1 files changed, 95 insertions, 0 deletions
diff --git a/cyclone/sickle/triangle.c b/cyclone/sickle/triangle.c
new file mode 100644
index 0000000..703e5ba
--- /dev/null
+++ b/cyclone/sickle/triangle.c
@@ -0,0 +1,95 @@
+/* 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 */
+}