[osg-users] how to move a sphere
Hi All, I need to move an osg::Sphere. I tried with setCenter() in vain. Looking around I didn't found a solution to redraw the sphere. Isn't there a solution different from attaching a PositionAttutudeTransform (or something like that) as parent of the Drawable and modify then the transformation instead of the sphere center? Regards, Gianni -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=61862#61862 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] how to move a sphere
HI Gianni, How to go about it will depend upon what you are trying to achieve with your application. At the most basic level it's likely that the ShadpeDrawable has created a display list and you aren't calling dirty to force it rebuild it after the change in settings to the osg::Sphere, try calling shapedrawable-dirtyDisplayList(); after you update the Sphere. While this might fix the immediate problem, it may well be that ShapeDrawable/Sphere isn't at all the right tool for the problem you are trying to solve. ShapeDrawable is really just a very simple way of visualizing the primitive osg::Shape objects. These osg::Shape exist to support collision detection/physics that end users may want to layer on top of the OSG - this is why you can assign them to osg::Drawable, as they can form a more accurate representation of an object than the simple BoundingBox that is used for view frustum culling. The ShapeDrawable was really just intended to help debug and for very simple vis tasks, not as a general purpose visualization tool. The most efficient way to create data for visualization is using osg::Geometry where proper OpenGL fast paths can be used so you can get the best performance and full control over the whole spectrum of vertex attributes that you don't have with ShapeDrawable/Shape. If you have large number of sphere objects you may also want to start looking at point sprites or geometry instancing. Robert. Robert. On 26 November 2014 at 08:40, Gianni Ambrosio g.ambrosio+...@gmail.com wrote: Hi All, I need to move an osg::Sphere. I tried with setCenter() in vain. Looking around I didn't found a solution to redraw the sphere. Isn't there a solution different from attaching a PositionAttutudeTransform (or something like that) as parent of the Drawable and modify then the transformation instead of the sphere center? Regards, Gianni -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=61862#61862 ___ 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] how to move a sphere
Thank you very much for the clarifications and suggestions. Gianni -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=61865#61865 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Improving this scene frame rate
Ok, I fix the problem of the original characters. I did not notice that the geometry node was inside the skeleto node, so when I add the skeleton into the scene the original models was loaded. My solution is this: Code: osg::ref_ptrosgAnimation::Skeleton skelroot = new osgAnimation::Skeleton; skelroot-setDefaultUpdateCallback(); skelroot-addChild(dynamic_castosgAnimation::Bone*(finder._root.get()-getChild(1))); builder-setSkeleton(skelroot.get()); Now I have the same scene of characters, with deformed movements, without models loaded in the 0,0,0. The improvement with the hardware instances relative to the first version is very noticeable. Any idea why the animations are wrong? Thanks! -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=61866#61866 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] I love openscenegraph
hello,,I love openscenegraph!!___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Multiple render targets not working.
I (sort of) solved the problem. I re-implemented the camera system according the Cookbook chapter 6 (which I only used partially the previous time) and frame buffer objects and multiple render targets worked. It was a combination of wrong camera settings and scene hierarchy. Although I did run into the problem again that screen resizing did not work and it requires a complete re-creation of the RTT camera's every time, while with my previous setup I only had to rescale the textures and viewports. Additionally for some reason the entities of the scene are in the wrong location compared to the spherical earth (from osgEarth). Since I already have spent too much time on this I will stick with the old setup for now and maybe come back to it some other time. Thanks for the help. Cheers, Sander -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=61869#61869 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] setUseVertexBufferObjects(true) not effective after loading objects
Hi,
I wrote the following little node visitor to switch part of a scene graph
from using display lists to using VBOs.
class VBOVisitor : public osg::NodeVisitor
{
public:
VBOVisitor()
{
setTraversalMode(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN);
}
virtual void apply(osg::Node node)
{
osg::Geode *geode = node.asGeode();
if (geode != NULL)
{
for (unsigned int i = 0; i geode-getNumDrawables(); i++)
{
osg::Drawable drawable = *geode-getDrawable(i);
drawable.setUseDisplayList(false);
drawable.setUseVertexBufferObjects(true);
}
}
traverse(node);
}
};
I use it like this before attaching the object to the Viewer and rendering
it.
osg::Node *object = osgDB::readNodeFile(some_object.osg);
VBOVisitor vbo;
object-accept(vbo);
The OSG file in question contains a lot of Drawbles with the flags
useDisplayList TRUE
useVertexBufferObjects FALSE
This prevents advanced rendering techniques such as hardware instancing.
