Re: [osg-users] Use glTexStorrage to avoid frame rate breaks when osg::ICO is uploading mipmap texture

[Marcel Pursche]

Hi,

to me this looks like a driver implementation specific problem. I would guess 
that the nVidia driver only allocates enough memory for the first mipmap-level 
on the first glTexImage2D. On the second glTexImage2D call it reallocates 
memory for all mipmap-level and copies the first level to the new memory. This 
would explain why the second glTexImage2D call is the slowest.
Have you tried setting GL_TEXTURE_BASE_LEVEL and GL_TEXTURE_MAX_LEVEL before 
the first glTexImage2D call? Maybe this gives a hint to the driver, that the 
texture will have more than just one level.

Another problem you should consider is that glTexStorage2D is only in the core 
since version 4.2. So it will not work on older hardware.

Another question: Do you now how osgEarth creates the new textures? Does is 
create a new texture for every loaded image? If yes, it could be a good idea to 
create set of textures at startup and re-use them(only change the content with 
glTexSubImage2D). This could also help to improve the performance. 

Thank you!

Cheers,
Marcel

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Re: [osg-users] How to cancel transparency ?

[Paul Martz]

In the osgWorks osgwTools library, TransparencyUtils.cpp, I enable
transparency by first copying the original StateSet and saving it as
UserData, then modifying the active StateSet to turn on transparency
(BlendFunc, RenderBin, etc).

To disable transparency, I simply restore the original StateSet from
UserData.
   -Paul



On Fri, May 30, 2014 at 5:08 AM, sunpeng  wrote:

> I use following code to set transparency:
>
> osg::StateSet* state = root->getOrCreateStateSet();
>
>
> state->setMode(GL_LIGHTING,osg::StateAttribute::OFF|osg::StateAttribute::PROTECTED);
>
> state->setMode(GL_BLEND,osg::StateAttribute::ON);
> state->setMode(GL_DEPTH_TEST,osg::StateAttribute::ON);
> state->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
>
> osg::BlendColor* bc =new osg::BlendColor(osg::Vec4(1.0,1.0,1.0,0.0));
> osg::BlendFunc*bf = new osg::BlendFunc();
> state->setAttributeAndModes(bf,osg::StateAttribute::ON);
> state->setAttributeAndModes(bc,osg::StateAttribute::ON);
> bf->setSource(osg::BlendFunc::CONSTANT_ALPHA);
> bf->setDestination(osg::BlendFunc::ONE_MINUS_CONSTANT_ALPHA);
> bc->setConstantColor(osg::Vec4(1,1,1,0.5));
>
> How to close transparency effect? I tried to use:
>  state->setMode(GL_BLEND,osg::StateAttribute::OFF);
>  state->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF);
>
> but it seems not work?
> tks!
>
> peng
>
>
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Re: [osg-users] Info about panoramic images in OSG

[Adrián López]

Hi,

sorry for my bad explaining skills! I'll ask for a meeting and we will try to 
clarify ourselves. Then, I'll write back here a better explanation of what we 
want to do.

And thanks for your help. In the meantime I'll search for info on 
texture-mapping.

Cheers,
Adrián

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Re: [osg-users] FirstPersonManipulator moveForward()/moveUp() Question

[Fitz Chivalrik]

Hi,

Nobody can give me a hint in the right direction? Or is it just plain obvious?

Cheers,
Fitz

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[osg-users] (no subject)

[wyg030...@163.com]

Dearl all,
I have tried to use quad buffer stereo displaying mode, and it successed.
Here, I have the problem, I want to save the scene as a picture, especially one 
left-eye and right-eye.
I do not want to render the scene using LEFT_EYE and RIGHT_EYE one by one, 
sometimes we need interaction.

Then,I met the problem, I used the camera's attach function api, then got a 
image, frame by frame (just testing it).
but the result is not a left-eye and a right-eye. 
How to solve it ？？
how to get the left-color-buffer and right-color-buffer ?
can someone give me suggestion or show the code segment?

thanks.

whu
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[osg-users] [build] OSG build on maverick

[livio isaia]

Hi,

I' trying to build OSG on mac OSX Maverick and always get error:
ld: framework not found SDL
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Now I have SDL framework installed on /System/Library/Frameworks
so why cannot be found?
Does anybody have an idea?
Thank you!

Cheers,
livio

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[osg-users] [osgViewer::CompositeViewer] Transparency between views

[Stephane Mas]

Hi all, and thanks in advance for any interest to this post.

I'm trying to build an application with multiple views and an overlay GUI. 

I dediced to use the CompositeViewer to allow different scenes and manipulators 
in each background views. Unfortunately, I don't manage to make the foreground 
view transparent. It always hide the background views. Is it only a 
configuration issue (camera, graphical context ?), or is it something that 
Views can't do ?

