Re: [osg-users] Dinamic Line Drawing
Hi Patrick,
Similar to the change that Judson suggested for 'Add_new_point', the
osg::Matrix and
osg::Vec3f you pass into the constructor should be 'const osg::Matrix&' (same
for vector),
otherwise you are making a copy of the object every time.
The empty destructor is okay, as everything is contained in smart pointers and
will be
properly cleaned up. (Except for the original usage of 'Add_new_point'.)
Unless you need them for later modification, you don't have to have member
variables for
the matrices, the osg::Geode, and the color/normal arrays.
Cheers,
/ulrich
On 10/05/13 23:57, Judson Weissert wrote:
> Hi Patrick,
>
> On 5/9/2013 9:16 PM, Patrick Keenan wrote:
>>...
>> Code:
>>
>> osg::Vec3Array* line_pts = new osg::Vec3Array;
>> line_pts->push_back(osg::Vec3(100, 0, 0));
>> line_pts->push_back(osg::Vec3(0, 100, 500));
>> line_pts->push_back(osg::Vec3(100, 100, 100));
>>
>>
>> lines_test = new
>> M_OSG_line_strip(osg::Matrix::rotate(osg::inDegrees(0.0f), 0.0f,
>> 0.0f, 1.0f),
>> osg::Matrix::translate(0.0f, 0.0f, 0.0f),
>>
>> osg::Matrix::rotate(osg::inDegrees(0.0f), 0.0f,
>> 0.0f, 1.0f),
>> line_pts,
>> osg::Vec4(0.0f,1.0f,1.0f,1.0f)
>> );
>
> Memory leak if lines_test assignment line throws an exception (lines_pts will
> leak). An
> osg::ref_ptr would solve this.
>
>>...
>> Code:
>>
>> void M_frame::OnTestBtnClick(wxCommandEvent& WXUNUSED(event))
>> {
>> osg::Vec3f* new_pt = new osg::Vec3f(4000.0f, 2000.0f, 0.0f); // works
>> lines_test->Add_new_point(new_pt);
>> }
>>
> Another memory leak for all points created since nobody is calling delete. I
> suggest
> passing osg::Vec3 parameters by value or const reference.
>
> Regards,
>
> Judson
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Re: [osg-users] Dinamic Line Drawing
Hi Patrick,
On 5/9/2013 9:16 PM, Patrick Keenan wrote:
Hi,
This post was really helpful for me but I still couldn't add points on the fly
either. A few edits made it happen so I'm attaching my M_OSG_line_strip class.
To use the class I have the following in my CreateScene()
Code:
osg::Vec3Array* line_pts = new osg::Vec3Array;
line_pts->push_back(osg::Vec3(100, 0, 0));
line_pts->push_back(osg::Vec3(0, 100, 500));
line_pts->push_back(osg::Vec3(100, 100, 100));
lines_test = new
M_OSG_line_strip(osg::Matrix::rotate(osg::inDegrees(0.0f), 0.0f, 0.0f, 1.0f),
osg::Matrix::translate(0.0f, 0.0f, 0.0f),
osg::Matrix::rotate(osg::inDegrees(0.0f), 0.0f, 0.0f, 1.0f),
line_pts,
osg::Vec4(0.0f,1.0f,1.0f,1.0f)
);
Memory leak if lines_test assignment line throws an exception (lines_pts
will leak). An osg::ref_ptr would solve this.
tmp_root->addChild(lines_test->Get());
and to dynamically add a new line I have
Code:
void M_frame::OnTestBtnClick(wxCommandEvent& WXUNUSED(event))
{
osg::Vec3f* new_pt = new osg::Vec3f(4000.0f, 2000.0f, 0.0f); // works
lines_test->Add_new_point(new_pt);
}
Another memory leak for all points created since nobody is calling
delete. I suggest passing osg::Vec3 parameters by value or const reference.
Regards,
Judson
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Re: [osg-users] Dinamic Line Drawing
Hi,
This post was really helpful for me but I still couldn't add points on the fly
either. A few edits made it happen so I'm attaching my M_OSG_line_strip class.
To use the class I have the following in my CreateScene()
Code:
osg::Vec3Array* line_pts = new osg::Vec3Array;
line_pts->push_back(osg::Vec3(100, 0, 0));
line_pts->push_back(osg::Vec3(0, 100, 500));
line_pts->push_back(osg::Vec3(100, 100, 100));
lines_test = new
M_OSG_line_strip(osg::Matrix::rotate(osg::inDegrees(0.0f), 0.0f, 0.0f, 1.0f),
osg::Matrix::translate(0.0f, 0.0f, 0.0f),
osg::Matrix::rotate(osg::inDegrees(0.0f), 0.0f, 0.0f, 1.0f),
line_pts,
osg::Vec4(0.0f,1.0f,1.0f,1.0f)
);
tmp_root->addChild(lines_test->Get());
and to dynamically add a new line I have
Code:
void M_frame::OnTestBtnClick(wxCommandEvent& WXUNUSED(event))
{
osg::Vec3f* new_pt = new osg::Vec3f(4000.0f, 2000.0f, 0.0f); // works
lines_test->Add_new_point(new_pt);
}
Seems to work great. Critique of the use of osg::ref_ptr is welcomed.
Thanks, Patrick
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Attachments:
http://forum.openscenegraph.org//files/m_osg_line_strip_887.h
http://forum.openscenegraph.org//files/m_osg_line_strip_762.cpp
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Re: [osg-users] Dinamic Line Drawing
Hi Allen, On 21/5/09 5:47 PM, Allen Saucier wrote: Has anyone figured out how to draw only the "last" segment that was added? I've still not figured that out and I've got over 15,000 small line segments in my vertex array ... And from what I can tell: ... just causes the "ALL" the vertices to be redrawn. Is there a more efficient way? I'd like to draw only the last "line," which would be the line segment between the last vertex and the new last vertex just added. OpenGL/OpenSceneGraph always redraws the entire geometry each frame. There is no such thing as 'existing' (already drawn) geometry. Does anyone know if there is a way to do that? Thx! :) There isn't. (Well, if your camera doesn't move and the rest of the scene is completely static, you could store the frame and depth buffer of the last frame, load that every time and only draw what has changed. But in your case that's probably not worth the trouble.) Instead, try to make it as simple as possible for OSG to discard geometry. For example you could batch line segments together (say everything in a 100m radius) so that OSG can cull that Drawable if it's outside the view frustum. Cheers, /ulrich ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dinamic Line Drawing
Has anyone figured out how to draw only the "last" segment that was added? I've still not figured that out and I've got over 15,000 small line segments in my vertex array osg::ref_ptr m_ov3aLineVerticesData; And from what I can tell: m_ov3aLineVerticesData->push_back(osg::Vec3(x2,y2,z2)); // curr position m_podreTrailDrawElements->setFirst(0); m_podreTrailDrawElements->setCount(m_ov3aLineVerticesData->size()); m_ogeomTrailGeometry->dirtyBound();// forces needed boundary recalc just causes the "ALL" the vertices to be redrawn. Is there a more efficient way? I'd like to draw only the last "line," which would be the line segment between the last vertex and the new last vertex just added. Does anyone know if there is a way to do that? Thx! :) Allen -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=12688#12688 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dinamic Line Drawing
On 14/5/09 1:10 PM, Sergey Bocharov wrote: I find the problem. I use QT and QOSGGraphics.cpp for rendering OpenGL into QT Widget. So , when I try to make dYnamic line , it works bad (in usual viewer works fine). Example in attach. Please help to fix it , or advise another method to render osg to QT Widget. I don't have Qt (on OS X) so I can't test your code but I find it unlikely that the render backend (it's just an OpenGL context after all) would have an effect on the OSG core rendering. It's been a while since I've done Qt but how are you triggering the draws? There's some code to connect a timer to an update function but I can't actually find that function. Cheers, /ulrich ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dinamic Line Drawing
Hi Sergey,
On 13/5/09 7:53 PM, Sergey Bocharov wrote:
I spend my time and here is му test case for Dinamic Line Drawing
As I see , we dont need no setUseDisplayList(false), no dirtyBound()
It works fine.
