[osg-users] Bug in Sequence.cpp
Hello,
I've encountered a bug in Sequence.cpp where the update function crashes
(OSG 3.1.2, VisualStudio 2005)
The problem is the _begin,_end in conjunction with the frameTime list.
If a setInterval is called with invalid values the update function will
determine an incorrect index into the _frameTime vector.
Now there are two questions how to fix this.
1. As I don't know the details about the sequence implementation I'm
wondering if the indices are put in correctly.
It seems that most of the flt-files insert a range of 1,1 and only
define one frame which later on will access the _frameTime[1].
The question here is, is the frame with number 1 really the index 1?
Maybe someone can help me out here, as I don't know the exact
specification for openflight.
2. I see two approaches here.
First is to fix the sequence numbers and insert begin-1 and end-1
instead of the original values.
Also there should be check before inserting, if the _frameNumber size is
sufficient. I additionally could add a runtime check before accessing
the _frameTime vector.
Second option is to look into the openflight importer. Maybe the problem
is here. Either the source file is not valid at this point, or the
importer is using the wrong indices.
So any opinions how to fix it?
This is the sequence in question:
Sequence {
name test
nodeMask 0x
cullingActive TRUE
defaultTime 1
frameTime {
0
}
lastFrameTime 0
interval LOOP 1 1
duration 1 -1
mode START
sync 0
clearOnStop 0
num_children 1
Geode {
DataVariance STATIC
name p3813
nodeMask 0x0
cullingActive TRUE
StateSet {
DataVariance STATIC
rendering_hint DEFAULT_BIN
renderBinMode INHERIT
GL_CULL_FACE ON
GL_LIGHTING ON
Use Material_4
Use CullFace_1
}
num_drawables 1
Geometry {
DataVariance STATIC
useDisplayList TRUE
useVertexBufferObjects FALSE
PrimitiveSets 1
{
DrawArrays QUADS 0 4
}
VertexArray Vec3Array 4
{
-2.04065 -7.8943 -5.90435
5.11647 -6.81152 -5.90435
2.69813 7.57828 -5.90601
-5.07137 5.89075 -5.90601
}
NormalBinding PER_VERTEX
NormalArray Vec3Array 4
{
-2.50113e-005 0.000115154 1
-2.50113e-005 0.000115154 1
-2.50113e-005 0.000115154 1
-2.50113e-005 0.000115154 1
}
ColorBinding OVERALL
ColorArray Vec4Array 1
{
1 1 1 1
}
}
}
}
cheers
Sebastian
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Re: [osg-users] Bug in Sequence.cpp
Okay,
The problem was in one of my visitors, that was setting the wrong indices.
Anyways, any objections introducing a check in the setInterval function?
cheers
Sebastian
Hello,
I've encountered a bug in Sequence.cpp where the update function
crashes (OSG 3.1.2, VisualStudio 2005)
The problem is the _begin,_end in conjunction with the frameTime list.
If a setInterval is called with invalid values the update function
will determine an incorrect index into the _frameTime vector.
Now there are two questions how to fix this.
1. As I don't know the details about the sequence implementation I'm
wondering if the indices are put in correctly.
It seems that most of the flt-files insert a range of 1,1 and only
define one frame which later on will access the _frameTime[1].
The question here is, is the frame with number 1 really the index 1?
Maybe someone can help me out here, as I don't know the exact
specification for openflight.
2. I see two approaches here.
First is to fix the sequence numbers and insert begin-1 and end-1
instead of the original values.
Also there should be check before inserting, if the _frameNumber size
is sufficient. I additionally could add a runtime check before
accessing the _frameTime vector.
Second option is to look into the openflight importer. Maybe the
problem is here. Either the source file is not valid at this point, or
the importer is using the wrong indices.
So any opinions how to fix it?
