Re: [osg-users] transfer data to shader with osg::texture
Am 10/5/2016 um 3:37 AM schrieb liu ming: Hi Wojtek ,Thank you for your reply,I have tried GL_RGBA16F_ARB instead like that "texture0->setInternalFormat(GL_RGBA16F_ARB);",but it seemed like not valid.The value still is 0..1 range.Are there other solutions? Thank you. So they are now _between_ 0 and , instead of 0 _or_ 1? Then, at least, you're on the right track. What seems wrong however is your sampler setup. Try this instead: osg::Uniform* sampler = new osg::Uniform(osg::Uniform::SAMPLER_1D, "data"); sampler->set(0); //assign unit ss->addUniform(sampler); ss->setTextureAttribute(0/*unit*/, texture0 ,osg::StateAttribute::ON ); Cheers Sebastian -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=68852#68852 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] transfer data to shader with osg::texture
Hi Wojtek ,Thank you for your reply,I have tried GL_RGBA16F_ARB instead like that "texture0->setInternalFormat(GL_RGBA16F_ARB);",but it seemed like not valid.The value still is 0..1 range.Are there other solutions? Thank you. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=68852#68852 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] transfer data to shader with osg::texture
Hi,
I think internal format GL_RGBA16 normalizes your float values to 0..1
range. Try GL_RGBA16F_ARB instead.
Cheers,
Wojtek Lewandowski
2016-10-04 17:00 GMT+02:00 liu ming <81792...@qq.com>:
> Hi,
>
> I want to send a set of data to geometry shader with osg::texture,I've
> got a problem:in the geometry shader,I can use glsl function"texelFetch"to
> get the texel's values,and use the values to draw a triangle,But the values
> is not correct. the values always are "0" or "1",not the original input.It
> make me confused. whether the code" texture0->setInternalFormat(GL_RGBA16);"
> wrong?How can I get the correctly texel's values?
>
> The code:
>
>
> Code:
> //.
> osg::ref_ptr< osg::StateSet > ss = new osg::StateSet;
> osg::Texture1D * texture0 = new osg::Texture1D;
> texture0->setDataVariance(osg::Object::DYNAMIC);
> osg::ref_ptr image = new osg::Image;
> image->allocateImage( 4, 1, 1, GL_RGB, GL_FLOAT );
> //write data to the image
>osg::Vec3* ptr1 = (osg::Vec3*)image->data();
>*ptr1=osg::Vec3( 0.0,0.0,0.0);
>*ptr1++;
>*ptr1= osg::Vec3( 40.0,0.0,0.0);
>*ptr1++;
>*ptr1=osg::Vec3( 20.0,0.0,20.0);
>
> texture0->setImage(image);
> texture0->setInternalFormat(GL_RGBA16);
> //
> osg::ref_ptr< osg::Uniform > sample0 = new osg::Uniform( "data", 0 );
>ss->addUniform(sample0);
> ss->setTextureAttributeAndModes(0,
> texture0,osg::StateAttribute::ON);
>//
>
> //--
> //geometyr shader code
> //--
> //.
> uniform sampler1D data;
> void main()
> {
> //get the texel's value,but the value is wrong
> vec4 C0=vec4(texelFetch(data,0,0).xyz,1.0);
> vec4 C1=vec4(texelFetch(data,1,0).xyz,1.0);
> vec4 C2=vec4(texelFetch(data,2,0).xyz,1.0);
>
> //use value to draw a triangle
> gl_Position=osg_ModelViewProjectionMatrix*C0;
> EmitVertex();
> gl_Position=osg_ModelViewProjectionMatrix*C1;
> EmitVertex();
> gl_Position=osg_ModelViewProjectionMatrix*C2;
> EmitVertex();
>
> EndPrimitive();
> }
>
>
>
> Thank you! My english is poor ,sorry.
>
> Cheers,
> liu
>
> --
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=68848#68848
>
>
>
>
>
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[osg-users] transfer data to shader with osg::texture
Hi,
I want to send a set of data to geometry shader with osg::texture,I've got a
problem:in the geometry shader,I can use glsl function"texelFetch"to get the
texel's values,and use the values to draw a triangle,But the values is not
correct. the values always are "0" or "1",not the original input.It make me
confused. whether the code" texture0->setInternalFormat(GL_RGBA16);" wrong?How
can I get the correctly texel's values?
