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Diffstat (limited to 'cyclone/sickle/trapezoid.c')
| -rw-r--r-- | cyclone/sickle/trapezoid.c | 105 |
1 files changed, 105 insertions, 0 deletions
diff --git a/cyclone/sickle/trapezoid.c b/cyclone/sickle/trapezoid.c new file mode 100644 index 0000000..b33cb02 --- /dev/null +++ b/cyclone/sickle/trapezoid.c @@ -0,0 +1,105 @@ +/* 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 TRAPEZOID_DEFUP 0.1 /* a bug? */ +#define TRAPEZOID_DEFDN 0.9 /* a bug? */ +#define TRAPEZOID_DEFLO 0.0 +#define TRAPEZOID_DEFHI 1.0 + +typedef struct _trapezoid +{ + t_sic x_sic; + float x_low; + float x_range; +} t_trapezoid; + +static t_class *trapezoid_class; + +static void trapezoid_lo(t_trapezoid *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 trapezoid_hi(t_trapezoid *x, t_floatarg f) +{ + x->x_range = f - x->x_low; +} + +/* LATER optimize */ +static t_int *trapezoid_perform(t_int *w) +{ + t_trapezoid *x = (t_trapezoid *)(w[1]); + int nblock = (int)(w[2]); + t_float *in1 = (t_float *)(w[3]); + t_float *in2 = (t_float *)(w[4]); + t_float *in3 = (t_float *)(w[5]); + t_float *out = (t_float *)(w[6]); + float low = x->x_low; + float range = x->x_range; + while (nblock--) + { + float ph = *in1++; + float upph = *in2++; + float dnph = *in3++; + /* CHECKED ph wrapped */ + if (ph < 0.) + ph -= (int)ph - 1.; + else if (ph > 1.) + ph -= (int)ph; + /* CHECKED upph, dnph clipped */ + if (upph < 0.) + upph = 0.; + else if (upph > 1.) /* CHECKME */ + upph = 1.; + if (dnph < upph) + dnph = upph; + else if (dnph > 1.) + dnph = 1.; + + if (ph < upph) + ph /= upph; + else if (ph < dnph) + ph = 1.; + else if (dnph < 1.) + ph = (1. - ph) / (1. - dnph); + else + ph = 0.; + *out++ = low + ph * range; + } + return (w + 7); +} + +static void trapezoid_dsp(t_trapezoid *x, t_signal **sp) +{ + dsp_add(trapezoid_perform, 6, x, sp[0]->s_n, + sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec, sp[3]->s_vec); +} + +static void *trapezoid_new(t_symbol *s, int ac, t_atom *av) +{ + t_trapezoid *x = (t_trapezoid *)pd_new(trapezoid_class); + sic_inlet((t_sic *)x, 1, TRAPEZOID_DEFUP, 0, ac, av); + sic_inlet((t_sic *)x, 2, TRAPEZOID_DEFDN, 1, ac, av); + outlet_new((t_object *)x, &s_signal); + x->x_low = TRAPEZOID_DEFLO; + x->x_range = (TRAPEZOID_DEFHI - TRAPEZOID_DEFLO); + return (x); +} + +void trapezoid_tilde_setup(void) +{ + trapezoid_class = class_new(gensym("trapezoid~"), + (t_newmethod)trapezoid_new, 0, + sizeof(t_trapezoid), 0, A_GIMME, 0); + sic_setup(trapezoid_class, trapezoid_dsp, SIC_FLOATTOSIGNAL); + class_addmethod(trapezoid_class, (t_method)trapezoid_lo, + gensym("lo"), A_DEFFLOAT, 0); /* CHECKME */ + class_addmethod(trapezoid_class, (t_method)trapezoid_hi, + gensym("hi"), A_DEFFLOAT, 0); /* CHECKME */ +} |