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; }
OSG::NodeTransitPtr makeScene( void ) { setupDefaultMaterial(); // Let's create two untrimmed surfaces that lie beside each other. // Even if the tessellation error is set to be the same for // both surfaces, due to numerical instabilities and sampling errors // small one pixel gaps will appear. By reducing the error you can // make most gaps disappear, but there will be still some left, even // if you reduce the error to be extremely small -- and as a sideeffect // the tessellation time plus the triangle count will explode. // You can try this by supplying the '-nofb' switch and // reducing the error by the 'g' key during rendering. // Of course if you set different tessellation errors (generally the // case when using view-dependent LOD algorithms) the gaps // will be a lot more visible. Try the '-nofb' and '-de' switches, and // play around with different errors using the 'f' and 'g' // keys for the first surface, and the 'h' and 'j' keys for the // second surface. // // Note that this is not a very good example for the Fat Borders as // the surfaces are untrimmed, and they are also very nice numerically // (real world models are usually much worse) and a basic uniform // tessellation would probably get rid of the gaps (which are not very // visible in the first place due to the nice properties of these // surfaces). Note also that if you set too high errors or // radically different errors, the spike-through artifacts of the // Fat Borders will appear. // We will hopefully come up with a better example later. :-) OSG::NodeTransitPtr root = OSG::Node::create(); OSG::NodeRefPtr surf1 = OSG::Node::create(); OSG::NodeRefPtr surf2 = OSG::Node::create(); root->setCore( OSG::Group::create() ); root->addChild( surf1 ); root->addChild( surf2 ); OSG::SurfaceRefPtr surface1 = OSG::Surface ::create(); OSG::GeoPnt3fPropertyRefPtr cps1 = OSG::GeoPnt3fProperty::create(); cps1->clear(); cps1->push_back( OSG::Pnt3f( 1, -1, 0 )); cps1->push_back( OSG::Pnt3f( 1, 0, 0 )); cps1->push_back( OSG::Pnt3f( 1, 0, 1 )); cps1->push_back( OSG::Pnt3f( 1, 1, 1 )); cps1->push_back( OSG::Pnt3f( 0, -1, 0 )); cps1->push_back( OSG::Pnt3f( 0, 0, 0 )); cps1->push_back( OSG::Pnt3f( 0, 0, 1 )); cps1->push_back( OSG::Pnt3f( 0, 1, 1 )); cps1->push_back( OSG::Pnt3f( 0, -1, 1 )); cps1->push_back( OSG::Pnt3f( 0, 0, 1 )); cps1->push_back( OSG::Pnt3f( 0, 0, 0 )); cps1->push_back( OSG::Pnt3f( 0, 1, 0 )); cps1->push_back( OSG::Pnt3f( -1, -1, 1 )); cps1->push_back( OSG::Pnt3f( -1, 0, 1 )); cps1->push_back( OSG::Pnt3f( -1, 0, 0 )); cps1->push_back( OSG::Pnt3f( -1, 1, 0 )); OSG::SurfaceRefPtr surface2 = OSG::Surface ::create(); OSG::GeoPnt3fPropertyRefPtr cps2 = OSG::GeoPnt3fProperty::create(); cps2->clear(); cps2->push_back( OSG::Pnt3f( 5, -2, 2 )); cps2->push_back( OSG::Pnt3f( 4, -1, 2 )); cps2->push_back( OSG::Pnt3f( 3, 0, 0 )); cps2->push_back( OSG::Pnt3f( 5, 1, 0 )); cps2->push_back( OSG::Pnt3f( 2, -1, 1 )); cps2->push_back( OSG::Pnt3f( 2, 0, 1 )); cps2->push_back( OSG::Pnt3f( 2, 0, 0 )); cps2->push_back( OSG::Pnt3f( 2, 1, 0 )); cps2->push_back( OSG::Pnt3f( 2, -1, 0 )); cps2->push_back( OSG::Pnt3f( 2, 0, 0 )); cps2->push_back( OSG::Pnt3f( 2, 0, 1 )); cps2->push_back( OSG::Pnt3f( 2, 1, 1 )); cps2->push_back( OSG::Pnt3f( 1, -1, 0 )); cps2->push_back( OSG::Pnt3f( 1, 0, 0 )); cps2->push_back( OSG::Pnt3f( 1, 0, 1 )); cps2->push_back( OSG::Pnt3f( 1, 1, 1 )); std::vector<OSG::Real64> knots1; std::vector<OSG::Pnt2f > points; knots1.clear(); knots1.push_back(0); knots1.push_back(0); knots1.push_back(1); knots1.push_back(1); // first, let's clear the trimming surface1->removeCurves(); // add simple outer trimming around the domain points.clear(); points.push_back( OSG::Pnt2f(0,0) ); points.push_back( OSG::Pnt2f(1,0) ); surface1->addCurve( 1, knots1, points, true ); points.clear(); points.push_back( OSG::Pnt2f(1,0) ); points.push_back( OSG::Pnt2f(1,1) ); surface1->addCurve( 1, knots1, points, false ); points.clear(); points.push_back( OSG::Pnt2f(1,1) ); points.push_back( OSG::Pnt2f(0,1) ); surface1->addCurve( 1, knots1, points, false ); points.clear(); points.push_back( OSG::Pnt2f(0,1) ); points.push_back( OSG::Pnt2f(0,0) ); surface1->addCurve( 1, knots1, points, false ); // set up dimensions and knot vectors: surface1->setDimU( 3 ); surface1->setDimV( 3 ); surface1->editMFKnotsU()->clear(); surface1->editMFKnotsU()->push_back( 0 ); surface1->editMFKnotsU()->push_back( 0 ); surface1->editMFKnotsU()->push_back( 0 ); surface1->editMFKnotsU()->push_back( 0 ); surface1->editMFKnotsU()->push_back( 1 ); surface1->editMFKnotsU()->push_back( 1 ); surface1->editMFKnotsU()->push_back( 1 ); surface1->editMFKnotsU()->push_back( 1 ); surface1->editMFKnotsV()->clear(); surface1->editMFKnotsV()->push_back( 0 ); surface1->editMFKnotsV()->push_back( 0 ); surface1->editMFKnotsV()->push_back( 0 ); surface1->editMFKnotsV()->push_back( 0 ); surface1->editMFKnotsV()->push_back( 1 ); surface1->editMFKnotsV()->push_back( 1 ); surface1->editMFKnotsV()->push_back( 1 ); surface1->editMFKnotsV()->push_back( 1 ); // set control points surface1->setControlPoints( cps1 ); // set error surface1->setError( g_error1 ); // and finally set the material surface1->setMaterial( gpcl_defaultmat ); // first, let's clear the trimming surface2->removeCurves(); // add simple outer trimming around the domain points.clear(); points.push_back( OSG::Pnt2f(1,0) ); points.push_back( OSG::Pnt2f(2,0) ); surface2->addCurve( 1, knots1, points, true ); points.clear(); points.push_back( OSG::Pnt2f(2,0) ); points.push_back( OSG::Pnt2f(2,1) ); surface2->addCurve( 1, knots1, points, false ); points.clear(); points.push_back( OSG::Pnt2f(2,1) ); points.push_back( OSG::Pnt2f(1,1) ); surface2->addCurve( 1, knots1, points, false ); points.clear(); points.push_back( OSG::Pnt2f(1,1) ); points.push_back( OSG::Pnt2f(1,0) ); surface2->addCurve( 1, knots1, points, false ); // set up dimensions and knot vectors: surface2->setDimU( 3 ); surface2->setDimV( 3 ); surface2->editMFKnotsU()->clear(); surface2->editMFKnotsU()->push_back( 1 ); surface2->editMFKnotsU()->push_back( 1 ); surface2->editMFKnotsU()->push_back( 1 ); surface2->editMFKnotsU()->push_back( 1 ); surface2->editMFKnotsU()->push_back( 2 ); surface2->editMFKnotsU()->push_back( 2 ); surface2->editMFKnotsU()->push_back( 2 ); surface2->editMFKnotsU()->push_back( 2 ); surface2->editMFKnotsV()->clear(); surface2->editMFKnotsV()->push_back( 0 ); surface2->editMFKnotsV()->push_back( 0 ); surface2->editMFKnotsV()->push_back( 0 ); surface2->editMFKnotsV()->push_back( 0 ); surface2->editMFKnotsV()->push_back( 1 ); surface2->editMFKnotsV()->push_back( 1 ); surface2->editMFKnotsV()->push_back( 1 ); surface2->editMFKnotsV()->push_back( 1 ); // set control points surface2->setControlPoints( cps2 ); // set error surface2->setError( g_error2 ); // and finally set the material surface2->setMaterial( gpcl_defaultmat ); surf1->setCore( surface1 ); surf2->setCore( surface2 ); gpcl_surface1 = surface1; gpcl_surface2 = surface2; return root; }
