[osg-users] ComputeBoundsVisitor problem
Hi osg-users!
I want to use a ComputeBoundsVisitor for finding the bounds of an object. The
object belongs to the class GroundObject, which is derived from osg::Node.
Please have a look at this short function. The visitor is probably not
executed, and the resulting bounding box is not valid.
void GroundObject::calculateDistanceToGround(void)
{
// Calculate distance from local origin to ground.
osg::ComputeBoundsVisitor cbv;
accept(cbv);
osg::BoundingBox box = cbv.getBoundingBox();
if (!box.valid()) ssPrintf(Bounding box is not valid!\n);
_distanceToGround = osg::absolute(box.zMin());
}
What is wrong here?
Thanks in advance,
Åsa Engvall
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Re: [osg-users] ComputeBoundsVisitor problem
ComputeBoundsVisitor only computes bounds for drawables. ie geometry.
2009/2/11 Engvall Åsa asa.engv...@saabgroup.com:
Hi osg-users!
I want to use a ComputeBoundsVisitor for finding the bounds of an object.
The object belongs to the class GroundObject, which is derived from
osg::Node.
Please have a look at this short function. The visitor is probably not
executed, and the resulting bounding box is not valid.
void GroundObject::calculateDistanceToGround(void)
{
// Calculate distance from local origin to ground.
osg::ComputeBoundsVisitor cbv;
accept(cbv);
osg::BoundingBox box = cbv.getBoundingBox();
if (!box.valid()) ssPrintf(Bounding box is not valid!\n);
_distanceToGround = osg::absolute(box.zMin());
}
What is wrong here?
Thanks in advance,
Åsa Engvall
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Re: [osg-users] ComputeBoundsVisitor problem
Yes, but I was expecting that the visitor should traverse the graph an find the
geometry that is below the GroundObject. If I do the same thing on an
osg::Node, it works. Both the Node and the GroundObject are created using
readNodeFile.
Åsa
-Ursprungligt meddelande-
Från: osg-users-boun...@lists.openscenegraph.org
[mailto:osg-users-boun...@lists.openscenegraph.org] För Simon Hammett
Skickat: den 11 februari 2009 12:51
Till: OpenSceneGraph Users
Ämne: Re: [osg-users] ComputeBoundsVisitor problem
ComputeBoundsVisitor only computes bounds for drawables. ie geometry.
2009/2/11 Engvall Åsa asa.engv...@saabgroup.com:
Hi osg-users!
I want to use a ComputeBoundsVisitor for finding the bounds of an object.
The object belongs to the class GroundObject, which is derived from
osg::Node.
Please have a look at this short function. The visitor is probably not
executed, and the resulting bounding box is not valid.
void GroundObject::calculateDistanceToGround(void)
{
// Calculate distance from local origin to ground.
osg::ComputeBoundsVisitor cbv;
accept(cbv);
osg::BoundingBox box = cbv.getBoundingBox();
if (!box.valid()) ssPrintf(Bounding box is not valid!\n);
_distanceToGround = osg::absolute(box.zMin()); }
What is wrong here?
Thanks in advance,
Åsa Engvall
___
osg-users mailing list
osg-users@lists.openscenegraph.org
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.
org
--
The truth is out there. Usually in header files.
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Re: [osg-users] ComputeBoundsVisitor problem
I take it GroundObject is your own class that acts as a container.
Have you implemented the traverse method?
2009/2/11 Engvall Åsa asa.engv...@saabgroup.com:
Yes, but I was expecting that the visitor should traverse the graph an find
the geometry that is below the GroundObject. If I do the same thing on an
osg::Node, it works. Both the Node and the GroundObject are created using
readNodeFile.
Åsa
-Ursprungligt meddelande-
Från: osg-users-boun...@lists.openscenegraph.org
[mailto:osg-users-boun...@lists.openscenegraph.org] För Simon Hammett
Skickat: den 11 februari 2009 12:51
Till: OpenSceneGraph Users
Ämne: Re: [osg-users] ComputeBoundsVisitor problem
ComputeBoundsVisitor only computes bounds for drawables. ie geometry.
2009/2/11 Engvall Åsa asa.engv...@saabgroup.com:
Hi osg-users!
I want to use a ComputeBoundsVisitor for finding the bounds of an object.
The object belongs to the class GroundObject, which is derived from
osg::Node.
Please have a look at this short function. The visitor is probably not
executed, and the resulting bounding box is not valid.
void GroundObject::calculateDistanceToGround(void)
{
// Calculate distance from local origin to ground.
osg::ComputeBoundsVisitor cbv;
accept(cbv);
osg::BoundingBox box = cbv.getBoundingBox();
if (!box.valid()) ssPrintf(Bounding box is not valid!\n);
_distanceToGround = osg::absolute(box.zMin()); }
What is wrong here?
Thanks in advance,
Åsa Engvall
___
osg-users mailing list
osg-users@lists.openscenegraph.org
http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.
org
--
The truth is out there. Usually in header files.
___
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--
The truth is out there. Usually in header files.
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