Cycling 74 » Topic: using jit.op in c

using jit.op in c

Thijs Koerselman — Mon, 12 Mar 2007 18:11:04 +0000

Is there anything special to know about the usage of jit.op in c? The
following code is not working, but doesn’t generate any errors either. The
output matrix seems to remain unchanged. Both in and out matrices are equal
and float32

-thijs

jit_atom_setsym(&atom, gensym(“+”));
object_attr_setvalueof(x->jit_op, gensym(“op”), 1, &atom);

jit_atom_setfloat(&atom, 0.015f);
object_attr_setvalueof(x->jit_op, gensym(“val”), 1, &atom);

jit_object_method(x->jit_op, gensym(“matrix_calc”), x->mx_in,
x->mx_out);

Re: using jit.op in c

Wesley Smith — Mon, 12 Mar 2007 18:27:30 +0000

>
> jit_atom_setsym(&atom, gensym(“+”));
> object_attr_setvalueof(x->jit_op, gensym(“op”), 1,
> &atom);

I would recommend using something like:

t_symbol *s[1];
s[1] = gensym(“+”);
jit_attr_setsym_array(x->jit_op, gensym(“op”), 1, opsyms);

>
> jit_atom_setfloat(&atom, 0.015f);
> object_attr_setvalueof(x->jit_op, gensym(“val”), 1,
> &atom);
>

Under the hood, jit.op is actually calling the setall method of a
matrix in this case as “val” is not a jit.op attribute but a max
wrapper attribute which is inaccessible except from the patcher.
Check out the jit.op project in the SDK for more details.

wes

Re: using jit.op in c

Thijs Koerselman — Tue, 13 Mar 2007 11:34:21 +0000

Thanks again! I got it.

> I would recommend using something like:
>
> t_symbol *s[1];
> s[1] = gensym(“+”);
> jit_attr_setsym_array(x->jit_op, gensym(“op”), 1, opsyms);

thanks for the tip. that makes sense. (if you correct the array name and
index that is ;-)

Under the hood, jit.op is actually calling the setall method of a
> matrix in this case as “val” is not a jit.op attribute but a max
> wrapper attribute which is inaccessible except from the patcher.
> Check out the jit.op project in the SDK for more details.

I used a 1×1 float32 matrix as the 2nd input, setting that one instead of
@val.

cheers, -thijs