code logs -> 2011 -> Sat, 22 Oct 2011< code.20111021.log - code.20111023.log >
--- Log opened Sat Oct 22 00:00:59 2011
00:50 You're now known as TheWatcher[T-2]
00:55
< Derakon>
Right, there's basic cube drawing, and it works, and now I can move on to more interesting problems.
00:55
< Derakon>
Thanks for the help, McM.
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13:56 * AnnoDomini looks at a job advert.
13:56
< AnnoDomini>
The job advert lists COBOL as a requirement.
14:12
< gnolam>
Ahh... legacy systems.
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14:52
< Simon_Sh1ne>
* Time travel experience
15:57 Simon_Sh1ne is now known as sshine
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18:15
< celmin|lunch>
Okay, so, I have no idea why scaling doesn't work.
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19:15
< celticminstrel>
I even print out the matrix just before multiplying, and it looks right.
19:17<~Vornicus> What's the row count on the matrix?
19:18
< celticminstrel>
4
19:18<~Vornicus> and 4 columns too?
19:18
< celticminstrel>
Yeah.
19:18<~Vornicus> [[2 0 0 0] [0 2 0 0] [0 0 2 0] [0 0 0 1]]
19:18<~Vornicus> That fourth column is itself a scaling
19:19
< celticminstrel>
I did wonder about that...
19:19
< celticminstrel>
But, should I omit the fourth row when I multiply by a scalar, or the fourth column, or both?
19:20<~Vornicus> 'yes'
19:20
< celticminstrel>
<_<
19:20<~Vornicus> the fourth column is generally used to translate stuff
19:20
< celticminstrel>
Yeah.
19:20<~Vornicus> and the fourth row is generally used when you're projecting
19:20<~Vornicus> (specifically you can use it as a perspective mangle)
19:21
< celticminstrel>
(There's a 1 in the 4th column, 1st row, and I have no idea how it got there, but I'm ignoring it because I don't think it'd make a difference.)
19:22
< celticminstrel>
Okay, scaling works, now for translating and rotating with respect to the world origin.
19:23
< celticminstrel>
Translating works but is respect to the model at the moment.
19:23
< celticminstrel>
Probably the same is true of rotating; I can't tell.
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19:28
< sshine>
are you implementing matrix operations?
19:31
< celticminstrel>
I think the idea is to pre-compose the transforms before passing it on to OpenGL. I dunno; I'm basically doing what the assignment tells me to. I think.
19:32
< celticminstrel>
I'm supposed to implement the matrix myself or something.
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19:46
< sshine>
is some kind of matrix type passed to OpenGL?
19:50
< celticminstrel>
Yeah.
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20:48 * Alek twitches.
20:52
< Alek>
http://pastie.org/private/nj4teiemdpu3bgxlbuuw
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--- Log closed Sun Oct 23 00:00:14 2011
code logs -> 2011 -> Sat, 22 Oct 2011< code.20111021.log - code.20111023.log >

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