November 2000
- Walking Philip Loguinov, Draymoor
- MUD-Dev digest, Vol 1 #231 - 4 msgs Dr. Cat
- MUD-Dev digest, Vol 1 #231 - 4 msgs J C Lawrence
- MUD-Dev digest, Vol 1 #231 - 4 msgs Koster, Raph
- Atomic functions Felix A. Croes
- Atomic functions Ben
- Atomic functions Christopher Allen
- Atomic functions Ben
- Atomic functions Felix A. Croes
- Atomic functions KevinL
- Atomic functions Felix A. Croes
- Atomic functions KevinL
- Atomic functions KevinL
- Mud Dev FAQ part II Marian Griffith
- Walking Robert Zubek
- Opinions (even harsh) on Castle Marrach by Skotos? Christopher Allen
- Articles & Columns at Skotos Christopher Allen
- skotos David Zimet
- skotos Christopher Allen
- "An essay on d00dism and the MMORPG" Koster, Raph
- "An essay on d00dism and the MMORPG" Marian Griffith
- "An essay on d00dism and the MMORPG" birgit.schulte@philips.com
- "An essay on d00dism and the MMORPG" Norman Short
- "An essay on d00dism and the MMORPG" Jeff Freeman
- "An essay on d00dism and the MMORPG" gmiller@classic-games.com
- "An essay on d00dism and the MMORPG" Travis Casey
- "An essay on d00dism and the MMORPG" Lars Duening
- "An essay on d00dism and the MMORPG" Travis Casey
- "An essay on d00dism and the MMORPG" Lars Duening
- "An essay on d00dism and the MMORPG" Travis Casey
- "An essay on d00dism and the MMORPG" Lars Duening
- "An essay on d00dism and the MMORPG" Travis Casey
- "An essay on d00dism and the MMORPG" John Buehler
- "An essay on d00dism and the MMORPG" Vincent Archer
- "An essay on d00dism and the MMORPG" John Buehler
- "An essay on d00dism and the MMORPG" Paul Schwanz - Enterprise Services
- "An essay on d00dism and the MMORPG" John Buehler
- "An essay on d00dism and the MMORPG" Vincent Archer
- "An essay on d00dism and the MMORPG" Peter
- "An essay on d00dism and the MMORPG" John Buehler
- "An essay on d00dism and the MMORPG" Vincent Archer
- "An essay on d00dism and the MMORPG" Travis Casey
- "An essay on d00dism and the MMORPG" KevinL
- "An essay on d00dism and the MMORPG" John Buehler
- "An essay on d00dism and the MMORPG" KevinL
- "An essay on d00dism and the MMORPG" John Buehler
- "An essay on d00dism and the MMORPG" Xuri
- "An essay on d00dism and the MMORPG" John Buehler
- "An essay on d00dism and the MMORPG" KevinL
- "An essay on d00dism and the MMORPG" Rhys
- "An essay on d00dism and the MMORPG" Justin Rogers
- "An essay on d00dism and the MMORPG" Ted Milker
- "An essay on d00dism and the MMORPG" Steve {Bloo} Daniels
- "An essay on d00dism and the MMORPG" Zak Jarvis
- "An essay on d00dism and the MMORPG" Patrick Dughi
- "An essay on d00dism and the MMORPG" Travis Casey
- "An essay on d00dism and the MMORPG" Madrona Tree
- "An essay on d00dism and the MMORPG" Hans-Henrik Staerfeldt
- "An essay on d00dism and the MMORPG" Madrona Tree
- "An essay on d00dism and the MMORPG" Michael Tresca
- "An essay on d00dism and the MMORPG" Jeff Freeman
- "An essay on d00dism and the MMORPG" Jon Lambert
- "An essay on d00dism and the MMORPG" Travis Casey
- "An essay on d00dism and the MMORPG" |Eric|
- "An essay on d00dism and the MMORPG" Miroslav Silovic
- "An essay on d00dism and the MMORPG" John Buehler
- "An essay on d00dism and the MMORPG" Corey Crawford
- "An essay on d00dism and the MMORPG" ghovs@ghovs.moo.ca
- "An essay on d00dism and the MMORPG" Corey Crawford
- "An essay on d00dism and the MMORPG" Marian Griffith
- "An essay on d00dism and the MMORPG" Travis Casey
- "An essay on d00dism and the MMORPG" Richard Tew
- "An essay on d00dism and the MMORPG" Chris Gray
- "An essay on d00dism and the MMORPG" Steve {Bloo} Daniels
- "An essay on d00dism and the MMORPG" Richard Tew
- "An essay on d00dism and the MMORPG" msew
- "An essay on d00dism and the MMORPG" John Buehler
- "An essay on d00dism and the MMORPG" the_logos@www.achaea.com
- "An essay on d00dism and the MMORPG" geoffrey@yorku.ca
- "An essay on d00dism and the MMORPG" John Buehler
- "An essay on d00dism and the MMORPG" the_logos@www.achaea.com
- "An essay on d00dism and the MMORPG" Geoffrey@yorku.ca
- "An essay on d00dism and the MMORPG" Vincent Archer
- "An essay on d00dism and the MMORPG" Jason Belhumeur
