1 files changed, 132 insertions, 0 deletions
diff --git a/tripleLine.c b/tripleLine.c
new file mode 100644
index 0000000..bc8530d
--- /dev/null
+++ b/tripleLine.c
@@ -0,0 +1,132 @@
+/*
+ * Copyright (c) 1997-1999 Mark Danks.
+ * For information on usage and redistribution, and for a DISCLAIMER OF ALL
+ * WARRANTIES, see the file, "GEM.LICENSE.TERMS" in this distribution.
+ */
+
+#include "m_pd.h"
+
+/* -------------------------- tripleLine ------------------------------ */
+
+/* instance structure */
+
+static t_class *tripleLine_class;
+
+typedef struct _tripleLine
+{
+	t_object    x_obj;			/* obligatory object header */
+	t_clock		*clock;
+	float		grain;
+	float		destTime;
+	float		curTime;
+	float		curVal[3];
+	float		destVal[3];
+	float		stepVal[3];
+	t_outlet    *t_out1;	    /* the outlet */
+} t_tripleLine;
+
+static void tripleTick(t_tripleLine *x)
+{
+	t_atom argv[3];
+	int i;
+	x->curTime += x->grain;
+	if (x->curTime >= x->destTime)
+	{
+		for (i = 0; i < 3; i++)
+		{
+			x->curVal[i] = x->destVal[i];
+			SETFLOAT((&argv[i]), x->curVal[i]);
+		}
+	}
+	else
+	{
+		for (i = 0; i < 3; i++)
+		{
+			x->curVal[i] += x->stepVal[i];
+			SETFLOAT((&argv[i]), x->curVal[i]);
+		}
+	   	clock_delay(x->clock, x->grain);
+	}
+
+	outlet_list(x->t_out1, &s_list, 3, argv);
+}
+
+static void setLineParameters(t_tripleLine *x, t_symbol *s, int argc, t_atom *argv)
+{
+    float numCounts;
+	int i;
+    t_atom newargv[3];
+	float time = x->destTime;
+	
+	clock_unset(x->clock);
+	
+	if (argc == 4) time = atom_getfloat(&argv[3]);
+	else if (argc != 3)
+	{
+		error("tripleLine: requires 3 or 4 args");
+		return;
+	}
+
+	x->destTime = time;
+	numCounts = time / x->grain;
+	if (x->destTime <= 0.)
+	{
+		x->curTime = 0;
+		for (i = 0; i < 3; i++)
+		{
+			x->curVal[i] = x->destVal[i] = atom_getfloat(&argv[i]);
+			SETFLOAT((&newargv[i]), x->curVal[i]);
+		}
+		outlet_list(x->t_out1, &s_list, 3, newargv);
+		return;
+	}
+	else
+	{
+		for (i = 0; i < 3; i++)
+		{
+			x->destVal[i] = atom_getfloat(&argv[i]);
+			x->stepVal[i] = (x->destVal[i] - x->curVal[i]) / numCounts;
+			SETFLOAT((&newargv[i]), x->curVal[i]);
+		}
+	}
+	x->curTime = 0;
+
+   	clock_delay(x->clock, x->grain);
+	outlet_list(x->t_out1, &s_list, 3, newargv);
+}
+
+static void tripleLine_free(t_tripleLine *x)
+{
+    clock_free(x->clock);
+}
+
+static void *tripleLine_new(t_floatarg time, t_floatarg grain) /* init vals in struc */
+{
+	int i;
+    t_tripleLine *x = (t_tripleLine *)pd_new(tripleLine_class);
+	x->curTime = 0;
+	x->destTime = time;
+    x->clock = clock_new(x, (t_method)tripleTick);
+	for (i = 0; i < 3; i++)
+	{
+		x->curVal[i] = x->destVal[i] = x->stepVal[i] = 0.;
+	}
+	if (grain <= 0) grain = 50;
+	x->grain = (float)grain;
+
+    x->t_out1 = outlet_new(&x->x_obj, 0);
+    return(x);
+}
+
+void tripleLine_setup(void)
+{
+    tripleLine_class = class_new(gensym("tripleLine"), (t_newmethod)tripleLine_new,
+			(t_method)tripleLine_free, sizeof(t_tripleLine), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
+
+    class_addmethod(tripleLine_class, (t_method)setLineParameters,
+    	    &s_list, A_GIMME, A_NULL); 
+
+	 class_sethelpsymbol(tripleLine_class, gensym("help-tripleLine"));
+}
+
+