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authorCyrille Henry <nusmuk@users.sourceforge.net>2010-11-10 16:29:05 +0000
committerCyrille Henry <nusmuk@users.sourceforge.net>2010-11-10 16:29:05 +0000
commitb06e377d1aba31ff8ef27732335a7ccd6610b387 (patch)
tree90507969582e24f01039dd99dbe5419ff687aef7 /nusmuk-utils/line3.c
parent65f8dbf20dcc77f1a6e12271345d1806516fdfa2 (diff)
svn path=/trunk/externals/nusmuk/; revision=14370
Diffstat (limited to 'nusmuk-utils/line3.c')
-rw-r--r--nusmuk-utils/line3.c177
1 files changed, 177 insertions, 0 deletions
diff --git a/nusmuk-utils/line3.c b/nusmuk-utils/line3.c
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+++ b/nusmuk-utils/line3.c
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+// line3
+// based on miller puckette line object (so licence / copyright comes from pure data)
+// compatible with line, but with a 3d order polynome.
+// there is continuity of the variation speed
+
+/*
+This software is copyrighted by Miller Puckette and others. The following
+terms (the "Standard Improved BSD License") apply to all files associated with
+the software unless explicitly disclaimed in individual files:
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are
+met:
+
+1. Redistributions of source code must retain the above copyright
+ notice, this list of conditions and the following disclaimer.
+2. Redistributions in binary form must reproduce the above
+ copyright notice, this list of conditions and the following
+ disclaimer in the documentation and/or other materials provided
+ with the distribution.
+3. The name of the author may not be used to endorse or promote
+ products derived from this software without specific prior
+ written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
+EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR
+BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
+TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
+IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
+THE POSSIBILITY OF SUCH DAMAGE.
+*/
+
+// Cyrille Henry 01 2005
+
+
+#include "m_pd.h"
+
+static t_class *line3_class;
+
+typedef struct _line3
+{
+ t_object x_obj;
+ t_clock *x_clock;
+ double x_targettime;
+ t_float x_targetval,setderiv, a, b;
+ double x_prevtime;
+ t_float x_setval;
+ int x_gotinlet;
+ t_float x_grain;
+ double x_1overtimediff;
+ double x_in1val;
+} t_line3;
+
+void line3_tick(t_line3 *x)
+{
+ double tmp, t;
+ 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
+ {
+ t = (timenow - x->x_prevtime);
+
+ tmp = x->a * t * t * t + x->b * t * t + x->setderiv * t + x->x_setval;
+
+ outlet_float(x->x_obj.ob_outlet, tmp);
+ clock_delay(x->x_clock, (x->x_grain > msectogo ? msectogo : x->x_grain));
+ }
+}
+
+void line3_float(t_line3 *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;
+ x->setderiv = 0;
+ }
+ else
+ {
+ x->x_setval = x->a * (timenow - x->x_prevtime) * (timenow - x->x_prevtime) * (timenow - x->x_prevtime) + x->b * (timenow - x->x_prevtime) * (timenow - x->x_prevtime) + x->setderiv * (timenow - x->x_prevtime) + x->x_setval;
+
+ x->setderiv = 3 * x->a * (timenow - x->x_prevtime) * (timenow - x->x_prevtime) + 2 * x->b * (timenow - x->x_prevtime) + x->setderiv;
+
+ }
+ x->x_prevtime = timenow;
+ x->x_targettime = clock_getsystimeafter(x->x_in1val);
+ x->x_targetval = f;
+ x->x_1overtimediff = 1./ (x->x_targettime - timenow);
+
+ x->a = -2 * (x->x_targetval - x->x_setval) * x->x_1overtimediff;
+ x->a += x->setderiv;
+ x->a *= x->x_1overtimediff;
+ x->a *= x->x_1overtimediff;
+
+ x->b = 3 * (x->x_targetval - x->x_setval) * x->x_1overtimediff;
+ x->b -= 2 * x->setderiv;
+ x->b *= x->x_1overtimediff;
+
+ line3_tick(x);
+ x->x_gotinlet = 0;
+
+ 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;
+ x->x_targettime = timenow;
+ outlet_float(x->x_obj.ob_outlet, f);
+ }
+ x->x_gotinlet = 0;
+}
+
+void line3_ft1(t_line3 *x, t_floatarg g)
+{
+ x->x_in1val = g;
+ x->x_gotinlet = 1;
+}
+
+void line3_stop(t_line3 *x)
+{
+ x->x_targetval = x->x_setval;
+ clock_unset(x->x_clock);
+}
+
+void line3_set(t_line3 *x, t_floatarg f)
+{
+ clock_unset(x->x_clock);
+ x->x_targetval = x->x_setval = f;
+ x->setderiv = 0;
+}
+
+void line3_free(t_line3 *x)
+{
+ clock_free(x->x_clock);
+}
+
+void *line3_new(t_floatarg f, t_floatarg grain)
+{
+ t_line3 *x = (t_line3 *)pd_new(line3_class);
+ x->x_targetval = x->x_setval = f;
+ x->x_gotinlet = 0;
+ x->setderiv = 0;
+ x->x_1overtimediff = 1;
+ x->x_clock = clock_new(x, (t_method)line3_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);
+}
+
+void line3_setup(void)
+{
+ line3_class = class_new(gensym("line3"), (t_newmethod)line3_new,
+ (t_method)line3_free, sizeof(t_line3), 0, A_DEFFLOAT, A_DEFFLOAT, 0);
+ class_addmethod(line3_class, (t_method)line3_ft1,
+ gensym("ft1"), A_FLOAT, 0);
+ class_addmethod(line3_class, (t_method)line3_stop,
+ gensym("stop"), 0);
+ class_addmethod(line3_class, (t_method)line3_set,
+ gensym("set"), A_FLOAT, 0);
+ class_addfloat(line3_class, (t_method)line3_float);
+}