Here is my code for now :

Code:

osgViewer::CompositeViewer * compositeViewer = new osgViewer::CompositeViewer();

// Initialize the graphic context
osg::ref_ptr traits = new 
osg::GraphicsContext::Traits;
traits->x = 100;
traits->y = 100;
traits->width = 300;
traits->height = 300;
traits->windowDecoration = true;
traits->doubleBuffer = true;
traits->sharedContext = 0;
osg::ref_ptr gc = 
osg::GraphicsContext::createGraphicsContext(traits.get());

// Build background view
osgViewer::Viewer * backgroundView = new osgViewer::Viewer();
backgroundView->getCamera()->setGraphicsContext(gc.get());
backgroundView->getCamera()->setViewport(new osg::Viewport(0, 0, traits->width, 
traits->height));
compositeViewer->addView( backgroundView );

// Fill background view
osg::ref_ptr backgroundNode = osgDB::readNodeFile(pathToScene);
backgroundView->setSceneData(backgroundNode);

// Build foreground view
osgViewer::Viewer * foregroundView = new osgViewer::Viewer();
foregroundView->getCamera()->setGraphicsContext(gc.get());
foregroundView->getCamera()->setViewport(new osg::Viewport(traits->width/2, 0, 
traits->width/2, traits->height/2));
compositeViewer->addView( foregroundView );

// Try to set it transparent
foregroundView->getCamera()->setClearColor(osg::Vec4(0, 0, 0, 0));

// Fill foreground view
osg::ref_ptr foregroundNode = osgDB::readNodeFile(pathToScene);
foregroundView->setSceneData(foregroundNode);

// Run the composite viewer
compositeViewer->run();




The foregroundView is indeed set to black, but is not transparent at all.

Thank you for any help !
Stephane[/code]

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[osg-users] App android with OSG

[Mario Blangiforti]

Hi,
 i'm new user in the forum. 
I have to realize an android app (i use Eclipse like IDE) in which i'll use OSG 
to load a .tiff file. 
First of all i didn't understand how to install the library using Windows 8 
like operative system.Is there some tutorial which i can consult ?
Eventually, which way have i to use to load the file .tiff?

Thank you!

Cheers,
Mario

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Re: [osg-users] Info about panoramic images in OSG

[Chris Hanson]

Well, considering I don't really know what you're trying to actually
_achieve_, I can't really suggest much on the technique. I think I would
have probably texture-mapped the points, but I don't know what actual
effect you're looking for here.

Feel free to email me privately if you wish.


On Fri, May 30, 2014 at 4:36 AM, Adrián López  wrote:

> Hi,
>
> For what I've been told, the idea is to "load" the panoramic cube-faces
> onto the osg::Viewer where we're displaying the point cloud and "insert"
> them in their respective positions in the cloud (we have available the XYZ
> parameters for each shot).
>
> And yes, we thought of texturing the part of the point cloud we are
> visualizing with its associated cube face. But as I said, I'm blind about
> this topic so I would like to hear your thoughts and receive some guidance
> to point me in the right direction.
>
> Cheers!
> Adrián
>
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>
>
>
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[osg-users] How to cancel transparency ?

[sunpeng]

I use following code to set transparency:

osg::StateSet* state = root->getOrCreateStateSet();

state->setMode(GL_LIGHTING,osg::StateAttribute::OFF|osg::StateAttribute::PROTECTED);

state->setMode(GL_BLEND,osg::StateAttribute::ON);
state->setMode(GL_DEPTH_TEST,osg::StateAttribute::ON);
state->setRenderingHint(osg::StateSet::TRANSPARENT_BIN);

osg::BlendColor* bc =new osg::BlendColor(osg::Vec4(1.0,1.0,1.0,0.0));
osg::BlendFunc*bf = new osg::BlendFunc();
state->setAttributeAndModes(bf,osg::StateAttribute::ON);
state->setAttributeAndModes(bc,osg::StateAttribute::ON);
bf->setSource(osg::BlendFunc::CONSTANT_ALPHA);
bf->setDestination(osg::BlendFunc::ONE_MINUS_CONSTANT_ALPHA);
bc->setConstantColor(osg::Vec4(1,1,1,0.5));

How to close transparency effect? I tried to use:
 state->setMode(GL_BLEND,osg::StateAttribute::OFF);
 state->setMode(GL_DEPTH_TEST,osg::StateAttribute::OFF);

but it seems not work?
tks!

peng
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Re: [osg-users] Info about panoramic images in OSG

[Adrián López]

Hi,

For what I've been told, the idea is to "load" the panoramic cube-faces onto 
the osg::Viewer where we're displaying the point cloud and "insert" them in 
their respective positions in the cloud (we have available the XYZ parameters 
for each shot).

And yes, we thought of texturing the part of the point cloud we are visualizing 
with its associated cube face. But as I said, I'm blind about this topic so I 
would like to hear your thoughts and receive some guidance to point me in the 
right direction.

Cheers!
Adrián

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