This is the sequence in question:
Sequence {
name test
nodeMask 0x
cullingActive TRUE
defaultTime 1
frameTime {
0
}
lastFrameTime 0
interval LOOP 1 1
duration 1 -1
mode START
sync 0
clearOnStop 0
num_children 1
Geode {
DataVariance STATIC
name p3813
nodeMask 0x0
cullingActive TRUE
StateSet {
DataVariance STATIC
rendering_hint DEFAULT_BIN
renderBinMode INHERIT
GL_CULL_FACE ON
GL_LIGHTING ON
Use Material_4
Use CullFace_1
}
num_drawables 1
Geometry {
DataVariance STATIC
useDisplayList TRUE
useVertexBufferObjects FALSE
PrimitiveSets 1
{
DrawArrays QUADS 0 4
}
VertexArray Vec3Array 4
{
-2.04065 -7.8943 -5.90435
5.11647 -6.81152 -5.90435
2.69813 7.57828 -5.90601
-5.07137 5.89075 -5.90601
}
NormalBinding PER_VERTEX
NormalArray Vec3Array 4
{
-2.50113e-005 0.000115154 1
-2.50113e-005 0.000115154 1
-2.50113e-005 0.000115154 1
-2.50113e-005 0.000115154 1
}
ColorBinding OVERALL
ColorArray Vec4Array 1
{
1 1 1 1
}
}
}
}
cheers
Sebastian
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[osg-users] change GraphicsWindowIOS
Hi, is it possible that I change inside without compiling OpenSceneGraph again, actually what am looking for us to make changes inside GraphicsWindowIOS to support transparent background or there is a better way for doing that ? Thank you! Cheers, Laith -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=49266#49266 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] [osgPlugins] flt: using Document::setSubSurfacePolygonOffset()
Hi, I want to use userdefined PolygonOffsets per subface-level. This seams to be possible with the method Document::setSubSurfacePolygonOffset(). But I didn't find any example how to use this method. Is it at all possible to use Document::setSubSurfacePolygonOffset() without changing the flt-Code itself? Can anybody help me? Thank you! Cheers, WeSee -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=49267#49267 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG Arrays and custom allocators?
Hi Paul,
2012/8/13 Paul Martz pma...@skew-matrix.com
Hi all --
There doesn't seem to be a way to use a custom allocator with an OSG Array
type. Is that correct, or have I missed something?
You're right
I have a large store of array data, and want to create a new instance of
an OSG Array that references that data store without invoking a data copy
or per-element constructor. The typical way to do this in C++ is with a
custom allocator, but as near as I can tell, OSG's Array types don't allow
an allocator as a template parameter.
If I can't use a custom allocator, does anyone have any ideas on how to
create an OSG Array that references a pre-allocated data store?
Any ideas would be appreciated, thanks.
.
OSG Array use an osg::MixinVectorT template that use a std::vector under
the hood.
I think to some solutions :
1) extend MixinVector template with a second parameter, the CustomAllocator
and pass it to the std::vector used in this template. Then extend
osg::TemplateArray in the same way.
change
typedef TemplateIndexArrayGLbyte,Array::ByteArrayType,1,GL_BYTE ByteArray;
in
template AllocT = defaultAlloc
class ByteArray :
public TemplateIndexArrayGLbyte,Array::ByteArrayType,1,GL_BYTE
{
...
};
Then adapt ArrayVisitor, ConstArrayVisitor and all dependency to accept a
template instead of a class
class ArrayVisitor
{
template AllocT = defaultAlloc
virtual void apply(ByteArrayAllocT) {}
...
};
Really big work, and there are some limitations (serialization for example).
(This could be more simple with C++11 new possibility)
2) Change osg::MixinVectorT in your custom OSG implementation then use
Allocator that you need
and create Vec3ArrayMyAlloc and other osg::Array with your allocator,
extend ArrayVisitor for your new
Arrays types, and so on for all Array's dependency that your code
require.
3) Change osg::MixinVectorT to don't use std::vector anymore (do the
vector stuff yourself)
and add in the public interface a function that allow user to change
Allocator of array element at runtime.
All element of the vector will be remove if you change the allocator to
avoid any memory corruption.
4) You probably already dig this solution but ...
If you can store your large store of array data in an std::vector,
then just do a std::swap between std::vector and osg::Array.
5) In the same way of 3) define a custom allocator that could change its
behaviours at runtime, but still use a std::vector.
templateclass ValueT
class MixinVector
{
typedef typename std::vectorValueT, MyAdaptableAllocator vector_type;
public:
...
};
Allocator could have a callback mechanism like
osg::Node/osg::NodeCallback.
You can do something like this in allocator to don't hurt performance
in default behaviours (with if/else optimization):
void MyAllocator::function()
{
if (callback == NULL)
do stuff
else
callback()
}
Anyway there are no really good solution...
HTH
David
--
-Paul Martz Skew Matrix Software
http://www.skew-matrix.com/
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Re: [osg-users] OSG Arrays and custom allocators?