- "An essay on d00dism and the MMORPG" Val Trullinger
- "An essay on d00dism and the MMORPG" Lee Sheldon
- "An essay on d00dism and the MMORPG" Travis Casey
- "An essay on d00dism and the MMORPG" Robert Zubek
- "An essay on d00dism and the MMORPG" Eric Rhea
- "An essay on d00dism and the MMORPG" Wells, Thomas
- "An essay on d00dism and the MMORPG" Travis Casey
- "An essay on d00dism and the MMORPG" Richard Tew
- "An essay on d00dism and the MMORPG" Koster, Raph
- "Virtual" What? Dave Rickey
- Object Models Ben
- Object Models J C Lawrence
- Object Models Dmitri Zagidulin
- Object Models KevinL
- Object Models Tony Wooster
- Object Models david.l.smith@home.com
- Object Models KevinL
- Object Models Gavin Doughtie
- Object Models John Robert Arras
- Object Models KevinL
- Object Models Bruce
- Object Models Ben Chambers
- Object Models Bruce
- Object Models KevinL
- Object Models Gavin Doughtie
- Object Models KevinL
- Object Models Travis Casey
- Object Models John Buehler
Travis Casey writes:
> Not being a software professional, I'm not sure what the distinction
> between "tight" and "loose" contracts is, so maybe I've only dealt
> with loose contracts. In the contract models I've seen, though, a
> contract only specifies what must be supplied and what must be done --
> it doesn't specify that an object can't have any other data or
> behaviors other than the contracted ones.
A contract, categorically, makes some statement about what a method must
accomplish. A contract can state pretty much anything, including the
statement that nothing more than what has been stated may be changed.
Normally, the latter statement is not made due to the design restrictions
that result.
A 'loose' contract might best be presented by the statement 'and then a
miracle happens'. It's just a statement that something happens, but you're
not being very specific about what happens. A 'tight' contract makes very
specific statements, such as certain parameters and component state changes
in carefully-defined ways. This can be very useful if you want to ensure
that the system that you're building has some kind of useful behavior. More
knowns, fewer unknowns.
Imagine the 'loose' contract in construction of a fastener as opposed to a
bolt, screw, rivet or rubber band. If you order 1000 fasteners from a
supplier, who knows what you'll get. The tighter contracts of bolt, etc,
are still pretty loose. Would you just order 1000 bolts? You still don't
know enough for your purposes. So you order certain length, shaft, thread,
etc bolts. That's a tight contract.
> Thus, changing what all a low-level component will do (e.g., to add a
> "temperature" variable and make the "sharpen me" behavior take it into
> account) doesn't mean that you'll necessarily have to change all the
> code that uses that component.
Loose contracts give you room to add behaviors, but it also limits the
things that the client of a contract can rely on. If you have a component
that has temperature and a component that doesn't, yet the 'sharpen'
contract makes no statement about the need for temperature information, you
may get some unusual behaviors that you don't want. For example, some
blades might sharpen more easily on a hot forge, while others will not.
This will be confusing to users. The value of tight contracts is knowing
what you have - and knowing when you're making changes. You have to
acknowledge the fact that you're changing the relationship between
components and to consider what impact that has on each element of your
design. Without it, you end up with screwy behaviors, which are bugs just
as much as a crash or having the wrong texture on a surface is a bug.
> The usual problem that I've run into with adding things like that in
> muds isn't updating objects that use those components -- it's going
> back and changing everything that's already finished that *should*
> have used those components.
One of the things that a solid set of component tools addresses. This was
what my research team was working on when I left. It was the last paper
that I wrote before leaving.
I'll skip over the various modelling issues. That's something that requires
a ton of investigation.