The code:
Code:
//.
osg::ref_ptr< osg::StateSet > ss = new osg::StateSet;
osg::Texture1D * texture0 = new osg::Texture1D;
texture0->setDataVariance(osg::Object::DYNAMIC);
osg::ref_ptr image = new osg::Image;
image->allocateImage( 4, 1, 1, GL_RGB, GL_FLOAT );
//write data to the image
osg::Vec3* ptr1 = (osg::Vec3*)image->data();
*ptr1=osg::Vec3( 0.0,0.0,0.0);
*ptr1++;
*ptr1= osg::Vec3( 40.0,0.0,0.0);
*ptr1++;
*ptr1=osg::Vec3( 20.0,0.0,20.0);
texture0->setImage(image);
texture0->setInternalFormat(GL_RGBA16);
//
osg::ref_ptr< osg::Uniform > sample0 = new osg::Uniform( "data", 0 );
ss->addUniform(sample0);
ss->setTextureAttributeAndModes(0,
texture0,osg::StateAttribute::ON);
//
//--
//geometyr shader code
//--
//.
uniform sampler1D data;
void main()
{
//get the texel's value,but the value is wrong
vec4 C0=vec4(texelFetch(data,0,0).xyz,1.0);
vec4 C1=vec4(texelFetch(data,1,0).xyz,1.0);
vec4 C2=vec4(texelFetch(data,2,0).xyz,1.0);
//use value to draw a triangle
gl_Position=osg_ModelViewProjectionMatrix*C0;
EmitVertex();
gl_Position=osg_ModelViewProjectionMatrix*C1;
EmitVertex();
gl_Position=osg_ModelViewProjectionMatrix*C2;
EmitVertex();
EndPrimitive();
}
Thank you! My english is poor ,sorry.
Cheers,
liu
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Re: [osg-users] Attaching children to the prerender camera
good :) .. Glad you found your own way ! Cheers, Nick On Tue, Oct 4, 2016 at 4:14 PM, Mary-Ann Zorra wrote: > Hi Nick, > > I decided to restart this part, and reimplement the whole code. > Fortunately it worked fine, and my program behaves as expected. I have no > idea, what the problem was, but thanks for your help! > > Mary-Ann > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=68846#68846 > > > > > > ___ > osg-users mailing list > osg-users@lists.openscenegraph.org > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > -- trajce nikolov nick ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] multiple input with osgwidgets
Honestly I usually derive from osgGA::GUIEventHandler to handle mouse events. Cheers, Gianni -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=68849#68849 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] convert std::vector to osg::BufferObject
Hi guys, I have some problems with passing an std::vector to my shader as a uniform, and I was wondering, if anyone has some idea, how to do this. So my issue is that an std::vector of a custom defined data type have to get bound to the shader. I have an osg::UniformBufferObject and I would like to fill it with addBufferData(myVector). The problem is, that this method expects an osg BufferObject, and I can not figure it out, how I could convert my custom vector. I thought it should be possible, to create an osg::Array with any (custom) data type. But it seems, that you can only use the from osg predefined objects. So is there maybe an other way, to convert a vector to a BufferObject or am I doing something wrong? :/ Thank you! Cheers, Mary -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=68847#68847 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Attaching children to the prerender camera
Hi Nick, I decided to restart this part, and reimplement the whole code. Fortunately it worked fine, and my program behaves as expected. I have no idea, what the problem was, but thanks for your help! Mary-Ann -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=68846#68846 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Error with osgDB::readRefNodeFiles
HI Inna,
The osgDB::readRefNodeFile(..) function is a relatively recent
addition, older versions of the OSG don't have have it. Were you
following a new code example against an older version of the OSG?
Robert.
On 4 October 2016 at 12:15, Inna Reddy wrote:
> Hi all ,
>
> In my code , I have been using the osgDB::readRefNodefiles. When I do compile
> the code it throwing me an error saying :
>
>
>
> Error 2 error C2039: 'readRefNodeFiles' : is not a member of 'osgDB'
>
> Error 3 error C3861: 'readRefNodeFiles': identifier not found
>
> IntelliSense: namespace "osgDB" has no member "readRefNodeFiles"
>
>
> I have included the libs also.
>
> #include
> #include
> #include
>
>
> Code:
> and the code part is
> osg::ref_ptr loadedModel = osgDB::readRefNodeFiles(arguments);
> if (loadedModel.valid())
> {
> mainGroup->addChild(loadedModel);
>
> center = loadedModel->getBound().center();
> diameter = loadedModel->getBound().radius() * 2.0f;
> }
>
>
>
>
> Thank you!
