Re: [osg-users] [EXTERNAL] Re: Is there a binary distribution available for version 3.4.0?

[Chris Hanson]

I've actually toyed with hooking up OSG support for Conan, but never
actually did it.

On Tue, Oct 10, 2017 at 6:01 AM, Alberto Luaces  wrote:

> Chris Hanson writes:
>
> > I think I've since come up with an idea to work around their weird
> > demands, but I wasted a bunch of time and hair on it. All of us who
> > build and distribute OSG binaries really should cooperate and work
> > together, but I'm not sure how to go about doing that.
>
> Maybe for windows users https://conan.io could be of use.
>
> --
> Alberto
>
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Re: [osg-users] Obj model visualization using osg

[Eon Strife]

Hi Jai,
There is a research paper for automated exploded view :

http://grail.cs.washington.edu/projects/exview3D/

You might want to implement it based on this paper, or contact the authors.

Cheers,
Eon

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Re: [osg-users] Obj model visualization using osg

[Jai Singla]

Hi,

OK.

Thank you!

Cheers,
Jai

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Re: [osg-users] [forum] Problem With Osg Texture Colors!

[Alberto Luaces]

"Bobak Hossainkhani" writes:

> Hi,
> I Have Some Problems With .Obj Model's That Load With OSGViewer
> I Dont Know Why When Load A Colorfully Obj With Jpeg Texture , Colors On Obj 
> Was Mixed And Dont Show True Colors.If Anybody Have The Solution Please Help 
> Me.
> In Attachment I Send A 3d Model Show In Marvelous Design And OSGViewer and 
> Flower Color was Different.
> ... 

Hi, Bobak.  Could it be that the OBJ export function of your software
(I assume "Maverlous Design") simplifies the model?

Since you cannot attach shaders or normal maps in OBJ (yes, you could in
theory, but the receiving software should know how to use them), maybe
your software is trying to approximate the appearance.  Can you try any
other model format?

-- 
Alberto

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[osg-users] [forum] Problem With Osg Texture Colors!

[Bobak Hossainkhani]

Hi,
I Have Some Problems With .Obj Model's That Load With OSGViewer
I Dont Know Why When Load A Colorfully Obj With Jpeg Texture , Colors On Obj 
Was Mixed And Dont Show True Colors.If Anybody Have The Solution Please Help Me.
In Attachment I Send A 3d Model Show In Marvelous Design And OSGViewer and 
Flower Color was Different.
... 

Thank you!

Cheers,
Bobak

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Attachments: 
http://forum.openscenegraph.org//files/1_112.png
http://forum.openscenegraph.org//files/2_454.png


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Re: [osg-users] [EXTERNAL] Re: Is there a binary distribution available for version 3.4.0?

[Alberto Luaces]

Chris Hanson writes:

> I think I've since come up with an idea to work around their weird
> demands, but I wasted a bunch of time and hair on it. All of us who
> build and distribute OSG binaries really should cooperate and work
> together, but I'm not sure how to go about doing that.

Maybe for windows users https://conan.io could be of use.

-- 
Alberto

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Re: [osg-users] OpenSceneGaph-3.5.7 developer release tagged

[Alberto Luaces]

Cross-compiling with mingw (gcc 6.3.0) — no problems when running
osgversion or osgviewer.

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Re: [osg-users] [osgPlugins] Multiple video textures using ffmpeg plugin

[Michael Maurus]

Hi guys,

Thanks for the replies.
I tried using the suggested ffmpeg plugin changes, but it didn't make a 
difference.
Turns out the culprit was automatic texture scaling to power of two texture 
size.
After setting the resizePowerOfTwoHint to false, I was able to play two 720p 
videos with 60fps.

Cheers,
Michael

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Re: [osg-users] Obj model visualization using osg

[Jan Ciger]

On Tue, Oct 10, 2017 at 11:11 AM, Jai Singla  wrote:

> Hi Chris,
>
> Yeah correct. we have some engine models designed in CREO SW in which all
> parts are explicit modeled. Now , How we can achieve exploded view and
> again parts assembly and experience it using HMD devices?
>
> Any video recording and animation will be add on .
>
>
> Is there any plugin or utility in open source domain to achieve the same?
>
>
I am afraid that there is no "magic plugin" or utility, even less open
source, especially when it concerns CAD models. You will have to program
this, animating procedurally the translations/rotations of the parts as you
need. There will likely be also some interaction needed so that the user
can manipulate the model, etc. This is all very much application specific,
so you likely won't find a generic tool doing this.

And it also depends heavily on what software you are using for driving the
HMDs. And also which HMD - e.g. Vive or Oculus Rift don't have the same API
and while e.g. Unity3D tries to abstract away the differences, you will
still need to deal with them.

