Hi list,
Asking this question with no shame ^^;
This might be basic, but what is the difference between a force and a
velocity ?
Sorry for being half brained...
They are completely different concepts, in short:
Force = mass * acceleration
Acceleration = Velocity / time
Velocity = distance-traveled / time
Actually speed = distance-traveled/time, velocity is more like position /
time (it's a vector).
On Wed, Feb 13, 2013 at 11:13 AM, César Sáez cesa...@gmail.com wrote:
They are completely different concepts, in short:
Force = mass * acceleration
Acceleration = Velocity / time
Velocity =
Try to answer the question,
Force will be considering mass as F = m.a, where m is mass, and a is
acceleration.
While velocity doesn't consider mass.
Cheers,
On Wed, Feb 13, 2013 at 4:49 PM, olivier jeannel olivier.jean...@noos.frwrote:
Hi list,
Asking this question with no shame ^^;
This
Thank's César ! Now it's clear :)
Le 13/02/2013 11:13, César Sáez a écrit :
They are completely different concepts, in short:
Force = mass * acceleration
Acceleration = Velocity / time
Velocity = distance-traveled / time
It's actually incorrect more so than clear.
Distance traveled divided by time is not velocity. It's speed, a scalar
value.
Velocity has to do with the rate of change and is represented by a vector
providing direction, and it's magnitude representing speed. So while speed
is the simple speed an
Reading that after sending it (when else would one proof read?) I realize
it might come across as a bit aggressive with the opening comment.
My apologies to César if that's the case, it sure wasn't intended to be or
to discourage someone else away from contributing to the already rare
physics
Velocity is the speed and direction at which an object moves.
Force is something with a strength and a direction that causes acceleration
on the object and has an effect on its velocity.
Think about it like this:
You have some object, that is flying through space with a VELOCITY.
Maybe it is
Apologies, there are a couple of number typos in the first one.
Here is the corrected version:
Velocity is the speed and direction at which an object moves.
Force is something with a strength and a direction that causes acceleration
on the object and has an effect on its velocity.
Think about
Great Raff! I`m very interested!
I think it should very fundamental and not very feature specific. Like
rigging in general!
Looking foward to it!
- Juhani
On 13 February 2013 08:30, Raffaele Fragapane
raffsxsil...@googlemail.comwrote:
Heya all,
I'm currently fishing around for interest and
Sounds cool
On Feb 13, 2013 9:31 AM, Raffaele Fragapane raffsxsil...@googlemail.com
wrote:
Heya all,
I'm currently fishing around for interest and feedback on a potential
rigging (for animation) workshop.
The format and venue would be the same of my technical direction one,
CGSociety,
I will send our riggers for sure Raf!
N
From: softimage-boun...@listproc.autodesk.com
[mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Raffaele Fragapane
Sent: Wednesday, 13 February 2013 4:30 PM
To: softimage@listproc.autodesk.com
Subject: Interest/Opinions on a (possible) rigging
Sounds good. Are you using Softimage as the main tool?
2013/2/13 Nick Angus n...@altvfx.com
I will send our riggers for sure Raf!
** **
N
** **
*From:* softimage-boun...@listproc.autodesk.com [mailto:
softimage-boun...@listproc.autodesk.com] *On Behalf Of *Raffaele Fragapane
I would be for this workshop. definitely.
On Thu, Feb 14, 2013 at 12:05 AM, Emilio Hernandez emi...@e-roja.comwrote:
Sounds good. Are you using Softimage as the main tool?
Cool, I am double interested.
2013/2/13 Raffaele Fragapane raffsxsil...@googlemail.com
I would be for this workshop. definitely.
On Thu, Feb 14, 2013 at 12:05 AM, Emilio Hernandez emi...@e-roja.comwrote:
Sounds good. Are you using Softimage as the main tool?
--
Anyone here has used octane render within Softimage?
If so I will appreciate your comments and your point of view of Octane vs
other renders you have used.
And if you have used Arnold and Octane, which one you prefer.
I have the Octane experience only from the videos and the demo. It seems
to
I'll send one of my guys Raff if I don't do it myself as well! ;)
On Wed, Feb 13, 2013 at 1:50 PM, Emilio Hernandez emi...@e-roja.com wrote:
Cool, I am double interested.
