Hi, everyone, I am Bojian (IRC nickname: boj) and will be excited to
participate in the Plate Mode NURBS ray tracing project in this year GSOC.
And I have already created a wiki page for this project (
http://brlcad.org/wiki/User:Bojian_ustc/GSoC2016/Project), could someone
give me some suggestions that do I need to make any changes to my proposal?
By the way, recently, I read the document and run some tests, then try to
understand some basic ideas about plate mode implemented in BoT primitive.
Here is my blog that maintains the recent activities(
http://bojianwu.github.io/gsoc2016), and I am now trying to generate some
B-rep models and using 'rtshot' to trace it and get some results. If I miss
some important parts regarding to test and verification, please let me
know, thanks.
Here are some problems that I have encountered currently.
1. I use 'obj-g' to generate two cube models, one with thickness and the
other one without thickness, when using 'rtshot' to ray trace the model,
they will output same result, does that result mean, the 'plate mode' is
only useful when the model is not a closed mesh(that is to say, the closed
mesh can always be considered as solid model)?
2. I create a single open NURBS surface(not closed mesh), and use 'rtshot'
to trace it, the result shows that the ray misses the object, could someone
give me some information? By the way, I use 'brep-cobb' to generate the
twisted cube model, then trace it, the result seems to be reasonable with a
in hit and a out hit point.
3. How to visualize the plate mode of BoT, I mean, how to show the
*thickness* in MGED?
Next, my arrangement is going to be following the 'rtshot' code, and try to
understand the basic ray tracing principles?
Besides, could someone give me some suggestions on how to start this
project in a proper way and make it proceed smoothly? Thanks with my great
appreciation.
Best,
Bojian
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