Regards,

Jan
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Re: [osg-users] Obj model visualization using osg

[Jai Singla]

Hi Chris,

Yeah correct. we have some engine models designed in CREO SW in which all parts 
are explicit modeled. Now , How we can achieve exploded view and again parts 
assembly and experience it using HMD devices? 

Any video recording and animation will be add on . 


Is there any plugin or utility in open source domain to achieve the same?



Thank you!

Cheers,
Jai

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Re: [osg-users] Obj model visualization using osg

[Christian Buchner]

What you are describing is a highly specialized application, not a generic
3D model viewer.

This application also has a lot of requirements concerning the 3D model
itself. All parts must be explicitly modeled. Most 3D models of cars do not
fulfill this requirement as these would simply consist of a single mesh for
the car's body to speed up rendering. Hidden parts (like the engine) are
not modeled for rendering performance reasons and often back faces of said
mesh are culled.

Furthermore the logic to decide in which order to explode the parts, and in
what direction they need to move in order to not intersect with other parts
is quite complex. It's probably best if this is done manually for each 3D
model.

As one example for such an exploded view of a model, the Steam VR Lab demo
"Robot Repair" comes into my mind. It's fun to look at, as parts are moving
and rotating in exploded view.

Christian


2017-10-10 10:53 GMT+02:00 Jai Singla :

> Hi,
>
> Sorry Robert.
>
> I will again attempt to put my point .
>
> Suppose I have a model of car in osg .ive format
>
> Disassembly mode : To disintegrate car's different parts like steering,
> doors, wheels etc.
>
> and again assembly mode : Integrate all the parts back to original
> position.
>
> Actually, we want to have it for VR kind of stuff.
>
> I am aware of some open source viewers for integration of HMD devices.
> But, actual training or experience purpose this integration /
> disintegration of models will be a great help.
>
>
> Thank you!
>
> Cheers,
> Jai
>
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> http://forum.openscenegraph.org/viewtopic.php?p=72144#72144
>
>
>
>
>
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Re: [osg-users] Obj model visualization using osg

[Jai Singla]

Hi,

Sorry Robert. 

I will again attempt to put my point .

Suppose I have a model of car in osg .ive format 

Disassembly mode : To disintegrate car's different parts like steering, doors, 
wheels etc. 

and again assembly mode : Integrate all the parts back to original position.

Actually, we want to have it for VR kind of stuff. 

I am aware of some open source viewers for integration of HMD devices. 
But, actual training or experience purpose this integration / disintegration of 
models will be a great help.


Thank you!

Cheers,
Jai

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Re: [osg-users] Obj model visualization using osg

[Robert Osfield]

Hi Jai,

On 10 October 2017 at 09:04, Jai Singla  wrote:

> Assembly disassembly means suppose we have a complex model of aircraft or
> car now by disassembly all the parts can be put apart and with Assembly,
> one by one parts can be integrated


Again not really explaining what you mean by disassembly.  Not all of us
are in your head and able to check exactly what you mean, that are some
many ways to interpret.

My best guess is you are wanting to transform components of the model in
some way to separate them for visual inspection, but really that's only a
guess.  Again it's something really open ended.  This type of functionality
isn't a role of a scene graph, but of a high level domain specific
application.

Robert.
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Re: [osg-users] Obj model visualization using osg

[Jai Singla]

Hi,

Assembly disassembly means suppose we have a complex model of aircraft or car 
now by disassembly all the parts can be put apart and with Assembly, one by one 
parts can be integrated

Thank you!

Cheers,
Jai

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Re: [osg-users] Obj model visualization using osg

[Robert Osfield]

On 7 October 2017 at 06:56, Jai Singla  wrote:

> Able to convert model using osgconv and visualize it. Shall we do assembly
> / disassembly of model using OSG
>

What do you actually mean by assembly/disassembly of model, it's rather too
open ended to give any answer.

As a general statement, the OSG is a scene graph, used by developers to
create a wide range graphics applications, it's not a high level
application or game framework,

Robert.
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Re: [osg-users] Obj model visualization using osg

[Alberto Luaces]

"Jai Singla" writes:

> Hi,
>
> But, now a days many sw are available like unity, worldviz vizard which are 
> built on OSG ? Is not any plug-in developed for OSG directly?
>

Hi Jai,

Certainly, Unity is not built on OSG.  I do not know about Vizard, but
I think you are right about the point that OSG is more low-level than
the products you mentioned.

I do not know any plug-in that fits the tasks that you are mentioning,
but maybe others in the list can say if they recall something similar.

-- 
Alberto

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