The idea was to use the VBOVisitor to get the same effect as if I had
changed these lines to
useDisplayList TRUE
useVertexBufferObjects FALSE
Editing the OSG file manually works, but using the VBOVisitor instead does
not produce the desired effect (i.e. hardware instancing fails)
What am I missing?
Christian
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Re: [osg-users] setUseVertexBufferObjects(true) not effective after loading objects
Hi,
above node visitor is actually working. I just happened to edit a .cpp file
of same name, but belonging to a different project. Hence my changes never
had any effect. ;-)
Christian
2014-11-26 15:29 GMT+01:00 Christian Buchner christian.buch...@gmail.com:
Sorry, the second block of flags in my posting should have said this:
useDisplayList FALSE
useVertexBufferObjects TRUE
2014-11-26 15:28 GMT+01:00 Christian Buchner christian.buch...@gmail.com
:
Hi,
I wrote the following little node visitor to switch part of a scene graph
from using display lists to using VBOs.
class VBOVisitor : public osg::NodeVisitor
{
public:
VBOVisitor()
{
setTraversalMode(osg::NodeVisitor::TRAVERSE_ALL_CHILDREN);
}
virtual void apply(osg::Node node)
{
osg::Geode *geode = node.asGeode();
if (geode != NULL)
{
for (unsigned int i = 0; i geode-getNumDrawables(); i++)
{
osg::Drawable drawable = *geode-getDrawable(i);
drawable.setUseDisplayList(false);
drawable.setUseVertexBufferObjects(true);
}
}
traverse(node);
}
};
I use it like this before attaching the object to the Viewer and
rendering it.
osg::Node *object = osgDB::readNodeFile(some_object.osg);
VBOVisitor vbo;
object-accept(vbo);
The OSG file in question contains a lot of Drawbles with the flags
useDisplayList TRUE
useVertexBufferObjects FALSE
This prevents advanced rendering techniques such as hardware instancing.
The idea was to use the VBOVisitor to get the same effect as if I had
changed these lines to
useDisplayList TRUE
useVertexBufferObjects FALSE
Editing the OSG file manually works, but using the VBOVisitor instead
does not produce the desired effect (i.e. hardware instancing fails)
What am I missing?
Christian
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Re: [osg-users] [osgPlugins] ffmpeg plugin halting during playback of some videos
As this issue effects a large number of videos and is important functionality for us, we're willing to pay someone for a fix. If interested, please contact j...@digitaliseducation.com. Thanks, Trystan -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=61876#61876 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Problem with osgText???
