[osg-users] Floating point FBO Instancing texture
Hi all,
I'm instancing geometry using a floating point texture containing
worldspace positions. The position texture and instancing work.
Resolution is constant at 1024x768
Now I'm trying to use a FBO (pre-render) to write to a position texture
and use that in the instancing shader (It will later be used for
updating positions)
It doesn't work..
I'm using the exact same data in the FBO texture cos I'm passing the
original floating point texture into the fbo shader and setting
gl_FragData[0]. The instance shaders are simple and take the FBO texture.
I am not familiar with fbo's. Should I set the RTT camera with a scene?
is there another way to write to images using shaders without fbo's?
I'm calling dirty() on the image with a callback (not sure if necessary
with FBO)
Have included code below for the main setup and important shader fbo pass.
Thanks for any help..
P
vertex
--
passthrough vert shader
fragment
#version 400 compatibility
uniform sampler2D positionTexture;
uniform float time;
void main(void)
{
vec4 position = texture2D(positionTexture, gl_TexCoord[0].xy);
gl_FragData[0] = position;
}
Main setup:
---
positionimage = create2DImage(Positions.tiff);
updatepositionimage = create2DImage(Positions.tiff);
//Textures used in
positionTexture = createFloatTexture(positionimage-s(),
positionimage-t());
newPositionTexture = createFloatTexture(updatepositionimage-s(),
updatepositionimage-t());
rttCamera = createRTTCamera( positionimage-s(), positionimage-t());
//Textures sent to the instancing shader
rttCamera-attach( osg::Camera::COLOR_BUFFER0, positionTexture );
rttCamera-attach( osg::Camera::COLOR_BUFFER1, directionTexture);
rttCamera-addChild( scene );
Creating RTT Camera:
-
osg::Camera* createRenderTTCamera( int width, int height )
{
osg::ref_ptrosg::Camera camera = new osg::Camera;
camera-setClearColor( osg::Vec4(0.5,0.5,0.5,1.0) );
camera-setClearMask( GL_COLOR_BUFFER_BIT|GL_DEPTH_BUFFER_BIT );
camera-setRenderTargetImplementation(
osg::Camera::FRAME_BUFFER_OBJECT );
camera-setRenderOrder( osg::Camera::PRE_RENDER );
camera-setViewport( 0, 0, width, height);
return camera.release();
}
Creating FBO texture:
-
osg::Texture2D* createFBOFloatTexture(unsigned int width, unsigned int
height)
{
osg::ref_ptrosg::Texture2D texture = new osg::Texture2D;
texture-setTextureSize( width, height );
texture-setDataVariance(osg::Object::DYNAMIC);
texture-setWrap(osg::Texture2D::WRAP_S, osg::Texture2D::REPEAT);
texture-setWrap(osg::Texture2D::WRAP_T, osg::Texture2D::REPEAT);
texture-setFilter(osg::Texture2D::MIN_FILTER,osg::Texture2D::NEAREST);
texture-setFilter(osg::Texture2D::MAG_FILTER,osg::Texture2D::NEAREST);
texture-setInternalFormat( GL_RGBA32F_ARB );
texture-setSourceFormat( GL_RGBA );
texture-setSourceType( GL_FLOAT );
texture-setResizeNonPowerOfTwoHint(false);
return texture.release();
}
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Re: [osg-users] Composite Viewer framerate multiple cameras on large data
HI Nick, What type of frame rate do you get when running on a single window vs multiple windows? What do the frame stats suggest for what is the bottleneck? Sharing context won't help as it'll force you to use single threaded viewer. There might be other routes though, so as just using one context with mulitple viewports on it so you can still have your multiple views. Robert. On 1 April 2014 19:05, Nick Modly modly.n...@gmail.com wrote: Hi, I have a scene graph set up with a large dataset ( A Geocentric Earth from osgEarth). In my composite viewer, I want to have multiple viewpoints (with separate camera manipulators/projection matrices; ie. an Orthographic, perspective, etc) each within a QT widget. I got this set up the way I wanted it by following the osgViewerQt example, using the CullDrawThreadPerContext threading model, but the framerate is pretty low. Are there any tricks I can do to improve the performance? Sharing graphics contexts, etc? Thank you! Cheers, Nick -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=58772#58772 ___ 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
[osg-users] Easy blur effect with HUD Camera?
