This commit was generated by cvs2svn to compensate for changes in r4096,

which included commits to RCS files with non-trunk default branches.

svn path=/trunk/; revision=4097

1 files changed, 80 insertions, 0 deletions

diff --git a/externals/build/src/steady.c b/externals/build/src/steady.c
new file mode 100644
index 00000000..c79ac4ef
--- /dev/null
+++ b/externals/build/src/steady.c
@@ -0,0 +1,80 @@
+#include "m_pd.h"
+#include <math.h>
+
+typedef struct _steady
+{
+  t_object x_obj;
+  t_float f_min;
+  t_float f_max;
+  t_float f_prev;
+  t_int resetflag;
+  t_float f_in, f_maxjump;
+  t_outlet *max, *min, *smooth;
+} t_steady;
+
+t_class *steady_class;
+
+void steady_float (t_steady *x, t_floatarg fin)
+{
+  if (x->resetflag == 0)
+    {
+      x->f_max = fin > x->f_max ? fin : x->f_max;
+      x->f_min = fin < x->f_min ? fin : x->f_min;
+      outlet_float(x->smooth, fin);
+      outlet_float(x->min, x->f_min);
+      outlet_float(x->max, x->f_max);
+      x->f_prev = fin;
+      x->resetflag=1;
+    }
+  else
+    {
+      float min = fin >= x->f_prev ? x->f_prev : fin;
+      float max = fin <= x->f_prev ? x->f_prev : fin;
+      fin = (max - min) > x->f_maxjump ? x->f_prev : fin;
+      x->f_max = fin > x->f_max ? fin : x->f_max;
+      x->f_min = fin < x->f_min ? fin : x->f_min;
+      float sm_fin = fabs(fin - x->f_prev) > x->f_maxjump ? x->f_prev : fin;
+      outlet_float(x->smooth, sm_fin);
+      outlet_float(x->min, x->f_min);
+      outlet_float(x->max, x->f_max);
+      x->f_prev = fin;
+    }
+}
+
+void steady_bang (t_steady *x)
+{
+  outlet_float(x->min, x->f_min);
+  outlet_float(x->max, x->f_max);
+  x->f_min = 1e08;
+  x->f_max = -1e08;
+  x->resetflag=0;
+}
+
+void *steady_new(t_floatarg f) 
+{
+  t_steady *x = (t_steady *)pd_new(steady_class);
+  x->f_min = 1e08;
+  x->f_max = -1e08;
+  x->f_maxjump = f;
+  x->resetflag = 0;
+  x->f_prev = 0;
+  floatinlet_new(&x->x_obj, &x->f_maxjump);
+  x->max = outlet_new(&x->x_obj, gensym("float"));
+  x->min = outlet_new(&x->x_obj, gensym("float"));
+  x->smooth = outlet_new(&x->x_obj, gensym("float"));
+  return (void *)x;
+}
+
+void steady_setup(void) {
+  steady_class = class_new(gensym("steady"),
+  (t_newmethod)steady_new,
+  0, sizeof(t_steady),
+  0, A_DEFFLOAT, 0);
+  post("|+++++++++++++++++>steady<------------------|");
+  post("|+>max, min and through must not jump more<-|");
+  post("|+++++++++>than a specified amount<---------|");
+  post("|+++>edward<------->kelly<++++++++>2005<----|");
+  class_sethelpsymbol(steady_class, gensym("help-steady"));
+  class_addbang(steady_class, steady_bang);
+  class_addfloat(steady_class, steady_float);
+}