CairoContext
PHP Manual

CairoContext::arcNegative

cairo_arc_negative

(PECL cairo >= 0.1.0)

CairoContext::arcNegative -- cairo_arc_negativeAdds a negative arc

Description

Object oriented style (method):

public void CairoContext::arcNegative ( float $x , float $y , float $radius , float $angle1 , float $angle2 )

Procedural style:

void cairo_arc_negative ( CairoContext $context , float $x , float $y , float $radius , float $angle1 , float $angle2 )

Adds a circular arc of the given radius to the current path. The arc is centered at (x , y ), begins at angle1 and proceeds in the direction of decreasing angles to end at angle2 . If angle2 is greater than angle1 it will be progressively decreased by 2*M_PI until it is less than angle1 . See CairoContext::arc or cairo_arc() for more details. This function differs only in the direction of the arc between the two angles.

Parameters

context

A valid CairoContext object

x

double x position

y

double y position

radius

The radius of the desired negative arc

angle1

Start angle of the arc

angle2

End angle of the arc

Return Values

No value is returned.

Examples

Example #1 Object oriented style

<?php
// Creates the CairoSurface
$surface = new CairoImageSurface(CairoFormat::ARGB325050);

// Get the cairo context
$context = new CairoContext($surface);

// Appends the arc
$context->arcNegative(0010M_PI);
?>

Example #2 Procedural style

<?php
// Creates the CairoSurface
$surface cairo_image_surface_create(CAIRO_FORMAT_ARGB325050);

// Get the cairo context
$context cairo_create($surface);

// Appends the arc
cairo_arc_negative($context0010M_PI);
?>

See Also


CairoContext
PHP Manual