Creating A Flying Pet: Lesson 2 Chat Log

 

Catfart Grayson: one second, Im going to make a copy of the chat so far and drop it in a notecard

onionpencil Musashi: excellent plan!

Catfart Grayson: hmm having a buit of trouble bear with me

Catfart Grayson: right, you should be able to bye the screen for 0 dollars now

Catfart Grayson: Ive put the transcript onto a card inside

Elle Pollack un-crashes, will stop using SL and the GIMP at the same time now

Catfart Grayson: lol

Xander Moe: lol

Catfart Grayson: how we doing?

Ariel Monde: heh, Gimp and SL at the same time User here

Iamnot Prefect: lol ya i have a gig of ram... and they get unhappy when i run them at the same time.. but no crashing

Rhiannon Chatnoir: good

onionpencil Musashi: ok

You: fine proceed

Arda Fauna is online

Catfart Grayson: right, anyone need a comfort break before I start again?

Hokuto Gorham: no

onionpencil Musashi: ok here

Morlee Moreau: luckily, my sl butt doesnt get sore

Xander Moe: mine does

Catfart Grayson: Ok, so how are ppl with Link messages?

Rhiannon Chatnoir: ok

Dr Tapioca: okay

Hokuto Gorham: un linked

Carrina Hathor: ok

Iamnot Prefect: ok

Xcaliber Zadoq: don't know

Ariel Monde: a quick review on it please? it was a while ago

neand Fleming: no clue

Azazel Czukor: sketchy but I'll figure it out

Xander Moe: uhh heh

Elle Pollack: Haven't tried to figure them out yet

Alan Kiesler: I understand the basics.

Xander Moe: no idea

Catfart Grayson: sorry lagged here a sec

You: i find one that works and copy paste it

Candide LeMay: http://secondlife.com/badgeo/wakka.php?wakka=HomePage is your friend

Catfart Grayson: SO link mesage are used to allow different scripts in the same object pass information

Dr Tapioca: lsl wiki

Catfart Grayson: they can be in different prims if you want

Catfart Grayson: for our pet, we are going to use a link message from the brain to the movement script

Catfart Grayson: telling it where to move to

Catfart Grayson: and one from the movement script to the brain, when it reaches the target

Catfart Grayson: As usual in LSL, there is a function to send a link message

Catfart Grayson: it takes four parameters

Catfart Grayson: num, str and id can contain whatever you want, as loing as its a integer, string and id whichis a bit limited

Catfart Grayson: and linkset determines where the link message will be sent

Catfart Grayson: linknum can have several different values

Catfart Grayson: do you want me to go through these?

Xcaliber Zadoq: yes, pls

Catfart Grayson: OK, the asumptio here is that we have an object comprising several linked prims

Catfart Grayson: if we set linknum to LINK_ROOT, then the message will only be sebnt to

Catfart Grayson: scripts that are actuall in the root prim of the object

Catfart Grayson: if its in a child prim, it wont get the message

Catfart Grayson: LINK_SET sends the lin mesage everywhere

Catfart Grayson: LINK_ALL_OTHERS sends the link message to all prims except the prim the script is in

Catfart Grayson: and LINK_ALL_CHILDREN sends the message to all prims except the root prim

Catfart Grayson: or, you can actually set it to the actual link number of the prim if you know it

Catfart Grayson: Happly, we will only ever be using one of these values, no need to remember them all

Hokuto Gorham: :)

Catfart Grayson: so jus to recap that

Catfart Grayson: we are going to use this function to send out a link message

Catfart Grayson: Linknum says where to send the data to

Catfart Grayson: and the data can be an integer in num, a string in str, and a key in ID

Catfart Grayson: Just a few thoughts here on what we want out of our link messages

Catfart Grayson: we want to be able to send several different items at the same time

Catfart Grayson: we want several different messages we want to send other data types besides string integers and keys

Catfart Grayson: sometimes we just want to send a simple stop message

Catfart Grayson: so our system must cater for quite a lot

Catfart Grayson: This is an example of one way we could design it

Catfart Grayson: If we put each script in a prim, and use Linknum

Catfart Grayson: we can send each message straight to the script that needs it and only that script

Catfart Grayson: but, sometimes we may want to send a message to two scripts, and what if we dot have a prim for every script?

Catfart Grayson: so not too good

Catfart Grayson: this way is better

Catfart Grayson: If we set Linknum to LINK_SET, every message goes to every script

Catfart Grayson: doesnt matter which prim the script is in

Catfart Grayson: we can then use the num variable to tell which message is which

Catfart Grayson: so num = 1 could be a move message

Iamnot Prefect: is there a performence impact using this vs direct messaging?

Catfart Grayson: num = 2 could be the stop mesage etc

Catfart Grayson: Iamnot, not that Ive noticed, but Im only firing off my scripts evey 0.5 seconds or so

Catfart Grayson: in theory more scripts are having to check

Catfart Grayson: each message to decide if it is a message for it or not

Gino Medici: is there a SL equivalent of enums for the numbers?

