Provides utility functions for matrix4x4 when used for 2D transforms. 更多...
| import 语句： |
import QtQuick
|
| Since: | Qt 6.8 |
The
PlanarTransform
is a global object with utility functions.
它不可实例化；要使用它，调用成员来自全局
PlanarTransform
对象直接。例如：
Item { transform: Matrix4x4 { matrix: PlanarTransform.fromAffineMatrix(1, 0, 0.36, 1, -36, 0) } }
|
matrix4x4 fromAffineMatrix ( real scaleX , real shearY , real shearX , real scaleY , real translateX , real translateY ) |
Returns a matrix4x4 for an affine (non-projecting) 2D transform with the specified values.
This method and its argument order correspond to SVG's
matrix()
function and the six-argument
QTransform
constructor. The result is this 4x4 matrix:
| scaleX | shearX | 0 | translateX |
| shearY | scaleY | 0 | translateY |
| 0 | 0 | 1 | 0 |
| 0 | 0 | 0 | 1 |
|
matrix4x4 fromRotate ( real angle , real originX , real originY ) |
Returns a matrix4x4 for a 2D transform that rotates by angle degrees around the point ( originX , originY ).
originX and originY are optional and default to (0, 0).
|
matrix4x4 fromScale ( real scaleX , real scaleY , real originX , real originY ) |
Returns a matrix4x4 for a 2D transform that scales by scaleX 水平和 scaleY vertically, centered at the point ( originX , originY ).
originX and originY are optional and default to (0, 0).
|
matrix4x4 fromShear ( float shearX , float shearY , float originX , float originY ) |
Returns a matrix4x4 for a 2D transform that shears by shearX 水平和 shearY vertically, centered at the point ( originX , originY ).
originX and originY are optional and default to (0, 0).
|
matrix4x4 fromTranslate ( real translateX , real translateY ) |
Returns a matrix4x4 for a 2D transform that translates by translateX 水平和 translateY vertically.
|
matrix4x4 identity () |
Returns a matrix4x4 for the identity transform.
这相当于 Qt::matrix4x4 ().
