Nabble - Croquet - Dev

Re: trying to use Croquet for a new language learning project

2008-07-24T12:04:19Z

On Thu, Jul 24, 2008 at 1:19 PM, Peter Moore <pmoore@...> wrote:
> - TPainter is cool ... can we load an image (or edit a JPG that we dragged
> into the world)?
CCPainter actually does allow for the loading of existing images...
Here is what David Faught has sent me in the past for replacing
TPainter with CCPainter.
http://www.nabble.com/CCPainter-to13039374.html#a13039374 .. and
others that may help -
http://www.nabble.com/forum/Search.jtp?query=CCPainter&local=y&page=0&forum=14182

It works very nice.

rich
-

Re: trying to use Croquet for a new language learning project

2008-07-24T11:19:23Z

- TPainter is cool ... can we load an image (or edit a JPG that we dragged into the world)?

Is this a feature of David Faught's CCPainter? David?

Peter B. Moore

Academic Computing - Office of Information Technology

University of Minnesota

pmoore@...

trying to use Croquet for a new language learning project

2008-07-24T10:46:37Z

I run a small company that is in the middle of a new project to create
software tools to help kids age 6-9 learn a second language. I
realize that Croquet is pre-alpha, so problems are to be expected.
Still, I hope the base is solid enough that we can create some great
demos.

I hired a summer intern who has been learning Squeak and going through
all the Croquet tutorials, but we are stuck on several issues. Dan
has outlined them here: http://vcosm.com/croquet/

Some help would be greatly appreciated. In return, we're happy to
write up the details of what we learn, e.g. turning our questions into
mini tutorials and sharing general-purpose code.

Briefly:

- if we start from an existing world and make a few changes, how do we
save them? Here's the exact steps we tried; http://vcosm.com/croquet/ChangeExistingWorld.html

- what's the best way to create a new empty world? We tried invoking
BaseWorld from Squeak: http://vcosm.com/croquet/CreateEmptyWorld.html

- after we drag a JPG into a world, how can we turn it into a static
object (without the manipulation frame)? How can we save it in the
world? http://vcosm.com/croquet/AddAPicture.html

- TPainter is cool ... can we load an image (or edit a JPG that we
dragged into the world)? Where in the source code should we look to
try to enhance the 2D-to-3D conversion? (which is a nifty feature
BTW). http://vcosm.com/croquet/UseTPainter.html

Help on these issues would be a great start, though we have a few
misc. questions here: http://vcosm.com/croquet/OtherQuestions.html

Thanks in advance,

Scott

Re: Questions about Tweak and UI

2008-07-24T08:07:57Z

I am back to solving problem 3 now, it was left alone for a while but becoming a crucial part now as the tree menu is used oftenly.

My problem is after clicking the tree view menu, the keyboardFocus is set to the tree and all key events will not be forwarded to the harness anymore. There is a releaseKeyboardFocus method in CTreeWidgetCostume which gets called in the method onMouseLeave but it just seems to release the focus. How do I set the keyboard focus back to the harness so that key events can be forwarded to the harness again?

Andreas Raab wrote:

Hi -

Phua Khai Fong wrote:
> 1) What is the meaning of the angle brackets '<' and '>' and when should
> it be used? I see it is mainly used to keep a method aware of an event
> but I'm not really sure bout that.

They should only be used for adding event triggers as in:

onMouseDown
<on: mouseDown>

onButtonFire
<on: fire in: button>

onClockTick
<ticking: 5>

> 2)Where can I get a full list of the Tweak syntax and more information
> about it?I have browsed the treakproject.org site but its not really
> complete. I hope to get more examples and tutorials (besides the bank
> account tutorial).

Unfortunately, there are currently no other tutorials (and I'm not in a
position to write more). As far as syntax goes, besides the annotations
the only other change is that Tweak allows "remote assignments" for
clarity, e.g.,

circle color := Color black.

(which gets transformed into a #color: message). For syntax, that's it.
Tweak uses some of the annotations internally (like the #bewareOf:
annotations) and you don't have to worry about these at all. The only
annotations that matter are the event triggers.

