(PECL ps >= 1.1.0)
ps_curveto — Draws a curve
$psdoc
, float $x1
, float $y1
, float $x2
, float $y2
, float $x3
, float $y3
) : boolAdd a section of a cubic Bézier curve described by the three given control points to the current path.
psdocResource identifier of the postscript file as returned by ps_new().
x1x-coordinate of first control point.
y1y-coordinate of first control point.
x2x-coordinate of second control point.
y2y-coordinate of second control point.
x3x-coordinate of third control point.
y3y-coordinate of third control point.
成功时返回 true， 或者在失败时返回 false。