CairoContext::copyPathFlatCairoContext::curveTo
cairo_curve_to
(PECL cairo >= 0.1.0)
CairoContext::curveTo -- cairo_curve_to — Adds a curve
Descrizione
Stile orientato agli oggetti (method):
$x1
, float $y1
, float $x2
, float $y2
, float $x3
, float $y3
)Stile procedurale:
$context
, float $x1
, float $y1
, float $x2
, float $y2
, float $x3
, float $y3
)
Adds a cubic Bezier spline to the path from the current point to position x3
,y3 in user-space coordinates, using x1,
y1 and x2, y2 as the control
points. After this call the current point will be x3, 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).
Elenco dei parametri
-
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
Valori restituiti
Nessun valore viene restituito.
Esempi
Example #1 Stile orientato agli oggetti
<?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 Stile procedurale
<?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');
?>
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User Contributed Notes
CairoContext::curveTo - [0 notes]