Re: [osg-users] Experiments on Textures and Images, strange behavior.
Hi Gaëtan, If you are assigning a new Image to an already existing and possibly bound texture, try to set the image dirty. Secondly, you might want to try to set the texture explicitly to: stateset-setTextureAttributeAndModes( 0,map, osg::StateAttribute::ON | osg::StateAttribute::OVERRIDE); Cheers Sebastian Hi, I am trying to understand how texture ande Image are working //some initialized texture with contents osg::ref_ptrosg::Texture2D map //displays correctly the texture osg::StateSet* stateset = HUD_camera-getOrCreateStateSet(); stateset-setTextureAttributeAndModes( 0,map); //does not display the texture osg::ref_ptrosg::Texture2D lm = new osg::Texture2D; lm-setImage(map-getImage()); stateset-setTextureAttributeAndModes( 0,lm); Why ? Thank you! Cheers, Gaëtan -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=54501#54501 ___ 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] Experiments on Textures and Images, strange behavior.
Hi,
Ok I will try to make it clearer.
I have a generated CubeMap, and I want to display each face on a quad with a
HUD Camera. I first tried to generate on face in a Texture2D and it worked
welll since I don't have to copy the image in the original texture in a new
texture (on the opposite if I try to use getIMage(), setImage(), this does not
work anymore) to display it on a quad.
For the CubeMap,Ii want its images (6) to be embedded in Texture2D to simply be
displayed on a quad.
Here is the piece of code :
//map contains the generated Cube map when the function is called
void SDDebugHUD::setTexture(osg::ref_ptrosg::TextureCubeMap map){
osg::StateSet* stateset = HUD_camera-getOrCreateStateSet();
osg::ref_ptrosg::Texture2D lm = new osg::Texture2D;
lm-setDataVariance(osg::Object::DYNAMIC);
lm-setImage(map-getImage(3));
stateset-setTextureAttributeAndModes( 0,lm);
}
Thank you!
Cheers,
Gaëtan
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Re: [osg-users] Experiments on Textures and Images, strange behavior.
Hi Gaëtan, There is too much information about the usage of the textures and associated images to know what is going on, but my best guess is that your first texture is being used and has the UnRefImageDataAfterApply set to true (this is the default) so once it's used the image will be discarded, so your second texture-setImage() will be simply setting 0 which of course will not work. Personally I'd suggest not messing around with a second texture, just reuse the first one. If you for some reason really really need to reuse the same image then keep a ref_ptr to it so that you can guarantee it's lifetime. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Experiments on Textures and Images, strange behavior.
Hi,
I followed your advice and applied directly the cubemap on the quad using 3D
texture coordinates.
Allow me to ask another question are things are very weird !
I render the scene in the CubeMap
Code:
reflectionMap = new osg::TextureCubeMap;
reflectionMap-setTextureSize( 256, 256 );
reflectionMap-setInternalFormat( GL_RGBA);
camerasRoot = new osg::Group;
for(int i=0;i6;i++){
osg::ref_ptrosg::Camera camera = new osg::Camera;
camera-setViewport( 0, 0, 256, 256 );
camera-setClearMask( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT );
camera-setRenderOrder( osg::Camera::PRE_RENDER );
camera-setRenderTargetImplementation(
osg::Camera::FRAME_BUFFER_OBJECT );
camera-attach( osg::Camera::COLOR_BUFFER, reflectionMap,0,i );
camera-setReferenceFrame( osg::Camera::ABSOLUTE_RF );
camera-addChild( m_sceneroot );
camera-setPreDrawCallback(pre_cam);
camera-setPostDrawCallback(post_cam);
camera-setProjectionMatrixAsPerspective(90.0,1.0,1.0,100.0);
camerasRoot-addChild(camera);
cameras.push_back(camera);
}
Then this CubeMap is used twice per cycle.
First on a object, via shaders.
Second on two quads,displayed by a HUD camera (in order to see what is in the
map).
On the object, a still image is displayed corresponding to a render from a
previous execution of the application !
On the quads, this image is blended with the correct texture being rendered.
Each time I restart the application, a image of the previous execution is used.
It is sort of confusing.
Thank you!
Cheers,
Gaëtan[/code]
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Re: [osg-users] Experiments on Textures and Images, strange behavior.
Hi Gaëtan, On 10 June 2013 15:26, Gaëtan André gaetan.an...@gmail.com wrote: Then this CubeMap is used twice per cycle. First on a object, via shaders. Second on two quads,displayed by a HUD camera (in order to see what is in the map). On the object, a still image is displayed corresponding to a render from a previous execution of the application ! On the quads, this image is blended with the correct texture being rendered. Each time I restart the application, a image of the previous execution is used. It is sort of confusing. This is almost certainly down to an issue of order of setting the texture contents and using them. The OSG has a scheme for controlling the rendering order Camera's, and for render to texture Camera's you use camera-setRenderOrder(osg::Camera::PRE_RENDER); Please have a look at the osgprerender and osgprerendercubemap examples. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Experiments on Textures and Images, strange behavior.