> 3)I created a tree menu at the side using CTreeWidget. The problem is
> after I click on the tree menu, it steals the keyboard focus and the
> world doesn't respond to key events anymore ( it still responds to the
> mouse though). All key events are focused on the tree menu. How do I fix
> this problem?

Not sure what you're trying to achieve but maybe you can just set the
keyboard focus to whatever you'd like after the mouse up event?

Cheers,
- Andreas

Re: Re: [ANN] first version of CroquetGIS

2008-07-23T08:53:03Z

Hi Serge,

I have seen your mention to a project about observation robots for GIS
applications.

I have been involved in something similar in a project for pollution control
at Università Cattolica di Brescia, where we plan to use an approach based
on neuro fuzzy technology based on a framework (FuzzyWorld) which I
developped in Smalltalk and that I was thinking to port to Squeak.

Can you give me some further details about your project ?

Maybe we could find some synergies

Thanks

Ciao

Lorenzo
----- Original Message -----
From: "Serge Stinckwich" <Serge.Stinckwich@...>
To: "Baveco, Hans" <Hans.Baveco@...>
Cc: <croquet-dev@...>
Sent: Tuesday, July 22, 2008 3:20 PM
Subject: Re: [croquet-dev] Re: [ANN] first version of CroquetGIS

Thank you Hans for your explanation. I will soon be part of a project
merging a GIS system with observation robots deployed on a disaster
zone.
I will have a look at your work and talk with you latter if necessary.

2008/7/10 Baveco, Hans <Hans.Baveco@...>:

> The project has two goals, one is to in general enable the use of
> geographic data in on-line multi-user virtual worlds like Croquet. These
> data might be useful for the creation of the landscape, e.g. using digital
> elevation data and textures derived from landuse maps etc or just to allow
> the use of this data in the application itself (image the avatars
> discussing and editing maps projected on the wall, like in QWAQ is
> possible for other document types) - this latter boils down to the
> development of a simple on-line multi-user GIS. A second goal is to allow
> my simulation models to "live" in virtual worlds like Croquet, with the
> main focus on visualization of (spatial) model output and maybe the
> exploration of different ways of user-interaction with the models.
>
> Hans
> ________________________________
>
> From: news on behalf of Serge Stinckwich
> Sent: Thu 7/10/2008 11:22 AM
> To: croquet-dev@...
> Subject: [croquet-dev] Re: [ANN] first version of CroquetGIS
>
>
>
> Baveco, Hans a écrit :
>> On http://croquet-src-01.oit.duke.edu:8886/@siaEegaAzLgxZmBP/UCEIcAOK you
>> find a first version of CroquetGIS, a package that adds the ability to
>> import and visualize geographic data sets, in the formats ASCIIGRID, ESRI
>> Shapefile, ARC\INFO TINS and geo-referenced Images. More installation
>> details on the wiki (I haven't found a reliable way to load the required
>> packages automatically...). Sample data are at
>> http://webdocs.alterra.wur.nl/internet/landschap/EMM/Croquet/GIS/geo.zip
>>
>> It should basically work in the Cobalt release. When loading your own
>> datasets it is advisable to set the checkbox for "aligning to Croquet's
>> origin" - otherwise your visualization may end up very very far from
>> where your avatar is waiting! The alternative, for instance when you have
>> multiple datasets for the same area, is to make the Croquet origin
>> represent non-zero coordinates (e.g. the coordinates of the upperleft
>> corner of your map) - this is the first option in the GIS menu. (the
>> scaling is not done quite right yet for non-aligned datasets).
>> Currently, only a visualization is created of the geographic data. The
>> raw data sets can however be stored and used for other purposes than
>> visualization.
>> Comments, improvements and extensions are more than welcome,
>
> I'm interested, what are the goals of this project ?
>
> --
> Serge Stinckwich
> http://blog.doesnotunderstand.org/
>
>
>
>
>
>

--
Serge Stinckwich
Smalltalkers do: [:it | All with: Class, (And love: it)]
http://blog.doesnotunderstand.org/

Re: 3D model importers

2008-07-22T16:55:55Z

Our kids use CBModel Pro .. export as .obj from CBModel Pro ....
Import from file into Cobalt -> select mesh -> find your .obj file ->
select OK

Video that may help --> http://www.youtube.com/watch?v=VXGLo_P48LM

Will work with Cobalt if that is what you are using ->
http://www.opencroquet.org/index.php/Cobalt

=========

On Tue, Jul 22, 2008 at 6:44 PM, <tb@...> wrote:
> Hey Sjaak!
>
> You wrote:
>> I was hoping i could get some help/tips on
>> how to get a working .obj / .vrml file
>> 3dmodel importer for croquet.