Now i will search why it dont works in my application.
Test case in attach. run it and just press any key.
The test case you sent works for me.
And you do use setUseDisplayList(false) in the TglLine::TglLine() constructor.
However, in the TglLine::TglLine(float ...) constructor you have identical code that
*doesn't* setUseDisplayList(false). Maybe you're using the other constructor?
I'd always refactor code like that to use a common init function:
TglLine::TglLine() { init(); }
TglLine::TglLine(float x, float y, float z, const osg::Vec4& colour) { init();
addNode(x,y,z,colour); }
Cheers,
/uli
PS: s/Dinamic/Dynamic/g ;-)
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Re: [osg-users] Dinamic Line Drawing
Hi, ALL I spend my time and here is му test case for Dinamic Line Drawing As I see , we dont need no setUseDisplayList(false), no dirtyBound() It works fine. Now i will search why it dont works in my application. Test case in attach. run it and just press any key. ... Thank you! Cheers, Sergey -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=12025#12025 osgDinamicLine.cpp Description: Binary data ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dinamic Line Drawing
Hi Sergey, the code that I posted does work. Have you tried using my code? [Question] Allen -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=12001#12001 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dinamic Line Drawing
Hi Sergey, what you are trying to do is certainly possible, but it is hard to follow and correct code snippets. I suggest you make a very simple example that people can compile. Then post the zipped code to the forum/mailing list and let someone fix it. jp Sergey Bocharov wrote: All my experiments false. I cant make a simple thing - draw dinamic line in my application with color vertex. May be i'm stuped, but i'm confused about gurus of this forum who cant help to do this simple thing. :-( -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=11962#11962 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org -- This message is subject to the CSIR's copyright terms and conditions, e-mail legal notice, and implemented Open Document Format (ODF) standard. The full disclaimer details can be found at http://www.csir.co.za/disclaimer.html. This message has been scanned for viruses and dangerous content by MailScanner, and is believed to be clean. MailScanner thanks Transtec Computers for their support. ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dinamic Line Drawing
All my experiments false. I cant make a simple thing - draw dinamic line in my application with color vertex. May be i'm stuped, but i'm confused about gurus of this forum who cant help to do this simple thing. :-( -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=11962#11962 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dinamic Line Drawing
Here's my working code, Sergey:
// CLASS
//
class COsgPaxNodeSceneElementInfo
{
public:
// TRAIL components
//
osg::ref_ptr m_podreTrailDrawElements;
osg::ref_ptr m_ov3aLineVerticesData;
osg::ref_ptr m_ogeomTrailGeometry;
osg::ref_ptrm_ogeoTrailGeode;
osg::Vec3d m_ov3dPrevPos;
void COsgPaxNodeSceneElementInfo::m_vConstructATrail(double x, double y, double
z);
void COsgPaxNodeSceneElementInfo::m_vUpdateTrail( double x2, double y2, double
z2);
}; // class
// CALLED BEFORE I ATTEMPT TO UPDATE A TRAIL
//
void COsgPaxNodeSceneElementInfo::m_vConstructATrail(double x, double y, double
z)
{
// initialize previous to current point/position sent in
m_ov3dPrevPos.set(x,y,z);
// curr pos
osg::Vec3d ov3d(x,y,z);
// ALLOCATE ONCE AND ONLY ONCE
m_podreTrailDrawElements= new osg::DrawArrays(osg::PrimitiveSet::LINE_STRIP);
m_ov3aLineVerticesData = new osg::Vec3Array();
m_ogeomTrailGeometry= new osg::Geometry();
m_ogeoTrailGeode= new osg::Geode;
m_ov3aLineVerticesData->push_back(m_ov3dPrevPos); // prev position
m_ov3aLineVerticesData->push_back(ov3d); // curr position
m_podreTrailDrawElements->setFirst(0);
m_podreTrailDrawElements->setCount(m_ov3aLineVerticesData->size());
m_ogeomTrailGeometry->addPrimitiveSet(m_podreTrailDrawElements.get());
m_ogeomTrailGeometry->setVertexArray(m_ov3aLineVerticesData.get());
// attempt to draw lines faster by disabling display lists &
// then with each new vertex added, call dirtyBound() on the geometry.
m_ogeomTrailGeometry->setUseDisplayList(false);
m_ogeoTrailGeode->addDrawable(m_ogeomTrailGeometry.get());
// ADD ONLY ONCE to the Node Scene
root->addChild(m_ogeoTrailGeode.get());
} // m_vConstructATrail
// CALLED PERIODICALLY
//
void COsgPaxNodeSceneElementInfo::m_vUpdateTrail(
double x2, double y2, double z2)
{
m_ov3aLineVerticesData->push_back(osg::Vec3(x2,y2,z2)); // curr position
m_podreTrailDrawElements->setFirst(0);
m_podreTrailDrawElements->setCount(m_ov3aLineVerticesData->size());
m_ogeomTrailGeometry->dirtyBound();// forces needed boundary recalc
} // m_vUpdateTrail
After much experimentation, I got this to work, though, it is still not quite
right. I have no color and did not know how to set that up. But from your
code, I now know how to do that. :)
Still, osg, redraws ALL of the line segments instead of the very last one
added. I would prefer it to only draw the last one added. That would be 1000
times faster. 8)
I found that I had to have m_ogeomTrailGeometry->setUseDisplayList(false); set
to false and I had to call m_ogeomTrailGeometry->dirtyBound(); in order to get
my code to work at all.
Hope this helps :?
Allen
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Re: [osg-users] Dinamic Line Drawing
Paul Martz wrote :
>When you first set up your line strip, you only put one vertex in it, so I
>wouldn't expect anything to be drawn until you add an additional vertex.
>You have set your color binding to be BIND_PER_VERTEX and you have >one color
>in the color array. Initially (when you only have one vertex) this is OK.
>But as soon as you add more vertices, you do not also add more colors, >so
>this could potentially cause a crash if OSG or OpenGL tries to index off >the
>end of you color array.
When I add new vertex , I add a new color for this vertex:
colors->push_back(osg::Vec4(color.red(),color.green(),color.blue(),
color.alphaF()));
Look this code :
// ADD NODE
void TglLine::addNode(float X,float Y,float Z, QColor color){
vertexData->push_back(osg::Vec3(X,Y,Z));
colors->push_back(osg::Vec4(color.red(),color.green(),color.blue(),
color.alphaF()));
drawArrayLines->setFirst(0);
int i =vertexData->size();
drawArrayLines->setCount(i);
linesGeom->dirtyBound();
}
//HERE my call
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Re: [osg-users] Dinamic Line Drawing
When you first set up your line strip, you only put one vertex in it, so I
wouldn't expect anything to be drawn until you add an additional vertex.
You have set your color binding to be BIND_PER_VERTEX and you have one color
in the color array. Initially (when you only have one vertex) this is OK.
But as soon as you add more vertices, you do not also add more colors, so
this could potentially cause a crash if OSG or OpenGL tries to index off the
end of you color array.
Paul Martz
Skew Matrix Software LLC
http://www.skew-matrix.com
+1 303 859 9466
-Original Message-
From: osg-users-boun...@lists.openscenegraph.org
[mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Sergey
Sent: Saturday, April 18, 2009 8:47 AM
To: osg-users@lists.openscenegraph.org
Subject: Re: [osg-users] Dinamic Line Drawing
may be it depends on driver , but setUseDisplayList(false); works very
strange!!!
if I set it to false I get one direct line without color information and all
new vertices is drawn in (0,0,0).
