1 files changed, 48 insertions, 0 deletions
diff --git a/doubledelta/doubledelta.c b/doubledelta/doubledelta.c
new file mode 100644
index 0000000..57323a8
--- /dev/null
+++ b/doubledelta/doubledelta.c
@@ -0,0 +1,48 @@
+#include "m_pd.h"
+
+t_class *doubledelta_class;
+
+typedef struct _doubledelta
+{
+  t_object x_obj;
+  t_float f_now, f_prev, f_delta, f_delta_prev, f_doubledelta, fa;
+  t_outlet *delta, *doubledelta;
+} t_doubledelta;
+
+void doubledelta_float(t_doubledelta *y, t_floatarg f)
+{
+  y->f_delta_prev = y->f_delta;
+  y->f_prev = y->f_now;
+  y->f_now = f;
+  y->f_delta = y->f_now - y->f_prev;
+  y->f_doubledelta = y->f_delta - y->f_delta_prev;
+  outlet_float(y->doubledelta, y->f_doubledelta);
+  outlet_float(y->delta, y->f_delta);
+}
+
+void doubledelta_bang(t_doubledelta *y)
+{
+  outlet_float(y->doubledelta, y->f_doubledelta);
+  outlet_float(y->delta, y->f_delta);
+}
+
+void *doubledelta_new(t_floatarg f)
+{
+  t_doubledelta *y = (t_doubledelta *)pd_new(doubledelta_class);
+  y->fa = f;
+  y->delta = outlet_new(&y->x_obj, gensym("float"));
+  y->doubledelta = outlet_new(&y->x_obj, gensym("float"));
+  return(void *)y;
+}
+
+void doubledelta_setup(void) 
+{
+  doubledelta_class = class_new(gensym("doubledelta"),
+  (t_newmethod)doubledelta_new,
+  0, sizeof(t_doubledelta),
+  0, A_DEFFLOAT, 0);
+  post("delta & delta-delta values, <morph_2016@yahoo.co.uk>");
+  class_sethelpsymbol(doubledelta_class, gensym("help-ddelta"));
+  class_addbang(doubledelta_class, doubledelta_bang);
+  class_addfloat(doubledelta_class, doubledelta_float);
+}