2013/2/13 Raffaele Fragapane raffsxsil...@googlemail.com
I would be for this workshop. definitely.
On Thu, Feb 14,
yep, been playing with it the last few days and I'm really impressed by
the speed and quality of Octane.
But comparing both Arnold and Octane, all I can say is for most stuff
Arnold is still better suited and production proven, but Octane is a
nice addition. Some scenes I tested that took
Yes, very!
I've always looked with deep suspicion upon the dark arts of rigging. Would
be nice to have an insight to that world.
On Wed, Feb 13, 2013 at 6:30 AM, Raffaele Fragapane
raffsxsil...@googlemail.com wrote:
Heya all,
I'm currently fishing around for interest and feedback on a
mind sharing your system config? I'm debating what card to put in a box
for Octane
On Wed, Feb 13, 2013 at 9:57 AM, Toonafish ron...@toonafish.nl wrote:
yep, been playing with it the last few days and I'm really impressed by
the speed and quality of Octane.
But comparing both Arnold and
Hi all,
We are currently extending our Alembic tools in Softimage so that you
can modify all the paths globally to Alembic files in the operators
via a scripting interface. One nice feature would be to get a list of
map of qualified Softimage node names to Alembic paths. But I am
currently not
an I7 3930 with a Geforce GTX 960 with 2048 MB, but I'd go for more
memory on the card if possible.
On 2/13/2013 16:08, Ed Manning wrote:
mind sharing your system config? I'm debating what card to put in a
box for Octane
On Wed, Feb 13, 2013 at 9:57 AM, Toonafish ron...@toonafish.nl
If you have the time, can you explain the workflow with using both octane
and softimage without an interactive viewport in soft??
Thanks
On Wed, Feb 13, 2013 at 10:24 AM, Toonafish ron...@toonafish.nl wrote:
an I7 3930 with a Geforce GTX 960 with 2048 MB, but I'd go for more
memory on the
Just watch the video in this thread and install the addon:
http://render.otoy.com/forum/viewtopic.php?f=29t=24365
Make sure you also download and replace the dll that is mentioned later
on in the thread, and if your SI camera does not export correctly, try
changing the default units in the
SignatureI’m in.
From: Tim Crowson
Sent: Wednesday, February 13, 2013 10:01 AM
To: softimage@listproc.autodesk.com
Subject: Re: Interest/Opinions on a (possible) rigging workshop
Sounds awesome!
-Tim C.
On 2/13/2013 7:35 AM, Raffaele Fragapane wrote:
I would be for this workshop.
I'm in for advanced topics and maths. Raf's last workshop was awesome and
everyone on the list should jump on any offerings from Raf.
I'm partially biased having worked with Raf last year but I'll recommend
his workshops anyway. :P
Seriously take the workshop!
On Feb 13, 2013 10:58 AM, phil
Is the interactive window in softimage plugin available yet? Personally I
don't like switching between apps to see how the render is coming.
2013/2/13 Toonafish ron...@toonafish.nl
Just watch the video in this thread and install the addon:
Nope, this is the best there is for SI at the moment as far as I know.
- Ronald
On 2/13/2013 17:14, Emilio Hernandez wrote:
Is the interactive window in softimage plugin available yet?
Personally I don't like switching between apps to see how the render
is coming.
2013/2/13 Toonafish
There is some discussion and sample scenes and trees in this thread:
https://groups.google.com/forum/?fromgroups=#!searchin/xsi_list/particle$20clumping$20technique/xsi_list/aI0Y77t9H2c/discussion
Should be good for a head start.
gray
From: softimage-boun...@listproc.autodesk.com
Thanks Ronald. Too bad developers are only aiming at Maya and Max from AD
suite. I admire the job that independent developers are putting into
this. I think I'll pass until the viewport is integrated in Softimage.
Hope it will not take as long as V-ray...
Even that Maxwell for rendering uses
They are working on an integrated version for SI as well, donno when
it's going to be released but from the video previews things looks
promising so far : http://render.otoy.com/forum/viewtopic.php?f=29t=23700
- Ronald
On 2/13/2013 17:37, Emilio Hernandez wrote:
Thanks Ronald. Too bad
Well, I've been stumped! According to all the docs I've read when you apply
an Upvector to a Bone Chain it always points at it in the Y axis. However,
I'd like the Bone to bend in a different axis. Oh well, you might think,
will have to work around it somehow - at the every least I can have an
I'm also in for advanced topics and any math.
