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ImageRotateDrawingAxis

Last updated on May 30, 2024 | Also applies to ColdFusion

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Description

Rotates all subsequent drawing on a ColdFusion image at a specified point by a specified angle.

Returns

A ColdFusion image.

Function syntax

ImageRotateDrawingAxis(image, angle [, x, y])

History

ColdFusion (2018 release): Introduced named parameters.

ColdFusion 8: Added this function.

Parameters

Parameter	Description
image	Required. The ColdFusion image on which this operation is performed.
angle	Required. The rotation angle in degrees.
x	Optional. The x coordinate for the point of rotation. The default value is 0.
y	Optional. The y coordinate for the point of rotation. The default value is 0.

Usage

The default position of the origin is 0,0. To revert to the original drawing axis, call the same (x,y) parameters with the negative of the original angle. Use the ImageSetAntialiasing function to improve the quality of the rendered image.

Example

<!--- Use ImageNew to create a 300x300-pixel image. --->
<cfset myImage=ImageNew("",300,300)>
<!--- Turn on antialiasing to improve image quality. --->
<cfset ImageSetAntialiasing(myImage,"on")>
<!--- Set the drawing axis to 30 degrees and the point of rotation at (10,10). --->
<cfset ImageRotateDrawingAxis(myImage,30,10,10)>
<!--- Set the drawing color to blue. --->
<cfset ImageSetDrawingColor(myImage,"blue")>
<!--- Draw three shapes with the same color and drawing axis. --->
<cfset ImageDrawRect(myImage,150,10,10,150,"yes")>
<cfset ImageDrawOval(myImage,200,40,45,65,"yes")>
<cfset ImageDrawRect(myImage,275,10,10,150,"yes")>
<cfimage source="#myImage#" action="writeToBrowser">

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