[osg-users] Regarding autoTransform disappering while zooming in and out
I am facing the weird issue with the auto-transform. I have two
auto-transforms one having text and other having the
Icon. I put both the transforms in the switch node and based on the mode
like
Icon
Text
Icon_text
I am switching the state of the switch node. But when I try to zoom in/zoom
out 5-6 times icon and the text
Is getting disappeared. Sometimes when I go close to the node it comes and
sometimes it doesn't come at all
This is my code for getting the icon Transform
if(!_iconTransform.valid())
{
_iconTransform = new osg::AutoTransform();
_iconTransform-setAutoScaleToScreen(true);
_iconTransform-setAutoRotateMode(osg::AutoTransform::ROTATE_TO_SCREEN);
_iconCullCallback = new indiUtil::IconCullCallback();
_iconTransform-setCullCallback(_iconCullCallback.get());
_iconTransform-setDataVariance(osg::Object::DYNAMIC);
if(_mode == ICON || _mode == ICON_AND_TEXT)
{
_switchNode-addChild(_iconTransform.get(), true);
}
else
{
_switchNode-addChild(_iconTransform.get(), false);
}
}
return _iconTransform.get();
This is my code for the text transform
if(!_textTransform.valid())
{
_textTransform = new osg::AutoTransform();
_textTransform-setAutoScaleToScreen(true);
_textTransform-setAutoRotateMode(osg::AutoTransform::ROTATE_TO_SCREEN);
_textTransform-setCullCallback(new
indiUtil::IconCullCallback());
_intializeText();
if(_textTransform.get() _textGeode.get())
{
_textTransform-addChild(_textGeode);
if(_mode == IRepresentation::TEXT || _mode ==
IRepresentation::ICON_AND_TEXT)
_switchNode-addChild(_textTransform.get(), true);
else
_switchNode-addChild(_textTransform.get(), false);
_placeTextNode();
}
}
return _textTransform.get();
I tried a lot but not able to find out the reason. I thought it may be
bacause of the cullback that I installed but even when I am removing it, I
am getting the same issue.
Please help me out !!!
With Regards
Abhinav Goyal
___
osg-users mailing list
osg-users@lists.openscenegraph.org
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Regarding autoTransform disappering while zooming in and out
Hi Abhinav, My guess is that the repeated rescaling is making the lower transform smaller and smaller until it get culled by small feature culling. Could you try disabling small feature culling, or alternatively avoid nesting auto transforms which would be my preference. Please note that osgText::Text has it's own scaling and rotation to screen coords functionality. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Invert scene graph
Hi Stéphane, I think if you invert the matrices when you are doing backward kinematics, you can keep the same scenegraph structure. For example, when the end effector is attached, you have the transform from P3 to P2 but you have P2 ipo P2, so the inverse of the transform you have is what you should set the PAT transform to. Hope this helps, Bryan Thrall Hi Bryan, Thanks a lot for your quick reply. In fact I wanted to keep the benefit of having a scene graph structure when applying a transform to the different nodes. That is, if I move one node the transform will be propagated automatically to its children. My goal would have been to have two kinematic chains (direct and inverse) automatically managed by the scene graph structure. Otherwise I would have to manually propagate the transform for the inverse chain. For example if P1 ipo P2 ipo P3 (direct kinematic chain) and I would like to consider the inverse kinematic chain (P3 is fixed), applying a transform to P2 should only move P1. But in this case I would need to cancel the transform applied to P3 and propagate it to P1. That would definitely be an option but it seems to me a bit complicated considering the great opportunity given by the graph structure. I will still try to find a solution using dynamic parenting but I will consider your solution as a backup plan. Thanks again for your suggestion! Best, Stéphane -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50311#50311 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Video textures on iOS (and audio)
hi ! any results in using OSG to play videos on IOS ? using ffmpeg is not an option ? cheers, bruno -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50361#50361 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Video textures on iOS (and audio)
Hi I have some working code playing a video inside OSG, it's IOS 6 only and needs some porting to the osg-plugin-mechanism and some other enhancements. I am currently busy with other work, so this has to wait for some more time. cheers, Stephan Am 01.10.12 15:58, schrieb Bruno Ronzani: hi ! any results in using OSG to play videos on IOS ? using ffmpeg is not an option ? cheers, bruno -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50361#50361 ___ 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] Video textures on iOS (and audio)
Steph, Thank you ! Can't wait to see that :) Please keep us informed ! Cheers, Bruno -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50364#50364 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] How to select or pick an object in OSG, in file .osg using osgviewer pick.osg?