Hi, I would like to make something like menu using overlaying HUD Camera with background blurred. Code: http://rk.md/wp-content/uploads/2012/08/2012-08-18_4.jpg - something like this but with sharp / focused scoreboard but everything else blurred How to do it? I tried osgmotionblur example with these opengl hacks but the problem is that if I don't use dedicated GPU (Nvidia) and using integrated Intel GPU then there is no blur effect but many OpenGL errors. So, Is there any easier method/hack to make the background blurry or blurry-like? Pictures: before Code: http://imgur.com/EII7vZG,IUz5wAa after (using Photoshop Gaussian blur ) Code: http://imgur.com/EII7vZG,IUz5wAa#1 Thank you! Cheers, Petr -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=58775#58775 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Easy blur effect with HUD Camera?
Hi Petr, You will have to render your scene to texture (RTT) and perform a shader-blur pass before displaying it in the viewer. Look at the render to texture example and the shader examples. Finding a blur shader should be easy with most search websites, or in the osgPPU examples. So effectively: 1. Render scene to Texture1 2. Run blur pass on Texture1 and display Result in Framebuffer or write to Texture2 3. If Framebuffer - draw hud above, else draw Fullscreen-Quad with Texture2 and draw HUD afterwards This will also work on Intel cards with OpenGL 2.0 (i even think it is possible on 1.5) Hi, I would like to make something like menu using overlaying HUD Camera with background blurred. Code: http://rk.md/wp-content/uploads/2012/08/2012-08-18_4.jpg - something like this but with sharp / focused scoreboard but everything else blurred How to do it? I tried osgmotionblur example with these opengl hacks but the problem is that if I don't use dedicated GPU (Nvidia) and using integrated Intel GPU then there is no blur effect but many OpenGL errors. So, Is there any easier method/hack to make the background blurry or blurry-like? Pictures: before Code: http://imgur.com/EII7vZG,IUz5wAa after (using Photoshop Gaussian blur ) Code: http://imgur.com/EII7vZG,IUz5wAa#1 Thank you! Cheers, Petr -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=58775#58775 ___ 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
[osg-users] GeometryTechnique and texture coordinates
Hi, I have geocentric dataset (which is already compiled with osgDEM) and I'm facing an issue. In my shaders I rely on valid texture coordinates for tangentSpace generation and various other effects like detail-splatting. Unfortunately (and quite obvious due to performance restrictions) the GeometryTechnique will not create texture coordinates for Terrain tiles without textures. Due to missing LandSat-data at this areas, there are no images for those areas. (see around line 484 in GeometryTechnique.cpp) I wonder if there are any other options than a) modifying the VertexNormalGenerator::populateCenter function to create texture coordinates anyways b) Overriding the GeometryTechnique to use a custom VertexNormalGenerator which clones the functionality of the original one + adding texture coordinates for tiles without ImageLayer. Since the dataset is quite big, so recompiling it is out of the question right now. Also it would be a performance killer to traverse the TerrainTile manually and re-add some fake image layer. My idea would be to change the vertexNormalGenerator to optionally create texture coordinates. But I don't have an idea yet how to get this option into it. Any hints, ideas? ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] GeometryTechnique and texture coordinates
Hi Sebastian, osgTerrain is designed to allow you to override the TerrainTechnique attached to the TerrainTile via the Terrain node that can be used to decorate the terrain. The Terrain::setTerrainTechniquePrototype(TerrainTechinque*) is used to set the TerrainTechnique that tiles should use. By default osgTerrain will use the GeometryTechnique but you provide your own implementation or subclass from GeometryTechnique. Robert. On 2 April 2014 15:38, Sebastian Messerschmidt sebastian.messerschm...