From: mvale…@esoterica.pt (Mario Francisco Valente)
Subject: Magic the Gathering
Date: 1996/01/29
Message-ID: #1/1
X-Deja-AN: 137073115
organization: Esoterica, Portugal
newsgroups: pt.jogos.estrategia
Yo:
Gostava de saber sa ha’ por ai pessoas interessadas ( menos tu Goncalo! :)
em jogar Magic the Gathering e/ou que saibam o que e’ e/ou que tenham
baralhos.
C U!
MV
—
Et in Arcadia Ego
From: mvale…@esoterica.pt (Mario Francisco Valente)
Subject: Re: TARIFAS SLIP/PP TELEPAC,SA…ESCLARECIMENTOS ADICIONAIS PRECISAM-SE
Date: 1996/01/29
Message-ID: #1/1
X-Deja-AN: 137072682
references:
followup-to: telepac.geral,pt.internet,pt.geral,soc.culture.portuguese
organization: Esoterica, Portugal
newsgroups: telepac.geral,pt.internet,pt.geral,soc.culture.portuguese
: In article ,
: ieste…@telepac.pt (iesteves) wrote:
: >PS. Logo que tenham a tal licenca seria bom falarmos sobre um peering
: >agreement entre aTelepac e a Esoterica entre outras coisas. Porque, ao
O licenciamento da Esoterica como STCF no ICP esta’ em decurso. Alias,
somos e fomos os unicos que voluntariamente ha’ 2 anos atras contactamos
o ICP para ter a licenca. Na altura nem sabiam o que era Internet. Era
bom que os varios “vendedores” de espaco WWW do mercado tambem obtivessem
a respectiva licenca de SVA….
Quanto ao peering: a Esoterica esta’ disponivel desde o inicio para
o fazer com qq outro ISP; alias foi um dos primeiros proponentes. Ficamos
com a ideia ( de uma reuniao tida na FCCN ) que a Telepac nao estava
interessada em fazer peering com ninguem…A Esoterica entretanto ja’
tem a sua linha para o PIX, faltando resolver alguns detalhes tecnicos
para que o peering com terceiros seja possivel.
Ainda em relacao ao licenciamento ICP: que eu saiba a Telepac tambem
nao esta’ licenciada, continuando apenas a fazer valer um decreto lei
que lhe concedia um prazo (indeterminado) para apresentar o pedido e
obter a licenca; esta situacao de exclusao era permitida por ser na altura
o operador publico de dados. Se estou errado corrija-me e peco desde ja’
desculpa.
: >contrario do que muitos julgam, nos nao detestamos a concorrencia
: >leal. Antes pelo contrario, pensamos que ha espaco para concorrermos e
Isto nao bate certo com a nossa experiencia e com algumas ocorrencias
recentes.
: Ainda bem, realmente a situacao actual entre a IP e a Telepac no PIX era
: um pouco ridicula para o esforco conjunto que o Pais deve realizar.
Exacto.
Cumprimentos.
— Mario Valente
—
Et in Arcadia Ego
From: mvale…@esoterica.pt (Mario Francisco Valente)
Subject: O uso do nome Internet
Date: 1995/12/04
Message-ID: #1/1
X-Deja-AN: 120873906
organization: Esoterica, Portugal
newsgroups: pt.internet
Yo:
Nao que a Esoterica nao tenha tentado o registo do nome Internet
Portugal :-). Nao. Tentamos. Foi-nos recusado. E’ uma estrategia
obvia. Mas como foi recusado nao o usamos.
Mas calculo que o mesmo tenha acontecido ‘a IP Global.
Agora vir a publico usar o IP como Internet Portugal, e’ que nao
acho bem. Nem etico. Nem bonito.
Pergunto-me o que acham os utilizadores e o que acham os responsaveis
de outros ISPs ( PUUG, RCCN, Comnexo, etc, etc ).
Mas ha’ mais: a Telepac tem a palavra Internet como marca registada.
E o registo foi aceite. Ninguem contesta ? Ninguem diz nada ? No’s
nao concerteza: nao nos queremos perder num buraco financeiro/legal.
Mas nao me parece bem….e falar ainda nao paga impostos.
C U!
