[osg-users] computeIntersections function when window size changes
Hello I've got trouble by using the computeIntersections function with OSG. In my whole application I use a callback when the user clicks in the current window. With this callback, I receive two integers (x y), corresponding to the mouse cursor position. Afterwards, I compute two floats X Y corresponding to the cursor position in the scale [-1.0;1.0] : X = (2.f * x / width ) - 1.f; Y = (-2.f * y / height ) + 1.f; where: width = windows[0]-getTraits()-width; height = windows[0]-getTraits()-height; I use windows like this: osgViewer::Viewer::Windows windows; Viewer-getWindows(windows); For each click I do: osgUtil::LineSegmentIntersector::Intersections intersections; m_pViewer-computeIntersections(X, Y, intersections); And this seems to be OK. The problem occurs when i change the size of the window. If I increase it, even if I click around an object, some pixels farther, it still gets an intersection, while it shouldn't. So the object seems to be bigger than it is. Do you have an idea of what i must do in order the function to be still operative ? I probably have to change something in the traits, isn'it ? Thanks in advance for your help... -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=36324#36324 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Transparency Invisibility
Hello OSG Community I am currently playing with opacity/transparency capabilities of geodes in a model. In that way, i use: material = (osg::Material *) Geode-getStateSet()-getAttribute(osg::StateAttribute::MATERIAL); Geode-getStateSet()-setMode( GL_BLEND, osg::StateAttribute::ON ); material-setTransparency(osg::Material::FRONT, 1.-opacity); Geode-getStateSet()-setAttributeAndModes(material, osg::StateAttribute::OVERRIDE); It works, the geode becomes transparent. But is there a way to see objects behind this geode ? I mean : if i use Geode-setNodeMask(0x00); the geode is invisible and I can see what is behind, but not with the transparency effect. Please, do you have an idea how managing the code if i want to see what is behind a transparent object ? Cheers, Mathieu -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=33972#33972 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Transparency Invisibility
Hi Juan Thank you very much for the precise answer. I try this ! Cheers, Mathieu -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=33974#33974 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] To freeze an AnimationPath to a desired time
Good morning, I didn't find the solution yet... Impossible to go to a static desired point of the animation. If you have an idea... Thanks a lot. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=30207#30207 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] To freeze an AnimationPath to a desired time
Hello community Given a model with an AnimationPath predefined in a file, with about 200 points (6.6 seconds of animation), I would like my application to allow the user to go to one of those points and freeze the animation. Typically, it would be with a slider. For that, I thought that I had to pause the animation by: pAnimationPathCallback-setPause(true); But I don't know how to indicate the animation to go to the desired time (or to the desired point). Maybe by defining an offset, but it didn't work. You understood, it is like a video player... Thanks in advance. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=30132#30132 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] StateSet and changes
Hello Yes, great job ! There was an other problem : I did an optimize() of my model ; at that moment, all stateSet lost their geode parent... and all of them were suddenly linked to the same and main parent (the cabine of the aircraft). Now is much better ! Thanks again. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=30106#30106 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] I'm lost the UpdateCallbacks
I update thattopic, because I have the same problem as LittleG () : one OSG
file with an AnimationPathCallback:
num_children 1
MatrixTransform {
DataVariance DYNAMIC
name bugklappe01
nodeMask 0x
cullingActive TRUE
UpdateCallbacks {
AnimationPathCallback {
pivotPoint 0 0 0
timeOffset 0
timeMultiplier 1
AnimationPath {
LoopMode LOOP
ControlPoints {
0 -15580.4365234375 482791.625 4228893.5 0.876726806163788 0 0
-0.48098878698 0.99940395355 1 1
0.033350718021 -15580.4365234375 482791.625 4228893.5
-0.829647123813629 0 0 0.558288156986237 0.99940395355 1 1
0.066701436043 -15580.4365234375 482791.625 4228893.5
-0.775771200656891 0 0 0.631014347076416 0.99940395355 1 1
...
