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November 2008

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Re: [cl-opengl-devel] cl-opengl/gl/types.lisp not define new classes
by Luís Oliveira 27 Nov '08

27 Nov '08

Hello. On Tue, Nov 25, 2008 at 3:16 AM, gusti <ggh.develop(a)gmail.com> wrote: > I'm trying to use the cl-opengl packages in my linux with clisp but I found > that the file cl-opengl/gl/types.lisp doesn't define the new class that must > do. Works for me on Linux with CLISP 2.46, latest CFFI and latest cl-opengl. What version are you using? > For example, see the command line below: > [118]> (cffi:define-foreign-type ensure-integer () > () > (:actual-type :int) > (:simple-parser ensure-integer)) > ENSURE-INTEGER > > instead of define a class as for example: > [119]> (defclass mi-clase () () ) > #<STANDARD-CLASS MI-CLASE> If you have a look at the macroexpansion you'll see that DEFINE-FOREIGN-TYPE doesn't indeed define a new class. [4]> (macroexpand '(cffi:define-foreign-type ensure-integer () () (:actual-type :int) (:simple-parser ensure-integer))) (EVAL-WHEN (:COMPILE-TOPLEVEL :LOAD-TOPLEVEL :EXECUTE) (DEFCLASS ENSURE-INTEGER (CFFI::ENHANCED-FOREIGN-TYPE) NIL (:DEFAULT-INITARGS :ACTUAL-TYPE '(:INT))) (CFFI:DEFINE-PARSE-METHOD ENSURE-INTEGER (&REST CFFI::ARGS) (APPLY #'MAKE-INSTANCE 'ENSURE-INTEGER CFFI::ARGS)) 'ENSURE-INTEGER) ; T You can also confirm that through FIND-CLASS: [7]> (cffi:define-foreign-type ensure-integer () () (:actual-type :int) (:simple-parser ensure-integer)) ENSURE-INTEGER [8]> (find-class 'ensure-integer) #<STANDARD-CLASS ENSURE-INTEGER> > So after that, obviously, the 'defmethod translate-to-foreign' fail, see > below: > [120]> (defmethod translate-to-foreign (value (type ensure-integer)) > (truncate value)) > > *** - FIND-CLASS: ENSURE-INTEGER does not name a class > The following restarts are available: > ABORT :R1 ABORT > Break 1 [121]> [9]> (defmethod cffi:translate-to-foreign (value (type ensure-integer)) (truncate value)) #<STANDARD-METHOD (#<BUILT-IN-CLASS T> #<STANDARD-CLASS ENSURE-INTEGER>)> > Do you know what is the problem? Can you help me please? My guess is that you're using a *very* old version of CFFI. Latest is 0.10.3. HTH. -- Luís Oliveira http://student.dei.uc.pt/~lmoliv/

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[cl-opengl-devel] Good morning ..
by Greg Bennett 22 Nov '08

22 Nov '08

from Greg Bennett. With assistance from the CFFI list I have managed to run the OpenGL example files in cl-glut-examples.lisp, which makes me very relieved. By reading the example files I can collect quite a bit of information about syntax but I would clearly be better off if I had documentation of a more formal and organised variety. In the materials on cl-opengl which I downloaded I can find only the stub of documentation, for example the .pdf includes a disclaimer and then only chapter headings. I tried to build things from gendocs.sh and managed to create only that same stub. It seems I am missing the text files to fill those chapters. If those are available, I would appreciate a pointer to them. Since I am relatively new to linux it is quite likely that I simply don't (yet) know where to find such things. Thx for any and all advice and assistance. Cheers /Greg Bennett

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