@everybody Rasher has added an explanation to his profile now.

"Mike Richter has it right - for me it's no longer fun nor interesting when the correlation between "rep" and reality goes negative."

@halirutan looks good...thanks!!

Excuse me....anybody help me to solve rotation algorithm please? mathematica.stackexchange.com/questions/80750/…

@HendryTanaka Seems like this isn't the right group for that question. This groups is for the Mathematica computation environment by Wolfram Research.

Um...sorry...I'm so sorry

@HendryTanaka The C language folks hang out on stackoverflow.com, and they might be able to help. Or there are computer graphics people at gamedev.stackexchange.com

@sblom I hope somebody may help me here. But...hey...thanks by the way

@Mr.Wizard it seems there is an explanation posted now. :-/

What's the best way to extract a particular number from a large chunk of text? I've got some formatted text returned from a program via stdout, and there's a line in it with the number I want. Currently I'm doing this:

StringCases[stdout, "Total lattice energy" ~~ __ ~~ "eV"];

First@Flatten@StringCases[%, x : NumberString :> ToExpression[x]]

which gives me "{"Total lattice energy = -1072.49430231 eV"}" on the first line

and then I'm taking the number from that, i.e. -1072.49

how can I do that in a single line, rather than using two StringCases?

(I've not really worked with strings in any depth before)

@blochwave How about

s = "Total lattice energy=-1072.49430231 eV. I have 3 cats, 2 dogs, and 2.4 children";
ToExpression@StringCases[s, NumberString]

What if the number is not "-1072.49430231"?

for example, the "Total lattice energy" and "eV" parts are constant

but I want to extract the number in between which will change depending on the simulation

(Im not actually near a computer with MMA so apologies if your example does exactly that...)

@blochwave Just create a regexp, that narrows it down as much as possible and use StringReplace:

s="Total lattice energy=-1072.49430231 eV. I have 3 cats, 2 dogs, and 2.4 children";
ToExpression[StringReplace[s,StartOfLine~~__~~"energy="~~n__~~" eV"~~___:>n]]

@halirutan Amazing thank you!

@blochwave Be aware that you cannot simply write ToExpression[n] inside StringReplace. For more information look at the details section in the StringReplace documentation.

Hi all, I have some Graphics3D that render fine on my desktop, which has a decent video card, but crashes my laptop, which is just an integrated graphics chip. I was thinking maybe I could use a different renderer on the laptop, which might be a lot slower but at least wouldn't crash? Anyone have experience with this?

I've tried both the "BSPTree" and "Software" options, both lead to crashes.

@Guillochon Raspberry Pi is proof that you can render Graphics3D on cheap graphic cards, however slowly. I wonder if this is really your problem.

@Pickett If what is really my problem?

I also disabled anti-aliasing in the options to see if that helps, it doesn't seem to.

OK, "HardwareDepthBuffer" works, but not "HardwareDepthPeeling"!

So that's the setting I'll have to use on the laptop I suppose

@Guillochon I don't know what your problem is exactly, but I'm just saying that one has to keep an open mind as to what the problem can be. I never figured out why MMA9 crashes frequently when I was using ListAnimate, for example, but it wasn't because of weak hardware.

@Pickett The point was that I'm using the same notebook on the desktop, and that doesn't crash

@Pickett I literally do a DumpSave on the desktop, load that in, then run the rendering function, lead to a crash on the laptop but not the desktop

It does appear that "HardwareDepthBuffer" works, but the results aren't as pretty as the default renderer. For me that's OK because I just want a quick glance on the laptop, but it's still a bit unfortunate that it crashes.

An open note to those who flagged this post for attention:

I apologize for dismissing your flags. I think I misread either the question or the answer that day as now it seems apparent to me that this is not an answer to the question that was asked.