From 01dc1fd220d6f17929bb613412dd2f54fe8eb438 Mon Sep 17 00:00:00 2001 From: Hans-Christoph Steiner Date: Thu, 20 Oct 2011 05:00:13 +0000 Subject: made complete library, supporting 'make install' and 'make dist' svn path=/trunk/externals/bbogart/chaos/; revision=15626 --- lotkavolterra.c | 326 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 326 insertions(+) create mode 100644 lotkavolterra.c (limited to 'lotkavolterra.c') diff --git a/lotkavolterra.c b/lotkavolterra.c new file mode 100644 index 0000000..aad45c4 --- /dev/null +++ b/lotkavolterra.c @@ -0,0 +1,326 @@ +/* lotkavolterra Attractor PD External */ +/* Copyright Michael McGonagle, 2003 */ +/* This program is distributed under the params of the GNU Public License */ + +/////////////////////////////////////////////////////////////////////////////////// +/* This file is part of Chaos PD Externals. */ +/* */ +/* Chaos PD Externals are free software; you can redistribute them and/or modify */ +/* them under the terms of the GNU General Public License as published by */ +/* the Free Software Foundation; either version 2 of the License, or */ +/* (at your option) any later version. */ +/* */ +/* Chaos PD Externals are distributed in the hope that they will be useful, */ +/* but WITHOUT ANY WARRANTY; without even the implied warranty of */ +/* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ +/* GNU General Public License for more details. */ +/* */ +/* You should have received a copy of the GNU General Public License */ +/* along with the Chaos PD Externals; if not, write to the Free Software */ +/* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ +/////////////////////////////////////////////////////////////////////////////////// + +#include +#include +#include +#include +#include "chaos.h" + +#define M_a_lo -1000 +#define M_a_hi 1000 +#define M_b_lo -1000 +#define M_b_hi 1000 +#define M_c_lo -1000 +#define M_c_hi 1000 +#define M_e_lo -1000 +#define M_e_hi 1000 + +#define M_a 0 +#define M_b 1 +#define M_c 2 +#define M_e 3 + +#define M_r 0 +#define M_f 1 + +#define M_param_count 4 +#define M_var_count 2 +#define M_search_count 3 +#define M_failure_limit 1000 + +static char *version = "lotkavolterra v0.0, by Michael McGonagle, 2003"; + +t_class *lotkavolterra_class; + +typedef struct lotkavolterra_struct { + t_object x_obj; + + double vars[M_var_count]; + double vars_init[M_var_count]; + t_atom vars_out[M_var_count]; + t_outlet *vars_outlet; + + t_atom search_out[M_search_count]; + t_outlet *search_outlet; + + double a, a_lo, a_hi, b, b_lo, b_hi, c, c_lo, c_hi, e, e_lo, e_hi; + t_atom params_out[M_param_count]; + t_outlet *params_outlet; + double lyap_exp, lyap_lo, lyap_hi, lyap_limit, failure_ratio; + + t_outlet *outlets[M_var_count - 1]; +} lotkavolterra_struct; + +static void calc(lotkavolterra_struct *lotkavolterra, double *vars) { + double r_0, f_0; + r_0 =vars[M_r]+lotkavolterra -> a*vars[M_r]-lotkavolterra -> b*vars[M_r]*vars[M_f]; + f_0 =vars[M_f]+lotkavolterra -> e*lotkavolterra -> b*vars[M_r]*vars[M_f]-lotkavolterra -> c*vars[M_f]; + vars[M_r] = r_0; + vars[M_f] = f_0; +} // end calc + +static void calculate(lotkavolterra_struct *lotkavolterra) { + calc(lotkavolterra, lotkavolterra -> vars); + outlet_float(lotkavolterra -> x_obj.ob_outlet, lotkavolterra -> vars[M_r]); + outlet_float(lotkavolterra -> outlets[M_f - 1], lotkavolterra -> vars[M_f]); +} // end calculate + +static void reset(lotkavolterra_struct *lotkavolterra, t_symbol *s, int argc, t_atom *argv) { + if (argc == M_var_count) { + lotkavolterra -> vars[M_r] = (double) atom_getfloatarg(M_r, argc, argv); + lotkavolterra -> vars[M_f] = (double) atom_getfloatarg(M_f, argc, argv); + } else { + lotkavolterra -> vars[M_r] = lotkavolterra -> vars_init[M_r]; + lotkavolterra -> vars[M_f] = lotkavolterra -> vars_init[M_f]; + } // end if +} // end reset + +static char *classify(lotkavolterra_struct *lotkavolterra) { + static char buff[5]; + char *c = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"; + buff[0] = c[(int) (((lotkavolterra -> a - M_a_lo) * (1.0 / (M_a_hi - M_a_lo))) * 26)]; + buff[1] = c[(int) (((lotkavolterra -> b - M_b_lo) * (1.0 / (M_b_hi - M_b_lo))) * 26)]; + buff[2] = c[(int) (((lotkavolterra -> c - M_c_lo) * (1.0 / (M_c_hi - M_c_lo))) * 26)]; + buff[3] = c[(int) (((lotkavolterra -> e - M_e_lo) * (1.0 / (M_e_hi - M_e_lo))) * 26)]; + buff[4] = '\0'; + return buff; +} + +static void make_results(lotkavolterra_struct *lotkavolterra) { + SETFLOAT(&lotkavolterra -> search_out[0], lotkavolterra -> lyap_exp); + SETSYMBOL(&lotkavolterra -> search_out[1], gensym(classify(lotkavolterra))); + SETFLOAT(&lotkavolterra -> search_out[2], lotkavolterra -> failure_ratio); + SETFLOAT(&lotkavolterra -> vars_out[M_r], lotkavolterra -> vars[M_r]); + SETFLOAT(&lotkavolterra -> vars_out[M_f], lotkavolterra -> vars[M_f]); + SETFLOAT(&lotkavolterra -> params_out[M_a], lotkavolterra -> a); + SETFLOAT(&lotkavolterra -> params_out[M_b], lotkavolterra -> b); + SETFLOAT(&lotkavolterra -> params_out[M_c], lotkavolterra -> c); + SETFLOAT(&lotkavolterra -> params_out[M_e], lotkavolterra -> e); + outlet_list(lotkavolterra -> params_outlet, gensym("list"), M_param_count, lotkavolterra -> params_out); + outlet_list(lotkavolterra -> vars_outlet, gensym("list"), M_var_count, lotkavolterra -> vars_out); +} + +static void show(lotkavolterra_struct *lotkavolterra) { + make_results(lotkavolterra); + outlet_anything(lotkavolterra -> search_outlet, gensym("show"), M_search_count, lotkavolterra -> search_out); +} + +static void param(lotkavolterra_struct *lotkavolterra, t_symbol *s, int argc, t_atom *argv) { + if (argc != 4) { + post("Incorrect number of arguments for lotkavolterra fractal. Expecting 4 arguments."); + return; + } + lotkavolterra -> a = (double) atom_getfloatarg(0, argc, argv); + lotkavolterra -> b = (double) atom_getfloatarg(1, argc, argv); + lotkavolterra -> c = (double) atom_getfloatarg(2, argc, argv); + lotkavolterra -> e = (double) atom_getfloatarg(3, argc, argv); +} + +static void seed(lotkavolterra_struct *lotkavolterra, t_symbol *s, int argc, t_atom *argv) { + if (argc > 0) { + srand48(((unsigned int)time(0))|1); + } else { + srand48((unsigned int) atom_getfloatarg(0, argc, argv)); + } +} + +static void lyap(lotkavolterra_struct *lotkavolterra, t_floatarg l, t_floatarg h, t_floatarg lim) { + lotkavolterra -> lyap_lo = l; + lotkavolterra -> lyap_hi = h; + lotkavolterra -> lyap_limit = (double) ((int) lim); +} + +static void elyap(lotkavolterra_struct *lotkavolterra) { + double results[M_var_count]; + int i; + if (lyapunov_full((void *) lotkavolterra, (t_gotfn) calc, M_var_count, lotkavolterra -> vars, results) != NULL) { + post("elyapunov:"); + for(i = 0; i < M_var_count; i++) { post("%d: %3.80f", i, results[i]); } + } +} + +static void limiter(lotkavolterra_struct *lotkavolterra) { + if (lotkavolterra -> a_lo < M_a_lo) { lotkavolterra -> a_lo = M_a_lo; } + if (lotkavolterra -> a_lo > M_a_hi) { lotkavolterra -> a_lo = M_a_hi; } + if (lotkavolterra -> a_hi < M_a_lo) { lotkavolterra -> a_hi = M_a_lo; } + if (lotkavolterra -> a_hi > M_a_hi) { lotkavolterra -> a_hi = M_a_hi; } + if (lotkavolterra -> b_lo < M_b_lo) { lotkavolterra -> b_lo = M_b_lo; } + if (lotkavolterra -> b_lo > M_b_hi) { lotkavolterra -> b_lo = M_b_hi; } + if (lotkavolterra -> b_hi < M_b_lo) { lotkavolterra -> b_hi = M_b_lo; } + if (lotkavolterra -> b_hi > M_b_hi) { lotkavolterra -> b_hi = M_b_hi; } + if (lotkavolterra -> c_lo < M_c_lo) { lotkavolterra -> c_lo = M_c_lo; } + if (lotkavolterra -> c_lo > M_c_hi) { lotkavolterra -> c_lo = M_c_hi; } + if (lotkavolterra -> c_hi < M_c_lo) { lotkavolterra -> c_hi = M_c_lo; } + if (lotkavolterra -> c_hi > M_c_hi) { lotkavolterra -> c_hi = M_c_hi; } + if (lotkavolterra -> e_lo < M_e_lo) { lotkavolterra -> e_lo = M_e_lo; } + if (lotkavolterra -> e_lo > M_e_hi) { lotkavolterra -> e_lo = M_e_hi; } + if (lotkavolterra -> e_hi < M_e_lo) { lotkavolterra -> e_hi = M_e_lo; } + if (lotkavolterra -> e_hi > M_e_hi) { lotkavolterra -> e_hi = M_e_hi; } +} + +static void constrain(lotkavolterra_struct *lotkavolterra, t_symbol *s, int argc, t_atom *argv) { + int i; + t_atom *arg = argv; + if (argc == 0) { + // reset to full limits of search ranges + lotkavolterra -> a_lo = M_a_lo; + lotkavolterra -> a_hi = M_a_hi; + lotkavolterra -> b_lo = M_b_lo; + lotkavolterra -> b_hi = M_b_hi; + lotkavolterra -> c_lo = M_c_lo; + lotkavolterra -> c_hi = M_c_hi; + lotkavolterra -> e_lo = M_e_lo; + lotkavolterra -> e_hi = M_e_hi; + return; + } + if (argc == 1) { + // set the ranges based on percentage of full range + double percent = atom_getfloat(arg); + double a_spread = ((M_a_hi - M_a_lo) * percent) / 2; + double b_spread = ((M_b_hi - M_b_lo) * percent) / 2; + double c_spread = ((M_c_hi - M_c_lo) * percent) / 2; + double e_spread = ((M_e_hi - M_e_lo) * percent) / 2; + lotkavolterra -> a_lo = lotkavolterra -> a - a_spread; + lotkavolterra -> a_hi = lotkavolterra -> a + a_spread; + lotkavolterra -> b_lo = lotkavolterra -> b - b_spread; + lotkavolterra -> b_hi = lotkavolterra -> b + b_spread; + lotkavolterra -> c_lo = lotkavolterra -> c - c_spread; + lotkavolterra -> c_hi = lotkavolterra -> c + c_spread; + lotkavolterra -> e_lo = lotkavolterra -> e - e_spread; + lotkavolterra -> e_hi = lotkavolterra -> e + e_spread; + limiter(lotkavolterra); + return; + } + if (argc != M_param_count * 2) { + post("Invalid number of arguments for lotkavolterra constraints, requires 8 values, got %d", argc); + return; + } + lotkavolterra -> a_lo = atom_getfloat(arg++); + lotkavolterra -> a_hi = atom_getfloat(arg++); + lotkavolterra -> b_lo = atom_getfloat(arg++); + lotkavolterra -> b_hi = atom_getfloat(arg++); + lotkavolterra -> c_lo = atom_getfloat(arg++); + lotkavolterra -> c_hi = atom_getfloat(arg++); + lotkavolterra -> e_lo = atom_getfloat(arg++); + lotkavolterra -> e_hi = atom_getfloat(arg++); + limiter(lotkavolterra); +} + +static void search(lotkavolterra_struct *lotkavolterra, t_symbol *s, int argc, t_atom *argv) { + int not_found, not_expired = lotkavolterra -> lyap_limit; + int jump, i, iterations; + t_atom vars[M_var_count]; + double temp_a = lotkavolterra -> a; + double temp_b = lotkavolterra -> b; + double temp_c = lotkavolterra -> c; + double temp_e = lotkavolterra -> e; + if (argc > 0) { + for (i = 0; i < M_var_count; i++) { + SETFLOAT(&vars[i], atom_getfloatarg(i, argc, argv)); + } + } else { + for (i = 0; i < M_var_count; i++) { + SETFLOAT(&vars[i], lotkavolterra -> vars_init[i]); + } + } + do { + jump = 500; + not_found = 0; + iterations = 10000; + bad_params: + lotkavolterra -> a = (drand48() * (lotkavolterra -> a_hi - lotkavolterra -> a_lo)) + lotkavolterra -> a_lo; + lotkavolterra -> b = (drand48() * (lotkavolterra -> b_hi - lotkavolterra -> b_lo)) + lotkavolterra -> b_lo; + lotkavolterra -> c = (drand48() * (lotkavolterra -> c_hi - lotkavolterra -> c_lo)) + lotkavolterra -> c_lo; + lotkavolterra -> e = (drand48() * (lotkavolterra -> e_hi - lotkavolterra -> e_lo)) + lotkavolterra -> e_lo; + // put any preliminary checks specific to this fractal to eliminate bad_params + + reset(lotkavolterra, NULL, argc, vars); + do { calc(lotkavolterra, lotkavolterra -> vars); } while(jump--); + lotkavolterra -> lyap_exp = lyapunov((void *) lotkavolterra, (t_gotfn) calc, M_var_count, (double *) lotkavolterra -> vars); + if (isnan(lotkavolterra -> lyap_exp)) { not_found = 1; } + if (lotkavolterra -> lyap_exp < lotkavolterra -> lyap_lo || lotkavolterra -> lyap_exp > lotkavolterra -> lyap_hi) { not_found = 1; } + not_expired--; + } while(not_found && not_expired); + reset(lotkavolterra, NULL, argc, vars); + if (!not_expired) { + post("Could not find a fractal after %d attempts.", (int) lotkavolterra -> lyap_limit); + post("Try using wider constraints."); + lotkavolterra -> a = temp_a; + lotkavolterra -> b = temp_b; + lotkavolterra -> c = temp_c; + lotkavolterra -> e = temp_e; + outlet_anything(lotkavolterra -> search_outlet, gensym("invalid"), 0, NULL); + } else { + lotkavolterra -> failure_ratio = (lotkavolterra -> lyap_limit - not_expired) / lotkavolterra -> lyap_limit; + make_results(lotkavolterra); + outlet_anything(lotkavolterra -> search_outlet, gensym("search"), M_search_count, lotkavolterra -> search_out); + } +} + +void *lotkavolterra_new(t_symbol *s, int argc, t_atom *argv) { + lotkavolterra_struct *lotkavolterra = (lotkavolterra_struct *) pd_new(lotkavolterra_class); + if (lotkavolterra != NULL) { + outlet_new(&lotkavolterra -> x_obj, &s_float); + lotkavolterra -> outlets[0] = outlet_new(&lotkavolterra -> x_obj, &s_float); + lotkavolterra -> search_outlet = outlet_new(&lotkavolterra -> x_obj, &s_list); + lotkavolterra -> vars_outlet = outlet_new(&lotkavolterra -> x_obj, &s_list); + lotkavolterra -> params_outlet = outlet_new(&lotkavolterra -> x_obj, &s_list); + if (argc == M_param_count + M_var_count) { + lotkavolterra -> vars_init[M_r] = lotkavolterra -> vars[M_r] = (double) atom_getfloatarg(0, argc, argv); + lotkavolterra -> vars_init[M_f] = lotkavolterra -> vars[M_f] = (double) atom_getfloatarg(1, argc, argv); + lotkavolterra -> a = (double) atom_getfloatarg(2, argc, argv); + lotkavolterra -> b = (double) atom_getfloatarg(3, argc, argv); + lotkavolterra -> c = (double) atom_getfloatarg(4, argc, argv); + lotkavolterra -> e = (double) atom_getfloatarg(5, argc, argv); + } else { + if (argc != 0 && argc != M_param_count + M_var_count) { + post("Incorrect number of arguments for lotkavolterra fractal. Expecting 6 arguments."); + } + lotkavolterra -> vars_init[M_r] = 0.1; + lotkavolterra -> vars_init[M_f] = 0.1; + lotkavolterra -> a = 0.04; + lotkavolterra -> b = 0.0005; + lotkavolterra -> c = 0.2; + lotkavolterra -> e = 0.1; + } + constrain(lotkavolterra, NULL, 0, NULL); + lyap(lotkavolterra, -1000000.0, 1000000.0, M_failure_limit); + } + return (void *)lotkavolterra; +} + +void lotkavolterra_setup(void) { + lotkavolterra_class = class_new(gensym("lotkavolterra"), (t_newmethod) lotkavolterra_new, 0, sizeof(lotkavolterra_struct), 0, A_GIMME, 0); + class_addbang(lotkavolterra_class, (t_method) calculate); + class_addmethod(lotkavolterra_class, (t_method) reset, gensym("reset"), A_GIMME, 0); + class_addmethod(lotkavolterra_class, (t_method) show, gensym("show"), 0); + class_addmethod(lotkavolterra_class, (t_method) param, gensym("param"), A_GIMME, 0); + class_addmethod(lotkavolterra_class, (t_method) seed, gensym("seed"), A_GIMME, 0); + class_addmethod(lotkavolterra_class, (t_method) lyap, gensym("lyapunov"), A_DEFFLOAT, A_DEFFLOAT, A_DEFFLOAT, 0); + class_addmethod(lotkavolterra_class, (t_method) elyap, gensym("elyapunov"), 0); + class_addmethod(lotkavolterra_class, (t_method) search, gensym("search"), A_GIMME, 0); + class_addmethod(lotkavolterra_class, (t_method) constrain, gensym("constrain"), A_GIMME, 0); + + +} + -- cgit v1.2.1