[osg-users] generate height map using fractal
Robert Osfield
robert.osfield at gmail.com
Sun Mar 22 08:23:38 PDT 2009
HI Ajjad,
I don't have time to go chase online articles, but as a general note please
use osgTerrain for rendering terrain, node ShapeDrawable.
Robert.
2009/3/22 ami guru <dosto.walla at gmail.com>
> Hello forum,
>
> I have been using the Paul's article about generating terrain using
> fractals
>
> http://gameprogrammer.com/fractal.html
>
>
> I am populating the values in the osg height map structure.
>
>
> But The rendering is giving me a flat surface.
>
>
> I hope that Paul sees that as well.
>
> ********************************************
>
> osg::ref_ptr<osg::Geode> myTerrain = new osg::Geode;
>
> //Now load the terrain
>
> /*
> osg::ref_ptr<osg::Node> terrainNode
> (osgDB::readNodeFile("Terrain2.3ds"));
> terrainScaleMat->addChild(terrainNode.get());
> */
>
> //generate the 2D fractal
> float *heightData = alloc2DFractArray(512);
>
>
> //Define some constants for the fractal terrain
> static const float DEF_HEIGHT_SCALE = 0.1f;
> static float TILING_SURFACE = 3;
> int randomSeed = 1;
> float H = 0.3;
> float iteration = 10;
>
>
> fill2DFractArray (heightData,512, randomSeed,DEF_HEIGHT_SCALE,H);
>
> //using the height field
> osg::ref_ptr<osg::HeightField> heightMap = new osg::HeightField;
>
> //allocate the space for the height field
> heightMap->allocate(512,512);
>
> //populate the height map
> for(unsigned int i = 0; i < heightMap->getNumColumns();i++)
> {
> for(unsigned int j = 0; j < heightMap->getNumRows();j++)
> {
> int size = heightMap->getNumRows();
> heightMap->setHeight(i,j,heightData[(i*size)+j]);
>
> //std::cout << heightMap->getHeight(i,j) << std::endl;
> }
> }
>
> //now add the drawable to the terain
> myTerrain->addDrawable(new osg::ShapeDrawable(heightMap.get()));
>
>
>
>
> ********************************************
>
>
>
> Regards,
>
> Sajjad
>
> _______________________________________________
> osg-users mailing list
> osg-users at lists.openscenegraph.org
> http://lists.openscenegraph.org/listinfo.cgi/osg-users-openscenegraph.org
>
>
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openscenegraph.org/pipermail/osg-users-openscenegraph.org/attachments/20090322/73241ca5/attachment-0003.htm>
More information about the osg-users
mailing list