1 files changed, 62 insertions, 0 deletions
diff --git a/cyclone/sickle/kink.c b/cyclone/sickle/kink.c
new file mode 100644
index 0000000..86bc81d
--- /dev/null
+++ b/cyclone/sickle/kink.c
@@ -0,0 +1,62 @@
+/* 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.  */
+
+/* CHECKED negative float in 2nd inlet: "illegal slope value %f",
+   but no complaints for signal input -- this is impossible in Pd.
+   The only thing we could do (and a bit stupid one) would be to
+   clock this exception out from the perf routine. */
+
+#include "m_pd.h"
+#include "sickle/sic.h"
+
+#define KINK_DEFSLOPE  1.0
+
+typedef t_sic t_kink;
+static t_class *kink_class;
+
+static t_int *kink_perform(t_int *w)
+{
+    int nblock = (int)(w[1]);
+    t_float *in1 = (t_float *)(w[2]);
+    t_float *in2 = (t_float *)(w[3]);
+    t_float *out = (t_float *)(w[4]);
+    while (nblock--)
+    {
+	float iph = *in1++;
+	float slope = *in2++;
+	float oph = iph * slope;
+	if (oph > .5)
+	{
+	    slope = 1. / (slope + slope);  /* x(y=.5) */
+	    if (slope == 1.)
+		*out++ = 0;  /* CHECKED */
+	    else
+		*out++ = (iph - slope) / (2. - (slope + slope)) + .5;
+	}
+	else *out++ = oph;
+    }
+    return (w + 5);
+}
+
+static void kink_dsp(t_kink *x, t_signal **sp)
+{
+    dsp_add(kink_perform, 4, sp[0]->s_n,
+	    sp[0]->s_vec, sp[1]->s_vec, sp[2]->s_vec);
+}
+
+static void *kink_new(t_symbol *s, int ac, t_atom *av)
+{
+    t_kink *x = (t_kink *)pd_new(kink_class);
+    sic_inlet((t_sic *)x, 1, KINK_DEFSLOPE, 0, ac, av);
+    outlet_new((t_object *)x, &s_signal);
+    return (x);
+}
+
+void kink_tilde_setup(void)
+{
+    kink_class = class_new(gensym("kink~"),
+			   (t_newmethod)kink_new, 0,
+			   sizeof(t_kink), 0, A_GIMME, 0);
+    sic_setup(kink_class, kink_dsp, SIC_FLOATTOSIGNAL);
+}