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/*
Copyright (C) 2002 Antoine Rousseau
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
This library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with this library; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "m_pd.h"
#include "math.h"
/* ---------- tabreadl: control, linear interpolating ------------------------ */
static t_class *tabreadl_class;
typedef struct _tabreadl
{
t_object x_obj;
t_symbol *x_arrayname;
} t_tabreadl;
static void tabreadl_float(t_tabreadl *x, t_float f)
{
t_garray *a;
int npoints;
t_float *vec;
if (!(a = (t_garray *)pd_findbyclass(x->x_arrayname, garray_class)))
error("%s: no such array", x->x_arrayname->s_name);
else if (!garray_getfloatarray(a, &npoints, &vec))
error("%s: bad template for tabreadl", x->x_arrayname->s_name);
else
{
int n ;
float r,v;
if (f < 0) f = 0;
else if (f >= npoints) f = npoints - 1;
n=f;
if(npoints>1){
r=f-n;
v=vec[n]*(1-r)+vec[n+1]*r;
outlet_float(x->x_obj.ob_outlet, v );
}
else
outlet_float(x->x_obj.ob_outlet, (npoints ? vec[n] : 0));
}
}
static void tabreadl_set(t_tabreadl *x, t_symbol *s)
{
x->x_arrayname = s;
}
static void *tabreadl_new(t_symbol *s)
{
t_tabreadl *x = (t_tabreadl *)pd_new(tabreadl_class);
x->x_arrayname = s;
outlet_new(&x->x_obj, &s_float);
return (x);
}
void tabreadl_setup(void)
{
tabreadl_class = class_new(gensym("tabreadl"), (t_newmethod)tabreadl_new,
0, sizeof(t_tabreadl), 0, A_DEFSYM, 0);
class_addfloat(tabreadl_class, (t_method)tabreadl_float);
class_addmethod(tabreadl_class, (t_method)tabreadl_set, gensym("set"),
A_SYMBOL, 0);
}
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