How to achieve osg::Texture2D rotation 180?

[mirr...@gmail.com]

win10  gtx1080  osg3.6.4 

osg::ref_ptr<osg::Image> image =

    osgDB::readImageFile( "picture.bmp" );

osg::ref_ptr<osg::Texture2D> texture = new osg::Texture2D;

texture->setImage( image.get() );

[Voerman, L.]

This should do a 180 rotation:

image->flipVertical();
image->flipHorizontal();

Laurens.

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[mirr...@gmail.com]

Thank you very much, but this method only works for four point texture coordinates  

[Robert Osfield]

On Mon, 25 Jan 2021 at 07:39, mirr...@gmail.com <mirr...@gmail.com> wrote:

Thank you very much, but this method only works for four point texture coordinates 

You provide so little information about the context about what you want to do folks are left guessing what might be appropriate.

For instance, are you wanting to physically modify the image data so it's rotation 180?

Or are you just wanting to modify the texture coordinates of your geometry so the texture appears 180 different?

How to do both are completely different.  Which is appropriate for your case we have no clue.