----- "Rick T" <[email protected]> a écrit : > On Fri, Sep 9, 2011 at 2:46 PM, Patrice Colet < [email protected] > > wrote: > > > 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 > > > > True but the variables in my external are floats not samples like in > the example pan~ which takes in 2 different signals. I'm taking in 4 > different floats (numbers) >
Allright, maybe you should directly name your variables amp freq phase and vertoff instead of in1 in2 in3 and in4 > > > > > > 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 ^^ > > > > I thought so to but when I take a look at the make file it looks fine > here's a link to the code in (pastebin) > Okay, in fact you should write: -Wl,-export-dynamic to pass it with gcc > > > > 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 > > > > Do you know the name for the source file or know where I can find it? > I typed in bassmu~ > in PD and nothing came back. > ah sorry I've made a typo :D it's bassemu~ you can get it in pd-extended externals sources > > > > > > > > > > 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 > > > > Aloha > and thanks for the help every bit helps -- -- Patrice Colet _______________________________________________ Pd-dev mailing list [email protected] http://lists.puredata.info/listinfo/pd-dev
