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/* ------------------------- tilt --------------------------------------------- */
/* */
/* Monitor input for changes. */
/* Written by Olaf Matthes (olaf.matthes@gmx.de) */
/* Inspired by code written by Trond Lossius. */
/* Get source at http://www.akustische-kunst.org/puredata/maxlib/ */
/* */
/* This program is free software; you can redistribute it and/or */
/* modify it under the terms of the GNU General Public License */
/* as published by the Free Software Foundation; either version 2 */
/* of the License, or (at your option) any later version. */
/* */
/* This program is distributed in the hope that it will be useful, */
/* but WITHOUT ANY WARRANTY; without even the implied warranty of */
/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */
/* GNU General Public License for more details. */
/* */
/* You should have received a copy of the GNU General Public License */
/* along with this program; if not, write to the Free Software */
/* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* */
/* Based on PureData by Miller Puckette and others. */
/* */
/* ---------------------------------------------------------------------------- */
#include "m_pd.h"
#include <stdio.h>
#include <stdlib.h>
#define MAXSIZE 32
static char *version = "tilt v0.1, written by Olaf Matthes <olaf.matthes@gmx.de>";
typedef struct tilt
{
t_object x_ob;
t_outlet *x_out; /* result */
t_clock *x_clock;
t_float x_tilt; /* the result */
t_float x_start_tilt;
t_float x_t;
t_float x_sa;
t_float x_sb;
t_float x_offset;
t_float x_time;
t_float x_wait;
t_float x_hi_limit;
t_float x_low_limit;
t_float x_trip_point;
} t_tilt;
static void tilt_tick(t_tilt *x)
{
x->x_sb = x->x_t - x->x_offset;
if((x->x_sb - x->x_sa) > x->x_hi_limit)
{
x->x_sa = x->x_sb;
clock_delay(x->x_clock, x->x_wait);
return;
}
else
{
if((x->x_sb - x->x_sa) > x->x_trip_point)
{
outlet_bang(x->x_out);
clock_delay(x->x_clock, x->x_wait);
return;
}
if((x->x_sb - x->x_sa) < x->x_low_limit)
{
x->x_time++;
if(x->x_time > 15)
{
x->x_start_tilt = x->x_sa;
x->x_time = 0;
}
}
if((x->x_sb - x->x_start_tilt) > x->x_tilt)
{
outlet_bang(x->x_out);
clock_delay(x->x_clock, x->x_wait);
}
else
{
x->x_sa = x->x_sb;
clock_delay(x->x_clock, x->x_wait);
return;
}
}
}
static void tilt_float(t_tilt *x, t_floatarg f)
{
x->x_t = f;
}
static void tilt_intv(t_tilt *x, t_floatarg f)
{
x->x_wait = f;
}
static void tilt_tilt(t_tilt *x, t_floatarg f)
{
x->x_tilt = f;
post("tilt: set tilt to %g", x->x_tilt);
}
static void tilt_hi_limit(t_tilt *x, t_floatarg f)
{
x->x_hi_limit = f;
post("tilt: set high limit to %g", x->x_hi_limit);
}
static void tilt_low_limit(t_tilt *x, t_floatarg f)
{
x->x_low_limit = f;
post("tilt: set low limit to %g", x->x_low_limit);
}
static void tilt_trip_point(t_tilt *x, t_floatarg f)
{
x->x_trip_point = f;
post("tilt: set trip point to %g", x->x_trip_point);
}
static void tilt_free(t_tilt *x)
{
clock_free(x->x_clock);
}
static t_class *tilt_class;
static void *tilt_new(t_floatarg f, t_floatarg f2)
{
int i;
t_tilt *x = (t_tilt *)pd_new(tilt_class);
inlet_new(&x->x_ob, &x->x_ob.ob_pd, gensym("float"), gensym("intv"));
x->x_out = outlet_new(&x->x_ob, gensym("float"));
x->x_clock = clock_new(x, (t_method)tilt_tick);
x->x_t = f; /* set initial value */
if(f2 > 4)
x->x_wait = f2;
else
x->x_wait = 4000;
x->x_offset = 0;
x->x_sa = 0;
x->x_sb = 0;
x->x_time = 0;
x->x_tilt = 0;
x->x_start_tilt = x->x_sa = x->x_t - x->x_offset;
x->x_hi_limit = x->x_low_limit = x->x_trip_point = 0;
clock_delay(x->x_clock, x->x_wait); /* wait 4 sec and start calculation */
#ifndef MAXLIB
post(version);
#endif
post("tilt: set interval to %g msec", x->x_wait);
return (void *)x;
}
void tilt_setup(void)
{
tilt_class = class_new(gensym("tilt"), (t_newmethod)tilt_new,
(t_method)tilt_free, sizeof(t_tilt), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
class_addfloat(tilt_class, tilt_float);
class_addmethod(tilt_class, (t_method)tilt_intv, gensym("intv"), A_FLOAT, 0);
class_addmethod(tilt_class, (t_method)tilt_tilt, gensym("tilt"), A_FLOAT, 0);
class_addmethod(tilt_class, (t_method)tilt_hi_limit, gensym("hi"), A_FLOAT, 0);
class_addmethod(tilt_class, (t_method)tilt_low_limit, gensym("low"), A_FLOAT, 0);
class_addmethod(tilt_class, (t_method)tilt_trip_point, gensym("trip"), A_FLOAT, 0);
class_sethelpsymbol(tilt_class, gensym("maxlib/help-tilt.pd"));
}
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