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-rw-r--r--line3/line3.c177
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diff --git a/line3/line3.c b/line3/line3.c
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--- a/line3/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);
-}
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