(PHP 5 < 5.3.0, PECL ming SVN)
SWFShape::drawCurveTo — Draws a curve
$controlx
, float $controly
, float $anchorx
, float $anchory
[, float $targetx
], float $targety
) : int此函数是实验性的。此函数的表象，包括名称及其相关文档都可能在未来的 PHP 发布版本中未通知就被修改。使用本函数风险自担 。
swfshape::drawcurveto() draws a quadratic curve
(using the current line style, set by swfshape::setline())
from the current pen position to
(anchorx,anchory)
using (controlx,controly)
as a control point. That is, head towards the control point,
then smoothly turn to the anchor point.
With 6 parameters, it draws a cubic bezier to point
(targetx, targety)
with control points (controlx,
controly) and
(anchorx, anchory).
for those new this all this, "anchor" is where you want to end up and "control" is the point you would go to if you were drawing a square.
for example, this would draw a quarter circle
<?php
$s->movePenTo(100, 100);
$s->drawLineTo(200, 100);
$s->drawCurveTo(200, 200, 100, 200);
$s->drawLineTo(100, 100);
?>