>
> Cheers,
> Inna
>
> --
> Read this topic online here:
> http://forum.openscenegraph.org/viewtopic.php?p=68840#68840
>
>
>
>
>
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[osg-users] Camera manipulator changes for inverted y axis
Hi, I reverted the y axis by adjusting the camera projection matrix: Code: camera->setProjectionMatrixAsPerspective(30.0f, static_cast(traits->width) / static_cast(traits->height), 1.0f, 1.0f); auto originalProjection = camera->getProjectionMatrix(); osg::Matrixd reverseYMat; reverseYMat.makeScale(osg::Vec3d(1.0, -1.0, 1.0)); camera->setProjectionMatrix(reverseYMat * originalProjection); The code works, however I have a problem with the trackball manipulator. The manipulator sets the home position reverse in Z direction: everything is positioned upside down. Furthermore when I rotate the camera the movement in the Z direction seems to be reversed. What should I do to change the behavior of the manipulator to the expected one? Thank you! Cheers, tunc -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=68828#68828 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] multiple input with osgwidgets
gambr wrote: > Hi Meldryt, > I worked with osgWidget in the past. I move a widget with > left_mouse+mouse_move and resize it with central_mouse_button+mouse_move. > I also tried to show a contextual menu clicking with right mouse button on it. > Now I'm on OSG 3.4.0 but moved recentrly from OSG 3.0.1. > > Could you please just write "one" of the cases not working in your > implemetation? > > Cheers, > Gianni This all is one case. Its also not triggering for my parent window (canvas). When i have two buttons pressed and release one of them, i get no event (release or drag) for the second button. I don't know why this is happening with osgWidget::Input but not with my CameraManipulator. I could try this with 3.4.0, maybe it was fixed in the past. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=68843#68843 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Vector script out of range
Hi Uma,
There is no model attached.
Without giving us a model that shows this behavior and some basic
information on your OSG-Version, build environment etc. it is hard to
guess what is going on.
Most likely the ply-reader produces the error, so please try to attach
the model so we can investigate. In case you are building OSG yourself,
it should be easy to attach a debugger and check what is going on for
yourself ...
Cheers
Sebastian
Hi,
I have tried a simple program in C++ to render 3d model using Osg Viewer.
When I am trying to run the code I am getting "vector script out of range error
" for some 3d model.
This is my code.
/*osg header files */
int main(int argc,char**argv)
{
/*using ref_ptr*/
osg::ref_ptr root = osgDB::readNodeFile("bunny.ply");
osgViewer::Viewer viewer;
viewer.setSceneData(root.get());
return viewer.run();
}
can some body tell me what is the problem. but it is working for some models. I
have attached the 3d model file. I have loaded 2963 KB file
Thank you!
Cheers,
Uma
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[osg-users] Vector script out of range
Hi,
I have tried a simple program in C++ to render 3d model using Osg Viewer.
When I am trying to run the code I am getting "vector script out of range error
" for some 3d model.
This is my code.
/*osg header files */
int main(int argc,char**argv)
{
/*using ref_ptr*/
osg::ref_ptr root = osgDB::readNodeFile("bunny.ply");
osgViewer::Viewer viewer;
viewer.setSceneData(root.get());
return viewer.run();
}
can some body tell me what is the problem. but it is working for some models. I
have attached the 3d model file. I have loaded 2963 KB file
Thank you!
Cheers,
Uma
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Re: [osg-users] Error with osgDB::readRefNodeFiles
Hi, Sorry, I found my mistake. :) I have to use osg::ref_ptr loadedModel = osgDB::readNodeFiles(arguments); //not the readRefNodeFiles. thanks all . ... Thank you! Cheers, Inna -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=68841#68841 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Error with osgDB::readRefNodeFiles
Hi all ,
In my code , I have been using the osgDB::readRefNodefiles. When I do compile
the code it throwing me an error saying :
Error 2 error C2039: 'readRefNodeFiles' : is not a member of 'osgDB'
Error 3 error C3861: 'readRefNodeFiles': identifier not found
IntelliSense: namespace "osgDB" has no member "readRefNodeFiles"
I have included the libs also.
#include
#include
#include
Code:
and the code part is
osg::ref_ptr loadedModel = osgDB::readRefNodeFiles(arguments);
if (loadedModel.valid())
{
mainGroup->addChild(loadedModel);
center = loadedModel->getBound().center();
diameter = loadedModel->getBound().radius() * 2.0f;
}
Thank you!
Cheers,
Inna
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