Unix and Linux Discussions Tagged with need help |
|
Thread / Thread Starter |
Last Post |
Replies |
Views |
Forum |
|
|
|
9 |
9,713 |
Shell Programming and Scripting |
|
|
|
2 |
12,781 |
Homework & Coursework Questions |
|
|
|
5 |
2,683 |
Shell Programming and Scripting |
|
|
|
0 |
2,775 |
Programming |
|
|
|
5 |
1,155 |
Shell Programming and Scripting |
|
|
|
6 |
2,511 |
Solaris |
|
|
|
18 |
14,286 |
Shell Programming and Scripting |
|
|
|
4 |
1,078 |
Shell Programming and Scripting |
|
|
|
11 |
10,779 |
Homework & Coursework Questions |
|
|
|
2 |
609 |
UNIX for Beginners Questions & Answers |
|
|
|
1 |
4,244 |
Shell Programming and Scripting |
|
|
|
1 |
860 |
UNIX for Dummies Questions & Answers |
|
|
|
1 |
2,071 |
UNIX for Dummies Questions & Answers |
|
|
|
1 |
1,897 |
UNIX for Dummies Questions & Answers |
|
|
|
1 |
1,673 |
UNIX for Advanced & Expert Users |
|
|
|
3 |
1,618 |
Shell Programming and Scripting |
|
|
|
4 |
1,535 |
Shell Programming and Scripting |
|
|
|
4 |
1,903 |
UNIX for Dummies Questions & Answers |
|
|
|
4 |
1,403 |
Shell Programming and Scripting |
|
|
|
2 |
1,364 |
Shell Programming and Scripting |
|
|
|
6 |
7,502 |
Shell Programming and Scripting |
|
|
|
1 |
1,302 |
Shell Programming and Scripting |
|
|
|
2 |
1,680 |
Shell Programming and Scripting |
|
|
|
4 |
1,659 |
Shell Programming and Scripting |
|
|
|
0 |
2,617 |
UNIX for Dummies Questions & Answers |
|
|
|
0 |
1,386 |
Shell Programming and Scripting |
|
|
|
4 |
1,503 |
Shell Programming and Scripting |
|
|
|
2 |
1,787 |
Shell Programming and Scripting |
|
|
|
1 |
1,417 |
Shell Programming and Scripting |
|
|
|
7 |
3,308 |
Shell Programming and Scripting |
|
|
|
2 |
3,442 |
UNIX for Advanced & Expert Users |
|
|
|
6 |
1,734 |
Shell Programming and Scripting |
|
|
|
4 |
2,545 |
UNIX for Dummies Questions & Answers |
|
|
|
6 |
2,401 |
Shell Programming and Scripting |
|
|
|
2 |
2,007 |
Shell Programming and Scripting |
|
|
|
3 |
2,100 |
Shell Programming and Scripting |
|
|
|
16 |
5,111 |
Shell Programming and Scripting |
|
|
|
1 |
3,206 |
Programming |
|
|
|
2 |
1,562 |
Shell Programming and Scripting |
|
|
|
14 |
4,705 |
UNIX for Dummies Questions & Answers |
CAIRO_ARC_NEGATIVE(3) 1 CAIRO_ARC_NEGATIVE(3)
CairoContext::arcNegative - Adds a negative arc
Object oriented style (method):
SYNOPSIS
public void CairoContext::arcNegative (float $x, float $y, float $radius, float $angle1, float $angle2)
DESCRIPTION
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(3) for more details. This function differs only in the direction of the arc
between the two angles.
PARAMETERS
o $context
- A valid CairoContext object
o $x
- double x position
o $y
- double y position
o $radius
- The radius of the desired negative arc
o $angle1
- Start angle of the arc
o $angle2
- End angle of the arc
RETURN VALUES
No value is returned.
EXAMPLES
Example #1
Object oriented style
<?php
$s = new CairoImageSurface(CairoFormat::ARGB32, 100, 100);
$c = new CairoContext($s);
$c->setSourceRgb(0, 0, 0);
$c->paint();
$c->setLineWidth(1);
$c->setSourceRgb(1, 1, 1);
for ($r = 50; $r > 0; $r -= 10) {
$c->arcNegative(50, 50, $r, 2 * M_PI, 0);
$c->stroke();
$c->fill();
}
$s->writeToPng(dirname(__FILE__) . '/CairoContext__arcNegative.png');
?>
Example #2
Procedural style
<?php
$s = cairo_image_surface_create(CAIRO_SURFACE_TYPE_IMAGE, 100, 100);
$c = cairo_create($s);
cairo_set_source_rgb($c, 0, 0, 0);
cairo_paint($c);
cairo_set_source_rgb($c, 1, 1, 1);
cairo_set_line_width($c, 1);
for ($r = 50; $r > 0; $r -= 10) {
cairo_arc_negative($c, 50, 50, $r, 2 * M_PI, 0);
cairo_stroke($c);
cairo_fill($c);
}
cairo_surface_write_to_png($s, dirname(__FILE__) . '/cairo_arc_negative.png');
?>
SEE ALSO
CairoContext::arc.
PHP Documentation Group CAIRO_ARC_NEGATIVE(3)