a b c
Is the same as (a+b+c) • !(a•b) • !(a•c) • !(b•c) (If this is wrong, then ignore me)
While, ( a b ) c
Is the same as [((a+b) • !(a•b)) + c)] • ![((a+b) • !(a•b)) • c]
I'm not sure that helped, but the point is that (a+b+c) • !(a•b) • !(a•c) • !(b•c) is not true as soon as you have 3 inputs. You can see that from all of the not, AND conditions. As soon as one of those is false, the whole thing kerplodes.
The second one does allow three inputs, but the first one does not... They are not quite the same.
Dangit, I hate it when you are right. XOR is indeed associative (upon some research). You win again...
Results 21 to 40 of 83
Thread: Logic Blog - updated 2011/02/06
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- Jun 2009
- Blog Entries
That's weird, I'm the complete opposite. I love it when I'm right
If it makes you feel better, I can never remember the words like associative
Edit: Just to confirm, there will be no logic blog this week (23rd), blame water, christmas and grant for getting me all excited about doing other stuff. Also it's gonna be another big'un (c. 3k words again, so it takes a little while, like). Normal service will resume next week
Last edited by rtm223; 12-22-2009 at 08:06 PM.
01-19-2010 #23-- ? --
About time! Leaving us starving for so long...tsk.
Yeah I know Between losing almost the entire thing when I'd nearly completed it the first time, various real-world issues and generally not feeling like rewriting it all, it's taken quite a while to get this together. I make a lot of effort to be less tardy in future!!-- ? --
No worries, at least you produce something worthwhile once in a while, which is more than some of us can say...
Well, I just wrote this as a comment on the last blog, but I figure it makes sense to post it here as well.
Originally Posted by rtm223;bt2427-- ? --
- Join Date
- Sep 2008
Gee, I recently discovered how to subscribe to blogs, but how do I test I did it right...?
I wouldn't advise sitting next to your email inbox waiting.... Not unless you have a LOT of snacks. Logic blog will be returning as soon as possible, but I'm giving no guarantees on when that will be.
Worst case I'll just knock together some explanations of some unique logic pieces I have knocking around that would allow me to talk about some interesting concepts.-- ? --
Logic Blog returns!
Although today, I'm not entirely sure if anything in there counts as logic, and also it 100% not what I told you was going to be next, but meh, deal with it. Actually what happened was, the next blog was supposed to be that worked example, but seeing as I kept you all waiting so long it didn't seem right to publish a worked example that had no new techniques in it. So I've gone off on a tangent and today we look at basic
Emitter Blocking Theory, and applications thereof.-- ? --
Is this a level too?
I specifically wasn't creating levels alongside this as the intent was to teach people techniques, rather than produce one-off application-specific devices.
As logic blog 2.0 kicks off, this may well change as I think there are a lot of things where the techniques are going to be better demonstrated by example
And on that subject, I'm wondering what exactly I should do about logic blog 2.0? It makes sense to begin during the beta I think, but I'm unsure whether it's going to make sense to publish it hidden away in the beta section of the site, or continue it in the blog area, as before, even though some people aren't in the beta.
Anyone not in the beta got any thoughts on this??-- ? --
I'm not in beta and in my opinion you should post them to blog area. I want to know much as possible about lbp2 to compensate my betalessness.
I agree with waD_Delma. I am not in the beta and would very much like to see them.
On a similar note I am curious if you have published anything regarding the score modifier activating objects and conditions in a linked level?
OK, I'm gonna kick this off again soonish, although bear in mind that even a couple of weeks into the beta I'm not planning on doing a beginner's guide to LBP2 logic. Sure I could cover the little bits and pieces like how to make a perm or a set-reset and crap like that, but that's all common knowledge (or will be for anyone who spends more than a day with the game) and... it's not very interesting. So I'll stick to some topics that are a little less than obvious and continue with the mission plan of pushing back the boundaries of what is possible.
On the other hand, I'll probably start producing bits and pieces to throw out into the community that are somewhat simpler and example applications - something that I avoided previously.
I'm also looking for the following:
1. A catalogue of the new switches in LBP2, basically images all of the sensors and logic devices.
2. Some kind of software for putting together graphs very quickly - I'm currently using excel, but the truth is it's quite faffy to actuall yget all the maths correct to produce a graph, when all I really need is a sketch.
So if anyone can help me with those then that'd be great.
WRT the score sensor, I will do at some point. At the moment upsilandre has his published in the beta with prizes and it's a much easier method to understand than mine.-- ? --
Shameless bump, I managed to power through this first instalment of Logic Blog 2, and what a beastie it is - huge wall of text awaits those brave enough here.
It's over 4000 words longs, so Id advise you to take it in stages, section 2 can be skipped initially (though it's probably well worth reading at some point), and realistically each of the sections is a logical stopping point if you need a break. It probably needs an extra proof read, but I don't feel like doing it right now, so I apologise for errors.
As ever, comments, feedback and questions in the thread or in the blog, please-- ? --
- Join Date
- Sep 2009
- Michigan, USA
- Blog Entries
Thank you, Mr. rtm. I will look at it right now!
EDIT: Way longer than I expected...
Last edited by piggabling; 10-05-2010 at 09:26 PM.
Originally Posted by rtm223My Levels
• Garden of Goodies
• How To Avoid Distorted Avatars And Level Patches When Using Custom Stickers
• How To Cheat The Thermo
• How To Seriously Cheat The Thermo
• How To Recreate The 3D Layer Glitch
• How To Recreate The Walkthrough Materials Glitch (Post-Leerdammer)
In this case aya, I consider the "digital" signals to be tri-state (0, 1 or -1), hence me saying that they aren't really digital. In actual fact I have a feeling there is a difference between a true binary signal and a tri-state signal (wrt to the meaning of zero in directional signals), but I'm not 100% atm and I'm certainly not sure which components output bi and which output tri, if that is indeed how it works. Either way they fit very closely into the same processing model, which is very different to the analogue. Certainly close enough that whilst my primary focus for the logic blog is analogue processing, I will be lumping them into the "other" category.
So the the selector and the counter increment inputs do not respond to the analogue components of the signal - they respond to the binary / tri-state / digital signal.
Last edited by rtm223; 10-06-2010 at 12:11 AM.-- ? --