#include <gsl/gsl_errno.h>
#include <gsl/gsl_multimin.h>
-#define BEST_F "best"
-#define INITIAL_F "initial"
+static const char *input_file, *output_file;
+static char *output_file_tmp;
static double edgewise_vertex_displacement_cost(const Vertices vertices);
static double noncircular_rim_cost(const Vertices vertices);
static void compute_vertex_areas(const Vertices vertices, double areas[N]);
static double best_energy= DBL_MAX;
-static void flushoutput(void);
-static void diee(const char *what) { perror(what); exit(16); }
-static void cost(double *energy, double tweight, double tcost);
-#define COST(weight, compute) cost(&energy, (weight), (compute))
+static void addcost(double *energy, double tweight, double tcost);
+#define COST(weight, compute) addcost(&energy, (weight), (compute))
/*---------- main energy computation and subroutines ----------*/
energy= 0;
printf("cost > energy |");
- COST(1000.0, edgewise_vertex_displacement_cost(vertices));
- COST(1.0, graph_layout_cost(vertices,vertex_areas));
- COST(1e3, noncircular_rim_cost(vertices));
+ COST(1e4, edgewise_vertex_displacement_cost(vertices));
+ COST(1e2, graph_layout_cost(vertices,vertex_areas));
+ COST(1e4, noncircular_rim_cost(vertices));
printf("| total %# e |", energy);
if (energy < best_energy) {
printf(" BEST");
- best_f= fopen(BEST_F ".new","wb"); if (!best_f) diee("fopen new best");
- r= fwrite(vertices,sizeof(vertices),1,best_f); if (r!=1) diee("fwrite");
+ best_f= fopen(output_file_tmp,"wb"); if (!best_f) diee("fopen new out");
+ r= fwrite(vertices,sizeof(Vertices),1,best_f); if (r!=1) diee("fwrite");
if (fclose(best_f)) diee("fclose new best");
- if (rename(BEST_F ".new", BEST_F)) diee("rename install new best");
+ if (rename(output_file_tmp,output_file)) diee("rename install new best");
+
+ best_energy= energy;
}
putchar('\n');
flushoutput();
return energy;
}
-static void cost(double *energy, double tweight, double tcost) {
+static void addcost(double *energy, double tweight, double tcost) {
double tenergy= tweight * tcost;
printf(" %# e > %# e |", tcost, tenergy);
*energy += tenergy;
}
-static void flushoutput(void) {
- if (fflush(stdout) || ferror(stdout)) diee("stdout");
-}
-
static void compute_vertex_areas(const Vertices vertices, double areas[N]) {
int v0,v1,v2, e1,e2, k;
* coordinates. Hopefully this won't be too slow ...
*/
-static void gsldie(const char *what, int status) {
- fprintf(stderr,"gsl function failed: %s: %s\n", what, gsl_strerror(status));
- exit(-1);
-}
-
static gsl_multimin_fminimizer *minimiser;
static const double stop_epsilon= 1e-4;
-#define DIM (N*D3)
-
static double minfunc_f(const gsl_vector *x, void *params) {
assert(x->size == DIM);
assert(x->stride == 1);
Vertices initial, step_size;
FILE *initial_f;
gsl_vector initial_gsl, step_size_gsl;
- int r, v, vx,vy, k;
+ int r, v, k;
- if (argc>1) { fputs("takes no arguments\n",stderr); exit(8); }
+ if (argc!=3 || argv[1][0]=='-' || strncmp(argv[2],"-o",2))
+ { fputs("usage: minimise <input> -o<output\n",stderr); exit(8); }
+
+ input_file= argv[1];
+ output_file= argv[2]+2;
+ if (asprintf(&output_file_tmp,"%s.new",output_file) <= 0) diee("asprintf");
minimiser= gsl_multimin_fminimizer_alloc
(gsl_multimin_fminimizer_nmsimplex, DIM);
multimin_function.n= DIM;
multimin_function.params= 0;
- initial_f= fopen(INITIAL_F,"rb"); if (!initial_f) diee("fopen initial");
+ initial_f= fopen(input_file,"rb"); if (!initial_f) diee("fopen initial");
errno= 0; r= fread(initial,sizeof(initial),1,initial_f);
if (r!=1) diee("fread");
fclose(initial_f);
initial_gsl.owner= 0;
step_size_gsl= initial_gsl;
- initial_gsl.data= (double*)initial;
- step_size_gsl.data= (double*)step_size;
+ initial_gsl.data= &initial[0][0];
+ step_size_gsl.data= &step_size[0][0];
FOR_VERTEX(v)
- K step_size[v][k]= 1e-3;
- FOR_RIM_VERTEX(vx,vy,v)
- step_size[v][3] *= 0.1;
+ K step_size[v][k]= 0.03;
+//int vx,vy;
+// FOR_RIM_VERTEX(vx,vy,v)
+// step_size[v][3] *= 0.1;
- r= gsl_multimin_fminimizer_set(minimiser, &multimin_function,
- &initial_gsl, &step_size_gsl);
- if (r) { gsldie("fminimizer_set",r); }
+ GA( gsl_multimin_fminimizer_set(minimiser, &multimin_function,
+ &initial_gsl, &step_size_gsl) );
for (;;) {
- r= gsl_multimin_fminimizer_iterate(minimiser);
- if (r) { gsldie("fminimizer_iterate",r); }
+ GA( gsl_multimin_fminimizer_iterate(minimiser) );
size= gsl_multimin_fminimizer_size(minimiser);
r= gsl_multimin_test_size(size, stop_epsilon);
- printf("size %# e, r=%d\n", size, r);
+ printf("%*s size %# e, r=%d\n", 135,"", size, r);
flushoutput();
if (r==GSL_SUCCESS) break;
FOR_EDGE(pi,e,qi) {
ri= EDGE_END2(pi,(e+1)%V6); if (ri<0) continue;
si= EDGE_END2(pi,(e+5)%V6); if (si<0) continue;
- assert(ri == EDGE_END2(qi,(e+2)%V6));
- assert(si == EDGE_END2(qi,(e+4)%V6));
K m[k]= (vertices[pi][k] + vertices[qi][k]) * 0.5;
K mprime[k]= (vertices[ri][k] + vertices[si][k]) * 0.5;