Josh Marshall wrote: > On 11/31/06, Fernando Perez <[EMAIL PROTECTED]> wrote: > > >> Fernando Perez wrote: >> ps - one more thing. This guy: >> >> http://blog.vrplumber.com/ >> >> has been rewriting the OpenGL bindings using ctypes, and I've seen >> posts from him about numpy (in his blog). He might be able to >> contribute something... >> ... > Now, I haven't spent much time looking at these parts of OpenGL- > ctypes, as they have just worked for me. I would think that it would > be trivial to write a FormatHandler which uses the ndarray interface > and data type description to use any object implenting it as an input > for OpenGL. This would include things such as PIL images. > Yes, this is the purpose of the design, to allow users to write new format handlers that can be registered at run-time and act as first-class data-formats within the system. PIL images, custom vector objects, memory-mapped files, media buffers and the like are all contemplated as useful array storage formats.
> Mike, can you give us your opinion on how a standardised data type > descriptor would be helpful for PyOpenGL? The PEP and some > information about it can be found here: > http://www.scipy.org/ArrayInterfacePEP > A standardised data-type descriptor would be of some benefit for us, as it would allow a single handler to deal with larger numbers of storage formats (reducing the amount of coding required). That said, the spec as proposed has far more features than *most* OpenGL users will use (OpenGL being largely (though not exclusively) focused on simple, homogeneous data-types), and the handler mechanism largely abstracts away the problem for *us* at the moment. We wouldn't be able to get rid of the abstraction mechanism entirely, as we would still have data-types such as lists-of-lists-of-integers that wouldn't support the protocol. The likely efficiency of accessing the metadata (versus current implementation where in some cases we wind up producing a whole dictionary object with meta-data just to pull out a single value) would be attractive. We also need functionality to get at the data-pointer for the objects to make any description useful, though I suppose that's out of scope for this particular PEP. HTH, Mike -- ________________________________________________ Mike C. Fletcher Designer, VR Plumber, Coder http://www.vrplumber.com http://blog.vrplumber.com ------------------------------------------------------------------------- Using Tomcat but need to do more? Need to support web services, security? Get stuff done quickly with pre-integrated technology to make your job easier Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642 _______________________________________________ Numpy-discussion mailing list Numpy-discussion@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/numpy-discussion
