CairoMatrix::initRotate()

(PECL cairo >= 0.1.0)

Creates a new rotated matrix

说明

面向对象风格(method):

publicstaticCairoMatrix::initRotate(float $radians): void

过程化风格:

cairo_matrix_init_rotate(float $radians): object

Creates a new matrix to a transformation that rotates by radians provided

参数

$radians

angle of rotation, in radians. The direction of rotation is defined such that positive angles rotate in the direction from the positive X axis toward the positive Y axis. With the default axis orientation of cairo, positive angles rotate in a clockwise direction.

返回值

Returns a new CairoMatrix object that can be used with surfaces, contexts, and patterns.

范例

Example #1 面向对象风格

<?php
/* Create a new Matrix */
$matrix = CairoMatrix::initRotate(0.3);
?>

Example #2 过程化风格

<?php
/* Create a new Matrix */
$matrix = cairo_matrix_init_rotate(0.3);
?>

参见

• CairoMatrix::__construct() Creates a new CairoMatrix object
• CairoMatrix::initIdentity() Creates a new identity matrix
• CairoMatrix::initScale() Creates a new scaling matrix
• CairoMatrix::initTranslate() Creates a new translation matrix