Here my code and 2 screens differs only in one : in second screen line
linesGeom->setUseDisplayList(false); is commented
Any Idea?
CODE
-
class TglLine
{
public:
int ID;
TglLine(float X,float Y,float Z, QColor color);
~TglLine(void);
osg::Geode* Geode;
void addNode(float X,float Y,float Z, QColor color);
private:
osg::ref_ptr drawArrayLines ;
osg::ref_ptr vertexData ;
osg::ref_ptr colors ;
osg::ref_ptr linesGeom ;
};
//CONSTRUCTOR
TglLine::TglLine(float X,float Y,float Z, QColor color) {
//ALLOCATE MEMORY
drawArrayLines = new osg::DrawArrays(osg::PrimitiveSet::LINE_STRIP);
vertexData = new osg::Vec3Array;
linesGeom = new osg::Geometry();
Geode =new osg::Geode;
colors = new osg::Vec4Array;
vertexData->push_back(osg::Vec3(X,Y,Z));
drawArrayLines->setFirst(0);
drawArrayLines->setCount(vertexData->size());
linesGeom->addPrimitiveSet(drawArrayLines.get());
linesGeom->setVertexArray(vertexData.get());
linesGeom->setColorArray(colors);
linesGeom->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
// linesGeom->setUseDisplayList(false);
Geode->addDrawable(linesGeom.get());
}
// ADD NODE
void TglLine::addNode(float X,float Y,float Z, QColor color){
vertexData->push_back(osg::Vec3(X,Y,Z));
colors->push_back(osg::Vec4(color.red(),color.green(),color.blue(),
color.alphaF()));
drawArrayLines->setFirst(0);
int i =vertexData->size();
drawArrayLines->setCount(i);
linesGeom->dirtyBound();
}
//HERE my call
TglLine *test_line=new TglLine::TglLine(0,0,0,QColor(255,255,255,255));
root->addChild(test_line->Geode);
QColor col= QColor(255,0,255,100);
test_line->addNode(0,0,5000, col);
test_line->addNode(1, 1, 1, col);
test_line->addNode(-1, -1, -1, col);
test_line->addNode(-1, 300, -1, col);
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Re: [osg-users] Dinamic Line Drawing
may be it depends on driver , but setUseDisplayList(false); works very
strange!!!
if I set it to false I get one direct line without color information and all
new vertices is drawn in (0,0,0).
Here my code and 2 screens differs only in one : in second screen line
linesGeom->setUseDisplayList(false); is commented
Any Idea?
CODE
-
class TglLine
{
public:
int ID;
TglLine(float X,float Y,float Z, QColor color);
~TglLine(void);
osg::Geode* Geode;
void addNode(float X,float Y,float Z, QColor color);
private:
osg::ref_ptr drawArrayLines ;
osg::ref_ptr vertexData ;
osg::ref_ptr colors ;
osg::ref_ptr linesGeom ;
};
//CONSTRUCTOR
TglLine::TglLine(float X,float Y,float Z, QColor color)
{
//ALLOCATE MEMORY
drawArrayLines = new osg::DrawArrays(osg::PrimitiveSet::LINE_STRIP);
vertexData = new osg::Vec3Array;
linesGeom = new osg::Geometry();
Geode =new osg::Geode;
colors = new osg::Vec4Array;
vertexData->push_back(osg::Vec3(X,Y,Z));
drawArrayLines->setFirst(0);
drawArrayLines->setCount(vertexData->size());
linesGeom->addPrimitiveSet(drawArrayLines.get());
linesGeom->setVertexArray(vertexData.get());
linesGeom->setColorArray(colors);
linesGeom->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
// linesGeom->setUseDisplayList(false);
Geode->addDrawable(linesGeom.get());
}
// ADD NODE
void TglLine::addNode(float X,float Y,float Z, QColor color){
vertexData->push_back(osg::Vec3(X,Y,Z));
colors->push_back(osg::Vec4(color.red(),color.green(),color.blue(),
color.alphaF()));
drawArrayLines->setFirst(0);
int i =vertexData->size();
drawArrayLines->setCount(i);
linesGeom->dirtyBound();
}
//HERE my call
TglLine *test_line=new TglLine::TglLine(0,0,0,QColor(255,255,255,255));
root->addChild(test_line->Geode);
QColor col= QColor(255,0,255,100);
test_line->addNode(0,0,5000, col);
test_line->addNode(1, 1, 1, col);
test_line->addNode(-1, -1, -1, col);
test_line->addNode(-1, 300, -1, col);
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Re: [osg-users] Dinamic Line Drawing
I'm guessing that I have about 10,000 vertices or a little more. I stopped the app after 4500 had been displayed and the line was 1/2 drawn. Thx for the note, too, on dirtyBound(). I didn't really know what it did or what it meant so I threw in a comment for myself as a reminder that it did what I needed. Do I need the call to dirtyDisplayList() too, you think? Brian R Hill wrote: > Allen, > > Your code has the following line: > > m_ogeomTrailGeometry->dirtyBound(); // forces redraw > > dirtyBound does not force a redraw. It simply recalculates the bounding > volume for the geometry. The problem you were having before was that the > geometry was being clipped because the bounding volume was incorrect. > > Your performance issues can be due to a number of things. > > How many verts do you have? > > Brian > Allen -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=10338#10338 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dinamic Line Drawing
Allen,
Your code has the following line:
m_ogeomTrailGeometry->dirtyBound(); // forces redraw
dirtyBound does not force a redraw. It simply recalculates the bounding
volume for the geometry. The problem you were having before was that the
geometry was being clipped because the bounding volume was incorrect.
Your performance issues can be due to a number of things.
How many verts do you have?
Brian
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-osg-users-boun...@lists.openscenegraph.org wrote: -
To: osg-users@lists.openscenegraph.org
From: "Allen Saucier"
Sent by: osg-users-boun...@lists.openscenegraph.org
Date: 04/16/2009 05:05PM
Subject: Re: [osg-users] Dinamic Line Drawing
Thx everyone!! for the help. :D :D You've given me a lot to think about.
I really appreciate your time.
J-S, here's my code that now works but still "drags" a little after a few
thousand iterations. I found that setVertexArray is (I believe, but could
be totally wrong) actually "copying" the array I send it. After a few
thousand times of being called, it really slows down my entire interface.
In fact, my interface Almost crawls to a halt calling setVertexArray() each
time through the frame loop after about 4000 calls to it.
And I'm drawing a LOT of small line segments each millisecond to make up
the long "looking" line.
I'm not using vertex buffer objects... yet. if I need to switch to them, I
will. Though that will be in the land of experimentation for me too. ha,
ha,... :-)
I found that dirtyDisplayList() w.o dirtyBound() did nothing. I found that
dirtyBound() worked all by itself to get the line to draw during each
iteration of my osg::viewer::frame loop.
I'm using osg::PrimitiveSet::LINE_STRIP as my primitive type and I do not
need to push_back 2 vertices per line segment - I think. [Embarassed] At
least, my line is being drawn... :)
Honestly, I think it's the way I'm drawing the line. I don't believe there
is a bug in OSG. I'm just to new @ this stuff.. ha, ha...
here's my code: snippets of it: the 2 main methods w/in my class are 1)
setup my line and 2) then to add to that line one new vertex at a time.
