Thank you very much, but this method only works for four point texture coordinates  <br><br><div class="gmail_quote"><div dir="auto" class="gmail_attr">在2021年1月19日星期二 UTC+8 下午10:32:48<l.vo...@rug.nl> 写道：<br/></div><blockquote class="gmail_quote" style="margin: 0 0 0 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"><div dir="ltr"><div>This should do a 180 rotation:</div>image->flipVertical();<br>image->flipHorizontal();<div>Laurens.<br><div><br></div></div></div><br><div class="gmail_quote"></div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Tue, Jan 19, 2021 at 1:21 PM <a href data-email-masked rel="nofollow">mirr...@gmail.com</a> <<a href data-email-masked rel="nofollow">mirr...@gmail.com</a>> wrote:<br></div></div><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div>win10  gtx1080  osg3.6.4 </div><div><br></div><div>osg::ref_ptr<osg::Image> image =</div><div>    osgDB::readImageFile( "picture.bmp" );</div><div>osg::ref_ptr<osg::Texture2D> texture = new osg::Texture2D;</div><div>texture->setImage( image.get() );</div>

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