift+P key combination.

4.8.2. Options

図14.140 Perspective tool options

「Perspective」 tool options

一般的にはこのツールを起用すると、 そのツールオプションがツールボックスの下に繋げられたウィンドウ上に現れます。 そのようなウィンドウが見あたらないときは、 画像ウィンドウのメニューより ウィンドウドッキング可能なダイアログツールオプション と辿れば今使っているツールのツールオプションウィンドウが開きます。

Transform; Interpolation; Direction; Clipping; Show image preview; Guides
[注記] 注記

これらのオプションについては 変形ツールの共通オプション に説明があります。

Constrain handles (Shift)

Constrain handles to move along edges and diagonal.

Around center (Ctrl)

Transform around the center point.

4.8.3. The Shear adjustment dialog

図14.141 The Shear adjustment dialog

The Shear adjustment dialog

Matrix

The information window shows a mathematical representation of the perspective transformation. You can find more information about transformation matrices on Wikipedia.

Readjust button

With this button, new in GIMP-2.10.10, you can readjust transform handles based on the current zoom level.