This code actually works but it does 'slow' down after a few thousand
iterations and then speeds up.. and slows down and speeds up...
class COsgPaxNodeSceneElementInfo
{
osg::ref_ptr m_podreTrailDrawElements;
osg::ref_ptr m_ov3aLineVerticesData;
osg::ref_ptr m_ogeomTrailGeometry;
osg::ref_ptr m_ogeoTrailGeode;
osg::Vec3d m_ov3dPrevPos; ///<
previous trail head
bool m_bHasTrail;
void m_vConstructATrail(math::Vector3D &p_v3dVec);
void m_vUpdateTrail(model::PlatformStateVector &p_psvState);
};
void COsgPaxNodeSceneElementInfo::m_vConstructATrail(math::Vector3D
&p_v3dVec)
{
// initialize previous to current point/position sent in
m_ov3dPrevPos.set(p_v3dVec.getX(), p_v3dVec.getY(), p_v3dVec.getZ());
// curr pos
osg::Vec3d ov3d(p_v3dVec.getX(), p_v3dVec.getY(), p_v3dVec.getZ()););
// ALLOCATE ONCE AND ONLY ONCE
m_podreTrailDrawElements= new osg::DrawArrays
(osg::PrimitiveSet::LINE_STRIP);
m_ov3aLineVerticesData = new osg::Vec3Array();
m_ogeomTrailGeometry= new osg::Geometry();
m_ogeoTrailGeode= new osg::Geode;
m_ov3aLineVerticesData->push_back(m_ov3dPrevPos); // prev pos
m_ov3aLineVerticesData->push_back(ov3d); // curr pos
m_podreTrailDrawElements->setFirst(0);
m_podreTrailDrawElements->setCount(m_ov3aLineVerticesData->size());
m_ogeomTrailGeometry->addPrimitiveSet(m_podreTrailDrawElements.get());
m_ogeomTrailGeometry->setVertexArray(m_ov3aLineVerticesData.get());
// attempt to draw lines faster by disabling display lists &
// then with each new vertex added, call dirtyBound() on the geometry.
m_ogeomTrailGeometry->setUseDisplayList(false);
m_ogeoTrailGeode->addDrawable(m_ogeomTrailGeometry.get());
// ADD ONLY ONCE to the Node Scene
m_no3vViewer->m_iAddElementToScene(m_ogeoTrailGeode.get()); // equivalent
to root->addChild(m_ogeoTrailGeode.get()); but "root" of the osg node
scene is actually located w/in another class object, not this one.
// keep track of fact that this node scene elem has a trail
m_bHasTrail = true;
} // m_vConstructATrail
void COsgPaxNodeSceneElementInfo::m_vUpdateTrail(
model::PlatformStateVector &p_psvState)
{
if (!m_bHasTrail)
return;
static bool b_trailIsShowing=true; // trails on be default
static double x,y,z;
x=p_psvState.getPos
Re: [osg-users] Dinamic Line Drawing
Thx everyone!! for the help. :D :D You've given me a lot to think about. I
really appreciate your time.
J-S, here's my code that now works but still "drags" a little after a few
thousand iterations. I found that setVertexArray is (I believe, but could be
totally wrong) actually "copying" the array I send it. After a few thousand
times of being called, it really slows down my entire interface. In fact, my
interface Almost crawls to a halt calling setVertexArray() each time through
the frame loop after about 4000 calls to it.
And I'm drawing a LOT of small line segments each millisecond to make up the
long "looking" line.
I'm not using vertex buffer objects... yet. if I need to switch to them, I
will. Though that will be in the land of experimentation for me too. ha,
ha,... :-)
I found that dirtyDisplayList() w.o dirtyBound() did nothing. I found that
dirtyBound() worked all by itself to get the line to draw during each iteration
of my osg::viewer::frame loop.
I'm using osg::PrimitiveSet::LINE_STRIP as my primitive type and I do not need
to push_back 2 vertices per line segment - I think. [Embarassed] At least, my
line is being drawn... :)
Honestly, I think it's the way I'm drawing the line. I don't believe there is
a bug in OSG. I'm just to new @ this stuff.. ha, ha...
here's my code: snippets of it: the 2 main methods w/in my class are 1) setup
my line and 2) then to add to that line one new vertex at a time. This code
actually works but it does 'slow' down after a few thousand iterations and then
speeds up.. and slows down and speeds up...
class COsgPaxNodeSceneElementInfo
{
osg::ref_ptr m_podreTrailDrawElements;
osg::ref_ptr m_ov3aLineVerticesData;
osg::ref_ptr m_ogeomTrailGeometry;
osg::ref_ptr m_ogeoTrailGeode;
osg::Vec3d m_ov3dPrevPos; ///< previous
trail head
bool m_bHasTrail;
void m_vConstructATrail(math::Vector3D &p_v3dVec);
void m_vUpdateTrail(model::PlatformStateVector &p_psvState);
};
void COsgPaxNodeSceneElementInfo::m_vConstructATrail(math::Vector3D &p_v3dVec)
{
// initialize previous to current point/position sent in
m_ov3dPrevPos.set(p_v3dVec.getX(), p_v3dVec.getY(), p_v3dVec.getZ());
// curr pos
osg::Vec3d ov3d(p_v3dVec.getX(), p_v3dVec.getY(), p_v3dVec.getZ());
// ALLOCATE ONCE AND ONLY ONCE
m_podreTrailDrawElements= new osg::DrawArrays(osg::PrimitiveSet::LINE_STRIP);
m_ov3aLineVerticesData = new osg::Vec3Array();
m_ogeomTrailGeometry= new osg::Geometry();
m_ogeoTrailGeode= new osg::Geode;
m_ov3aLineVerticesData->push_back(m_ov3dPrevPos); // prev pos
m_ov3aLineVerticesData->push_back(ov3d); // curr pos
m_podreTrailDrawElements->setFirst(0);
m_podreTrailDrawElements->setCount(m_ov3aLineVerticesData->size());
m_ogeomTrailGeometry->addPrimitiveSet(m_podreTrailDrawElements.get());
m_ogeomTrailGeometry->setVertexArray(m_ov3aLineVerticesData.get());
// attempt to draw lines faster by disabling display lists &
// then with each new vertex added, call dirtyBound() on the geometry.
m_ogeomTrailGeometry->setUseDisplayList(false);
m_ogeoTrailGeode->addDrawable(m_ogeomTrailGeometry.get());
// ADD ONLY ONCE to the Node Scene
m_no3vViewer->m_iAddElementToScene(m_ogeoTrailGeode.get()); // equivalent to
root->addChild(m_ogeoTrailGeode.get()); but "root" of the osg node scene is
actually located w/in another class object, not this one.
// keep track of fact that this node scene elem has a trail
m_bHasTrail = true;
} // m_vConstructATrail
void COsgPaxNodeSceneElementInfo::m_vUpdateTrail(
model::PlatformStateVector &p_psvState)
{
if (!m_bHasTrail)
return;
static bool b_trailIsShowing=true; // trails on be default
static double x,y,z;
x=p_psvState.getPosition().getX();
y=p_psvState.getPosition().getY();
z=p_psvState.getPosition().getZ();
// for now, just keep current PTL around;
// unused @ moment, however
m_dPtl=p_psvState.getOrientation().getW();
m_ov3aLineVerticesData->push_back(osg::Vec3(x,y,z)); // prev pos
m_podreTrailDrawElements->setFirst(0);
m_podreTrailDrawElements->setCount(m_ov3aLineVerticesData->size());
m_ogeomTrailGeometry->dirtyBound(); // forces redraw
} // m_vUpdateTrail
Allen
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http://forum.openscenegraph.org/viewtopic.php?p=10322#10322
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Re: [osg-users] Dinamic Line Drawing
Hello Allen,
I've tried leaving setDisplayList (true) and calling the method
dirtyDisplayList() and not calling setVertexArray(vad). That doesn't work
either.