Mario Valente
—
Et in Arcadia Ego
From: mvale…@esoterica.pt (Mario Francisco Valente)
Subject: Re: Octrees
Date: 1995/11/18
Message-ID: #1/1
X-Deja-AN: 119646778
references:
organization: Esoterica, Portugal
newsgroups: comp.graphics.algorithms,rec.games.programmer
John McCarthy (r…@jecalpha.ka.sub.org) wrote:
: : Space looks like: Tree looks like:
: : +——————-+ _____________
: : | Quad 1 | Quad 2 | / | | \
: Ok, we could do this, and I understand what an octree is. But what good is it?
: Why is it important to have only 1 vertex in a section, and how can this
: informtation be used for better/faster rendering/plotting/whatever?
OK, lets see if I remember my work on octrees :-)
As said before an octree is a data structure built to represent
reality. Now this “reality” is in fact a cube, enveloping your universe.
The octree root node represents this universe and has 8 children nodes.
Each node represents a 3D quarter of the cube ( you divide each dimension
of the cube in half, as represented in previous BUAG that I’m not going
to repat :-)
In turn each of these nodes has 8 chidlren representing its own subdivision
in 8 parts. You repeat this until you get to the pixel level ( until you’ve
subdivided cubes so much that their dimension [ you’ll have to keep track
of the universe dimension and the number of subdivisions ] is now the
dimension of a pixel [ you choose what a pixel represents, 1 milimeter or
1 km ] ).
What good is it ?
Well, if you render the octree you’ll only have to plot the REALLY
needed pixels. Lets suppose that in your universe there’s only a ship
in the left-backside-superior quadrant/octant. You eliminate 7/8 of
the space ( and volume of pixels ) you’ll have to render.
Furthermore, if this is done in the right way ( meaning, from front to
back and with some testing ) you can eliminate lots of other pixels because
they’re hidden pixels.
Also furthermore ( and this is the area where I’ve done some work )
you can use the recursive rendering process to introduce a fractal
process, thereby incorporating fractal textures into the process with
no loss of speed.
The need to have a vertex in each section means that when you reach
the pixel level subdividing cubes you have to be able to determine
if the pixel is a filled or not. Notice that starting in the upper
level cubes the state of a cube can be 1 of 3: empty ( a chunk that
you can ignore when rendering ), filled ( a chunk you can ignore
because at the pixel level all the pixels will fill this area ) or
crossed ( a cube you’ll have to subdivide to get finer “grain” ).
Let me just add ( to finish the rather long post ) that I used
octrees in my work together with a different form of representing
objects: no CSG, vertex lists, etc; I used hyperplanes ( read geometric
mathematical definitions of surfaces ) to define obejcts; a cube for
example is defined by the intersection of 6 hyperplanes;; the advantage
of this is that you get the normal for each pixel easily ( its in the
plane’s equation ) thereby being able to do lighting easily, without
any convoluted calculations.
Thats it. Hope I was able to put it through.
C U!
Mario Valente
—
Et in Arcadia Ego
From: mvale…@draco.lnec.pt ()
Subject: HELP: PPP Leased Line Netblazer
Date: 1995/08/24
Message-ID: #1/1
X-Deja-AN: 108770337
distribution: world
organization: Laboratorio Nacional de Engenharia Civil
newsgroups: comp.os.linux.networking
Yo
We’re having problems connecting a Linux machine to the Internet.
We have a Linux machine ( 1.2.11 ) with PPP 2.1.2a connected to
a Motorola Codex 3266. This in turn is connected to a 4 wire leased
line which has on the other end a similar modem connected to a
Netblazer router.
We’re unable to get PPP to connect. LCP requests are sent continuously,
all with the same ID, but we get no response from the other side ( though
we can see the packets coming in on the modem RX light ).
We’d like to hear from people with same/similar experiences.
This is particularly mindboggling taking into account that we DID
get PPP to work ( same machine, same kernel, same PPP version, same
modem and leased line ) but we had another Linux machine on the other
end.
Any hints welcome.
Thanks in advance.
C U!
Mario Valente
—
‘Twas brillig, and the slithy toves, Did gyre and gimble in the wabe:
All mimsy were the borogoves, And the mome raths outgrabe.
Et in Arcadia Ego
mailto:mvale…@lnec.pt http://leo.lnec.pt/~mvalente/