Hi, I was faced with the following problem. On the stage there are several osgText. I need to text disappeared when the point to which I add it is not visible on the stage or overlaps another object. I can not find a solution to the problem ety. Thank you! Cheers, Alex -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=61879#61879 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] [vpb] Unusual Error while running vpbmaster
Hi, I keep getting this unusual error message when running the vpb Master. I'm pretty sure there is no such file, and i couldn't google it because this file doesn't seem to exist at all. This is my error: FindFileInPath() : trying /usr/lib/osgPlugins-3.2.1/osgdb_source.so ... itr='/usr/lib64/' FindFileInPath() : trying /usr/lib64/osgPlugins-3.2.1/osgdb_source.so ... itr='/usr/local/lib/' FindFileInPath() : trying /usr/local/lib/osgPlugins-3.2.1/osgdb_source.so ... itr='/usr/local/lib64/' FindFileInPath() : trying /usr/local/lib64/osgPlugins-3.2.1/osgdb_source.so ... itr='/home/linux/OpenSceneGraph/lib/' FindFileInPath() : trying /home/linux/OpenSceneGraph/lib/osgdb_source.so ... itr='/home/linux/VirtualPlanetBuilder/lib/' FindFileInPath() : trying /home/linux/VirtualPlanetBuilder/lib/osgdb_source.so ... itr='/usr/local/lib64/osgPlugins-3.2.1' FindFileInPath() : trying /usr/local/lib64/osgPlugins-3.2.1/osgdb_source.so ... itr='/usr/lib/' FindFileInPath() : trying /usr/lib/osgdb_source.so ... itr='/usr/lib64/' FindFileInPath() : trying /usr/lib64/osgdb_source.so ... itr='/usr/local/lib/' FindFileInPath() : trying /usr/local/lib/osgdb_source.so ... itr='/usr/local/lib64/' FindFileInPath() : trying /usr/local/lib64/osgdb_source.so ... Warning: dynamic library 'osgPlugins-3.2.1/osgdb_source.so' does not exist (or isn't readable): osgPlugins-3.2.1/osgdb_source.so: cannot open shared object file: No such file or directory DynamicLibrary::failed loading osgPlugins-3.2.1/osgdb_source.so No data loaded Second attempt to load source file build_master.source also failed. I hope someone can help me! Thank you in advance!! Cheers, Peter[/quote][/code] -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=61557#61557 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Vec3Array maximum size?
Hi all,
i want to draw a bunch of vertices into my scene, using Openscenegraph 3.3.1.
Therefore, i oriented towared the createBase-function from the Animate-example.
Now if i have a small Vec3Array everything is fine (see first picture 1), but
if the numTilesX and numTilesY (see code) are both set to 300, a very strange
thing happens (see picture 2).
What did i overlook?
Here is the code of the createBase-function used: (nothing except the values
for numTilesX and numTilesY was changed)
Code:
int numTilesX = 300;
int numTilesY = 300;
float width = 2*radius;
float height = 2*radius;
osg::Vec3 v000(center - osg::Vec3(width*0.5f,height*0.5f,0.0f));
osg::Vec3 dx(osg::Vec3(width/((float)numTilesX),0.0,0.0f));
osg::Vec3 dy(osg::Vec3(0.0f,height/((float)numTilesY),0.0f));
// fill in vertices for grid, note numTilesX+1 * numTilesY+1...
osg::Vec3Array* coords = new osg::Vec3Array;
int iy;
for(iy=0;iy=numTilesY;++iy)
{
for(int ix=0;ix=numTilesX;++ix)
{
coords-push_back(v000+dx*(float)ix+dy*(float)iy);
}
}
//Just two colours - black and white.
osg::Vec4Array* colors = new osg::Vec4Array;
colors-push_back(osg::Vec4(1.0f,1.0f,1.0f,1.0f)); // white
colors-push_back(osg::Vec4(0.0f,0.0f,0.0f,1.0f)); // black
osg::ref_ptrosg::DrawElementsUShort whitePrimitives = new
osg::DrawElementsUShort(GL_QUADS);
osg::ref_ptrosg::DrawElementsUShort blackPrimitives = new
osg::DrawElementsUShort(GL_QUADS);
int numIndicesPerRow=numTilesX+1;
for(iy=0;iynumTilesY;++iy)
{
for(int ix=0;ixnumTilesX;++ix)
{
osg::DrawElementsUShort* primitives = ((iy+ix)%2==0) ? whitePrimitives.get() :
blackPrimitives.get();
primitives-push_back(ix +(iy+1)*numIndicesPerRow);
primitives-push_back(ix +iy*numIndicesPerRow);
primitives-push_back((ix+1)+iy*numIndicesPerRow);
primitives-push_back((ix+1)+(iy+1)*numIndicesPerRow);
}
}
// set up a single normal
osg::Vec3Array* normals = new osg::Vec3Array;
normals-push_back(osg::Vec3(0.0f,0.0f,1.0f));
osg::Geometry* geom = new osg::Geometry;
geom-setVertexArray(coords);
geom-setColorArray(colors, osg::Array::BIND_PER_PRIMITIVE_SET);
geom-setNormalArray(normals, osg::Array::BIND_OVERALL);
geom-addPrimitiveSet(whitePrimitives.get());
geom-addPrimitiveSet(blackPrimitives.get());
Thank you!
