Hi,
Sean has left the following comment at Write a "BRL-CAD Ray Tracing
Shaders" tutorial
http://www.google-melange.com/gci/task/view/google/gci2012/7994216:
sorta
So it looks like you did the first half, showing how to create the sphere
region, but not the second piece -- showing how to use the stack shader.
Also, you don't show how you made the renderings and the blue glass one is
not visible.
A tutorial needs to be completely reproducible. The easiest way to do that
from what you have now for the renderings is to tell them before the first
default sphere rendering to open the raytrace control panel and hit the
raytrace button OR to type "rt" in the command window (and instead use that
window screenshot).
In order to reproduce the glass sphere, you need to show what the
combination editor looks like to get a sphere that looks like that. The
image you have on bullet 6 looks like default parameters so it might better
belong in section 5.
Similarly in section 7, it needs to show the stacked shaders and all their
parameters. You should note that the ordering of shaders matters (eg, that
you must put plastic after checker to make it look 3D). You totally punted
in that section when you got to "Steps"... you're supposed to be showing
them an example. :)
Finally, the end of the article shouldn't directly link to those pdf files
at the end. Just link tell them there's an Intro to MGED and Shaders
presentation at brlcad.org/wiki/Documentation
Greetings,
The Google Open Source Programs Team
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