Catfart Grayson: but I dont think its a norticiable drop

Iamnot Prefect: ok i would think with low script count(less then say 10) prob not much diference

Catfart Grayson: enums?

Gino Medici: Labels for the numbers, rather than 1,2,3 etc.

Catfart Grayson: ah, no Im afraid not

Gino Medici: ok :(

Alan Kiesler: You can set those yourself, imnot, if worried about that.

Catfart Grayson: OK Im going to try and finish this bit of design and then leave it there for today

Xcaliber Zadoq: examples R helpful

Catfart Grayson: now this design is good, and probalby the usual way you will see link messages used

Catfart Grayson: but does suffer from one diadvantage

Catfart Grayson: if you try and combine scripts from different creators, you can have clashes

Catfart Grayson: If you have a movement system that uses 1 to represent a move

Catfart Grayson: and someone else has a combat system that uses 1 to represent a hit

onionpencil Musashi: oops

Catfart Grayson: if you try and combine them together you could have problems

Catfart Grayson: not very likly I'll admit, but I like to think ahead

Catfart Grayson: this is the system I use

Catfart Grayson: I set num to 150 everytime

Ariel Monde: and we will use this system for the rest of this class ?

Catfart Grayson: now I can filter out MY mesages from anyothers that are running

Catfart Grayson: Ariel yes

Catfart Grayson: if I mix my messages with someone lese, the chances of a clash are very reduced

Gino Medici: ah ok - thats more like enums :D

Catfart Grayson: plus, I can make my scripts open source, if someone elses scipt wants to

Catfart Grayson: send a message to one of my scripts, they know to use channel 150

Catfart Grayson: right, so we are using linknum as LINLK_SET all the time

Catfart Grayson: num is going to 150, or what ever number you choose for your scripts

Catfart Grayson: which means we are going to have to put all the data

Catfart Grayson: and the message type into the remaining data filed, which is a string

Catfart Grayson: Im ignoring the key field at the moment

Catfart Grayson: everyone happy?

Gino Medici: yep

Catfart Grayson: so thats what we need, and a quick browse trough the WIki

Catfart Grayson: brought this up

Catfart Grayson: a nice method of comapcting all our data into a string and

Catfart Grayson: decoding the other end

Catfart Grayson: Now Im going to leave it here

Catfart Grayson: Next time we will start going into the actual code

Catfart Grayson: we are going to use in our link messages

Rhiannon Chatnoir: will you be giving us the slides and notes for this second part as well

Catfart Grayson: and take a look at the design of the brain script

onionpencil Musashi: would be helpful if doable

Catfart Grayson: Rhiannon, Id prefer to leave that till the end

Rhiannon Chatnoir: and, when is the second session happening

Rhiannon Chatnoir: ok

Catfart Grayson: Next Sunday, same time same place

onionpencil Musashi: same bat time and channel i think ;)

Candide LeMay: don't forget your homework folks ;-)

Buwaya Edelbrock: Ok.

Catfart Grayson: lol

rocky Erato: lol

Dr Tapioca: my dog already ate mine

Catfart Grayson: Ok thanks agin for coming, I hope it was usuful a

Catfart Grayson: and I look forward to seeing you next week

onionpencil Musashi: thansk!

rocky Erato: thanks

Rhiannon Chatnoir: thank you

Hokuto Gorham: cool stuff

Gino Medici: Cool - Thanks Catfart. Looking firward to next week! :D

Azazel Czukor: thanks much Catfart that was awesome

Catfart Grayson: thankyou all. Oh if you havnt done so, pop over to Fujin to check out some of my other creations

Hokuto Gorham: sure

Morlee Moreau: where is that?

Dr Tapioca: lol

Elle Pollack: *snerk*

Rhiannon Chatnoir: check his profile

Catfart Grayson: whoops

Morlee Moreau: ok, thanxz

Catfart Grayson: whistles

Catfart Grayson: right, I must go thanks again for coming

Catfart Grayson: see you later

Ariel Monde: Catfart, i plan to teach some classes myself.. where do you get this blackboard object ?

Catfart Grayson: ariel, chase me later Il drop you a copy off

Zina LeMay: catfart, are you teaching a beginners course?

Iamnot Prefect: the URL for that page is http://secondlife.com/badgeo/wakka.php?wakka=ExampleArgumentMultiplexing for anyone that wants it

Catfart Grayson: whoops, just want to capture that chat log

Ariel Monde: okay... i hope to find the one that can read the notecard and snapshots/textures and use the scrolling feature.

Catfart Grayson: Zina, no try James Otis's clasess they are very good

Zina LeMay: thanks

onionpencil Musashi: yes they are

Candide LeMay: ok catfart i will teach Inventory 101 once i get the approval from Haney Linden

Catfart Grayson: gak I hate trying to copy from the history window

Candide LeMay points at ctrl-a ctrl-cAriel Monde:)

 

 

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