Nothing has worked so far except to call setVertexArray(vad);
Check the code to osg::Geometry::setVertexArray to see if it's doing
things you're not:
void Geometry::setVertexArray(Array* array)
{
_vertexData.array = array;
computeFastPathsUsed();
dirtyDisplayList();
dirtyBound();
if (_useVertexBufferObjects && array)
addVertexBufferObjectIfRequired(array);
}
The important parts in your case are dirtyDisplayList() and
dirtyBound()... If the old array pointer is the same as the new one,
then _vertexData.array = array will just reassign the same value.
computeFastPathsUsed() doesn't change anything, it just sets a flag to
say whether you're on the OpenGL fast paths or not. And you're probably
not using vertex buffer objects (setUseDisplayList(false) +
setUseVertexBufferObject(false) (the default) = plain old vertex
buffers) so the last line is not executed for you.
The gist of it is:
1. In all cases, you need to add a vertex array, a normal array, a color
array and one or more primitiveset(s). (note that the normal and color
arrays can just contain one element with binding BIND_OVERALL)
2. For static geometry, you leave setUseDisplayList() set to true (the
default) and you're done. OSG will build the display list once, and
always draw using that display list afterwards.
3. For dynamic geometry, you'll setUseDisplayList(false) and modify the
vertices in the vertex array (either keep a ref_ptr to it or get the
pointer each time from the osg::Geometry object).
Note that if the geometry is updated only seldom (once per second, or
once per 30 seconds, for example) you could leave
setUseDisplayList(true) (the default) and call dirtyDisplayList() when
you change the vertices in the vertex array. But nowadays, there's
little advantage to using display lists even for static or "almost
static" geometry - they're even being deprecated in OpenGL 3.0.
So to sum up, you need to set the vertex array in your initial setup,
and then either dirtyDisplayList() in your update (draw line) code or
setUseDisplayList(false) in your initial setup.
If it still doesn't work for you, send us some repro code. Check out the
osggeometry example to see if you're doing things like that example, and
if not, modify it to match your code, see if you can reproduce your
results, and send it to us.
In my mind, the method, dirtyDisplayList() should 1) dirty my display list 2)
rebuild it and therefore during the next draw sequence of the viewer, the line
should be drawn. But that simply is not the case.
Yes it is. That's it exactly. If that doesn't work for you, send us some
repro code.
My best guess is: Some flag w/in the Geometry/Drawable is not being set to "dirty" and
some flag is not being set to "redaw" once the Geometry/Drawable is dirty. That's the
nearest I can tell.
That code path is being used every day by a very large number of
programmers in a very large number of software programs (it's a very
common thing to do), so I'm pretty sure if it were broken we'd know. :-)
Nevertheless, with a small example that shows what you're doing, we
might be able to see more clearly if there's a bug or if there's
something missing in your usage.
Hope this helps,
J-S
--
__
Jean-Sebastien Guayjean-sebastien.g...@cm-labs.com
http://www.cm-labs.com/
http://whitestar02.webhop.org/
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Re: [osg-users] Dinamic Line Drawing
What type of primitive (mode) is in your DrawArrays? If it's GL_LINES then obviously you'll need to add 2 vertices to draw an additional line segment. Other than that I don't know what the problem is. Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com +1 303 859 9466 -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Allen Saucier Sent: Thursday, April 16, 2009 10:27 AM To: osg-users@lists.openscenegraph.org Subject: Re: [osg-users] Dinamic Line Drawing Well, it didntt work for me. :-( I'm actaully calling osg::viewer::frame() a few 100x / ms, I turned off DisplayLists for the geometry, did not call setVertexArray(vad), did not call dirtyDisplayList() and the line is not being drawn at all now. I've tried leaving setDisplayList (true) and calling the method dirtyDisplayList() and not calling setVertexArray(vad). That doesn't work either. Nothing has worked so far except to call setVertexArray(vad); In my mind, the method, dirtyDisplayList() should 1) dirty my display list 2) rebuild it and therefore during the next draw sequence of the viewer, the line should be drawn. But that simply is not the case. My best guess is: Some flag w/in the Geometry/Drawable is not being set to "dirty" and some flag is not being set to "redaw" once the Geometry/Drawable is dirty. That's the nearest I can tell. Do you have any more suggestions? [Question] Thx code to "draw line" after initial setup -- osg::Vec3Array *vad = dynamic_cast (m_ogeomTrailGeometry->getVertexArray()); vad->push_back(osg::Vec3(x,y,z)); osg::DrawArrays *drArrys = dynamic_cast (m_ogeomTrailGeometry->getPrimitiveSet(0)); drArrys->setFirst(0); drArrys->setCount(vad->size()); m_ogeomTrailGeometry->dirtyDisplayList(); // doesn't work // m_ogeomTrailGeometry->setVertexArray(vad); // works when uncommented Paul Martz wrote: > If you use osgViewer::Viewer::run(), then you're rendering constantly > and don't need to do anything else to tell it to redraw. > > If you're using osgViewer::Viewer::frame(), then you need to call that > function. > > Paul Martz > Skew Matrix Software LLC > http://www.skew-matrix.com > +1 303 859 9466 > > -Original Message- > From: > [mailto:] On Behalf Of Allen > Saucier > Sent: Thursday, April 16, 2009 8:03 AM > To: > Subject: Re: Dinamic Line Drawing > > Wow, that easy? ha, ha... > > Paul, how does the "system" know when to redraw after I've added to > the vertices? Don't I have to tell it to redraw after I've added a > vertex and up'ed the vertex counter? > > -vertex counter == osg::DrawArrays *vad; -new vertices added to *vad > w/ > push_back() cmd > > > Paul Martz wrote: > > > setUseDisplayLists( false ). > > > > Paul Martz > > Skew Matrix Software LLC > > http://www.skew-matrix.com > > +1 303 859 9466 > > > > -Original Message- > > From: > > [mailto:] On Behalf Of Allen > > Saucier > > Sent: Wednesday, April 15, 2009 3:44 PM > > To: > > Subject: Re: Dinamic Line Drawing > > > > Thanks Paul! I didn't understand that in the previous postings. > > Would you mind telling me how to "disable" the display listings for > > this > > > geometry? > > > > > > > ** PAUL wrote *** > > Your geometry is probably using display lists (on by default). > > setVertexArray will dirty and rebuild them. A more efficient > > solution would be to disable display lists. If you do that, you > > should be able to change individual elements of your array and not > > have to set the entire > > > array. > > > > > Paul Martz > > Skew Matrix Software LLC > > http://www.skew-matrix.com > > +1 303 859 9466 > > > > > > > > Allen > > > > -- > > Read this topic online here: > > http://forum.openscenegraph.org/viewtopic.php?p=10279#10279 > > > > > > > > > > > > ___ > > osg-users mailing list > > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph. > > org > > > > ___ > > osg-users mailing list > > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph. > > org > > > > -- > > Post generated by Mail2Forum > > > >
Re: [osg-users] Dinamic Line Drawing