...
...
The object moves after the node has been loaded.
However, impossible to access the callback in order to change the
timeMultiplier (I would like to accelerate or decelerate the motion with a
slider on the screen... and go to a static position with an other slider).
Thanks.
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Re: [osg-users] I'm lost the UpdateCallbacks
Oops sorry, I found the reason, just after written the post. Please don't take into account -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=30121#30121 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] StateSet and changes
Hello Ulrich Thanks a lot for your answer. You're probably right. The fault may come from the first Geode's stateSet. When you say to give each geode the copy of its stateset, could you please indicate me how to do ? Do we still use getOrCreateStateSet() method for each node ? Thanks a lot for your help. Regards. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=30101#30101 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Misunderstanding NODE / DRAWABLE notions
I finally used a OSG file, and everything is solved. Thank you :D -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=30076#30076 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] StateSet and changes
Dear OSG community,
I try to manage with the model of an aircraft. I whish my 3d model to react to
the mouse cursor when one of its sub-models is intersected by this cursor.
This is the simplified architecture of the OSG file :
*SceneRoot (MatrixTransform) : 1 children
***ExteriorCab (Group) : 4 children
*ExteriorCab-OFFSET (Group) : 1 children
***ExteriorCab-GEODE (Geode) : 8 drawables
*Tail (group) : 3 children
***Tail-OFFSET (Group) : 1 children
*Tail-GEODE (Geode) : 3 drawables
***RearRotor (Group) : 1 children
*RearRotor-GEODE (Geode) : 2 drawables
***Cylinder (Group) : 1 children
*Cylinder-OFFSET (Group) : 1 children
***Cylinder_GEODE (Geode) : 1 drawable
*RightWheel (Group) : 2 children
***RightWheel-OFFSET (Group) : 1 children
*RightWheel-GEODE (Geode) : 1 drawable
***RightWheelCylinder (Group) : 1 children
*RightWheelCylinder-GEODE (Geode) : 1 drawable
*LeftWheel (Group) : 2 children
***LeftWheel-OFFSET (Group) : 1 children
*LeftWheel-GEODE (Geode) : 1 drawable
***LeftWheelCylinder (Group) : 1 children
*LeftWheelCylinder-GEODE (Geode) : 1 drawable
(very simplified aircraft !)
the model comes from a file, i can't change it
What I do :
osg::ref_ptrosg::Group mRoot;
osg::ref_ptrosg::Node mModel;
mModel = osgDB::readNodeFile(m_ModelName);
mRoot-addChild(mModel.get());
osg::Group *groupSceneRoot;
osg::Group *ExteriorCab;
osg::Group *ExteriorCab_OFFSET;
osg::Group *Tail;
osg::Group *RightWheel;
osg::Group *LeftWheel;
osg::Geode *ExteriorCab_GEODE;
osg::Group *Tail_OFFSET;
osg::Group *RearRotor;
osg::Group *Cylinder;
osg::Group *Cylinder_OFFSET;
osg::Geode *Tail_GEODE;
osg::Geode *RearRotor_GEODE;
osg::Geode *Cylinder_GEODE;
osg::Group *RightWheel_OFFSET;
osg::Group *RightWheelCylinder;
osg::Geode *RightWheel_GEODE;
osg::Geode *RightWheelCylinder_GEODE;
osg::Group *LeftWheel_OFFSET;
osg::Group *LeftWheelCylinder;
osg::Geode *LeftWheel_GEODE;
osg::Geode *LeftWheelCylinder_GEODE;
groupSceneRoot = mModel-asGroup();
