CairoContext::curveTo
cairo_curve_to
Adds a curve
Description
Object oriented style (method):
public void CairoContext::curveTo
( float $x1
, float $y1
, float $x2
, float $y2
, float $x3
, float $y3
)
void cairo_curve_to
( CairoContext $context
, float $x1
, float $y1
, float $x2
, float $y2
, float $x3
, float $y3
)
If there is no current point before the call to CairoContext::curveTo
this function will behave as if preceded by a call to CairoContext::moveTo
(x1, y1).
Parameters
-
context
-
A valid CairoContext object created with
CairoContext::__construct or cairo_create
-
x1
-
First control point in the x axis for the curve
-
y1
-
First control point in the y axis for the curve
-
x2
-
Second control point in x axis for the curve
-
y2
-
Second control point in y axis for the curve
-
x3
-
Final point in the x axis for the curve
-
y3
-
Final point in the y axis for the curve
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->moveTo(10, 50);
$c->setLineWidth(5);
$c->setSourceRgb(.1, 0, 1);
$c->curveTo(20, 80, 80, 20, 90, 50);
$c->stroke();
$s->writeToPng(dirname(__FILE__) . '/curveTo.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_move_to($c, 10, 50);
cairo_set_line_width($c, 5);
cairo_set_source_rgb($c, .1, 0, 1);
cairo_curve_to($c, 20, 80, 80, 20, 90, 50);
cairo_stroke($c);
cairo_surface_write_to_png($s, dirname(__FILE__) . '/curve_to.png');
?>