Re: [osg-users] laser scanner file

[Brian R Hill]

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: osg-users@lists.openscenegraph.org
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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