I'm not sure I'd sign up for just a fundamentals course.
On Wed, Feb 13, 2013 at 11:03 AM, Eric Thivierge ethivie...@gmail.comwrote:
I'm in for advanced topics and maths. Raf's last workshop was awesome and
everyone on the list should jump on
just to show off the speed ;-)
stopped after 10 minutes rendering:
https://dl.dropbox.com/u/4271217/octane_classroom_10min.png
On 2/13/2013 17:37, Emilio Hernandez wrote:
Thanks Ronald. Too bad developers are only aiming at Maya and Max
from AD suite. I admire the job that independent
Math is fundamental right? ; )
On 13 February 2013 20:25, Alan Fregtman alan.fregt...@gmail.com wrote:
I'm also in for advanced topics and any math.
I'm not sure I'd sign up for just a fundamentals course.
On Wed, Feb 13, 2013 at 11:03 AM, Eric Thivierge ethivie...@gmail.comwrote:
I'm in
My experience was that it took a lng time to reduce fine noise. It got
to the level you have fairly speedily but after that the curve really began
to flatten out. Maybe it was just my vanilla 500 series nvidia card was
too slow, not sure.
On Wed, Feb 13, 2013 at 10:41 AM, Toonafish
I would be interested, I can use a good refresher on XSI rigging, however
it would depend on the curriculum.
I would echo the sentiments for advanced topics and math.
Cheers!
On Wed, Feb 13, 2013 at 10:46 AM, Juhani Karlsson juhani.karls...@talvi.com
wrote:
Math is fundamental right? ; )
Octane is a very good renderer
I own 2 GTX 580 with 3Go RAM each with EVGA SR-2 motherboard
More card u have less time render you have the only bad thing is the
power consumption ...
I hope to use the integrated version soon :)
Phil
/
/
Le 13/02/2013 19:51, Simon van de Lagemaat a écrit :
I've solved that problem here with a separate plugin.
Related to past discussions, I usually set up my workgroup like this:
Workgroup
Application
Plugins
Commands
+1 for advanced topics, maths :)
What about the Bone Axis Offset ?
I set X to -90 and it seems to be like what you describe
Velocity = net displacement / time.
Force = Mass * Acceleration
NOTE: Speed and velocity are very different.
Speed is distance traveled over time (scalar)
Velocity is net displacement over time (vector)
Example: Running around a track in a stadium.
If you make a complete lap in 60
is that distinctions helpful here?
i mean we aren't just going to render the last frame of our particle going
around the track, we are going to render 1440 frames (24fps*60secs) and at
each frame the instantaneous velocity is going to have some direction and
magnitude.
On Wed, Feb 13, 2013 at
Yes it's important because there are many equations which rely on velocity as a
variable, not speed.
If you're computing a speed, you need to accumulate the distance travelled over
time. If you're computing a velocity, you're working with deltas.
In more explicit terms, if you're computing
Even then, we are not computing the
displacement between the first and the last frame only (which, of
course, will lead to the wrongful observation that no displacement
has taken place yielding zero velocity). In this case the
displacement at the last frame will
I think we get zero velocity only if we integrate it over elapsed time (
and it is not an instant vel which is used most of time I guess ),
otherwise speed = scalar magnitude (length) of velocity, and the velocity =
diff between the last and the prelast positions
i know velocity is a delta and i have used it many a time as part of an
equation which is variable.
while your distinction is accurate i was concerned it wasn't helping
olivier with that example which illustrates no displacement. i just dont
think it was an intuitive example of velocity. in your
If you have a problem with the definitions, talk to mathematicians and
physicists.
I only put out the information for clarity as confusing speed with velocity is
very common and there are times when it does indeed matter.
Matt
From: softimage-boun...@listproc.autodesk.com
I'm a big fan of sticking to definitions, but they normally need to be
presented in sets to the uninitiated, or they become confusing.