Hi, I am using this example OpenSceneGraph/examples/osgpick/osgpick.cpp, I changed and I added new keys and mouse actions, to test the program osgpick.cpp in Osgviewer and the program improved. Then I wrote a file .osg to use it on Osgviewer, but I can't run my new actions because Osgviewer blocks all keyboard and my new keys to use your own keyboard and mouse actions. But I see that I can't make this with the .osgfile because it isn't an application and can't be used in Osgviewer my own actions, right?. This means that my problem has no solution? Thank you! Cheers, Kleber -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50365#50365 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] getting RGB of texture in *.ive file
Hello,
I have a large terrain map which I load from an *.osg file containing a list of
ProxyNode objects containing *.ive files, using osgDB::readNodeFile.
My end goal is to get RGB of points on the texture map found through a line
segment intersection.
I have read through the mousePosition function in the InteractiveImageHandler
class which shows how I would get the texture coordinates of the point
intersected.
From there, I attempted to get the RGB value this way:
Code:
osg::Drawable * drawable = intersection.drawable.get();
if(drawable-getStateSet())
{
state_set = drawable-getStateSet();
osg::Texture * texture =
dynamic_castosg::Texture*(state_set-getTextureAttribute
(0, osg::StateAttribute::TEXTURE));
if(texture)
{
textureImage = texture-getImage(osg::Material::FRONT);
return textureImage-getColor(textureCoordinates);
}
}
This snippet produces a valid drawable, however the drawable returns a NULL
stateset and so I can't obtain the texture object.
How can I obtain the osg::Image to get RGB in this case? Or, is there a better
method?
Thanks-
--
Read this topic online here:
http://forum.openscenegraph.org/viewtopic.php?p=50366#50366
___
osg-users mailing list
osg-users@lists.openscenegraph.org
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] getting RGB of texture in *.ive file
Joe Doob wrote on 2012-10-01: This snippet produces a valid drawable, however the drawable returns a NULL stateset and so I can't obtain the texture object. How can I obtain the osg::Image to get RGB in this case? Or, is there a better method? The texture for the Drawable must be set in a parent node (the Geode that contains it, or possibly some Node higher in the scene graph). You can use osg::Drawable::getParents() to work your way up the scene graph until you find the StateSet that sets the texture. Note that OSG combines StateSets, so even if you find a StateSet it might not specify the texture; it all depends on how the model is structured. Also, that part of the scene graph could occur multiple times in the scene graph if it is instanced (which is why getParents() returns a list: there could be more than one parent). Hope this helps, -- Bryan Thrall Principal Software Engineer FlightSafety International bryan.thr...@flightsafety.com ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Problem with picking and AutoTransforms
Hi, I am having difficulties picking an object that is attached to an AutoTransform. My object is made out of two lines, in a shape of an 'x' with AutoScaleToScreen = true AutoRotateMode = NO_ROTATION I am using a polytope intersector (LIMIT_ONE_PER_DRAWABLE) to intersect with the lines of my object. The intersector reports an intersection only if I click on the center of my object. If I click on the object's lines away from the center, no intersection is reported for the object. Can anyone think of a reason why this can happen? Thank you! Ron -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50368#50368 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Problem with picking and AutoTransforms
by the way, I just noticed that if I set the AutoTransform to ROTATE_TO_SCREEN the problem goes away :O. But I need it with NO_ROTATION ... Cheers, Ron -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=50369#50369 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Manually updating a camera instead of using a manipulator
Figured this out; I was unprojecting coordinates but not updating them
in the right order. So that this thread isn't completely useless, here's my
correct code for converting screen coordinates to world coordinates.
void calcNormDeviceCoords(int xScreen, int yScreen, double xNorm,
double yNorm)
{
xNorm = 2*double(xScreen)/double(MY_SCREEN_WIDTH) - 1;
yNorm = 1 - 2*double(yScreen)/double(MY_SCREEN_HEIGHT);
}
// dNorm = 0.0 for near plane on view frustum, dNorm = 1.0 for far plane
void convCoordScreenToWorld(double xNorm,double yNorm,
double dNorm,osg::Vec3d worldPt)
{
osg::Camera * viewCam = MY_VIEWER-getCamera();
osg::Matrixd xfMVP(viewCam-getViewMatrix()*
viewCam-getProjectionMatrix());
osg::Matrixd xfInvMVP = osg::Matrixd::inverse(xfMVP);
worldPt = osg::Vec3d(xNorm,yNorm,dNorm) * xfInvMVP;
}
Sorry for the spam
Preet
___
osg-users mailing list
osg-users@lists.openscenegraph.org
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