ExteriorCab = groupSceneRoot-getChild(0)-asGroup();
ExteriorCab_OFFSET = ExteriorCab-getChild(0)-asGroup();
Tail = ExteriorCab-getChild(1)-asGroup();
RightWheel = ExteriorCab-getChild(2)-asGroup();
LeftWheel = ExteriorCab-getChild(3)-asGroup();
ExteriorCab_GEODE = ExteriorCab_OFFSET-getChild(0)-asGeode();
Tail_OFFSET = Tail-getChild(0)-asGroup();
RearRotor = Tail-getChild(1)-asGroup();
Cylinder = Tail-getChild(2)-asGroup();
Cylinder_OFFSET = Cylinder-getChild(0)-asGroup();
Tail_GEODE = Tail_OFFSET-getChild(0)-asGeode();
RearRotor_GEODE = RearRotor-getChild(0)-asGeode();
Cylinder_GEODE = Cylinder_OFFSET-getChild(0)-asGeode();
RightWheel_OFFSET = RightWheel-getChild(0)-asGroup();
RightWheelCylinder = RightWheel-getChild(1)-asGroup();
RightWheel_GEODE = RightWheel_OFFSET-getChild(0)-asGeode();
RightWheelCylinder_GEODE = RightWheelCylinder -getChild(0)-asGeode();
LeftWheel_OFFSET = LeftWheel-getChild(0)-asGroup();
LeftWheelCylinder = LeftWheel-getChild(1)-asGroup();
LeftWheel_GEODE = LeftWheel_OFFSET-getChild(0)-asGeode();
LeftWheelCylinder_GEODE = LeftWheelCylinder -getChild(0)-asGeode();
// I have thus access to all geodes ()
// Now i create an array of stateset, and an array of geodes
osg::StateSet *ListGeodeStateSet[8];
osg::Geode *ListGeode[8];
ListGeode[0] = ExteriorCab_GEODE;
ListGeode[1] = Tail_GEODE;
ListGeode[2] = RearRotor_GEODE;
ListGeode[3] = Cylinder_GEODE;
ListGeode[4] = RightWheel_GEODE;
ListGeode[5] = RightWheelCylinder_GEODE;
ListGeode[6] = LeftWheel_GEODE;
ListGeode[7] = LeftWheelCylinder_GEODE;
for (int i=0;i8;i++)
ListGeodeStateSet[index] = ListGeode[i]-getOrCreateStateSet();
// What I want is to display only polygons if the cursor mouse picks a
sub-model (here, one of the 8 geodes that decompose the whole aircraft):
osg::PolygonMode *PolyModeObj[8];
for (int i=0;i8;i++)
{
PolyModeObj[i] = dynamic_cast osg::PolygonMode*
( ListGeodeStateSet[i]-getAttribute(
osg::StateAttribute::POLYGONMODE ));
if ( !PolyModeObj[i] )
{
PolyModeObj[i] = new osg::PolygonMode;
ListGeodeStateSet[i]-setAttribute( PolyModeObj[i]);
}
}
// In the pick callback, I check which geode was selected by the cursor:
osgUtil::LineSegmentIntersector::Intersections::iterator hitr;
if (Viewer-computeIntersections(x, y, intersections))
{
hitr = intersections.begin();
osg::Geode *GeodeParent = hitr-drawable-getParent(0)-asGeode();
for (int d=0;d8;d++)
{
if (GeodeParent == ListGeode[d])
{
PolyModeObj[d]-setMode( osg::PolygonMode::FRONT_AND_BACK,
osg::PolygonMode::LINE );
break;
}
}
}
But... when the cursor selects the geode ExteriorCab_GEODE, the whole aircaft
moves to polygon display (even wheels, tail and the rest...). Only the cabin
should appear as polygons.
When the cursor selects a wheel, nothing appears. The setMode(
osg::PolygonMode::FRONT_AND_BACK, osg::PolygonMode::LINE ); function has no
effect.
ExteriorCab_GEODE has an effect on
Re: [osg-users] Newbie question about osg::Vec3Array
Thanks a lot, Alberto. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=29991#29991 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
[osg-users] Misunderstanding NODE / DRAWABLE notions
Hello
This is my problem :
I load a *.3ds file (an aircraft). I don't have the software 3dsMax so I don't
know how it was created...