IE: if you decide to put forward an example sampled across 6.6 seconds
resulting in the case of no velocity despite much distance covered, the
concept of discrete
i have no problem with the definitions and i just thought you might
actually be causing more confusion with your example.
On Wed, Feb 13, 2013 at 1:32 PM, Matt Lind ml...@carbinestudios.com wrote:
If you have a problem with the definitions, talk to mathematicians and
physicists.
** **
I gave the same definition and example as was used when I learned it in physics
class all those years ago. I don't recall anybody having a problem with it
then.
Matt
From: softimage-boun...@listproc.autodesk.com
[mailto:softimage-boun...@listproc.autodesk.com] On Behalf Of Steven Caron
Let me make somethings very clear here
for the sake of discussion:
Here we have to define whether or not we are talking of
instantaneous velocity or simply velocity. As Raff touched the
topic of Calculus (and also in almost all cases of studying the
I think its other people who are blowing this out of proportion. After sending
my initial email on the subject, I encountered this one from Olivier which
precedes mine:
Thank's César ! Now it's clear :)
Le 13/02/2013 11:13, César Sáez a écrit :
They are completely different concepts,
... It was clearer before ... :DDD
Le 13/02/2013 23:17, Matt Lind a écrit :
I think its other people who are blowing this out of proportion.
After sending my initial email on the subject, I encountered this one
from Olivier which precedes mine:
Thank's César ! Now it's clear :)
Le
Nope Manny,
this is not what I suggested and I don't think that's what Peter is looking
for :D
Bone Axis Offset is right under the length of the bone
[image: Inline image 1]
On Thu, Feb 14, 2013 at 9:43 AM, olivier jeannel olivier.jean...@noos.fr
wrote:
... It was clearer before ... :DDD
physics.jpg
If you can provide the scene I can test in Maxwell in six Core i7 Extreme
to compare. Of course my guess is that Octane will beat it in time. But
at least is a good parameter. The other will be if someone with Arnold can
do the same.
please add...
http://cgmemes.blogspot.com/
On Wed, Feb 13, 2013 at 3:01 PM, Raffaele Fragapane
raffsxsil...@googlemail.com wrote:
Same here, math for TD/rigger application always good.
Sent from my iPad
On Feb 13, 2013, at 2:08 PM, Mitchell Lotierzo mitchlotie...@gmail.com wrote:
+1 for advanced topics, maths :)
Thanks everyboy for the replies, between here, some mails and twitter
(apologies if I don't reply to everyone individually) it seems there's
enough interest.
At this point it feels like I'll stick to the original idea of making it a
path from 101 to intermediate. Maths, as far as I'm concerned,
I don't have an account, please feel free to do so in my place. I googled
it though, didn't do all the post myself ;)
On Thu, Feb 14, 2013 at 10:24 AM, Steven Caron car...@gmail.com wrote:
please add...
http://cgmemes.blogspot.com/
On Wed, Feb 13, 2013 at 3:01 PM, Raffaele Fragapane
Sounds great! I’m interested, too.
Do you plan to cover ICE, since you said Softimage will be used as the main
tool, in this workshop?
What are the limitations with the gpu renderers? Last time I looked at
it, subdivision / displacement was unsupported, I assume that's changed
now?
On Feb 14, 2013 8:08 AM, Emilio Hernandez emi...@e-roja.com wrote:
If you can provide the scene I can test in Maxwell in six Core i7 Extreme
to
Yes.
I've used ICE successfully as a teaching tool, particularly for maths (w6
and w7 of the TD one were pure linear algerba and pre-calc done through
ICE), and intend to continue to do so.
Would also do a week at least on ICE rigging do's and don't's, and it'd
probably be useful for the basiscs
Here's the classroom scene I used. It's not mine, I think it was created
by Alex Sandri. I can do an Arnold test as well tomorrow, but I suspect
it will take muuucho longer to get this quality without a lot of optimizing.
https://dl.dropbox.com/u/4271217/Classroom_SI.rar
- Ronald
On
Cool! J
Thanks.
yep, Octane does not support subdivisions or displacements, also only
camera motion blur.
