CLASS RotImage EXTENDS Image

(Defined in: jpgraph.php : 7530)

RotImage	Image
SetAngle() SetCenter() SetMargin() SetTranslation()	RoundedRectangle() SetAlphaBlending() SetAntiAliasing() SetCanvasColor() SetExpired() SetImgFormat() SetMargin() SetQuality() SetTransparent()

Class usage and Overview

A subclass of Image class which implements a rotated version of all methods in the base Image class. The Image class used in JpGraph is actually not the class Image but rather this class as we want to have the rotating possibility. The rotation is accomplished by standard 2D rotation matrices.

Argument	Default	Description
$a		Angle in degrees

Argument	Default	Description
$dx		Specify rotation center X
$dy		Specify rotation center Y

Example

$width=600; $height=400;
$graph = new Graph($width,$height);
$graph->img->SetMargin($leftm,$rightm,$topm,$bottomm);
$graph->SetAngle(20);

// Rotate graph around the plots (0,0) point, i.e
// where the graph axis intersect.
$graph->img->SetCenter($leftm,$height-($topm+$bottomm));

function SetMargin($lm,$rm,$tm,$bm)

Specify margin for plot

Argument Default Description

$lm Left margin

$rm Right margin

$tm Top margin

$bm Bottom margin

Argument	Default	Description
$lm		Left margin
$rm		Right margin
$tm		Top margin
$bm		Bottom margin

Description

Specify the margin, i.e. the area on the side of the actual plot which is used for titles, labels, legends ans so on.

Example

$graph->img->SetMargin(30,30,50,20);

function SetTranslation($dx,$dy)

Specify translation (in pixels)

Argument Default Description

$dx Horizontal translation

$dy Vertical translation

Argument	Default	Description
$dx		Horizontal translation
$dy		Vertical translation

Description

The translation is applied after the rotation of the image.