(PECL cairo >= 0.1.0)
CairoContext::curveTo -- cairo_curve_to — Adds a curve
Object oriented style (method):
Procedural style:
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 ).
A valid CairoContext object created with CairoContext::__construct or cairo_create()
First control point in the x axis for the curve
First control point in the y axis for the curve
Second control point in x axis for the curve
Second control point in y axis for the curve
Final point in the x axis for the curve
Final point in the y axis for the curve
No value is returned.
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');