Thanks for taking the time to answer. I understand the concepts of blending normals and the importance of vertex ordering in terms of normal generation.
Is vertex ordering important to PyMol CGOs (after normals have already been generated).? My ray traced images look good, however, they can only be displayed during ray tracing. If you have time, can you give me an example of a triangle primitive (not begin, triangles, end) that can be displayed without having to ray trace it.... The point is, I would like to be able to see the surface while I am rotating it. Thanks again. - Mike -----Original Message----- From: Warren L. DeLano [mailto:war...@delanoscientific.com] Sent: Tuesday, June 03, 2003 6:15 PM To: 'Mike Brown'; pymol-users@lists.sourceforge.net Subject: RE: [PyMOL] CGOs and TRIANGLE primitive Mike, Triangle rendering isn't as simple as you might think -- you need to make sure your triangles have the correct handedness (vertex ordering), and if you are trying to create a surface, then you need to blend the normals at each vertex. I left transparent CGOs out of this release...perhaps in the next version -- I'll need to in order to make cartoons transparent, which is a planned enhancement. For now, you're probably out of luck, unless you call OpenGL Directly via PyOpenGL. Cheers, Warren -- mailto:war...@delanoscientific.com Warren L. DeLano Principal Scientist DeLano Scientific LLC Voice (650)-346-1154 Fax (650)-593-4020 -----Original Message----- From: pymol-users-ow...@lists.sourceforge.net [mailto:pymol-users-ow...@lists.sourceforge.net] On Behalf Of Mike Brown Sent: Sunday, June 01, 2003 11:26 AM To: pymol-users@lists.sourceforge.net Subject: [PyMOL] CGOs and TRIANGLE primitive I am developing software for lead optimization that analyzes the differences between multiple enzymes implicated in drug targets. I wanted to implement some method for visualization of these differences and PyMol seemed like an ideal tool for rendering since it is already capable of displaying molecular structures and accepts outside graphics objects. I am having trouble rendering triangulated surfaces using CGO's however (Please know that I am no expert in computer graphics). When the CGO contains the triangles/normals in the BEGIN, TRIANGLES, ... , END format, the surface is displayed, but is very "angular" and ray tracing does not smooth the edges. When the CGO uses TRIANGLE primitives instead, the surface is ray traced very nicely, but cannot be seen until it is ray traced. When I rotate the surface, it disappears again. Also, it would be nice if there was a method by which I could make the surfaces loaded as a CGO transparent. Any help would be GREATLY appreciated. Thanks for your time. - Mike ------------------------------------------------------- This SF.net email is sponsored by: eBay Get office equipment for less on eBay! http://adfarm.mediaplex.com/ad/ck/711-11697-6916-5 _______________________________________________ PyMOL-users mailing list PyMOL-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/pymol-users
