// react to keys
void keyboard(unsigned char k, int, int)
{
switch(k)
{
case 27: mgr = NULL;
gpcl_defaultmat = NULL;
gpcl_surface = NULL;
exit(1);
case 'y':
case 'z':
glPolygonMode( GL_FRONT_AND_BACK, GL_POINT);
std::cerr << "PolygonMode: Point." << std::endl;
break;
case 'x': glPolygonMode( GL_FRONT_AND_BACK, GL_LINE);
std::cerr << "PolygonMode: Line." << std::endl;
break;
case 'c': glPolygonMode( GL_FRONT_AND_BACK, GL_FILL);
std::cerr << "PolygonMode: Fill." << std::endl;
break;
case 'f': g_error *= 2;
std::cerr << "Error: " << g_error << std::endl;
gpcl_surface->setError( g_error );
// See comments about OSGSurface::forceTessellate() below
if(useForceTesselate)
gpcl_surface->forceTessellate();
break;
case 'g': g_error /= 2;
std::cerr << "Error: " << g_error << std::endl;
gpcl_surface->setError( g_error );
// See comments about OSGSurface::forceTessellate() below
if(useForceTesselate)
gpcl_surface->forceTessellate();
break;
case 'd': gpcl_surface->setIsDelaunay(!gpcl_surface->getIsDelaunay());
std::cerr << "Delaunay: " << gpcl_surface->getIsDelaunay()
<< std::endl;
// See comments about OSGSurface::forceTessellate() below
if(useForceTesselate)
gpcl_surface->forceTessellate();
break;
default: std::cerr << "y,z = Polygon Point Mode\n"
<< "x = Polygon Line Mode\n"
<< "c = Polygon Fill Mode\n"
<< "f/g = +/- Error\n"
<< "d = Delaunay on/off\n"
<< std::endl;
break;
}
}
OSG::NodeTransitPtr makeScene( void )
{
setupDefaultMaterial();
OSG::NodeTransitPtr root = OSG::Node ::create();
OSG::SurfaceRefPtr surface = OSG::Surface ::create();
OSG::GeoPnt3fPropertyRefPtr cps = OSG::GeoPnt3fProperty::create();
// control points should always be 3D for the time being,
// rational support will be added later
cps->clear();
cps->push_back( OSG::Pnt3f( 1, 1, 2 ));
cps->push_back( OSG::Pnt3f( 1, 0, 0 ));
cps->push_back( OSG::Pnt3f( 1, 0, 1 ));
cps->push_back( OSG::Pnt3f( 1, -1, -2 ));
cps->push_back( OSG::Pnt3f( 0, 1, 0 ));
cps->push_back( OSG::Pnt3f( 0, 0, 0 ));
cps->push_back( OSG::Pnt3f( 0, 0, 1 ));
cps->push_back( OSG::Pnt3f( 0, -1, 1 ));
cps->push_back( OSG::Pnt3f( 0, 1, 1 ));
cps->push_back( OSG::Pnt3f( 0, 0, 1 ));
cps->push_back( OSG::Pnt3f( 0, 0, 0 ));
cps->push_back( OSG::Pnt3f( 0, -1, 0 ));
cps->push_back( OSG::Pnt3f( -1, 1, 1 ));
cps->push_back( OSG::Pnt3f( -1, 0, 1 ));
cps->push_back( OSG::Pnt3f( -1, 0, 0 ));
cps->push_back( OSG::Pnt3f( -1, -1, 0 ));
// let's clear the trimming
surface->removeCurves();
// set up dimensions and knot vectors:
surface->setDimU( 3 );
surface->setDimV( 3 );
surface->editMFKnotsU()->clear();
surface->editMFKnotsU()->push_back( 0 );
surface->editMFKnotsU()->push_back( 0 );
surface->editMFKnotsU()->push_back( 0 );
surface->editMFKnotsU()->push_back( 0 );
surface->editMFKnotsU()->push_back( 1 );
surface->editMFKnotsU()->push_back( 1 );
surface->editMFKnotsU()->push_back( 1 );
surface->editMFKnotsU()->push_back( 1 );
surface->editMFKnotsV()->clear();
surface->editMFKnotsV()->push_back( 0 );
surface->editMFKnotsV()->push_back( 0 );
surface->editMFKnotsV()->push_back( 0 );
surface->editMFKnotsV()->push_back( 0 );
surface->editMFKnotsV()->push_back( 1 );
surface->editMFKnotsV()->push_back( 1 );
surface->editMFKnotsV()->push_back( 1 );
surface->editMFKnotsV()->push_back( 1 );
// set control points and texture control points
surface->setControlPoints( cps );
// set error
surface->setError( g_error );
// and finally set the material
surface->setMaterial( gpcl_defaultmat );
root->setCore( surface );
gpcl_surface = surface;
// Usually when the endEditCP() is called for an OSGSurface object
// the need for (re)tessellation is flagged, and when the object
// would be drawn on screen it gets tessellated. This might cause
// problems in a cluster environment as surfaces may get tessellated
// more than once (e.g. on the server and on each client) which can
// be _very_ slow and annoying.
//
// The solution is "forcing" the tessellation by calling
// OSGSurface::forceTessellate(). This will perform the tessellation
// immediately, and setup flags so that automatic tessellation will
// not be called again. This means that even if you change some or
// all of the surface descriptiong FieldContainersin your OSGSurface
// object it will _not_ be retessellated. You will have to "force"
// tessellation again by calling OSGSurface::forceTessellate() whenever
// you change something. See the calls in the keyboard() function
// above.
//
// If you don't do clustering, you can probably just forget about all
// this OSGSurface::forceTessellate() stuff (just like in the other
// Surface examples), it will just work automagically and tessellate
// your surface when needed (provided you don't forget the proper
// beginEditCP()/endEditCP() calls.
if(useForceTesselate)
gpcl_surface->forceTessellate();
return root;
}