ImagickDraw::pathCurveToQuadraticBezierSmoothAbsolute - Draws a quadratic Bezier curve
Вернуться к: ImagickDraw
ImagickDraw::pathCurveToQuadraticBezierSmoothAbsolute
(PECL imagick 2.0.0)
ImagickDraw::pathCurveToQuadraticBezierSmoothAbsolute — Draws a quadratic Bezier curve
Описание
$x
, float $y
)Draws a quadratic Bezier curve (using absolute coordinates) from the current point to (x,y). The control point is assumed to be the reflection of the control point on the previous command relative to the current point. (If there is no previous command or if the previous command was not a DrawPathCurveToQuadraticBezierAbsolute, DrawPathCurveToQuadraticBezierRelative, DrawPathCurveToQuadraticBezierSmoothAbsolut or DrawPathCurveToQuadraticBezierSmoothRelative, assume the control point is coincident with the current point.). At the end of the command, the new current point becomes the final (x,y) coordinate pair used in the polybezier.
This function cannot be used to continue a cubic Bezier curve smoothly. It can only continue from a quadratic curve smoothly.
Список параметров
-
x -
ending x coordinate
-
y -
ending y coordinate
Возвращаемые значения
Эта функция не возвращает значения после выполнения.
Примеры
Пример #1 ImagickDraw::pathCurveToQuadraticBezierSmoothAbsolute()
<?php
$draw = new \ImagickDraw();
$draw->setStrokeOpacity(1);
$draw->setStrokeColor("black");
$draw->setFillColor("blue");
$draw->setStrokeWidth(2);
$draw->setFontSize(72);
$draw->pathStart();
$draw->pathMoveToAbsolute(50,250);
// This specifies a quadratic bezier curve with the current position as the start
// point, the control point is the first two params, and the end point is the last two params.
$draw->pathCurveToQuadraticBezierAbsolute(
150,50,
250,250
);
// This specifies a quadratic bezier curve with the current position as the start
// point, the control point is mirrored from the previous curves control point
// and the end point is defined by the x, y values.
$draw->pathCurveToQuadraticBezierSmoothAbsolute(
450,250
);
// This specifies a quadratic bezier curve with the current position as the start
// point, the control point is mirrored from the previous curves control point
// and the end point is defined relative from the current position by the x, y values.
$draw->pathCurveToQuadraticBezierSmoothRelative(
200,-100
);
$draw->pathFinish();
$imagick = new \Imagick();
$imagick->newImage(700, 500, $backgroundColor);
$imagick->setImageFormat("png");
$imagick->drawImage($draw);
header("Content-Type: image/png");
echo $imagick->getImageBlob();
?>
Вернуться к: ImagickDraw