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#include "cp_head.h"
FILE *fp;
int jason_howard_code(char *datastr)
{
int count=0,nodecount,num,i;
int j,n;
int lpcnt=0;
int f1=3; /* number of flips */
int k;
int v1; /* first random vertice */
int v2; /* neighbor of v1 */
complex W[7]; /* matrix for side pairing maps */
complex C[1000]; /* max number of flips is 1000 */
complex w,wcheck; /* period ratio */
complex tau;
complex r1,r12,r2,r22,r3,r32;
double bnd;
struct p_data *p=&(packdata[current_p]);
complex m_one;
Mobius mob;
// sprintf(msgbuf,"Hello\n");
//msg();
if (sscanf(datastr,"%d",&f1)!= 1 || f1<0
|| p->num_bdry_comp>0 || p->genus!=1)
return 0;
sprintf(msgbuf,"Hello %d \n", f1);
msg();
/* read data in. Want w1,w2 ... = cdiv(mob.a, mob.b) for each
edge-pair[i].mob consider putting in array W and do for loop on
i.(this will change r1 etc)*/
nodecount=p->nodecount;
m_one.re=-1.0;m_one.im=0.0;
k=0;
do
{
for(n=0;n<1;n++){
/* since arrays start at 0 in C right? */
j=1;
while(p->edge_pair[j].edge)
{
mob=p->edge_pair[j].mob;
W[j]=cdiv(mob.b,mob.a);
j++;
}
if (mob.a.re!=0 && mob.a.im!=0) {
/*----------Calculate ratios and select candidate in upper half plane ------*/
r1=cdiv(W[1],W[2]);
r12=cdiv(W[2],W[1]);
r2=cdiv(W[3],W[2]);
r22=cdiv(W[2],W[3]);
r3=cdiv(W[3],W[4]);
r32=cdiv(W[4],W[3]);
/*get initial tau in upper half plane*/
if (r1.im>=0)
w=r1;
else if (r12.im>=0)
w=r12;
else if (r2.im>=0)
w=r2;
else if (r22.im>=0)
w=r22;
else if (r3.im>=0)
w=r3;
else if (r32.im>=0)
w=r32;
else
return 0;
/* lower bnd for imag part in fundemental cell*/
if (w.re>=1)
{
w.re -= floor(w.re);
}
else if (w.re<-1){
w.re = w.re - floor(w.re);
}
bnd=sqrt(1-(w.re)*(w.re));
lpcnt=0;
while (fabs(w.re)>.5 || w.im<bnd)
{
wcheck.re=w.re;
wcheck.im=w.im;
if (w.re>=1)
{
w.re -= floor(w.re);
}
else if (w.re<-1){
w.re = w.re - floor(w.re);
}
else if (w.re<=1 && w.re>.5){
w.re -= 1.0;
}
else if (w.re>=-1 && w.re<-.5){
w.re += 1.0;
}
if (w.im<bnd) {
w=cdiv(m_one,w);
}
if (w.re>=1)
{
w.re -= floor(w.re);
}
else if (w.re<-1){
w.re = w.re - floor(w.re);
}
bnd=sqrt(1-(w.re)*(w.re));
lpcnt=lpcnt+1;
if (lpcnt>5000){
sprintf(msgbuf,"**ERROR**Caught in infinte loop ");
msg();
sprintf(msgbuf,"Flip # %d of %d",count,f1);
msg();
return 0;
}
// need to add more conditions HERE to wcheck
//if (w.re == wcheck.re && w.im == wcheck.im){
// sprintf(msgbuf,"error:caught in infinte loop ");
// msg();
// return 0;
// }
}
tau=w;
sprintf(msgbuf,"tau=%lf + %lf i",tau.re,tau.im);
msg();
// C[count]=tau;
//count++;
if (count<f1)
{
v1=rand()%nodecount;
v1=v1+1;
// sprintf(msgbuf,"v1=%d",v1);
//msg();
num=p->packK_ptr[v1].num;
// v2=rand()%(num-1);
v2=p->packK_ptr[v1].flower[rand()%(num)];
//sprintf(msgbuf,"v2=%d",v2);
// msg();
sprintf(buf,"flip %d %d",v1,v2);
handle_cmd(buf,¤t_p);
sprintf(buf,"repack 2000");
handle_cmd(buf,¤t_p);
sprintf(buf,"fix");
handle_cmd(buf,¤t_p);
//sprintf(buf,"disp -w -C -Rn a");
//handle_cmd(buf,¤t_p);
//sprintf(msgbuf,"Flip # %d of %d",count,f1);
//msg();
}
}
else if (mob.a.re==0 && mob.a.im==0){
sprintf(buf,"unflip %d %d",v1,v2);
handle_cmd(buf,¤t_p);
sprintf(buf,"repack 2000");
handle_cmd(buf,¤t_p);
sprintf(buf,"fix");
handle_cmd(buf,¤t_p);
sprintf(buf,"write /tmp/unflip.p");
handle_cmd(buf,¤t_p);
printf("unflip %d %d.\n",v1,v2);
return 0;
count=count-1;
k=k+1;
}
}
C[count]=tau;
count++;
} while (count<f1);
fp=fopen("tau.dat","w");
for (i=0;i<count;i++)
// fprintf(fp,"%d: tau = (%.12f,%.12f)\n",i,C[i].re,C[i].im);
fprintf(fp," %.12f %.12f\n",C[i].re,C[i].im);
fclose(fp);
sprintf(msgbuf,"Accesed unflip command %d times",k);
msg();
} /* jason_howard_code */
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