- Ronald
On 2/14/2013 1:01, James De Colling wrote:
What are the limitations with the gpu renderers? Last time I looked
at it, subdivision / displacement was unsupported, I assume that's
changed
+1
Em 13/02/2013 16:26, Alan Fregtman alan.fregt...@gmail.com escreveu:
I'm also in for advanced topics and any math.
I'm not sure I'd sign up for just a fundamentals course.
On Wed, Feb 13, 2013 at 11:03 AM, Eric Thivierge ethivie...@gmail.comwrote:
I'm in for advanced topics and maths.
He'll just subdivide everything ;-)
On Wed, Feb 13, 2013 at 4:31 PM, Toonafish ron...@toonafish.nl wrote:
yes, better start preparing for somehumiliation ! ;-)
- Ronald
On 2/14/2013 1:22, Gene Crucean wrote:
One down one to go. NEXT!!! aaarrghahrahgh!!!
...hehe. Ok I'll stop
Exactly. I'll just provide a scene that's 100% organic :)
And it was going to use 64GB of memory ;)
On Wed, Feb 13, 2013 at 4:40 PM, Simon van de Lagemaat
si...@theembassyvfx.com wrote:
He'll just subdivide everything ;-)
On Wed, Feb 13, 2013 at 4:31 PM, Toonafish ron...@toonafish.nl
Define the parameter value type as 'siDispatch' with default value of zero,
and set the argument type to siArgumentInputOutput (or whatever it's called).
Example:
oArguments.Add( my_map, siArgumentInputOutput, 0, siDispatch );
You might run into a few quirks depending on which language
excellent...think we are missing Monsieurs Vray and 3delight.. and I do
believe Mitsuba san is due to arrive into the fray very soon.. or is this a
GPU versus CPU duel only.. clearly some conditions have to be met. the
classroom scene, is this to be the Field of honour?
On 14 February 2013 00:49,
The example of running around on a track is wrong unless you're on a
stationary planet. Way to confuse Olivier, guys :(
Here's my stab: Definitions aside, velocity describes how something is
moving at an instant in time. Force, however, is more closely related to
how an object will accelerate
But is the ball propelled by an internal combustion engine, or is it victim
of the gravitational pull?
Because if it's the former I feel it's remiss of you to forget that cold
air is more compressible (or rather more easily pulled in larger
quantities) than hot air, and therefore results in a
There's nothing wrong with the running track example. You are overthinking the
problem. It's an introductory level illustration to clarify the difference
between speed (scalar) and velocity (vector), and is used in physics text books
believe it or not. If you do a google search on physics
Update...seems to have a lot to do with setting the refresh for the region
to manual. Going back to interactive seems to kick it back into gear.
This a bug?
On Wed, Feb 13, 2013 at 10:52 PM, Kris Rivel krisri...@gmail.com wrote:
I'm using 2013 SP1 and noticed that MR often just doesn't
Hi Kris,
Without the plugins and addon , do you have this refresh issue in 2013 SP1?
Thanks
Ivan
Email : ivan@nospam.autodesk.com
Please remove nospam from the email
On Thu, Feb 14, 2013 at 12:37 PM, Kris Rivel krisri...@gmail.com wrote:
Update...seems to have a lot to do with setting
Since this whole convo is about velocity, I feel the 1st What If is more
relevant:
http://what-if.xkcd.com/1/
Teaser: baseball, 90% speed of light and doom.
On Wed, Feb 13, 2013 at 11:08 PM, Xavier Lapointe
xl.mailingl...@gmail.comwrote:
http://what-if.xkcd.com/28/
Teaser: Physics, Steaks,
Added. ;)
On Wed, Feb 13, 2013 at 6:24 PM, Steven Caron car...@gmail.com wrote:
please add...
http://cgmemes.blogspot.com/
On Wed, Feb 13, 2013 at 3:01 PM, Raffaele Fragapane
raffsxsil...@googlemail.com wrote:
wow...
On Wed, Feb 13, 2013 at 10:39 PM, Alan Fregtman alan.fregt...@gmail.comwrote:
Added. ;)
On Wed, Feb 13, 2013 at 6:24 PM, Steven Caron car...@gmail.com wrote:
please add...
http://cgmemes.blogspot.com/
On Wed, Feb 13, 2013 at 3:01 PM, Raffaele Fragapane
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