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sanket_ |
i want to contribute to annotations project.
Can someone help me with getting started? Thanks :) |
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07:34.31 |
brlcad |
gabbar1947: see src/librt/primitives/table.c
and the corresponding rt_functab definition in include/rt/functab.h
to see which primitives do not have various callbacks |
07:35.04 |
brlcad |
sanket_: did you have a more specific
question? |
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gabbar1947 |
brlcad: sounds good, thanks ! |
08:52.23 |
gabbar1947 |
Looking into the code, it seems that the
function HCROSS() is not yet implemented. Can I get the details
regarding the function. TIA: |
09:00.03 |
brlcad |
gabbar1947: if you have to ask, then it's not
an appropriate task for you -- that information is easily found by
searching the web |
09:00.47 |
brlcad |
heck, even just following the naming
conventions in vmath.h, it should be evident |
09:04.13 |
brlcad |
(and that's not intenteded to be a slight on
your abilities, you just want to pick something you can work rather
independently to demonstrate ability) |
09:28.44 |
gabbar1947 |
brlcad: my bad, I asked the question in a
wrong way. I'm aware of cross products, just wanted to confirm
whether it is the 4D vector cross product or I'm taking things in a
wrong way. |
09:29.04 |
brlcad |
ah, no worries |
09:29.09 |
brlcad |
yep, it's a 4d vector |
09:29.17 |
brlcad |
so you just have to homogenize it
first |
09:29.36 |
brlcad |
(probably) |
09:30.09 |
gabbar1947 |
oh yess! I'm aware, thanks |
09:31.29 |
brlcad |
some other options:
http://math.stackexchange.com/questions/720813/do-four-dimensional-vectors-have-a-cross-product-property |
09:31.30 |
gcibot |
[ linear algebra - Do four dimensional vectors
have a cross product property? - Mathematics Stack Exchange
] |
09:32.27 |
gabbar1947 |
all we need is the magnitude of the final
determinant , right ? |
09:34.09 |
brlcad |
if we assume they're really
3-dimensional |
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gabbar1947 |
brlcad: so i think, a separate case has to be
made if the 4th coordinate comes out to be zero as we can't
homogenize then |
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gabbar1947 |
I had a simple doubt , might be lame, but
where does 4D cross product come to use in brlcad. Because anyways
we have to assume it as a projection of a 3D vector and then
homogenize it. |
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