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Diffstat (limited to 'line3/line3.c')
| -rwxr-xr-x | line3/line3.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/line3/line3.c b/line3/line3.c new file mode 100755 index 0000000..2a6e813 --- /dev/null +++ b/line3/line3.c @@ -0,0 +1,178 @@ +// 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; + 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); +} |