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/* Copyright (c) 2002-2003 krzYszcz and others.
* For information on usage and redistribution, and for a DISCLAIMER OF ALL
* WARRANTIES, see the file, "LICENSE.txt," in this distribution. */
#include "m_pd.h"
#include "sickle/sic.h"
#define TRIANGLE_DEFPHASE 0.5
#define TRIANGLE_DEFLO -1.0
#define TRIANGLE_DEFHI 1.0
typedef struct _triangle
{
t_sic x_sic;
float x_low;
float x_range;
} t_triangle;
static t_class *triangle_class;
static void triangle_lo(t_triangle *x, t_floatarg f)
{
float high = x->x_low + x->x_range;
x->x_low = f;
x->x_range = high - x->x_low;
}
static void triangle_hi(t_triangle *x, t_floatarg f)
{
x->x_range = f - x->x_low;
}
/* LATER optimize */
static t_int *triangle_perform(t_int *w)
{
t_triangle *x = (t_triangle *)(w[1]);
int nblock = (int)(w[2]);
t_float *in1 = (t_float *)(w[3]);
t_float *in2 = (t_float *)(w[4]);
t_float *out = (t_float *)(w[5]);
float low = x->x_low;
float range = x->x_range;
while (nblock--)
{
float ph = *in1++;
float peakph = *in2++;
/* CHECKED ph wrapped */
if (ph < 0.)
ph -= (int)ph - 1.;
else if (ph > 1.)
ph -= (int)ph;
/* CHECKED peakph clipped */
if (peakph < 0.)
peakph = 0.;
else if (peakph > 1.)
peakph = 1.;
if (ph < peakph)
ph /= peakph;
else if (peakph < 1.)
ph = (1. - ph) / (1. - peakph);
else
ph = 0.;
*out++ = low + ph * range;
}
return (w + 6);
}
static void triangle_dsp(t_triangle *x, t_signal **sp)
{
dsp_add(triangle_perform, 5, x, sp[0]->s_n,
sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec);
}
static void *triangle_new(t_symbol *s, int ac, t_atom *av)
{
t_triangle *x = (t_triangle *)pd_new(triangle_class);
sic_inlet((t_sic *)x, 1, TRIANGLE_DEFPHASE, 0, ac, av);
outlet_new((t_object *)x, &s_signal);
x->x_low = TRIANGLE_DEFLO;
x->x_range = (TRIANGLE_DEFHI - TRIANGLE_DEFLO);
return (x);
}
void triangle_tilde_setup(void)
{
triangle_class = class_new(gensym("triangle~"),
(t_newmethod)triangle_new, 0,
sizeof(t_triangle), 0, A_GIMME, 0);
sic_setup(triangle_class, triangle_dsp, SIC_FLOATTOSIGNAL);
class_addmethod(triangle_class, (t_method)triangle_lo,
gensym("lo"), A_DEFFLOAT, 0); /* CHECKED */
class_addmethod(triangle_class, (t_method)triangle_hi,
gensym("hi"), A_DEFFLOAT, 0); /* CHECKED */
}
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