Hello, I'm not a C expert but I see errors in your code ----- "Rick T" <[email protected]> a écrit :
> Greetings All > > > I'm having trouble getting my external to work, It compiles with 5 > warnings > sineq.c:48: warning: unused variable ‘x’ > sineq.c:49: warning: unused variable ‘in1’ > sineq.c:50: warning: unused variable ‘in2’ > sineq.c:51: warning: unused variable ‘in3’ > sineq.c:52: warning: unused variable ‘in4’ > in http://iem.at/pd/externals-HOWTO/node6.html it's not a t_float but a t_sample for using those variables > > It does a "make" successfully but I get this warning message > /usr/bin/ld: warning: cannot find entry symbol xport_dynamic; > defaulting to 00000000000007f0 > it's certainly caused by your makefile during linking, it's rather export_dynamic, you've certainly made a typo ^^ > > but when I try and add it in PD it says "couldn't create". I've looked > at the pan~ tutorial and the d_osc.c file as recommended, which did > help. I tried to take pieces from the two which I thought were > applicable to my situation but I'm still having some issues. > maybe a little look into bassmu~ source code could also be interesting > > Here's a link to the workflow (dropbox) > http://dl.dropbox.com/u/6576402/questions/pd/Sine_EQ_Diagram.jpg > > > Here's a link to the C code online (pastebin) > http://pastebin.com/9rK3szUE > > > > > My external is a reproduction of the sinewave equation with 4 inputs > and one output my logic is to have 4 inlets one for the > frequency,amplitude,phase and vertical offset and an output for the > created signal. Granted this isn't the final equation but this will > help me understand how to create the full equation once done. If you > want to see the full equation I'll be using here's a link to it below. > Basically it's a 1 second periodic signal with the sample rate at > 44100 which the equation gives me control over the > frequency,amplitude,phase and vertical offset, which will be > controlled by a usb midi controller. > > > Another question I have is what do I use for the t (time) for my final > equation is that the t_sample object in PD? or do I need to create a > for loop counting from 1-44100 for a 1 second 44100 sampled equation? > > > http://dl.dropbox.com/u/6576402/questions/eq1.txt > > > > > PS: I'm compiling on ubuntu 10.04 using gcc > > On Sun, Sep 4, 2011 at 12:13 PM, Martin Peach < > [email protected] > wrote: > > > On 2011-09-04 16:52, Rick T wrote: > ... > > > > > I've been able to find instructions on how to create a hello world > C-external but not one that creates a simple sine wave from a sinewave > equation like A*sin(w*t+p) > ( https://secure.wikimedia.org/ wikipedia/en/wiki/Sine_wave ) Does > anyone > have one or know where to find one. > > The canonical reference is here: > http://iem.at/pd/externals- HOWTO/node6.html > You just need to plug your equation into the perform routine. > Also check the source for osc~ in d_osc.c of the Pd source, which uses > a fancy 32-bit float cosine table scanning method that was useful when > it mattered but is getting obsolete as a call to sin() is probably > just as fast nowadays. > > Martin > > > > > > > _______________________________________________ > Pd-dev mailing list > [email protected] > http://lists.puredata.info/listinfo/pd-dev -- Patrice Colet _______________________________________________ Pd-dev mailing list [email protected] http://lists.puredata.info/listinfo/pd-dev
