1 files changed, 121 insertions, 0 deletions
diff --git a/externals/vanilla/line.c b/externals/vanilla/line.c
new file mode 100644
index 00000000..f559b67e
--- /dev/null
+++ b/externals/vanilla/line.c
@@ -0,0 +1,121 @@
+/* Copyright (c) 1997-1999 Miller Puckette.
+* For information on usage and redistribution, and for a DISCLAIMER OF ALL
+* WARRANTIES, see the file, "LICENSE.txt," in this distribution.  */
+
+/* clock objects */
+
+#include "m_pd.h"
+#include <stdio.h>
+
+static t_class *line_class;
+
+typedef struct _line
+{
+    t_object x_obj;
+    t_clock *x_clock;
+    double x_targettime;
+    t_float x_targetval;
+    double x_prevtime;
+    t_float x_setval;
+    int x_gotinlet;
+    t_float x_grain;
+    double x_1overtimediff;
+    double x_in1val;
+} t_line;
+
+static void line_tick(t_line *x)
+{
+    double timenow = clock_getsystime();
+    double msectogo = - clock_gettimesince(x->x_targettime);
+    if (msectogo < 1E-9)
+    {
+        outlet_float(x->x_obj.ob_outlet, x->x_targetval);
+    }
+    else
+    {
+        outlet_float(x->x_obj.ob_outlet,
+            x->x_setval + x->x_1overtimediff * (timenow - x->x_prevtime)
+                * (x->x_targetval - x->x_setval));
+        clock_delay(x->x_clock,
+            (x->x_grain > msectogo ? msectogo : x->x_grain));
+    }
+}
+
+static void line_float(t_line *x, t_float f)
+{
+    double timenow = clock_getsystime();
+    if (x->x_gotinlet && x->x_in1val > 0)
+    {
+        if (timenow > x->x_targettime) x->x_setval = x->x_targetval;
+        else x->x_setval = x->x_setval + x->x_1overtimediff *
+            (timenow - x->x_prevtime)
+            * (x->x_targetval - x->x_setval);
+        x->x_prevtime = timenow;
+        x->x_targettime = clock_getsystimeafter(x->x_in1val);
+        x->x_targetval = f;
+        line_tick(x);
+        x->x_gotinlet = 0;
+        x->x_1overtimediff = 1./ (x->x_targettime - timenow);
+        clock_delay(x->x_clock,
+            (x->x_grain > x->x_in1val ? x->x_in1val : x->x_grain));
+    
+    }
+    else
+    {
+        clock_unset(x->x_clock);
+        x->x_targetval = x->x_setval = f;
+        outlet_float(x->x_obj.ob_outlet, f);
+    }
+    x->x_gotinlet = 0;
+}
+
+static void line_ft1(t_line *x, t_floatarg g)
+{
+    x->x_in1val = g;
+    x->x_gotinlet = 1;
+}
+
+static void line_stop(t_line *x)
+{
+    x->x_targetval = x->x_setval;
+    clock_unset(x->x_clock);
+}
+
+static void line_set(t_line *x, t_floatarg f)
+{
+    clock_unset(x->x_clock);
+    x->x_targetval = x->x_setval = f;
+}
+
+static void line_free(t_line *x)
+{
+    clock_free(x->x_clock);
+}
+
+static void *line_new(t_floatarg f, t_floatarg grain)
+{
+    t_line *x = (t_line *)pd_new(line_class);
+    x->x_targetval = x->x_setval = f;
+    x->x_gotinlet = 0;
+    x->x_1overtimediff = 1;
+    x->x_clock = clock_new(x, (t_method)line_tick);
+    x->x_targettime = x->x_prevtime = clock_getsystime();
+    if (grain <= 0) grain = 20;
+    x->x_grain = grain;
+    outlet_new(&x->x_obj, gensym("float"));
+    inlet_new(&x->x_obj, &x->x_obj.ob_pd, gensym("float"), gensym("ft1"));
+    return (x);
+}
+
+static void line_setup(void)
+{
+    line_class = class_new(gensym("line"), (t_newmethod)line_new,
+        (t_method)line_free, sizeof(t_line), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
+    class_addmethod(line_class, (t_method)line_ft1,
+        gensym("ft1"), A_FLOAT, 0);
+    class_addmethod(line_class, (t_method)line_stop,
+        gensym("stop"), 0);
+    class_addmethod(line_class, (t_method)line_set,
+        gensym("set"), A_FLOAT, 0);
+    class_addfloat(line_class, (t_method)line_float);
+}