static void hook (MpParametricSurfaceDef &def, Scene &scene, void *ptr)
{
// the viewing window is passed as argument
ViewWindow &view = *(ViewWindow*)ptr;
Material gold(0.3, ColorF(1.0,0.84,0.0), 0.5, 1.8);
scene.SetFacetMaterial(gold);
cout << scene.GetNumFacets() << " Facets, " // print some memory information
<< 0.001*scene.GetMemoryUsage() << " KByte allocated" << endl;
float x0,x1,y0,y1,z0,z1; // get extent of scene in space
scene.Extent(x0,x1,y0,y1,z0,z1);
float dist = MpMax(x1-x0,y1-y0,z1-z0), // distance parameter
ax = (x1+x0)/2, ay = (y1+y0)/2, az = (z1+z0)/2,
cx = 1.4*dist+ax, cy = 1.2*dist+ay, cz = 1.0*dist+az;
scene.Look(Vector3D(cx,cy,cz), // camera position vector
Vector3D(-cx+ax,-cy+ay,-cz+az), // look direction vector
FieldOfView(40), // field of view angle in degree
0); // "twist your head" angle in degree
MpImage& image = *(view.canvas->image); // access scroll window's image
scene.Open(image); // direct drawing to raster image
//scene.SetViewPort(30,30,size-60,size-60); // if omitted viewport is whole image
scene.SetGlobalShading(Facet::Gouraud);
// surface shading (None, Flat, Gouraud, ...)
scene.SetGlobalEdgeLines(Facet::Individual); // edgeline drawing option
scene.SetBackground(ColorF(0.3,0.6,0.9)); // draw background with RGB color
scene.SetColor(ColorF(0,0,0)); // define color for edge lines
scene.Show(); // render the surface
scene.Close(); // call always after close
view.MpScrollImageWindow::Configure(image); // update new scroll window image
// to make our image visible
}
