1 files changed, 73 insertions, 0 deletions
diff --git a/cyclone/sickle/linedrive.c b/cyclone/sickle/linedrive.c
new file mode 100644
index 0000000..8b133ab
--- /dev/null
+++ b/cyclone/sickle/linedrive.c
@@ -0,0 +1,73 @@
+/* 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.  */
+
+/* CHECKME polarity */
+
+#include <math.h>
+#include "m_pd.h"
+
+#if defined(NT) || defined(MACOSX)
+#define logf  log
+#define expf  exp
+#endif
+
+static t_class *linedrive_class;
+
+typedef struct _linedrive
+{
+    t_object  x_ob;
+    t_float   x_maxin;
+    t_float   x_maxout;
+    t_float   x_expcoef;
+    t_float   x_lincoef;
+    t_atom    x_vec[2];
+    int       x_linear;
+} t_linedrive;
+
+static void linedrive_float(t_linedrive *x, t_floatarg f)
+{
+    float outval = f - x->x_maxin;
+    if (outval >= 0)
+	outval = x->x_maxout;  /* CHECKED */
+    else if (x->x_linear)
+	outval = x->x_maxout + outval * x->x_lincoef;
+    else
+	outval = expf(outval * x->x_expcoef) * x->x_maxout;
+    SETFLOAT(x->x_vec, outval);
+    outlet_list(((t_object *)x)->ob_outlet, 0, 2, x->x_vec);
+}
+
+static void *linedrive_new(t_floatarg maxin, t_floatarg maxout,
+			   t_floatarg curve, t_floatarg deltime)
+{
+    t_linedrive *x = (t_linedrive *)pd_new(linedrive_class);
+    x->x_maxin = (maxin < 1.0e-20f && maxin > -1e-20f ? 0 : maxin);
+    x->x_maxout = maxout;
+    if (curve < 1.0e-20f) curve = 1.0;  /* a bug in msp? */
+    if (curve == 1.0)
+    {
+	x->x_expcoef = 0;
+	x->x_lincoef = (x->x_maxin == 0 ? 0 : x->x_maxout / x->x_maxin);
+	x->x_linear = 1;
+    }
+    else {
+	x->x_expcoef = logf(curve);
+	x->x_lincoef = 0;
+	x->x_linear = 0;
+    }
+    SETFLOAT(&x->x_vec[1], deltime);  /* CHECKED: any value accepted */
+    floatinlet_new((t_object *)x, &x->x_vec[1].a_w.w_float);
+    outlet_new((t_object *)x, &s_list);
+    return (x);
+}
+
+void linedrive_setup(void)
+{
+    linedrive_class = class_new(gensym("linedrive"),
+				(t_newmethod)linedrive_new, 0,
+				sizeof(t_linedrive), 0,
+				A_DEFFLOAT, A_DEFFLOAT,
+				A_DEFFLOAT, A_DEFFLOAT, 0);
+    class_addfloat(linedrive_class, linedrive_float);
+}