Hi, Am 13.08.2012 18:07, schrieb Paul Martz: Hi all -- There doesn't seem to be a way to use a custom allocator with an OSG Array type. Is that correct, or have I missed something? I have a large store of array data, and want to create a new instance of an OSG Array that references that data store without invoking a data copy or per-element constructor. The typical way to do this in C++ is with a custom allocator, but as near as I can tell, OSG's Array types don't allow an allocator as a template parameter. If I can't use a custom allocator, does anyone have any ideas on how to create an OSG Array that references a pre-allocated data store? Maybe the osgsharedarray example can give you a hint. It is not using STL-style allocators but you can subclass an osg::Array. Any ideas would be appreciated, thanks. Hope this helps. Peter ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] [osgPPU] set new camera pointer
Hi Art I create a processor and units and hock to processor to the root scene node. Then as soon as the viewer is up, I set the processors camera pointer. Now in my application I have the feature of destroying the view and setting it up again (we use composite viewer). As soon as I set the processors camera to the new camera that belongs to the new view, I have a random checkerboard texture which is rendered. What is the correct procedure when the scene graph is not changed, neighter the ppus, but the viewer can be added and removed. How can I tell osgPPU to completely invalidate its resources? Thank you! Cheers, Daniel -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=49270#49270 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] change GraphicsWindowIOS
Hi Laith,
Can't you set the opaque-property of the gl-view' layer before realizing
the viewer? (Out of my head:)
osgViewer::GraphicsWindowIOS* win =
dynamic_castosgViewer::GraphicsWindowIOS*(your_context);
if (win) {
UIView* view = (UIView*)win-getView();
CALayer* layer = view.layer;
if (layer) layer.opaque = NO;
}
if this doesn't work I recommend adding a new flag to
osgViewer::GraphicsWindowIOS::WindowData and checking that flag from
inside GraphicsWindowIOS.
For the latter solution you'll have to recompile osg. And please submit
your changes to osg.submission or create a pull request for
https://github.com/stmh/osg/tree/iphone
HTH,
Stephan
Am 15.08.12 12:17, schrieb Laith Dhawahir:
Hi,
is it possible that I change inside without compiling OpenSceneGraph again,
actually what am looking for us to make changes inside GraphicsWindowIOS to
support transparent background or there is a better way for doing that ?
Thank you!
Cheers,
Laith
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http://forum.openscenegraph.org/viewtopic.php?p=49266#49266
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[osg-users] Problem using AutoTransform with LOD node
Hi, I am trying to create a scene for a CAD-type app where I have objects that should be a constant screen size as I zoom in and out, but when I cross a certain zoom threshold it should change to a different size (for example half its original size). I tried to implement this using a combination of AutoTransform and LOD nodes. Here is a sample graph of two objects: AutoTransform AutoTransform \ / LOD / \ MatrixTransform MatrixTransform \ / Geode The problem I have is that when I have the AutoTransforms set to autoScaleToScreen=true, then the level of detail does not change when it should. It always stays at whatever level it started at regardless of how much I move the camera in or out. If I set autoScaleToScreen to false, then the LOD behaves as I expect (meaning it changes when I move the camera from one range to another). What might be causing this to happen? Is there another way to get the effect I want? ... Thank you! Cheers, Michael -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=49272#49272 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] OSG Arrays and custom allocators?
Hi David. Thanks for the many suggestions. Unfortunately, the code I'm working
on needs to work with a released version of OSG, so mods to OSG itself are not
an option.
Apparently I overlooked the obvious swap() solution. I've done a quick test and
I believe this will work for me.
And thanks, Peter, for the pointer to the mysharedarray example. This is also a
workable solution, if I encounter problems with swap().
-Paul
On 8/15/2012 5:29 AM, David Callu wrote:
Hi Paul,
2012/8/13 Paul Martz pma...@skew-matrix.com mailto:pma...@skew-matrix.com
Hi all --
There doesn't seem to be a way to use a custom allocator with an OSG Array
type. Is that correct, or have I missed something?
You're right
I have a large store of array data, and want to create a new instance of an
OSG Array that references that data store without invoking a data copy or
per-element constructor. The typical way to do this in C++ is with a custom
allocator, but as near as I can tell, OSG's Array types don't allow an
allocator as a template parameter.
If I can't use a custom allocator, does anyone have any ideas on how to
create an OSG Array that references a pre-allocated data store?
Any ideas would be appreciated, thanks.
.
OSG Array use an osg::MixinVectorT template that use a std::vector under the
hood.
I think to some solutions :
1) extend MixinVector template with a second parameter, the CustomAllocator
and pass it to the std::vector used in this template. Then extend
osg::TemplateArray in the same way.
change
typedef TemplateIndexArrayGLbyte,Array::ByteArrayType,1,GL_BYTE ByteArray;
in
template AllocT = defaultAlloc
class ByteArray :
public TemplateIndexArrayGLbyte,Array::ByteArrayType,1,GL_BYTE
{
...
};
Then adapt ArrayVisitor, ConstArrayVisitor and all dependency to accept a
template instead of a class
class ArrayVisitor
{
template AllocT = defaultAlloc
virtual void apply(ByteArrayAllocT) {}
...
};
Really big work, and there are some limitations (serialization for example).