Hi, Thanks again for replying. In my code camera-setRenderOrder(osg::Camera::PRE_RENDER); is present. I looked at the examples, there does not seem to have much difference. Cheers, Gaëtan -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=54521#54521 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Experiments on Textures and Images, strange behavior.
Hi, reflectionMap-setFilter(osg::TextureCubeMap::MIN_FILTER,osg::TextureCubeMap::LINEAR); reflectionMap-setFilter(osg::TextureCubeMap::MAG_FILTER,osg::TextureCubeMap::LINEAR); These two line solved my problem. What is the default filter and why does not it work with it ? Thank you! Cheers, Gaëtan -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=54526#54526 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Experiments on Textures and Images, strange behavior.
On 10 June 2013 18:10, Gaëtan André gaetan.an...@gmail.com wrote: reflectionMap-setFilter(osg::TextureCubeMap::MIN_FILTER,osg::TextureCubeMap::LINEAR); reflectionMap-setFilter(osg::TextureCubeMap::MAG_FILTER,osg::TextureCubeMap::LINEAR); These two line solved my problem. What is the default filter and why does not it work with it ? The defaults are for a mipmapped texture, if you were just rendering to the topmost level then unless you enabled the mipmap generation then these levels will be undefined. Note the mipMapGeneration line from the Camera::attach() inline docs: /** Attach a Texture to specified buffer component. * The level parameter controls the mip map level of the texture that is attached. * The face parameter controls the face of texture cube map or z level of 3d texture. * The mipMapGeneration flag controls whether mipmap generation should be done for texture.*/ void attach(BufferComponent buffer, osg::Texture* texture, unsigned int level = 0, unsigned int face=0, bool mipMapGeneration=false, unsigned int multisampleSamples = 0, unsigned int multisampleColorSamples = 0); Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Experiments on Textures and Images, strange behavior.
Hi, Thanks fo the details. Thank you! Cheers, Gaëtan -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=54530#54530 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Experiments on Textures and Images, strange behavior.
Hi, I am trying to understand how texture ande Image are working //some initialized texture with contents osg::ref_ptrosg::Texture2D map //displays correctly the texture osg::StateSet* stateset = HUD_camera-getOrCreateStateSet(); stateset-setTextureAttributeAndModes( 0,map); //does not display the texture osg::ref_ptrosg::Texture2D lm = new osg::Texture2D; lm-setImage(map-getImage()); stateset-setTextureAttributeAndModes( 0,lm); Why ? Thank you! Cheers, Gaëtan -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=54501#54501 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Experiments on Textures and Images, strange behavior.
Hi, initialize the texture and then reference it, in that order osg::ref_ptrosg::Texture2D lm = new osg::Texture2D; stateset-setTextureAttributeAndModes( 0,map); Nick On Sun, Jun 9, 2013 at 3:02 PM, Gaëtan André gaetan.an...@gmail.com wrote: Hi, I am trying to understand how texture ande Image are working //some initialized texture with contents osg::ref_ptrosg::Texture2D map //displays correctly the texture osg::StateSet* stateset = HUD_camera-getOrCreateStateSet(); stateset-setTextureAttributeAndModes( 0,map); //does not display the texture osg::ref_ptrosg::Texture2D lm = new osg::Texture2D; lm-setImage(map-getImage()); stateset-setTextureAttributeAndModes( 0,lm); Why ? Thank you! Cheers, Gaëtan -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=54501#54501 ___ 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] Experiments on Textures and Images, strange behavior.
Hi, Thank you for the reply. I am not quite sure to understand your answer. Do you mean I should do this : //does not display the texture osg::StateSet* stateset = HUD_camera-getOrCreateStateSet(); osg::ref_ptrosg::Texture2D lm = new osg::Texture2D; stateset-setTextureAttributeAndModes( 0,map); lm-setImage(map-getImage()); stateset-setTextureAttributeAndModes( 0,lm); Seems quite odd to me. Cheers, Gaëtan[/quote] -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=54503#54503 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Experiments on Textures and Images, strange behavior.
ah, I missread it. from your original post the map texture was not initialized and was used later in the statest. I had to write something like: osg::ref_ptrosg::Texture2D map = new osg::Texture2D; stateset-setTextureAttributeAndModes( 0,map); if you post your code in whole then the chance to get help if higher Nick On Sun, Jun 9, 2013 at 10:29 PM, Gaëtan André gaetan.an...@gmail.comwrote: Hi, Thank you for the reply. I am not quite sure to understand your answer. Do you mean I should do this : //does not display the texture osg::StateSet* stateset = HUD_camera-getOrCreateStateSet(); osg::ref_ptrosg::Texture2D lm = new osg::Texture2D; stateset-setTextureAttributeAndModes( 0,map); lm-setImage(map-getImage()); stateset-setTextureAttributeAndModes( 0,lm); Seems quite odd to me. Cheers, Gaëtan[/quote] -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=54503#54503 ___ 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