Your bounding volume may not be correct. Try calling dirtyBound(). Brian This is a PRIVATE message. If you are not the intended recipient, please delete without copying and kindly advise us by e-mail of the mistake in delivery. NOTE: Regardless of content, this e-mail shall not operate to bind CSC to any order or other contract unless pursuant to explicit written agreement or government initiative expressly permitting the use of e-mail for such purpose. • -osg-users-boun...@lists.openscenegraph.org wrote: - To: osg-users@lists.openscenegraph.org From: "Allen Saucier" Sent by: osg-users-boun...@lists.openscenegraph.org Date: 04/16/2009 12:26PM Subject: Re: [osg-users] Dinamic Line Drawing Well, it didntt work for me. :-( I'm actaully calling osg::viewer::frame() a few 100x / ms, I turned off DisplayLists for the geometry, did not call setVertexArray(vad), did not call dirtyDisplayList() and the line is not being drawn at all now. I've tried leaving setDisplayList (true) and calling the method dirtyDisplayList() and not calling setVertexArray(vad). That doesn't work either. Nothing has worked so far except to call setVertexArray(vad); In my mind, the method, dirtyDisplayList() should 1) dirty my display list 2) rebuild it and therefore during the next draw sequence of the viewer, the line should be drawn. But that simply is not the case. My best guess is: Some flag w/in the Geometry/Drawable is not being set to "dirty" and some flag is not being set to "redaw" once the Geometry/Drawable is dirty. That's the nearest I can tell. Do you have any more suggestions? [Question] Thx code to "draw line" after initial setup -- osg::Vec3Array *vad = dynamic_cast (m_ogeomTrailGeometry->getVertexArray()); vad->push_back(osg::Vec3(x,y,z)); osg::DrawArrays *drArrys = dynamic_cast (m_ogeomTrailGeometry->getPrimitiveSet(0));:: drArrys->setFirst(0); drArrys->setCount(vad->size()); m_ogeomTrailGeometry->dirtyDisplayList(); // doesn't work> // m_ogeomTrailGeometry->setVertexArray(vad); // works when uncommented Paul Martz wrote: > If you use osgViewer::Viewer::run(), then you're rendering constantly and > don't need to do anything else to tell it to redraw. > > If you're using osgViewer::Viewer::frame(), then you need to call that > function. > > Paul Martz > Skew Matrix Software LLC > http://www.skew-matrix.com > +1 303 859 9466 > > -Original Message- > From: > [mailto:] On Behalf Of Allen > Saucier > Sent: Thursday, April 16, 2009 8:03 AM > To: > Subject: Re: Dinamic Line Drawing > > Wow, that easy? ha, ha... > > Paul, how does the "system" know when to redraw after I've added to the > vertices? Don't I have to tell it to redraw after I've added a vertex and > up'ed the vertex counter? > > -vertex counter == osg::DrawArrays *vad; -new vertices added to *vad w/ > push_back() cmd > > > Paul Martz wrote: > > > setUseDisplayLists( false ). > > > > Paul Martz > > Skew Matrix Software LLC > > http://www.skew-matrix.com > > +1 303 859 9466 > > > > -Original Message- > > From: > > [mailto:] On Behalf Of Allen > > Saucier > > Sent: Wednesday, April 15, 2009 3:44 PM > > To: > > Subject: Re: Dinamic Line Drawing > > > > Thanks Paul! I didn't understand that in the previous postings. > > Would you mind telling me how to "disable" the display listings for this > > > geometry? > > > > > > > ** PAUL wrote *** > > Your geometry is probably using display lists (on by default). > > setVertexArray will dirty and rebuild them. A more efficient solution > > would be to disable display lists. If you do that, you should be able > > to change individual elements of your array and not have to set the entire > > > array. > > > > > Paul Martz > > Skew Matrix Software LLC > > http://www.skew-matrix.com > > +1 303 859 9466 > > > > > > > > Allen > > > > -- > > Read this topic online here: > > http://forum.openscenegraph.org/viewtopic.php?p=10279#10279 > > > > > > > > > > > > ___ > > osg-users mailing list > > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph. > > org > > > > ___ > > osg-users mailing list > > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph. > > org > > > > -- >
Re: [osg-users] Dinamic Line Drawing
Well, it didntt work for me. :-( I'm actaully calling osg::viewer::frame() a few 100x / ms, I turned off DisplayLists for the geometry, did not call setVertexArray(vad), did not call dirtyDisplayList() and the line is not being drawn at all now. I've tried leaving setDisplayList (true) and calling the method dirtyDisplayList() and not calling setVertexArray(vad). That doesn't work either. Nothing has worked so far except to call setVertexArray(vad); In my mind, the method, dirtyDisplayList() should 1) dirty my display list 2) rebuild it and therefore during the next draw sequence of the viewer, the line should be drawn. But that simply is not the case. My best guess is: Some flag w/in the Geometry/Drawable is not being set to "dirty" and some flag is not being set to "redaw" once the Geometry/Drawable is dirty. That's the nearest I can tell. Do you have any more suggestions? [Question] Thx code to "draw line" after initial setup -- osg::Vec3Array *vad = dynamic_cast (m_ogeomTrailGeometry->getVertexArray()); vad->push_back(osg::Vec3(x,y,z)); osg::DrawArrays *drArrys = dynamic_cast (m_ogeomTrailGeometry->getPrimitiveSet(0)); drArrys->setFirst(0); drArrys->setCount(vad->size()); m_ogeomTrailGeometry->dirtyDisplayList(); // doesn't work // m_ogeomTrailGeometry->setVertexArray(vad); // works when uncommented Paul Martz wrote: > If you use osgViewer::Viewer::run(), then you're rendering constantly and > don't need to do anything else to tell it to redraw. > > If you're using osgViewer::Viewer::frame(), then you need to call that > function. > > Paul Martz > Skew Matrix Software LLC > http://www.skew-matrix.com > +1 303 859 9466 > > -Original Message- > From: > [mailto:] On Behalf Of Allen > Saucier > Sent: Thursday, April 16, 2009 8:03 AM > To: > Subject: Re: Dinamic Line Drawing > > Wow, that easy? ha, ha... > > Paul, how does the "system" know when to redraw after I've added to the > vertices? Don't I have to tell it to redraw after I've added a vertex and > up'ed the vertex counter? > > -vertex counter == osg::DrawArrays *vad; -new vertices added to *vad w/ > push_back() cmd > > > Paul Martz wrote: > > > setUseDisplayLists( false ). > > > > Paul Martz > > Skew Matrix Software LLC > > http://www.skew-matrix.com > > +1 303 859 9466 > > > > -Original Message- > > From: > > [mailto:] On Behalf Of Allen > > Saucier > > Sent: Wednesday, April 15, 2009 3:44 PM > > To: > > Subject: Re: Dinamic Line Drawing > > > > Thanks Paul! I didn't understand that in the previous postings. > > Would you mind telling me how to "disable" the display listings for this > > > geometry? > > > > > > > ** PAUL wrote *** > > Your geometry is probably using display lists (on by default). > > setVertexArray will dirty and rebuild them. A more efficient solution > > would be to disable display lists. If you do that, you should be able > > to change individual elements of your array and not have to set the entire > > > array. > > > > > Paul Martz > > Skew Matrix Software LLC > > http://www.skew-matrix.com > > +1 303 859 9466 > > > > > > > > Allen > > > > -- > > Read this topic online here: > > http://forum.openscenegraph.org/viewtopic.php?p=10279#10279 > > > > > > > > > > > > ___ > > osg-users mailing list > > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph. > > org > > > > ___ > > osg-users mailing list > > > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph. > > org > > > > -- > > Post generated by Mail2Forum > > > > > > > Allen > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=10304#10304 > > > > > > ___ > osg-users mailing list > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > ___ > osg-users mailing list > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > -- > Post generated by Mail2Forum Allen -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=10315#10315 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dinamic Line Drawing
WOW! so simple. Excellent! Thxs Paul!:D Allen -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=10313#10313 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dinamic Line Drawing
