> data interpolation given a 2d parameterization (terrain skinning) is > nothing at all like recovering a general 3d surface from scattered > points. the 3d version is a solved problem, but it's not done simply > (look into the siggraph proceedings from early-to-mid nineties for a > succession of methods, if you need scaring).
I have seen some of these documents and have come away felling beaten. > a reasonable hack for molecular rendering is to have your vertex > generator output a pmesh for each atom surface as a sphere, Jmol is a software rendering engine ... so in the standard rendering there is no 'vertex generator' for the atoms. For the work that I have been doing on surfaces, I have written code to generate tessellated spheres for purposes of generating a solvent accessible surface. > and let the > rendering engine's hidden surface removal solve the intersection > problem for you at render time, There is no hidden surface removal in the rendering engine ... because it normally does not generate triangles. > if you've got the graphics horsepower. > you could winnow out a few of the faces by doing inside/outside testing > for all vertices of a face, discarding any having all vertices inside, > but the render engine's going to do that for you anyway Unfortunately, that does not cut it. The Solvent Accessible Surface includes the space between the spheres where a 3rd sphere (the solvent) would fit. So the surface is a mixture of 3 shapes. - convex surfaces, the surfaces of the atoms that are exposed - concave surfaces, the spherical triangle formed when one sphere sits on top of 3 spheres - saddle surfaces, a portion of a torus formed when one sphere rolls around two other spheres. I can render each of these surfaces individually. I have not figured out how to stitch them together. Suggestions appreciated. Miguel ------------------------------------------------------- This SF.Net email is sponsored by: New Crystal Reports XI. Version 11 adds new functionality designed to reduce time involved in creating, integrating, and deploying reporting solutions. Free runtime info, new features, or free trial, at: http://www.businessobjects.com/devxi/728 _______________________________________________ Jmol-developers mailing list Jmol-developers@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/jmol-developers