@gmx.de wrote: Hi, I have geocentric dataset (which is already compiled with osgDEM) and I'm facing an issue. In my shaders I rely on valid texture coordinates for tangentSpace generation and various other effects like detail-splatting. Unfortunately (and quite obvious due to performance restrictions) the GeometryTechnique will not create texture coordinates for Terrain tiles without textures. Due to missing LandSat-data at this areas, there are no images for those areas. (see around line 484 in GeometryTechnique.cpp) I wonder if there are any other options than a) modifying the VertexNormalGenerator::populateCenter function to create texture coordinates anyways b) Overriding the GeometryTechnique to use a custom VertexNormalGenerator which clones the functionality of the original one + adding texture coordinates for tiles without ImageLayer. Since the dataset is quite big, so recompiling it is out of the question right now. Also it would be a performance killer to traverse the TerrainTile manually and re-add some fake image layer. My idea would be to change the vertexNormalGenerator to optionally create texture coordinates. But I don't have an idea yet how to get this option into it. Any hints, ideas? ___ 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] GeometryTechnique and texture coordinates
Hi Robert, Thanks for the quick response. This means a lot of code duplication and I guess I will have to traverse every tile for Terrain nodes. I'll check it and see how it works out. cheers Sebastian Hi Sebastian, osgTerrain is designed to allow you to override the TerrainTechnique attached to the TerrainTile via the Terrain node that can be used to decorate the terrain. The Terrain::setTerrainTechniquePrototype(TerrainTechinque*) is used to set the TerrainTechnique that tiles should use. By default osgTerrain will use the GeometryTechnique but you provide your own implementation or subclass from GeometryTechnique. Robert. On 2 April 2014 15:38, Sebastian Messerschmidt sebastian.messerschm...@gmx.de mailto:sebastian.messerschm...@gmx.de wrote: Hi, I have geocentric dataset (which is already compiled with osgDEM) and I'm facing an issue. In my shaders I rely on valid texture coordinates for tangentSpace generation and various other effects like detail-splatting. Unfortunately (and quite obvious due to performance restrictions) the GeometryTechnique will not create texture coordinates for Terrain tiles without textures. Due to missing LandSat-data at this areas, there are no images for those areas. (see around line 484 in GeometryTechnique.cpp) I wonder if there are any other options than a) modifying the VertexNormalGenerator::populateCenter function to create texture coordinates anyways b) Overriding the GeometryTechnique to use a custom VertexNormalGenerator which clones the functionality of the original one + adding texture coordinates for tiles without ImageLayer. Since the dataset is quite big, so recompiling it is out of the question right now. Also it would be a performance killer to traverse the TerrainTile manually and re-add some fake image layer. My idea would be to change the vertexNormalGenerator to optionally create texture coordinates. But I don't have an idea yet how to get this option into it. Any hints, ideas? ___ osg-users mailing list osg-users@lists.openscenegraph.org mailto: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 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] GeometryTechnique and texture coordinates
On 2 April 2014 15:55, Sebastian Messerschmidt sebastian.messerschm...@gmx.de wrote: Hi Robert, Thanks for the quick response. This means a lot of code duplication and I guess I will have to traverse every tile for Terrain nodes. No, the design is meant that your just assign your custom TerrainTechnique to the Terrain node that decorates the terrain scene graph. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] osgLeap Leap Motion Integration
Hi Mathieu, nice to hear you find osgLeap useful. Please make a zip of all osgLeap files you checked out including all changed. I will make a diff to check for changes. What version/revision did you check out and what were the difficulties you had? Thank you! Cheers, Johannes -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=58782#58782 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Easy blur effect with HUD Camera?
If you're not picky about the blur quality, just render to a texture that is 1/16th the size of your screen (1/4 width x 1/4 height), then apply the texture to a fullscreen quad with GL_LINEAR filtering. This can be accomplished with OpenGL v1.0 functionality and should be fast and well-supported on all graphics cards. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