If you use osgViewer::Viewer::run(), then you're rendering constantly and don't need to do anything else to tell it to redraw. If you're using osgViewer::Viewer::frame(), then you need to call that function. Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com +1 303 859 9466 -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Allen Saucier Sent: Thursday, April 16, 2009 8:03 AM To: osg-users@lists.openscenegraph.org Subject: Re: [osg-users] Dinamic Line Drawing Wow, that easy? ha, ha... Paul, how does the "system" know when to redraw after I've added to the vertices? Don't I have to tell it to redraw after I've added a vertex and up'ed the vertex counter? -vertex counter == osg::DrawArrays *vad; -new vertices added to *vad w/ push_back() cmd Paul Martz wrote: > setUseDisplayLists( false ). > > Paul Martz > Skew Matrix Software LLC > http://www.skew-matrix.com > +1 303 859 9466 > > -Original Message- > From: > [mailto:] On Behalf Of Allen > Saucier > Sent: Wednesday, April 15, 2009 3:44 PM > To: > Subject: Re: Dinamic Line Drawing > > Thanks Paul! I didn't understand that in the previous postings. > Would you mind telling me how to "disable" the display listings for this geometry? > > > ** PAUL wrote *** > Your geometry is probably using display lists (on by default). > setVertexArray will dirty and rebuild them. A more efficient solution > would be to disable display lists. If you do that, you should be able > to change individual elements of your array and not have to set the entire array. > > Paul Martz > Skew Matrix Software LLC > http://www.skew-matrix.com > +1 303 859 9466 > > > > Allen > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=10279#10279 > > > > > > ___ > osg-users mailing list > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph. > org > > ___ > osg-users mailing list > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph. > org > > -- > Post generated by Mail2Forum Allen -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=10304#10304 ___ 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] Dinamic Line Drawing
Wow, that easy? ha, ha... Paul, how does the "system" know when to redraw after I've added to the vertices? Don't I have to tell it to redraw after I've added a vertex and up'ed the vertex counter? -vertex counter == osg::DrawArrays *vad; -new vertices added to *vad w/ push_back() cmd Paul Martz wrote: > setUseDisplayLists( false ). > > Paul Martz > Skew Matrix Software LLC > http://www.skew-matrix.com > +1 303 859 9466 > > -Original Message- > From: > [mailto:] On Behalf Of Allen > Saucier > Sent: Wednesday, April 15, 2009 3:44 PM > To: > Subject: Re: Dinamic Line Drawing > > Thanks Paul! I didn't understand that in the previous postings. Would you > mind telling me how to "disable" the display listings for this geometry? > > > ** PAUL wrote *** > Your geometry is probably using display lists (on by default). > setVertexArray will dirty and rebuild them. A more efficient solution would > be to disable display lists. If you do that, you should be able to change > individual elements of your array and not have to set the entire array. > > Paul Martz > Skew Matrix Software LLC > http://www.skew-matrix.com > +1 303 859 9466 > > > > Allen > > -- > Read this topic online here: > http://forum.openscenegraph.org/viewtopic.php?p=10279#10279 > > > > > > ___ > osg-users mailing list > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > ___ > osg-users mailing list > > http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org > > -- > Post generated by Mail2Forum Allen -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=10304#10304 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dinamic Line Drawing
setUseDisplayLists( false ). Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com +1 303 859 9466 -Original Message- From: osg-users-boun...@lists.openscenegraph.org [mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Allen Saucier Sent: Wednesday, April 15, 2009 3:44 PM To: osg-users@lists.openscenegraph.org Subject: Re: [osg-users] Dinamic Line Drawing Thanks Paul! I didn't understand that in the previous postings. Would you mind telling me how to "disable" the display listings for this geometry? ** PAUL wrote *** Your geometry is probably using display lists (on by default). setVertexArray will dirty and rebuild them. A more efficient solution would be to disable display lists. If you do that, you should be able to change individual elements of your array and not have to set the entire array. Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com +1 303 859 9466 Allen -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=10279#10279 ___ 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] Dinamic Line Drawing
Thanks Paul! I didn't understand that in the previous postings. Would you mind telling me how to "disable" the display listings for this geometry? ** PAUL wrote *** Your geometry is probably using display lists (on by default). setVertexArray will dirty and rebuild them. A more efficient solution would be to disable display lists. If you do that, you should be able to change individual elements of your array and not have to set the entire array. Paul Martz Skew Matrix Software LLC http://www.skew-matrix.com +1 303 859 9466 Allen -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=10279#10279 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dinamic Line Drawing
Your geometry is probably using display lists (on by default).
setVertexArray will dirty and rebuild them. A more efficient solution would
be to disable display lists. If you do that, you should be able to change
individual elements of your array and not have to set the entire array.
Paul Martz
Skew Matrix Software LLC
http://www.skew-matrix.com
+1 303 859 9466
-Original Message-
From: osg-users-boun...@lists.openscenegraph.org
[mailto:osg-users-boun...@lists.openscenegraph.org] On Behalf Of Allen
Saucier
Sent: Wednesday, April 15, 2009 3:26 PM
To: osg-users@lists.openscenegraph.org
Subject: Re: [osg-users] Dinamic Line Drawing
boooch (and anyone who might have suggestions...),
I really appreciate the code you posted but I can't get it to work as you
did. The ONLY way I was able to get the "lines" drawn was to RE-set the
vertexArray of my geometry. Like so:
m_ogeomTrailGeometry->setVertexArray(vad);
However, this is an extremely expensive operation. Do you have any
suggestions that I might try to lower my re-draw expense?
Here's my code snippet:
class class1
{
public:
osg::ref_ptr m_podreTrailDrawElements;
osg::ref_ptr m_ov3aLineVerticesData;
osg::ref_ptr m_ogeomTrailGeometry;
osg::ref_ptr m_ogeoTrailGeode;
osg::Vec3d m_ov3dPrevPos;
}
class1::method_1(double xInitial, double yInitial, double zInitial) {
// initialize previous to current point/position sent in
m_ov3dPrevPos.set(xInitial, yInitial, zInitial);
// curr pos
osg::Vec3d ov3d(xInitial, yInitial, zInitial);
m_podreTrailDrawElements= new
osg::DrawArrays(osg::PrimitiveSet::LINE_STRIP);
m_ov3aLineVerticesData = new osg::Vec3Array();
m_ogeomTrailGeometry= new osg::Geometry();
m_ogeoTrailGeode= new osg::Geode;
m_ov3aLineVerticesData->push_back(m_ov3dPrevPos); // prev pos
m_ov3aLineVerticesData->push_back(ov3d); // curr pos
m_podreTrailDrawElements->setFirst(0);
m_podreTrailDrawElements->setCount(m_ov3aLineVerticesData->size());
m_ogeomTrailGeometry->addPrimitiveSet(m_podreTrailDrawElements.get());
m_ogeomTrailGeometry->setVertexArray(m_ov3aLineVerticesData.get());// add
line segs to geometry
m_ogeoTrailGeode->addDrawable(m_ogeomTrailGeometry.get());
// ADD ONLY ONCE to the Node Scene
m_no3vViewer->m_iAddElementToScene(m_ogeoTrailGeode.get());
} // method_1()
class1::method_updateLine(double x, double y, double z) {
osg::Vec3Array *vad = dynamic_cast(m_ogeomTrailGeometry->getVertexArray());
vad->push_back(osg::Vec3(x,y,z));
osg::DrawArrays *drArrys = dynamic_cast(m_ogeomTrailGeometry->getPrimitiveSet(0));
drArrys->setFirst(0);
drArrys->setCount(vad->size());
//drArrys->dirty();
//std::cout<<" vad->size()=="<< vad->size() << std::endl;
m_ogeomTrailGeometry->setVertexArray(vad);
}
Allen
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Re: [osg-users] Dinamic Line Drawing
boooch (and anyone who might have suggestions...),
I really appreciate the code you posted but I can't get it to work as you did.
The ONLY way I was able to get the "lines" drawn was to RE-set the vertexArray
of my geometry. Like so: m_ogeomTrailGeometry->setVertexArray(vad);
However, this is an extremely expensive operation. Do you have any suggestions
that I might try to lower my re-draw expense?
