LabVIEW
How to rotate objects or pictures on my FP?
I was always impressed with Altenbach's pure G implementation of the image rotate and zoom on the boat. There is lots to learn when it comes to raw image manipulation, and imaginary number math. But there are times when you may prefer to use an already developed library to do things like image manipulation, and I always wondered if I could perform the same functions shown here using .Net. So if you don't mind the platform dependency of Windows this can work.
Attached is my attempt to rotate an image, by an arbitrary angle. Now one thing my version doesn't do yet, is have a zoom control, but I suspect that is possible. But there are a list of neat features mine does that the native one doesn't.
With the attached VI you can rotate many different image types, images with alpha layer are supported, pivot points can be set anywhere, and the image is fit to the control size, which changes on window resize. No need to do more code to make the image fit, it just works without any extra work.
There could be improvements for sure. One issue is that the original image and the new image is the same size, but on a rotate parts of the image may fall outside the bounds. I think this can be fixed but I didn't look into it. Still this was a fun challenge that I hope to find a use for some day.
Very nice. But I wish you had more comments. For instance, why do you divide the size by 2?
@paul_a_cardinale wrote:
I just found this VI that i made long ago.
The inner code could probably be made into a VIM to avoid all that duplicate code...