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, 0 )); cps->push_back( OSG::Pnt3f( 1, 0, 0 )); cps->push_back( OSG::Pnt3f( 1, 0, 1 )); cps->push_back( OSG::Pnt3f( 1, -1, 1 )); 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 )); std::vector<OSG::Real64> knots1; std::vector<OSG::Real64> knots2; std::vector<OSG::Pnt2f> points; knots1.clear(); knots1.push_back(0); knots1.push_back(0); knots1.push_back(1); knots1.push_back(1); knots2.clear(); knots2.push_back(0); knots2.push_back(0); knots2.push_back(0); knots2.push_back(1); knots2.push_back(1); knots2.push_back(1); // first, let's clear the trimming surface->removeCurves(); // add the outer trimming around the domain points.clear(); points.push_back( OSG::Pnt2f(0,0) ); points.push_back( OSG::Pnt2f(1,0) ); surface->addCurve( 1, knots1, points, true ); points.clear(); points.push_back( OSG::Pnt2f(1,0) ); points.push_back( OSG::Pnt2f(1,1) ); surface->addCurve( 1, knots1, points, false ); points.clear(); points.push_back( OSG::Pnt2f(1,1) ); points.push_back( OSG::Pnt2f(0,1) ); surface->addCurve( 1, knots1, points, false ); points.clear(); points.push_back( OSG::Pnt2f(0,1) ); points.push_back( OSG::Pnt2f(0,0) ); surface->addCurve( 1, knots1, points, false ); // add inner trimming loop 1 points.clear(); points.push_back( OSG::Pnt2f(0.3f,0.5f) ); points.push_back( OSG::Pnt2f(0.1f,0.9f) ); points.push_back( OSG::Pnt2f(0.5f,0.7f) ); surface->addCurve( 2, knots2, points, true ); points.clear(); points.push_back( OSG::Pnt2f(0.5f,0.7f) ); points.push_back( OSG::Pnt2f(0.9f,0.9f) ); points.push_back( OSG::Pnt2f(0.7f,0.5f) ); surface->addCurve( 2, knots2, points, false ); points.clear(); points.push_back( OSG::Pnt2f(0.7f,0.5f) ); points.push_back( OSG::Pnt2f(0.9f,0.1f) ); points.push_back( OSG::Pnt2f(0.5f,0.3f) ); surface->addCurve( 2, knots2, points, false ); points.clear(); points.push_back( OSG::Pnt2f(0.5f,0.3f) ); points.push_back( OSG::Pnt2f(0.1f,0.1f) ); points.push_back( OSG::Pnt2f(0.3f,0.5f) ); surface->addCurve( 2, knots2, points, false ); // add inner trimming loop 2 points.clear(); points.push_back( OSG::Pnt2f(0.4f,0.5f) ); points.push_back( OSG::Pnt2f(0.4f,0.4f) ); points.push_back( OSG::Pnt2f(0.5f,0.4f) ); surface->addCurve( 2, knots2, points, true ); points.clear(); points.push_back( OSG::Pnt2f(0.5f,0.4f) ); points.push_back( OSG::Pnt2f(0.6f,0.4f) ); points.push_back( OSG::Pnt2f(0.6f,0.5f) ); surface->addCurve( 2, knots2, points, false ); points.clear(); points.push_back( OSG::Pnt2f(0.6f,0.5f) ); points.push_back( OSG::Pnt2f(0.6f,0.6f) ); points.push_back( OSG::Pnt2f(0.5f,0.6f) ); surface->addCurve( 2, knots2, points, false ); points.clear(); points.push_back( OSG::Pnt2f(0.5f,0.6f) ); points.push_back( OSG::Pnt2f(0.4f,0.6f) ); points.push_back( OSG::Pnt2f(0.4f,0.5f) ); surface->addCurve( 2, knots2, points, false ); // 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; return root; }