3D model importers

2008-07-22T16:44:55Z

Hey Sjaak!

You wrote:
> I was hoping i could get some help/tips on
> how to get a working .obj / .vrml file
> 3dmodel importer for croquet.

There is a working version of a VRML-Importer in the "hedgehog" monticello
respository. If your models are of VRML without PROTOs, sensors and scripts,
then chances are good to see them inside a Croquet world :)

If you like to load VRML models into "Cobalt", then there is a modificated
version of "CroquetMenuWorld->actionImport" in the Mantis bug tracker, which
let's you load VRML models with Cobalt's menu option "Things/Load from file..."

I had some nice results with coloured "materials", but couldn't get textures to
load.

Cheers...
Thomas Braun

acquiring reference to TSpace in which a squeaklet is embedded

2008-07-22T08:45:22Z

Hello all,

I have created a squeaklet which I import into the "MPEG Demo (Master)" world.
I would like to have the squeaklet's processing take into account the state of
the world in which it's embedded (particularly information about avatars that
may enter the world). My initial research suggests that I need a reference to
the world's TSpace object - how can I obtain this?

If I'm going about this the wrong way, other suggestions are very welcome!

Thanks for any thoughts.

cheers,

RHH

Re: Re: [ANN] first version of CroquetGIS

2008-07-22T06:20:20Z

Thank you Hans for your explanation. I will soon be part of a project
merging a GIS system with observation robots deployed on a disaster
zone.
I will have a look at your work and talk with you latter if necessary.

2008/7/10 Baveco, Hans <Hans.Baveco@...>:

> The project has two goals, one is to in general enable the use of geographic data in on-line multi-user virtual worlds like Croquet. These data might be useful for the creation of the landscape, e.g. using digital elevation data and textures derived from landuse maps etc or just to allow the use of this data in the application itself (image the avatars discussing and editing maps projected on the wall, like in QWAQ is possible for other document types) - this latter boils down to the development of a simple on-line multi-user GIS. A second goal is to allow my simulation models to "live" in virtual worlds like Croquet, with the main focus on visualization of (spatial) model output and maybe the exploration of different ways of user-interaction with the models.
>
> Hans
> ________________________________
>
> From: news on behalf of Serge Stinckwich
> Sent: Thu 7/10/2008 11:22 AM
> To: croquet-dev@...
> Subject: [croquet-dev] Re: [ANN] first version of CroquetGIS
>
>
>
> Baveco, Hans a écrit :
>> On http://croquet-src-01.oit.duke.edu:8886/@siaEegaAzLgxZmBP/UCEIcAOK you find a first version of CroquetGIS, a package that adds the ability to import and visualize geographic data sets, in the formats ASCIIGRID, ESRI Shapefile, ARC\INFO TINS and geo-referenced Images. More installation details on the wiki (I haven't found a reliable way to load the required packages automatically...). Sample data are at http://webdocs.alterra.wur.nl/internet/landschap/EMM/Croquet/GIS/geo.zip
>>
>> It should basically work in the Cobalt release. When loading your own datasets it is advisable to set the checkbox for "aligning to Croquet's origin" - otherwise your visualization may end up very very far from where your avatar is waiting! The alternative, for instance when you have multiple datasets for the same area, is to make the Croquet origin represent non-zero coordinates (e.g. the coordinates of the upperleft corner of your map) - this is the first option in the GIS menu. (the scaling is not done quite right yet for non-aligned datasets).
>> Currently, only a visualization is created of the geographic data. The raw data sets can however be stored and used for other purposes than visualization.
>> Comments, improvements and extensions are more than welcome,
>
> I'm interested, what are the goals of this project ?
>
> --
> Serge Stinckwich
> http://blog.doesnotunderstand.org/
>
>
>
>
>
>

--
Serge Stinckwich
Smalltalkers do: [:it | All with: Class, (And love: it)]
http://blog.doesnotunderstand.org/

3D model importers

2008-07-22T02:31:21Z

Dear Croquet developers,

I am a student at the University of Leiden and i am working on my bachelor
project. My idea was to implement an existing image/3dmodel bio-informatics
database in croquet, where several users can 'walk through' the database and
can look at the images and models that are in it, discuss, annotate and do
whatever with it.

