dRotation (Function)

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dRotation (Function)

In french: dRotation

Performs a rotation:

in an Image control,
in a variable of type Image.

Example

// Rotation du champ IMG_Image1 de 45 degrés
Résultat1 is boolean
Résultat1 = dRotation(IMG_Image1, 45)
IF Résultat1 = False THEN Error("L'opération a échoué")

Syntax

Performing a simple rotation Hide the details

<Result> = dRotation(<Image> , <Rotation angle> [, <Options>])

<Result>: Boolean

True if the rotation has been completed,
False otherwise.

<Image>: Control name, Image variable or picLayer variable

Image to use. This image can correspond to:
the name of an Image control.
the name of a variable of type Image.
The rotation is performed in relation to the center of the image. The image is directly modified.

<Rotation angle>: Real

Rotation angle (in degrees).
If the angle is positive, the image rotates clockwise.
If the angle is negative, the image rotates counterclockwise.

<Options>: Integer constant

Rotation options:
drAdapt The image is flipped and enlarged. Then, its size is reduced to correspond to the initial image size.
drDefault Enlarge the image (if necessary) so that it corresponds to the dimensions of rotated image.
Constant used by default for Image or picLayer variables.
drNoEnlarging The image is rotated but not enlarged: the image may be truncated.
Constant used by default for the Image controls.

Performing a rotation while modifying the center of rotation Hide the details

<Result> = dRotation(<Image control> , <Rotation angle> , <X of rotation center> , <Y of rotation center> [, <Options>])

<Result>: Boolean

True if the rotation has been completed,
False otherwise.

<Image control>: Control name

Name of the Image control to be used. The rotation is performed in relation to the center of the Image control. The image found in the Image control is modified.

<Rotation angle>: Real

Rotation angle (in degrees).

<X of rotation center>: Integer

X-coordinate (in pixels) of the new rotation center.

<Y of rotation center>: Integer

Y-coordinate (in pixels) of the new rotation center.

<Options>: Integer constant

Rotation options:
drDefault Enlarge the image (if necessary) so that it corresponds to the dimensions of rotated image.
Constant used by default for Image or picLayer variables.
drNoEnlarging The image is flipped but not enlarged
Constant used by default for the Image controls.

Remarks

End of drawing

If dEndDrawing and dRotation are called in the same process, the image changes will not be displayed.

Related Examples:

Unit examples (WINDEV): Image rotation

[ + ] Image rotation from any point that will be used as rotation center.

Business / UI classification: Neutral code

Component: wd300pnt.dll