(This could be more simple with C++11 new possibility)
2) Change osg::MixinVectorT in your custom OSG implementation then use
Allocator that you need
and create Vec3ArrayMyAlloc and other osg::Array with your allocator,
extend ArrayVisitor for your new
Arrays types, and so on for all Array's dependency that your code require.
3) Change osg::MixinVectorT to don't use std::vector anymore (do the vector
stuff yourself)
and add in the public interface a function that allow user to change
Allocator of array element at runtime.
All element of the vector will be remove if you change the allocator to
avoid any memory corruption.
4) You probably already dig this solution but ...
If you can store your large store of array data in an std::vector, then
just do a std::swap between std::vector and osg::Array.
5) In the same way of 3) define a custom allocator that could change its
behaviours at runtime, but still use a std::vector.
templateclass ValueT
class MixinVector
{
typedef typename std::vectorValueT, MyAdaptableAllocator vector_type;
public:
...
};
Allocator could have a callback mechanism like osg::Node/osg::NodeCallback.
You can do something like this in allocator to don't hurt performance in
default behaviours (with if/else optimization):
void MyAllocator::function()
{
if (callback == NULL)
do stuff
else
callback()
}
Anyway there are no really good solution...
HTH
David
--
-Paul Martz Skew Matrix Software
http://www.skew-matrix.com/
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[osg-users] Animation of shared model
Hi, I'd like to place several instances of the same model in a scene and play the model's animation individually on each instance - just like having several nathans standing around and letting each one scratch his head asynchronously to the others. The model is loaded once and assigned to a osg::Group. The model's instances are placed by attaching the osg::Group to different PositionAttitudeTransforms. Similar code as in the osganimationviewer is used to retrieve the model's osgAnimation::BasicAnimationManager which is then added as an UpdateCallback for each PositionAttitudeTransform. Obviously, the animations can now only be played synchronously on all instances. How could I achieve being able to start the animation of each instance individually - for example to let each nathan start scratching its head for a few seconds after clicking on it? Thanks a lot for any hints, Cheers, Thilo -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=49274#49274 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Siggraph 2012 OSG BOF Summary
Greetings and Salutations to the OSG community, The SIGGRAPH 2012 OSG BOF was a resounding success. Why Because 1) The presenters were excellent [thanks Luis, Alejandro, Eric, Art and Robert] They showed up [even for the pre BOF planning meeting on Monday], put up with my jokes, were professional and most likely could all sing [see below]...:) 2) The presentations were excellent [thanks Luis, Alejandro, Eric, Art and Robert] The quality of the research / applications presented was excellent. Luis had a presentation in other BOF's. VICOMTECH [Luis / Tassilo and colleagues] is a Spanish research consortium and will host next year's Web3D symposium. Art, I believe had a paper accepted at SIGGRAPH which is very prestigious. Some of Luis's colleagues had some posters at SIGGRAPH. Eric had some great comments on OSG and video walls. Alejandro had an excellent presentation on plate tectonics research at the National University of Mexico. Luis's presentation also complemented a presentation by ESRI in the CG for Simulation BOF. The crowd seemed enthused with Robert's DICOM and shadow and scripting future for OSG. An extremely impressive showing by the group of presenters. I really hit the jackpot on presenters this year. [and previous years of course]. 3) The room was the same room that the SIGGRAPH educator's program used on Monday Aug 6. Thus it had an industrial grade screen, projector and professional sound system. It also had water bottles with the Los Angeles Convention Center logo on the bottles for all the presenters. I brought along a projector and Karaoke machine [powered microphone] and was planning on singing while I presented Robert's slides. However, since the A/V setup for the educator's was very loud and professional, I just spoke Robert's slides using the supplied sound system. Hopefully, in a not quite monotonic voice but with true feeling. The goddess of OSG sound must have been protecting the BOF room. 4) There was probably 50 people in the room. Maybe more. 5) There were a few wish list features fantastically enunciated by the crowd. I'll dig it up and send to Robert. 6) The community. No matter where the BOF is held, the room always has a good crowd. Pay attention to Art's presentation on the need for more forum moderators and volunteers. 7) I got a walking teapot from Pixar after the BOF. There was no BOF scheduled after the OSG BOF. So, the presenters and true believers had a bit of extra post BOF time to pontificate, mull, conduct deep thoughts,.. I thought deep thoughts about singing but realized that I left the Karaoke CD's at home. Bummer. I'll send the presentations to Robert soon. All the presenters really wanted their presentations posted and read by the community. So, have fun. I have a few pictures that I will send to Robert to be posted. Note: In a few weeks I may post some questions related to next year's BOF for the community to consider [time, day,...] John F. Richardson smime.p7s Description: S/MIME cryptographic signature ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
