Re: [osg-users] PickHandler Class on Quick Start Guide
On Nov 8, 2007 3:24 PM, Andreas Goebel <[EMAIL PROTECTED]> wrote: > > > I don´t think so. It´s the osgUtil::IntersectionVisitor that´s > deprecated. osgUtil::IntersectVisitor is the old one that is deprecated. osgUtil::IntersectionVisitor is the new one that exists in 1.9.x onwards. Robert. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] PickHandler Class on Quick Start Guide
> > ...except Robert has already publicly stated that the old > line segment > > and plane intersection classes are now deprecated. In light > of that, I > > would not advise developing any new code that uses them. > > > > > I don´t think so. It´s the osgUtil::IntersectionVisitor > that´s deprecated. The LineSegmentIntersector and > PlaneIntersector are both quite new and derived, like the > polytopeIntersector you use, from osgUtil::Intersector. Oh, my mistake. Sorry I misunderstood. (The naming scheme is so similar between the new and the deprecated classes, it's confusing.) > > The best solution is to not use ShapeDrawables -- ever. > They are not > > well supported for anything other than drawing. > > > The osg needs some replacement for standard-shapes like > included in glut. In my case, the shapeDrawables do what I > want, and thus I will use them! If all you need to do is render, that's great. But there's a significant amount of code, both in OSG and external projects that use OSG, that dynamic_cast Drawables to Geometry objects, and if the cast fails, the code does nothing. So, you've been warned. :-) I think ShapeDrawables are an excellent illustration of how to derive a custom Drawable in OSG. And, as this thread shows, they also demonstrate how custom Drawables have their limitations. It'd be trivial to implement sphere, cone, box, and cylinder using the Geometry class. -Paul ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] PickHandler Class on Quick Start Guide
Paul Martz schrieb: >>> My advice: Don't use ShapeDrawable to draw spheres. Use Geometry >>> instead. The osgUtil Intersector classes work with Geometry because >>> Geometry::accept() actually contains code. >>>-Paul >>> >> Hi, >> >> the lineSegment-intersector and the planeIntersector definitely work >> with shapeDrawables. For picking spheres in a scene I would use a >> lineSegmentIntersector. >> As for the polytopeIntersector in the example-code I don´t know, I >> haven´t tried that. >> > > ...except Robert has already publicly stated that the old line segment and > plane intersection classes are now deprecated. In light of that, I would not > advise developing any new code that uses them. > > I don´t think so. It´s the osgUtil::IntersectionVisitor that´s deprecated. The LineSegmentIntersector and PlaneIntersector are both quite new and derived, like the polytopeIntersector you use, from osgUtil::Intersector. > The best solution is to not use ShapeDrawables -- ever. They are not well > supported for anything other than drawing. > The osg needs some replacement for standard-shapes like included in glut. In my case, the shapeDrawables do what I want, and thus I will use them! Reagards, Andreas >-Paul > > ___ > 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] PickHandler Class on Quick Start Guide
> > My advice: Don't use ShapeDrawable to draw spheres. Use Geometry > > instead. The osgUtil Intersector classes work with Geometry because > > Geometry::accept() actually contains code. > >-Paul > Hi, > > the lineSegment-intersector and the planeIntersector definitely work > with shapeDrawables. For picking spheres in a scene I would use a > lineSegmentIntersector. > As for the polytopeIntersector in the example-code I don´t know, I > haven´t tried that. ...except Robert has already publicly stated that the old line segment and plane intersection classes are now deprecated. In light of that, I would not advise developing any new code that uses them. The best solution is to not use ShapeDrawables -- ever. They are not well supported for anything other than drawing. -Paul ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] PickHandler Class on Quick Start Guide
Paul Martz schrieb: > > > My advice: Don't use ShapeDrawable to draw spheres. Use Geometry > instead. The osgUtil Intersector classes work with Geometry because > Geometry::accept() actually contains code. >-Paul Hi, the lineSegment-intersector and the planeIntersector definitely work with shapeDrawables. For picking spheres in a scene I would use a lineSegmentIntersector. As for the polytopeIntersector in the example-code I don´t know, I haven´t tried that. Regards, Andreas ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] PickHandler Class on Quick Start Guide
Sorry, Paul. I didn't understand what you said in your last email about
trying to pick a Drawable that isn't Geometry. What do you mean by that? My
shapes are ShapeDrawables that are connected to a Geode and then to a
MatrixTransform.
