Hi,
I'm starting to use Gem.
A question: how can I create a black circle with radius R and coordinate center (x,y) inside a white canvas (1920x1080) and save the image as .jpg?
So I need at least 3 box numbers to set x, y, R parameters.

Thank you,
a.

@atux I think you will need to create a white background....
And then put a black circle......
drawing.pd
The jpeg quality is atrocious....... you will have to make a tiff and then compress it to a jpeg in another program.
The .tiff seems to be flipped on the Y axis in Gem 0.94..... it was fine in Pd extended.
It's not the only problem I have with 64-bit GEM...... so maybe it will be ok for you...?
David.

@whale-av said:

drawing.pd

Thank you.
Indeed the jpg is very degraded: but is it a bug?
The tiff however is ok.

Some questions:

The radius R and the x,y coordinates of the center: in what measurement units are they expressed? What does R=1 correspond to?
Where is the origin of the axes located in pixels with respect to the bottom left corner? (I would like to take it as the origin of the axes).

Why the 1920X1080 image window in not automatically adaptable or resizable to my 1366X768 monitor,? ...so I can't see what I'm drawing. Maybe it's better to create two separate images, like in your example, a smaller one for previewing and a large one for saving?

Thank you,
a.

@atux I almost never use Gem (probably because some of it doesn't work well on my windows 7 laptop).
You should download this "Ebook", which a very good read for Gem....
https://forum.pdpatchrepo.info/topic/12033/multimedia-programming-with-pure-data
... and it should answer all of your questions.
David.

By changing the 1 to 100 the jpeg looks as good as the tiff if not better and is much smaller in size