JB - Object Models Travis Casey
- Object Models John Buehler
- Object Models Chris Gray
- Object Models John Buehler
- Object Models Chris Gray
- Object Models olag@ifi.uio.no
- Object Models Miroslav Silovic
- Object Models Joe Andrieu
- Object Models John Buehler
- Object Models Miroslav Silovic
- Object Models Miroslav Silovic
- Object Models John Buehler
- Object Models Miroslav Silovic
- Object Models KevinL
- Object Models John Buehler
- Object Models Miroslav Silovic
- Object Models John Buehler
- Object Models Miroslav Silovic
- Object Models Bruce
- Object Models John Buehler
- Object Models Bruce
- Object Models John Buehler
- Object Models Phillip Lenhardt
- Object Models John Buehler
- Object Models olag@ifi.uio.no
- Object Models Travis Casey
- Object Models Miroslav Silovic
- Object Models John Buehler
- Object Models msew
- Object Models Russ Lewis
- Object Models John Buehler
- Object Models Phillip Lenhardt
- Object Models Travis Nixon
- Object Models John Buehler
- Object Models msew
- Object Models John Buehler
- Object Models Andy
- Object Models Christopher Allen
- Object Models Chris Gray
- Object Models Travis Casey
- Object Models Marc Bowden
- Object Models Miroslav Silovic
- Object Models John Buehler
- Object Models Miroslav Silovic
- Object Models John Buehler
- Object Models Bruce
- Object Models John Buehler
- ADMIN: Lost posts J C Lawrence
- Multiple Inheritance (was: Object Models) Bruce
- Fanfic (Or: Why we can't all get along) Brian 'Psychochild' Green
- Fanfic (Or: Why we can't all get along) John Buehler
- Participatory Content (was Opinions (even harsh) on Castle Marrach by Skotos?) Christopher Allen
- Object Models (OO 101) Gavin Doughtie
- Consistent Characters (Was Remote client connection) John W Pierce
- Consistent Characters (Was Remote client connection) Marian Griffith
- (no subject) John Buehler
- (no subject) Mordengaard
- (no subject) John Buehler
- (no subject) Marian Griffith
- (no subject) John Buehler
- (no subject) John Buehler
- (no subject) KevinL
- (no subject) John Buehler
- (no subject) Joe Andrieu
- (no subject) Bruce
- (no subject) John Buehler
- (no subject) KevinL
- (no subject) John Buehler
- (no subject) KevinL
- (no subject) Dan Merillat
- (no subject) John Buehler
- (no subject) Brian 'Psychochild' Green
- facist marketers / content controllers msew
- facist marketers / content controllers Dave Rickey
- And the lines blur between rl and games!!! msew
- "gossip" Josh Rollyson {dracus}
- Official announce of nevrax.org www site Vincent Archer
- Intersection of Fanfic & Participatory Content Christopher Allen
- A list of Content Creation Eric Rhea
- Refactoring (was Object Models) Gavin Doughtie
- PDA-esque devices used in gaming |Eric|
- Weather and Multiple Planets Greg Mitchell
- Weather and Multiple Planets rayzam
- Interesting EQ rant (very long quote) Brian 'Psychochild' Green
- Interesting EQ rant (very long quote) Vincent Archer
- Interesting EQ rant (very long quote) Lee Sheldon
- Interesting EQ rant (very long quote) Koster, Raph
- Interesting EQ rant (very long quote) rayzam
- Interesting EQ rant (very long quote) Travis Nixon
- Interesting EQ rant (very long quote) Matthew Mihaly
- Interesting EQ rant (very long quote) McQuaid, Brad
- Interesting EQ rant (very long quote) Travis Nixon
- Interesting EQ rant (very long quote) rayzam
- Interesting EQ rant (very long quote) Matthew Mihaly
- Interesting EQ rant (very long quote) Davian
- Interesting EQ rant (very long quote) Dave Rickey
- Interesting EQ rant (very long quote) Matthew Mihaly
- Interesting EQ rant (very long quote) Dave Rickey
- Interesting EQ rant (very long quote) Lee Sheldon
- Interesting EQ rant (very long quote) Lee Sheldon
- Interesting EQ rant (very long quote) McQuaid, Brad
- Interesting EQ rant (very long quote) Lee Sheldon
- Interesting EQ rant (very long quote) Madrona Tree
- Interesting EQ rant (very long quote) Lee Sheldon
- Interesting EQ rant (very long quote) msew
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) Phillip Lenhardt
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) Justin Hooper
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) Travis Nixon
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) Dave Rickey
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) J C Lawrence
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) Ananda Dawnsinger
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) Ananda Dawnsinger
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) Marian Griffith
- Interesting EQ rant (very long quote) Tamzen Cannoy
- Interesting EQ rant (very long quote) Timothy Dang
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) msew
- Interesting EQ rant (very long quote) Travis Nixon
- Interesting EQ rant (very long quote) Nathan F.Yospe
- Interesting EQ rant (very long quote) Phillip Lenhardt
- Interesting EQ rant (very long quote) Justin Hooper