Here's my code snippet:
class class1
{
public:
osg::ref_ptr m_podreTrailDrawElements;
osg::ref_ptr m_ov3aLineVerticesData;
osg::ref_ptr m_ogeomTrailGeometry;
osg::ref_ptr m_ogeoTrailGeode;
osg::Vec3d m_ov3dPrevPos;
}
class1::method_1(double xInitial, double yInitial, double zInitial)
{
// initialize previous to current point/position sent in
m_ov3dPrevPos.set(xInitial, yInitial, zInitial);
// curr pos
osg::Vec3d ov3d(xInitial, yInitial, zInitial);
m_podreTrailDrawElements= new osg::DrawArrays(osg::PrimitiveSet::LINE_STRIP);
m_ov3aLineVerticesData = new osg::Vec3Array();
m_ogeomTrailGeometry= new osg::Geometry();
m_ogeoTrailGeode= new osg::Geode;
m_ov3aLineVerticesData->push_back(m_ov3dPrevPos); // prev pos
m_ov3aLineVerticesData->push_back(ov3d); // curr pos
m_podreTrailDrawElements->setFirst(0);
m_podreTrailDrawElements->setCount(m_ov3aLineVerticesData->size());
m_ogeomTrailGeometry->addPrimitiveSet(m_podreTrailDrawElements.get());
m_ogeomTrailGeometry->setVertexArray(m_ov3aLineVerticesData.get());// add
line segs to geometry
m_ogeoTrailGeode->addDrawable(m_ogeomTrailGeometry.get());
// ADD ONLY ONCE to the Node Scene
m_no3vViewer->m_iAddElementToScene(m_ogeoTrailGeode.get());
} // method_1()
class1::method_updateLine(double x, double y, double z)
{
osg::Vec3Array *vad = dynamic_cast(m_ogeomTrailGeometry->getVertexArray());
vad->push_back(osg::Vec3(x,y,z));
osg::DrawArrays *drArrys = dynamic_cast(m_ogeomTrailGeometry->getPrimitiveSet(0));
drArrys->setFirst(0);
drArrys->setCount(vad->size());
//drArrys->dirty();
//std::cout<<" vad->size()=="<< vad->size() << std::endl;
m_ogeomTrailGeometry->setVertexArray(vad);
}
Allen
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Re: [osg-users] Dinamic Line Drawing
thank you for advise . As Resume here my working code: Code: osg::Geometry* linesGeom = new osg::Geometry();// is my geometry osg::DrawArrays* drawArrayLines = new osg::DrawArrays(osg::PrimitiveSet::LINE_STRIP); linesGeom->addPrimitiveSet(drawArrayLines); osg::Vec3Array* vertexData = new osg::Vec3Array; linesGeom->setVertexArray(vertexData); osg::ref_ptr tmp_geode (new osg::Geode);// Greate test Geode tmp_geode->addDrawable(linesGeom); nazemTargetPathGroup->addChild(tmp_geode);// add geode to my osg::Group // ADD SOME VERTEX vertexData->push_back(osg::Vec3(0,0,0)); vertexData->push_back(osg::Vec3(0,0,5000)); vertexData->push_back(osg::Vec3(1, 1, 1)); vertexData->push_back(osg::Vec3(-1, -1, -1)); vertexData->push_back(osg::Vec3(-1, 300, -1)); drawArrayLines->setFirst(0); drawArrayLines->setCount(vertexData->size()); // NOW ADD NEW VERTEX: vertexData->push_back(osg::Vec3(100, 300, -1)); drawArrayLines->setFirst(0); drawArrayLines->setCount(vertexData->size()); -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=10019#10019 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dinamic Line Drawing
Rahul Jain wrote: > Hi Sergey, > > You must be creating a osg::Geometry, Right ? If yes then you can use > function osg::Vec3Array* vertexData = geom->getVertexArray(). Ones you > have vertexData you can add your new vertex as > vertexData->push_back(newVertex); > > cheers > RJ > > OK. But > > > Code: > osg::Vec3Array* vertexData = linesGeom->getVertexArray(); > > > > generates error: invalid conversion from `osg::Array*' to 'osg::Vec3Array*' > > -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=10017#10017 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dinamic Line Drawing
Hi Sergey, You must be creating a osg::Geometry, Right ? If yes then you can use function osg::Vec3Array* vertexData = geom->getVertexArray(). Ones you have vertexData you can add your new vertex as vertexData->push_back(newVertex); cheers RJ Sergey wrote: [quote="Rahul Jain"]Hi Sergey, You need to add your new vertices to the geometry vertex data and update the first and size of your primitive set which is drawing the line. thanx Rahul! One thing I cant find : how to fill drawArrayLines with new vertices -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=9982#9982 ___ 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] Dinamic Line Drawing
[quote="Rahul Jain"]Hi Sergey, You need to add your new vertices to the geometry vertex data and update the first and size of your primitive set which is drawing the line. thanx Rahul! One thing I cant find : how to fill drawArrayLines with new vertices -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=9982#9982 ___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dinamic Line Drawing
You probably don't need to call setFirst(0) every time, but it won't hurt either. Also, when dynamically changing geometry this way you need to manage display lists (either disable them or dirty them when changed) and you need to manage the bounding volume (either dirty them on change or override the computeBound() method). Brian > Date: Thu, 9 Apr 2009 18:13:07 +0530 > From: rah...@vizexperts.com > To: osg-users@lists.openscenegraph.org > Subject: Re: [osg-users] Dinamic Line Drawing > > Hi Sergey, > > You need to add your new vertices to the geometry vertex data and > update the first and size of your primitive set which is drawing the line. > > For example > > > osg::Geometry* geom // is your geometry > osg::DrawArrays* drawArrayLines = new > osg::DrawArrays(osg::PrimitiveSet::LINE_STRIP); // Is your line strip > Primitive set > > geom ->addPrimitiveSet(_drawArrayLines); // Add primitive set > > Whenever you have new vertex add the new vertex to the vertex array of > your geometry and call > > drawArrayLines->setFirst(0); > drawArrayLines->setCount( Num of vertex in your vertex array); > > > I Hope this will help you > > cheers > RJ > > > Sergey wrote: > > Hi, ALL > > How can I draw line , and append to this line new vertices (nodes) time > > after time? For example I need to draw a trajectory of moving object. > > In examples I have seen only static lines with determined count of vertices. > > > > Thank you. > > > > -- > > Read this topic online here: > > http://forum.openscenegraph.org/viewtopic.php?p=9969#9969 > > > > > > > > > > > > ___ > > 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 _ Quick access to your favorite MSN content and Windows Live with Internet Explorer 8. http://ie8.msn.com/microsoft/internet-explorer-8/en-us/ie8.aspx?ocid=B037MSN55C0701A___ osg-users mailing list osg-users@lists.openscenegraph.org http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
Re: [osg-users] Dinamic Line Drawing
Hi Sergey, You need to add your new vertices to the geometry vertex data and update the first and size of your primitive set which is drawing the line. For example osg::Geometry* geom // is your geometry osg::DrawArrays* drawArrayLines = new osg::DrawArrays(osg::PrimitiveSet::LINE_STRIP); // Is your line strip Primitive set geom ->addPrimitiveSet(_drawArrayLines); // Add primitive set Whenever you have new vertex add the new vertex to the vertex array of your geometry and call drawArrayLines->setFirst(0); drawArrayLines->setCount( Num of vertex in your vertex array); I Hope this will help you cheers RJ Sergey wrote: Hi, ALL How can I draw line , and append to this line new vertices (nodes) time after time? For example I need to draw a trajectory of moving object. In examples I have seen only static lines with determined count of vertices. Thank you. -- Read this topic online here: http://forum.openscenegraph.org/viewtopic.php?p=9969#9969 ___ 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