Cheers,
mfechter[/code][/quote]
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Re: [osg-users] Vec3Array maximum size?
Hi all, in the meantime i found the mistake: Code: osg::ref_ptrosg::DrawElementsUShort whitePrimitives = new osg::DrawElementsUShort(GL_QUADS); has to be Code: osg::ref_ptrosg::DrawElementsUInt whitePrimitives = new osg::DrawElementsUInt(GL_QUADS); because UShort only reaches from 0 .. 65535 :-* Cheers, mfechter -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=61880#61880 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Vec3Array maximum size?
Hi Max,
You are setting the limit yourself by using DrawElementsUShort. (Short
== 65536, so I guess it will be working to 255*255)
Use DrawElementsUInt.
The second limit you might be hitting is the GL_MAX_ELEMENTS_VERTICES if
glDrawArray is used.
Btw: What are you trying to achive? If you need a checkerboard you could
use texturing ;-)
Cheers
Sebastian
Hi all,
i want to draw a bunch of vertices into my scene, using Openscenegraph 3.3.1.
Therefore, i oriented towared the createBase-function from the Animate-example.
Now if i have a small Vec3Array everything is fine (see first picture 1), but
if the numTilesX and numTilesY (see code) are both set to 300, a very strange
thing happens (see picture 2).
What did i overlook?
Here is the code of the createBase-function used: (nothing except the values
for numTilesX and numTilesY was changed)
Code:
int numTilesX = 300;
int numTilesY = 300;
float width = 2*radius;
float height = 2*radius;
osg::Vec3 v000(center - osg::Vec3(width*0.5f,height*0.5f,0.0f));
osg::Vec3 dx(osg::Vec3(width/((float)numTilesX),0.0,0.0f));
osg::Vec3 dy(osg::Vec3(0.0f,height/((float)numTilesY),0.0f));
// fill in vertices for grid, note numTilesX+1 * numTilesY+1...
osg::Vec3Array* coords = new osg::Vec3Array;
int iy;
for(iy=0;iy=numTilesY;++iy)
{
for(int ix=0;ix=numTilesX;++ix)
{
coords-push_back(v000+dx*(float)ix+dy*(float)iy);
}
}
//Just two colours - black and white.
osg::Vec4Array* colors = new osg::Vec4Array;
colors-push_back(osg::Vec4(1.0f,1.0f,1.0f,1.0f)); // white
colors-push_back(osg::Vec4(0.0f,0.0f,0.0f,1.0f)); // black
osg::ref_ptrosg::DrawElementsUShort whitePrimitives = new
osg::DrawElementsUShort(GL_QUADS);
osg::ref_ptrosg::DrawElementsUShort blackPrimitives = new
osg::DrawElementsUShort(GL_QUADS);
int numIndicesPerRow=numTilesX+1;
for(iy=0;iynumTilesY;++iy)
{
for(int ix=0;ixnumTilesX;++ix)
{
osg::DrawElementsUShort* primitives = ((iy+ix)%2==0) ? whitePrimitives.get() :
blackPrimitives.get();
primitives-push_back(ix +(iy+1)*numIndicesPerRow);
primitives-push_back(ix +iy*numIndicesPerRow);
primitives-push_back((ix+1)+iy*numIndicesPerRow);
primitives-push_back((ix+1)+(iy+1)*numIndicesPerRow);
}
}
// set up a single normal
osg::Vec3Array* normals = new osg::Vec3Array;
normals-push_back(osg::Vec3(0.0f,0.0f,1.0f));
osg::Geometry* geom = new osg::Geometry;
geom-setVertexArray(coords);
geom-setColorArray(colors, osg::Array::BIND_PER_PRIMITIVE_SET);
geom-setNormalArray(normals, osg::Array::BIND_OVERALL);
geom-addPrimitiveSet(whitePrimitives.get());
geom-addPrimitiveSet(blackPrimitives.get());
Thank you!
Cheers,
mfechter[/code][/quote]
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http://forum.openscenegraph.org//files/50x50_153.jpg
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