Hi Brian,

re:
> Question 1: What data is saved? Where and how is it saved?

The bitmap pixel data gets saved inside a data chunk in the .3dm file. So the bitmap will be contained inside the .3dm file and will be able to be displayed even if the original bitmap file is not present.


> Question 2: If the .3dm with embedded image(s) is loaded into Rhino 7, can the Image be viewed? (No?)
> Or can the image data be accessed in Rhino 7?

It's saved in what is called a "user data table", but the data inside the user data table is not accessible to Rhino, it doesn't know how the data inside the table is structured.


> Question 3: If the source bitmap image is deleted from the computer, can the bitmap image be restored
> from the embedded image in the .3dm?

There is not currently any method set up for extracting an embedded bitmap image out to a separate file again.

- Michael

Hi Michael,

Thank you for the responses. They make sense, and seem very logical.

Maybe I'll add "restoration of PNG, JPG, etc." to Version 6 withlist :-)

For my current low priority project, I'll just assume that for a loaded Image, that the associated PNG, etc. is available.

- Brian

Hi Brian, for the next v5 beta I've added a .getEmbeddedImage() function on background images which will return an image object that you can then call .save() on to extract an embedded background image back to a separate bitmap file.

- Michael

WOW!
Many superlatives being thought of...

Thank you Michael

I am wondering if .getEmbeddedImage function() will have any other methods? Or submethods.
(More methods not needed...)

- Brian

Hi Brian,

re:
> I am wondering if .getEmbeddedImage function() will have any other methods? Or submethods.
> (More methods not needed...)

Well it will return a bitmap image object which has these methods on it:

.save()
.getSaveFileName()
.copyToClipboard()

and also an .isValid property.

- Michael