Ive come quite far now with the implementation, however, im having difficulties
with loading 3d models into the croquet world. There is an example tutorial on
www.opencroquet.org where some .obj files are imported (they are accompanied by
.mtl files) which works fine (SanMinimum Island). But when i tried to import
some random .obj files from the internet the system hangs :(

I was hoping i could get some help/tips on how to get a working .obj / .vrml
file 3dmodel importer for croquet.

Yours sincerely,

Sjaak Wolff
(sjaakwolff@...)

help with messages passing

2008-07-21T11:38:14Z

Hi everybody:

I'm new on the croquet plataform, in a project I need to translate an object in this way:

first I click an object from a collection of objects in the world, and after I click over an object in another area, so, the object that I need to move it's the object that I clicking before.

thanks for your time.

Re: error with code > 1 Kb

2008-07-21T10:01:50Z

Rafael Rojano wrote:
> But, I don't get very clear why does exist this limitation. Do you know
> if there is any document where I could read about this limitation?

I'm not sure about all the reasons but one limit that comes to mind is
the conditional jump bytecodes. They are limited to the range -1023 to
+1024 (IIRC) so the VM doesn't know how to execute jumps beyond these
limits.

> By the way if I should split my method, suppose the next scenario:
> I got an object (suppose a cube) and I would like to modify their
> behavior making a translation or any transformation with respect to a
> second object, how could get access to the behavior of the second object
> accessing it from the first object? How to gain access to their variables?

You send messages. In general you cannot get access to another object's
variables unless that object allows it by providing accessor messages.
In Smalltalk all object interaction is based on message-passing, there
simply isn't a way of accessing another objects variables directly.

Cheers,
- Andreas

Re: error with code > 1 Kb

2008-07-19T11:08:30Z

Thank you!

But, I don't get very clear why does exist this limitation. Do you know if there is any document where I could read about this limitation?

By the way if I should split my method, suppose the next scenario:
I got an object (suppose a cube) and I would like to modify their behavior making a translation or any transformation with respect to a second object, how could get access to the behavior of the second object accessing it from the first object? How to gain access to their variables?

Does it have sense? Thank you for your time.

Rafael

On Thu, Jul 17, 2008 at 7:35 PM, Andreas Raab <andreas.raab@...> wrote:

That's a limit of the compiler / byte code representation. Split your method into two and have one call the other instead.

Cheers,
- Andreas

Rafael Rojano wrote:

Dear all,

Does any body knows why the code in each class should be less than 1 KB?
When I wrote code bigger than 1 KB I got an error from the compiler.

Regards,
Rafael

Re: Hedgehog unreachable :)

2008-07-18T09:21:09Z

Hi everybody

Just an observation, it seems that the problem would be with the ports. For example in my University these port are blocked. For this reason the servers are unreachable, check if this is not your problem.

Regards,
Rafael

On Fri, Jul 18, 2008 at 11:02 AM, Liz Wendland <liz@...> wrote:

Hi Thomas,

Hm, not sure why it is acting so flaky today. Try it again?
Thanks,
Liz

tb@... wrote:

Dear Liz!

Thank you for your response. It's still unreachable :)

Cheers...
Thomas Braun

Re: Hedgehog unreachable :)

2008-07-18T09:02:42Z

Hi Thomas,

Hm, not sure why it is acting so flaky today. Try it again?
Thanks,
Liz

tb@... wrote:
> Dear Liz!
>
> Thank you for your response. It's still unreachable :)
>
> Cheers...
> Thomas Braun
>

Re: Hedgehog unreachable :)

2008-07-18T08:49:39Z

Dear Liz!

Thank you for your response. It's still unreachable :)

Cheers...
Thomas Braun

Re: Hedgehog unreachable :)

2008-07-18T07:27:49Z

Dear Thomas,

I have restarted this - thanks for letting us know.

