On Sun, Mar 10, 2013 at 06:24:34PM -0500, Bart Botta wrote: Hi,
thank you for your reply! [...] > Most of the problem is https://github.com/3b/cl-opengl/issues/27 (glaref > and (setf glaref) are slow). > > Another problem is that the compiler doesn't know what types the values > are, so has to call generic math routines instead of using CPU ops directly. > > Storing the source arrays as specialized lisp arrays, and declaring types > (and/or check-type) would help with both problems, though writing to the > gl-array would still be slow until that bug is fixed. You could work around > the bug by using cffi:mem-aref directly instead of glaref, I have just replaced all glaref calls with: (cffi:mem-aref (gl::gl-array-pointer array) :float offset) and the results are surprisingly good! seconds | gc | consed | calls | sec/call | name ---------------------------------------------------- 3.924 | 0.000 | 0 | 2,500 | 0.001569 | CL-GL-UTILS:LERP-GL-ARRAY ---------------------------------------------------- 3.924 | 0.000 | 0 | 2,500 | | Total > or if you are > using shaders, you could just do the interpolation on the GPU. That's a good idea indeed! My fault is that i still stick with the old fixed pipeline opengl paradigm. Thank you for your help! C. _______________________________________________ cl-opengl-devel mailing list cl-opengl-devel@common-lisp.net http://lists.common-lisp.net/cgi-bin/mailman/listinfo/cl-opengl-devel