If you are trying to pick a ShapeDrawable, then you are trying to pick a
Drawable that isn't a Geometry. ShapeDrawable and Geometry both derive from
Drawable, therefore ShapeDrawable is a Drawable but is not a Geometry.
I honestly have no idea on where to begin to derive my own intersector...
Can you give me a hand? Thanks.
First, I apologize. Ignore my previous post, which said you needed to create
a new Intersector to intersect a ShapeDrawable. I was wrong. In fact, the
current Intersector classes in osgUtil are fine. The problem is entirely
with ShapeDrawable.
Here's your problem:
void ShapeDrawable::accept(ConstAttributeFunctor&) const
{
}
That's ShapeDrawable.cpp, about line 1805. Compare that to the definition of
Geometry::accept(), which actually does something.
I'm not sure Robert ever intended ShapeDrawables to be used in anything
other than examples, perhaps he can comment. Certainly when Robert added the
new intersection classes in osgUtil, he did not implement this necessary
method in ShapeDrawable.
My advice: Don't use ShapeDrawable to draw spheres. Use Geometry instead.
The osgUtil Intersector classes work with Geometry because
Geometry::accept() actually contains code.
-Paul
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Re: [osg-users] PickHandler Class on Quick Start Guide
Sorry, Paul. I didn't understand what you said in your last email about trying to pick a Drawable that isn't Geometry. What do you mean by that? My shapes are ShapeDrawables that are connected to a Geode and then to a MatrixTransform. I honestly have no idea on where to begin to derive my own intersector... Can you give me a hand? Thanks. Renan M Z Mendes 2007/11/6, Paul Martz <[EMAIL PROTECTED]>: > > If you're trying to pick a Drawable that isn't a Geometry, unmodified OSG > won't pick it. You'll need to derive your own Intersector class to perform > picking on custom Drawables. >-Paul > > > -- > *From:* [EMAIL PROTECTED] [mailto: > [EMAIL PROTECTED] *On Behalf Of *Renan Mendes > *Sent:* Tuesday, November 06, 2007 4:52 PM > *To:* OpenSceneGraph Users > *Subject:* Re: [osg-users] PickHandler Class on Quick Start Guide > > Hi, Paul. > >I do have the complete version. You had already given me the address to > download some time ago. > > Well, I have just made some tests. I've create a simple method (just to > print a prompt message) when the node was mouse picked, but it didn't work. > Do you think that's because my Point class instances are matrix and not > shapes? How can I adapt your code for that objective? > >Thanks again. > > >Renan M Z Mendes > > > ___ > 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] PickHandler Class on Quick Start Guide
If you're trying to pick a Drawable that isn't a Geometry, unmodified OSG won't pick it. You'll need to derive your own Intersector class to perform picking on custom Drawables. -Paul _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Renan Mendes Sent: Tuesday, November 06, 2007 4:52 PM To: OpenSceneGraph Users Subject: Re: [osg-users] PickHandler Class on Quick Start Guide Hi, Paul. I do have the complete version. You had already given me the address to download some time ago. Well, I have just made some tests. I've create a simple method (just to print a prompt message) when the node was mouse picked, but it didn't work. Do you think that's because my Point class instances are matrix and not shapes? How can I adapt your code for that objective? Thanks again. Renan M Z Mendes ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] PickHandler Class on Quick Start Guide
Hi, Paul. I do have the complete version. You had already given me the address to download some time ago. Well, I have just made some tests. I've create a simple method (just to print a prompt message) when the node was mouse picked, but it didn't work. Do you think that's because my Point class instances are matrix and not shapes? How can I adapt your code for that objective? Thanks again. Renan M Z Mendes ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] PickHandler Class on Quick Start Guide
Hi Renan -- Sounds like maybe you don't have the complete source? You can download it from here: http://www.skew-matrix.com/OSGQSG/index.html You say calling the method in _selectedNode "doesn't seem to work very well" but you haven't told me how it fails so that's tough to diagnose. Does it compile? If so, does it crash because the pointer is NULL? You said your sphere was a "shape". Do you mean a ShapeDrawable? If so, I believe the Intersector classes are limited to picking Geometry classes... not sure, check the code. Hope that helps, Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com <http://www.skew-matrix.com/> 303 859 9466 _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Renan Mendes Sent: Tuesday, November 06, 2007 4:15 PM To: OpenSceneGraph Users Subject: Re: [osg-users] PickHandler Class on Quick Start Guide Hi, there, Paul. I have tried to adapt your PickHandler class to solve my specific problem, but I couldn't. Please, help me out. Honestly I haven't completely understand it (when you check for