Liz Wendland
UofM

tb@... wrote:
> Hi,
> hedgehog.software.umn.edu:8888 seems to be down.
>
> Thomas Braun
>

Hedgehog unreachable :)

2008-07-18T05:15:04Z

Hi,
hedgehog.software.umn.edu:8888 seems to be down.

Thomas Braun

Re: error with code > 1 Kb

2008-07-17T17:35:04Z

That's a limit of the compiler / byte code representation. Split your
method into two and have one call the other instead.

Cheers,
- Andreas

Rafael Rojano wrote:
> Dear all,
>
> Does any body knows why the code in each class should be less than 1 KB?
> When I wrote code bigger than 1 KB I got an error from the compiler.
>
> Regards,
> Rafael

error with code > 1 Kb

2008-07-17T17:13:14Z

Dear all,

Does any body knows why the code in each class should be less than 1 KB?
When I wrote code bigger than 1 KB I got an error from the compiler.

Regards,
Rafael

GPGPU in Croquet

2008-07-16T01:36:13Z

I've been playing with chaotic attractors of dynamical systems in Croquet, computed on the GPU. The code is based on David Faught's procedural textures code. Here's a movie of a simple system:

http://au.youtube.com/watch?v=10h2XhP0u0g

The cube is a parameter space for a parameter of the system.

The same code could also be used for other things like physics simulations, but it's not quite ready for public release just yet.

Re: Does anyone have any working examples in Croquet?

2008-07-15T22:25:35Z

I think that Sathya is a robot. The exact same message was sent in response to two different threads:

Re: [croquet-dev] Message queues: TIsland vs TIslandController

Re: [croquet-dev] The appropriate view mode for CAD applications

(and it already suckered me to respond to a previous message: [croquet-dev] how to intract object in opencroquet)

I wonder if it's fully automatic?

Josh

On Jul 15, 2008, at 8:42 PM, Les wrote:

Hi, Sathiya,
Note that I posted your question in a new thread. Always use a new
thread. In the address field you can select the address of the mailing
list, and copy it, then create a new message, with a subject line for
what you need.

Regards,
Les H
On Tue, 2008-07-15 at 11:19 +0530, sathiya seelan wrote:
hi i'm sathya

u have any example application ( using croquet).........................

thks

Re: CROQUET, HELP WITH KEYBOARD NAVIGATION

2008-07-15T21:21:53Z

Hi Kweku,

Welcome!

Could you describe a little of what you've done so far?

Do you have some goals for exploring developing in Croquet you would like to share so we can give you some additional ideas to help you along the way?

You can have a look at the keyStroke: method in the KAvatarUser class to begin you exploration.

keyStroke: evt
    | char code |
    char := evt keyCharacter.
    code := evt keyValue.
    char = $w ifTrue: [^self startForward].
    char = $s ifTrue: [^self startBack].
    char = $q ifTrue: [^self startRotateLeft].
    char = $e ifTrue: [^self startRotateRight].
    char = $a ifTrue: [^self left].
    char = $d ifTrue: [^self right].
    code = 28 ifTrue: [^self left].
    code = 29 ifTrue: [^self right].
    code = 30 ifTrue: [^self up].
    code = 31 ifTrue: [^self down].
    ^super keyStroke: evt

Cheers,
Darius

On Tue, Jul 15, 2008 at 8:05 PM, Kweku Danso <kweku.danso@...> wrote:

Hi,
I'm in Ghana and just started developing in croquet. I was
wandering if you could help me with navigation. i want to use the
keyboard (WSAD) to move my avatar. i saw an example in KAT and tried
to go through the source code but no success.
Really need help.

Thanks,

Kweku D.

Does anyone have any working examples in Croquet?

2008-07-15T20:42:19Z

Hi, Sathiya,
Note that I posted your question in a new thread. Always use a new
thread. In the address field you can select the address of the mailing
list, and copy it, then create a new message, with a subject line for
what you need.

Regards,
Les H
On Tue, 2008-07-15 at 11:19 +0530, sathiya seelan wrote:
> hi i'm sathya

u have any example application ( using croquet).........................

thks

CROQUET, HELP WITH KEYBOARD NAVIGATION

2008-07-15T20:05:24Z

Hi,
I'm in Ghana and just started developing in croquet. I was
wandering if you could help me with navigation. i want to use the
keyboard (WSAD) to move my avatar. i saw an example in KAT and tried
to go through the source code but no success.
Really need help.

