Hi Brian
Thanks for your answer
I have tested your code
On my hardware (Quadro FX 3500M, 2Gb Ram ..Windows Vista, OSG (64bit compiled))
The frame rate is 7 fps (80% memory using)
But in my case loading ply file..the main problem isn't the rendering
but the loading time (that takes hours...), the file's size is about
250Mb.
May be I wrong in writing my ply file plugin...
it reads from ply file and sets a geometry class:
osg::ref_ptr<Geode> geode = new osg::Geode();
osg::ref_ptr<Geometry> geometry = new osg::Geometry();
geode->addDrawable(geometry.get());
osg::ref_ptr<Vec4Array> colors=new osg::Vec4Array();
osg::ref_ptr<Vec3Array> verices = new osg::Vec3Array;
geometry->setVertexArray( vertices.get() );
geometry->setColorArray(colors.get());
geometry->setColorBinding(osg::Geometry::BIND_PER_VERTEX);
for(i=0;i<n_vertices;i++)
{
read from file in x y z r g b
vertices->push_back( osg::Vec3( x, y, z) );
colors->push_back(osg::Vec4(r,g,b,1.0f));
}
for(i=0;i<n_faces;i++)
{
read from file the connection list in index1 index2 index3
osg::ref_ptr<DrawElementsUInt> face=new osg::DrawElementsUInt
(osg::PrimitiveSet::TRIANGLES, 0);
face->push_back(index1);
face->push_back(index2);
face->push_back(index3);
geometry->addPrimitiveSet(face.get());
}
2008/4/21, Brian R Hill <[EMAIL PROTECTED]>:
> It's going to be dependent on your hardware and the osg structures you use.
>
> Try running this and the bring up the grid.ive in osgviewer. It generates
> 9.000.000 verts, 18.000.000 tris. On my box Win XP 4Gb Ram, Quadro FX 4600,
> it renders at 20 hz, using 1.3 Gb memory.
>
> Brian
>
> unsigned int num = 3000;
> osg::HeightField* grid = new osg::HeightField;
> grid->allocate(num,num);
> grid->setXInterval(1);
> grid->setYInterval(1);
>
> for(unsigned int rr=0;rr<num;++rr)
> {
> for(unsigned int cc=0;cc<num;++cc)
> {
> grid->setHeight(cc,rr,sin((float)(cc+rr)));
> }
> }
> osg::Geode * geode = new osg::Geode;
> geode->addDrawable(new osg::ShapeDrawable(grid));
>
> osgDB::writeNodeFile(*geode,"grid.ive");
>
>
> [EMAIL PROTECTED] wrote: -----
>
>
> To: [email protected]
> From: "fabio riot" <[EMAIL PROTECTED]>
> Sent by: [EMAIL PROTECTED]
> Date: 04/21/2008 10:35AM
> Subject: [osg-users] laser scanner file
>
> Hi all
> I'm new in OSG, so I need some advices to address my work.
> I need to visualize a large dimension laser scanner file (.ply).
> it contains about 6.000.000 of points and 12.000.000 of triangles
> (point's connections).
> I'm not able to view the entire file with a single node scenegraph
> (the program fails):
>
>
> osg::Node* node = NULL
> node = osgDB::readNodeFile("entire_file.ply"); //with my plugin
> osg::ref_ptr<osg::Group> root = new osg::Group();
> root->addChild(node);
> viewer....etc
>
>
> So I have broken the "laser cloud" in more little pieces
> (at example 12 pieces each one with 500.000 points and about 1.000.000
> triangles)
> and I have created a scenegraph with 12 node
>
>
> osg::ref_ptr<osg::Group> root = new osg::Group();new osg::Group();
> root->addChild(node1);
> root->addChild(node2);
>
> .....
>
> root->addChild(node12);
>
> where each node contains one pieces of data
>
> In this way I can load and view the all strucure...but the loading
> time is very very long (60 min)
>
> I'would like to know if this is the correct way to tackle my problem
> or if there's a clever way...Thanks
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