Unfortunately TRANSFORM PICTURE applies the cropping coordinates to the full size picture not the scaled picture, which of course is way off
is there a reason why your image is scaled on screen? did you scale the image with TRANSFORM PICTURE or are you relying on the image's form object property to apply the scaling? if the area is fixed size, it might make your maths more simple if it the image were resampled with CREATE THUMBNAIL as a bitmap thumbnail to fit the exact area. also the form rendering would be faster if the object had no scaling property. --- the scaling factor of a proportional image depends on its orientation and the type of scaling you apply (e.g. xMidYMid): c.f. https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/preserveAspectRatio --- unlike resampling with CREATE THUMBNAIL, scaling with TRANSFORM PICTURE does not reduce the image quality. the result is the same as letting the form object do the scaling, except you have control over the ratio. https://doc.4d.com/4Dv17/4D/17.1/TRANSFORM-PICTURE.301-4179105.en.html --- but to answer you question, Is there a mathematical way to do this? Or perhaps another way to get this cropping to work? we have to figure out the maths. there is no other way. ********************************************************************** 4D Internet Users Group (4D iNUG) Archive: http://lists.4d.com/archives.html Options: https://lists.4d.com/mailman/options/4d_tech Unsub: mailto:[email protected] **********************************************************************