Thanks,

Kweku D.

Re: How to catch multiple keyStroke?

2008-07-15T08:56:18Z

Hi Phua Khai Fong,

I don't have the code in front of me, but usually there is a key stroke "down" even and a key stroke "up" even at a lower level than the getting a character event. To look for keyboard "cord" presses, while looking for those events you would have to look for the 'w' "down" and a 'd' "down" before seeing a 'w' up event.

Cheers,
Darius
______________

On Tue, Jul 15, 2008 at 3:31 AM, Phua Khai Fong <kayef8@...> wrote:

Hi,

I am trying to implement some keyboard functions using the keyStroke: method.

How can I catch multiple keyStroke: together?

For example, if the 'w' key is used to move forward and the 'd' key is to strafe right, I would want to press both together and move in a diagonal manner.

Currently, I can only have a single keyStroke: at a time which only the last key pressed is recorded.

Send instant messages to your online friends http://uk.messenger.yahoo.com

Re: How to catch multiple keyStroke?

2008-07-15T03:51:21Z

Phua Khai Fong wrote:

Hi,

I am trying to implement some keyboard functions using the keyStroke: method.

How can I catch multiple keyStroke: together?

Hello,

I think the example given by Bert here: http://www.nabble.com/Detecting-keyboard-state---finding-older-fixes-td15779144.html#a15836979

will do what you want.

Note that you will probably have to catch auto repeat keystrokes sent by Windows or Linux- see the rest of the thread.

...Stan

Re: Updating CPublishSpaceDialog

2008-07-15T03:51:04Z

Hello,
I just looked over the Smalltalk code and it looks like it only saves the
screenshot, but nothing else so far.

Thomas Braun

How to catch multiple keyStroke?

2008-07-15T03:31:33Z

Hi,

I am trying to implement some keyboard functions using the keyStroke: method.

How can I catch multiple keyStroke: together?

For example, if the 'w' key is used to move forward and the 'd' key is to strafe right, I would want to press both together and move in a diagonal manner.

Currently, I can only have a single keyStroke: at a time which only the last key pressed is recorded.

Send instant messages to your online friends http://uk.messenger.yahoo.com

Re: Open GlL issue

2008-07-14T22:51:28Z

hi i'm sathya

u have any example application ( using croquet).........................

thks

Re: Message queues: TIsland vs TIslandController

2008-07-14T22:50:39Z

hi i'm sathya

u have any example application ( using croquet).........................

thks

Re: The appropriate view mode for CAD applications

2008-07-14T22:49:41Z

hi i'm sathya

u have any example application ( using croquet).........................

thks

Re: Updating CPublishSpaceDialog

2008-07-14T13:44:31Z

Extending this thread hoping it helps others (also as I dig in deeper) ...
Wrote a script and first just grabbed all $_POST variables ... ends up
$_POST["screenshot"] is the only variable with what looks like would contain
the .c3d template data however when opening it in Cobalt nothing loads (no
error messages either).

Guessing Im close (those the $_POST["screenshot"] is more than likely a jpg
image?)

===

Re: Updating CPublishSpaceDialog

2008-07-14T12:41:30Z

Found what I was looking for (publishSpaceNamed) & have changed the "url :=" to
the location I want to send the world template data to.... now looking at these
2 lines:

=======
result := HTTPClient httpPostMultipart: url args: args.
Transcript show: result content.
=======

Now writing a PHP script to process what appears to be posted HTTP form
elements being sent (looked up "httpPostMultipart")? Not getting anything &
wondering if I am even close to being on the right track?

Updating CPublishSpaceDialog

2008-07-14T09:39:46Z

I am wanting to update the CPublishSpaceDialog class to
point to a location other than earth.software.umn.edu in
the current Cobalt code

* I am assuming this class is functional for publishing
.c3d templates?
* This is done via FTP?

I am having trouble locating "earth.software.umn.edu" to
make the change ... I am sure this is a simple process...
Just needing a bit of guidance

Any help would be appreciated !

Rich

======
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