yvonne leduc wrote:
I would like some confirmation or explanation about the differences I
see, and the way I understand it.
Hello Yvonne,
The command "ray" does not care about the size of your display, it may
even be used in batch mode on a computer that does not have a monitor
attached to it at all.
To prevent the "cropping" or "zooming" on images created by the "ray"
command you have to make sure that the aspect ratio of the width and
height of the ray command are the same as the aspect ratio of your
current viewport.
Example 1)
if you will be rendering (thats what the command ray does)
figures of 2000 x 2000 you should choose a viewport of
say 700x700, then:
2000 / 2000 = 1 = 700 / 700
- so you should execute the command:
viewport 700, 700
- and then fine tune your figure and then run the ray command:
ray 2000, 2000
Exmaple 2)
- you want images at 3000 Width x 2000 Height
3000 / 2000 = 1.5
- your limiting display size is your height so
try for instance height = 768
width = height * 1.5 = 768 * 1.5 = 1152
- but 1152 is wider than your display (1024) so lets try height = 500
width = 500 * 1.5 = 750 (which is good now, or at least it fits)
- so you would issue the command
viewport 750, 500
- then ray 3000, 2000
And the reason for all this is ...
... is a *.png image created with ray 1000,750 going to be good enough
for publication standards? Is there much benefit in going higher? what
causes the limits, if any?
The journal usually specifies the resolution at which the images will be
printed.
If the journal says images print at 300 dpi (Dots Per Inch) and your
figure will have a final printed width of 3 inches then you want to
render images with a width of 900.
The publisher will usually scale the picture with a very good software
so even if it has to be "enlarged" by a few pixels the result will be
good. But if it has to be shrinked you may run into trouble with labels,
thin lines etc.
Hope this helped a bit.
Zac
--
Ezequiel PANEPUCCI, Ph.D. - Institut Pasteur
Plate-Forme 6 - Cristallogénèse et Diffraction des Rayons X
Telephone: +33 (0)1 44 38 94 57
Portable: +33 (0)6 13 14 39 06
