I'm having some problems, each time i do the maths for each pixel (500x500) the cpu gonna very loaded doing the maths slowing the music...
then i tryied to use gl shader language, but i'm with some dificults because i'm new in shader and pd and GEM.... so i dont know where i can write the codes before render (init() codes)...

i tried write:
shader1 = new Glsl("hello.vert", "hello.frag");
at the construction method, because normaly is writen at main, but then the object in pd is cannot be created...

well maybe is a very confused post but if you can help me to do these render's maths in shader at this external it will be great...

these are the commands i use to compile the project:

gcc -c fractal.cpp -o fractal.o
ld -export-dynamic -shared -o teste.pd_linux fractal.o -lc -lm
and
sudo mv teste.pd_linux /usr/lib/pd-extended/extra/

thx if anyone can help...

hi there... i need to get the frequency from a music that i read from oggread... what objects can i use to get the frequency of the sounds??
i saved some piano notes C,G,E how can i get the frequency from one by one notes from that .ogg file???

thx

hi... i'm trying to do a helloworld external but i'm with some errors,
this is what i did so far:
i copied and paste the helloworld from how to do an external tutorial and tried to compile with following commands and respectives errors:

gcc -c helloworld.c -o helloworld.o
helloworld.c: In function ‘helloworld_setup’:
helloworld.c:19: warning: passing argument 1 of ‘class_new’ makes pointer from integer without a cast
/usr/include/pdextended/m_pd.h:423: note: expected ‘struct t_symbol *’ but argument is of type ‘int’

ld -export_dynamic -shared -o helloworld.pd_linux helloworld.o -lc -lm
ld: warning: cannot find entry symbol xport_dynamic; defaulting to 00000000000002a0

**because is just a warnings i tried to move this external to extra but when i try to create a helloworld object on pd says the simbol "gemsym" is not defined

so i found another comands to test:

gcc -DPD -O2 -Wall -W -Wshadow -Wstrict-prototypes -Wno-unused -Wno-parentheses -Wno-switch -I ./ -o helloworld.o -c helloworld.c

helloworld.c: In function ‘helloworld_setup’:
helloworld.c:16: warning: implicit declaration of function ‘gemsym’
helloworld.c:19: warning: passing argument 1 of ‘class_new’ makes pointer from integer without a cast
/usr/include/pdextended/m_pd.h:423: note: expected ‘struct t_symbol *’ but argument is of type ‘int’

gcc -bundle -undefined -suppress -flat_namespace -o helloworld.pd_darwin helloworld.o

cc: unrecognized option '-bundle'
cc: unrecognized option '-suppress'
/usr/bin/ld: warning: cannot find entry symbol _start; defaulting to 0000000008048220
helloworld.o: In function `helloworld_setup':
helloworld.c:(.text+0xe): undefined reference to `gemsym'
helloworld.c:(.text+0x3e): undefined reference to `class_new'
helloworld.c:(.text+0x53): undefined reference to `class_addbang'
helloworld.o: In function `helloworld_new':
helloworld.c:(.text+0x6f): undefined reference to `pd_new'
helloworld.o: In function `helloworld_bang':
helloworld.c:(.text+0x8f): undefined reference to `post'
collect2: ld returned 1 exit status

if someone can help with this... maybe i didnt install everything i need...
thx!!

hi, i'm trying to do a external using GEM, but i have no idea how to start, i tried to search for any tutorial but i didnt find anyone...

if anyone can write some simple code for me i'm very thankfull

what i'm trying to do first of all is something like this:

for(int y=0 ; y< GEMwidth; y++)
for(int x=0; x<GEMheight; x++)
{
glColor3f(0, 0, 1);
glBegin(GL_POINTS);
glVertex2i(x,y);
glEnd();
}

but on render of GEM in pd

a simple tutorial will help me a lot... thx

thx... i'll try...

got it.... but i still need how i get width and height from GEM window... if anyone knows plz let me know

thx a lot... it worked... well datailed help...