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) Travis Casey
- Interesting EQ rant (very long quote) Justin Hooper
- Interesting EQ rant (very long quote) Travis Casey
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) Madrona Tree
- Interesting EQ rant (very long quote) Jeff Freeman
- Interesting EQ rant (very long quote) rayzam
- Interesting EQ rant (very long quote) Jeff Freeman
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) Koster, Raph
- Interesting EQ rant (very long quote) Jeff Freeman
- Interesting EQ rant (very long quote) Klyde Beattie
- Interesting EQ rant (very long quote) Travis Nixon
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) Hulbert, Leland
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) Vincent Archer
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) Vincent Archer
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) Jeff Freeman
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) Madrona Tree
- Interesting EQ rant (very long quote) Daniel.Harman@barclayscapital.com
- Interesting EQ rant (very long quote) Madrona Tree
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) Justin Hooper
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) Willowreed@aol.com
- Interesting EQ rant (very long quote) Willowreed@aol.com
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) J C Lawrence
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) msew
- Interesting EQ rant (very long quote) Dave Rickey
- Interesting EQ rant (very long quote) J C Lawrence
- Interesting EQ rant (very long quote) J C Lawrence
- Interesting EQ rant (very long quote) Zak Jarvis
- Interesting EQ rant (very long quote) Hulbert, Leland
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) Jeff Freeman
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) Jeff Freeman
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) J. Coleman
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) Travis Nixon
- Interesting EQ rant (very long quote) msew
- Interesting EQ rant (very long quote) Chris Lloyd
- Interesting EQ rant (very long quote) msew
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) Chris Lloyd
- Interesting EQ rant (very long quote) Travis Nixon
- Interesting EQ rant (very long quote) Marian Griffith
- Interesting EQ rant (very long quote) msew
- Interesting EQ rant (very long quote) Jon Lambert
- Interesting EQ rant (very long quote) Koster, Raph
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) Chris Lloyd
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) Daniel.Harman@barclayscapital.com
- Interesting EQ rant (very long quote) Dan Shiovitz
- Interesting EQ rant (very long quote) shren
- Interesting EQ rant (very long quote) Dave Rickey
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) shren
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) Travis Casey
- Interesting EQ rant (very long quote) the_logos@www.achaea.com
- Interesting EQ rant (very long quote) Travis Casey
- Interesting EQ rant (very long quote) Vincent Archer
- Interesting EQ rant (very long quote) twm139@its.to
- Interesting EQ rant (very long quote) Vincent Archer
- Interesting EQ rant (very long quote) Travis Nixon
- Interesting EQ rant (very long quote) Vincent Archer
- Interesting EQ rant (very long quote) Timothy Dang
- Interesting EQ rant (very long quote) Michael Tresca
- Interesting EQ rant (very long quote) Justin Hooper
- Interesting EQ rant (very long quote) Holly Sommer
- Interesting EQ rant (very long quote) Marian Griffith
- Interesting EQ rant (very long quote) msew
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) Travis Casey
- Interesting EQ rant (very long quote) Daniel.Harman@barclayscapital.com
- Interesting EQ rant (very long quote) Joe Andrieu
- Interesting EQ rant (very long quote) S. Patrick Gallaty
- Interesting EQ rant (very long quote) Daniel.Harman@barclayscapital.com
- Interesting EQ rant (very long quote) Brian 'Psychochild' Green
- Interesting EQ rant (very long quote) Zak Jarvis
- Interesting EQ rant (very long quote) John Vanderbeck
- Interesting EQ rant (very long quote) Matthew Mihaly
- Interesting EQ rant (very long quote) Vincent Archer
- Interesting EQ rant (very long quote) McQuaid, Brad
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) Brian 'Psychochild' Green
- Interesting EQ rant (very long quote) Vincent Archer
- Interesting EQ rant (very long quote) Richard Tew
- Interesting EQ rant (very long quote) Dave Rickey
- Interesting EQ rant (very long quote) J C Lawrence
- Interesting EQ rant (very long quote) John Buehler
- Interesting EQ rant (very long quote) Jon Lambert
- Dynamic Timelines Lord Ashon
- Dynamic Timelines |Eric|
- Dynamic Timelines Bruce
- Dynamic Timelines James Thomas
- Dynamic Timelines Travis Casey
- Neopets Matthew Mihaly
- Threads Ben Chambers
- Consistent Characters Jeremy Hovance
- Consistent Characters Travis Casey