From that file, I do bascially :
osg::ref_ptrosg::Node Model;
osg::ref_ptrosg::Group Root;
Model = osgDB::readNodeFile(name of the file.3ds);
Root = new osg::Group;
Root-addChild(Model.get());
I add other stuff in mRoot... (3 osg::ShapeDrawable like cylinders and 3 like
cones, to simulate 3 axis X Y Z ; a osgText::Text to write some info) In short,
nothing extraordinary !
I have a pick function. When I move the mouse, I check if the cursor intersects
with a part of the aircraft.
I used the examples of OSG :
osgUtil::LineSegmentIntersector::Intersections intersections;
osg::ref_ptrosg::Drawable HitDrawable;
osg::Geometry * HitGeometry;
CString strName;
CString strNameParent;
if (m_pViewer-computeIntersections(x, y, intersections))
{
// I keep only the 1st intersection :
osgUtil::LineSegmentIntersector::Intersections::iterator hitr =
intersections.begin();
HitDrawable = hitr-drawable;
HitGeometry = HitDrawable-asGeometry();
strName = CString(hitr-drawable-getName().c_str());
strNameParent = CString(hitr-drawable-getParent(0)-getName().c_str());
// After that I put the drawable in a transparent state :
float transparency = 0.3;
osg::StateSet * stateset = HitDrawable-getOrCreateStateSet();
osg::Material * mm =
dynamic_castosg::Material*(stateset-getAttribute(osg::StateAttribute::MATERIAL));
if (!mm)
mm = new osg::Material;
mm-setAlpha(osg::Material::FRONT, transparency);
stateset-setAttributeAndModes( mm, osg::StateAttribute::OVERRIDE |
osg::StateAttribute::ON);
stateset-setMode(GL_BLEND, osg::StateAttribute::OVERRIDE |
osg::StateAttribute::ON );
stateset-setMode(GL_LIGHTING,osg::StateAttribute::OVERRIDE |
osg::StateAttribute::ON );
stateset-setRenderingHint(osg::StateSet::TRANSPARENT_BIN);
}
This is Okay, I see a part of the aircraft that becomes transparent, when the
mouse cursor goes in front of it.
What I would want to do, afterwards, is that if the cursor leaves that part of
the aircraft, the rendering comes back to the initial state (not transparent).
But I don 't know how to do... the main question behind my post (sorry for
being so long !) is that I don't understand why the intersector accesses to a
drawable, while the aircraft comes from a Node File.
I believed that drawables were linked to Geode class ?!
When I ask for the strings strName and strNameParent with the functions :
strName = CString(hitr-drawable-getName().c_str());
strNameParent = CString(hitr-drawable-getParent(0)-getName().c_str());
I see in strName
and Tail or Wing or Rotor... in strNameParent, depending on where the
cursor is. Logic.
So the intersector reads someting that comes from the node file.
But is this a drawable ??
In the beginning of the appli, can I have the list of all drawables, those
sub-parts of the aircraft model (tail, wing ...) and put a osg::StateSet on
each of them ?
If I could, I would activate/desactivate transparency possibilities as I want.
For the moment, if I have access to a drawable (via the hitr-drawable), I
don't have access to others, so when a drawable becomes transparent, it will
always be. I can't manipulate several drawables in the same time.
I hope I was clear. I've just started working with OSG. It is fascinating but
not easy !
As all information are in the .3ds file, I don't know if can manipulate
something with OSG.
Thanks in advance.
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Re: [osg-users] Misunderstanding NODE / DRAWABLE notions
Alberto Luaces wrote: A Geode is a Node. Hello Alberto, Yes a geode is a node. But how is it possible to create a geode, from a 3DS (or.OSG) file ? Mathieu -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=30001#30001 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