Intersections and stuff like this) but I imagined that all I had to do was to put my own methods after the "if (_selectedNode.valid())" condition. Well, let me elaborate a little bit more on my software's current situation. There is a Point class, that is osg::MatrixTransform's daughter. Each Point's instance has a geode child, which carries a sphere with a certain color. What I need to do is change the sphere's color after this shape was selected by mouse picking. I've tried creating a method changeColor, that belonged to the Point class, and I've made the PickHandler a daughter of that class, so that it would have access to the method. Specifics of the method aside, what do I have to do to call that method? Is it simply by writing "_selectedNode->changeColor();" in the above mentioned condition's nest? That doesn't seem to work very well Do I have to declare _selectedNode as a global variable before the definition of the class? If yes, what kind o pointer would it be? By answering this, you'll make someone eternally grateful to you! Renan M Z Mendes ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] PickHandler Class on Quick Start Guide
Hi, there, Paul. I have tried to adapt your PickHandler class to solve my specific problem, but I couldn't. Please, help me out. Honestly I haven't completely understand it (when you check for Intersections and stuff like this) but I imagined that all I had to do was to put my own methods after the "if (_selectedNode.valid())" condition. Well, let me elaborate a little bit more on my software's current situation. There is a Point class, that is osg::MatrixTransform's daughter. Each Point's instance has a geode child, which carries a sphere with a certain color. What I need to do is change the sphere's color after this shape was selected by mouse picking. I've tried creating a method changeColor, that belonged to the Point class, and I've made the PickHandler a daughter of that class, so that it would have access to the method. Specifics of the method aside, what do I have to do to call that method? Is it simply by writing "_selectedNode->changeColor();" in the above mentioned condition's nest? That doesn't seem to work very well Do I have to declare _selectedNode as a global variable before the definition of the class? If yes, what kind o pointer would it be? By answering this, you'll make someone eternally grateful to you! Renan M Z Mendes ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] PickHandler Class on Quick Start Guide
I'l check into that. Thank you, Paul. Renan ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] PickHandler Class on Quick Start Guide
The code shown in the book is just a snippet. You should download and compile the full examples from the book's Web site. http://www.skew-matrix.com/OSGQSG/ Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com <http://www.skew-matrix.com/> 303 859 9466 _ From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Renan Mendes Sent: Wednesday, October 10, 2007 4:42 AM To: OSG Mailing List Subject: [osg-users] PickHandler Class on Quick Start Guide I think some kind of error occurred when I've tried to send this message to the mailing list, so just to be sure, here it is again: Hello again, everyone. I've got another question on EventHandlers, but specifically on the PickHandler class that was shown on the Quick Start Guide (please reference to this book as to understand my question, pages 101-104 (115 of the PDF file)) So that I could learn a little bit more about the subject I've tried simply copying the class and the main function to a .cpp file, then I've created a simple scene and have tried to compile this code. The error messages were abundant but they were all related in some way to _selectedNode. Is this identifier correct? Am I missing the point here somewhere? I mean, is this the place where I should write something of my own? Sorry if my questions are too obvious, but I really couldn't figure it out after reading and re-reading... Renan M Z Mendes ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] PickHandler Class on Quick Start Guide
I think some kind of error occurred when I've tried to send this message to the mailing list, so just to be sure, here it is again: Hello again, everyone. I've got another question on EventHandlers, but specifically on the PickHandler class that was shown on the Quick Start Guide (please reference to this book as to understand my question, pages 101-104 (115 of the PDF file)) So that I could learn a little bit more about the subject I've tried simply copying the class and the main function to a .cpp file, then I've created a simple scene and have tried to compile this code. The error messages were abundant but they were all related in some way to _selectedNode. Is this identifier correct? Am I missing the point here somewhere? I mean, is this the place where I should write something of my own? Sorry if my questions are too obvious, but I really couldn't figure it out after reading and re-reading... Renan M Z Mendes ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
