From: hackbard <hackbard>
Date: Wed, 2 Jun 2004 15:12:26 +0000 (+0000)
Subject: new default values, first attempts of rejection method for random n generation
X-Git-Url: https://hackdaworld.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=de3ae9b29a64eaf297b44665022665962eba4a14;p=physik%2Fnlsop.git

new default values, first attempts of rejection method for random n generation
---

diff --git a/nlsop.c b/nlsop.c
index 5d44239..0104695 100644
--- a/nlsop.c
+++ b/nlsop.c
@@ -130,7 +130,9 @@ int distrib_c(d3_lattice *d3_l,info *my_info,int step,double c_ratio)
  {
   x=get_rand(d3_l->max_x);
   y=get_rand(d3_l->max_y);
+  // printf("nd: %d %d\n",x,y);
   z=get_rand_lgp(d3_l->max_z,my_info->a_cd,my_info->b_cd);
+  // printf("ld: %d\n",z);
   *(d3_l->extra+x+y*d3_l->max_x+z*d3_l->max_x*d3_l->max_y)+=1;
   (my_info->cc)++;
  }
@@ -692,6 +694,42 @@ int get_c_ratio(double *c_ratio,char *pfile,info *my_info,d3_lattice *d3_l)
  return 1;
 }
 
+int get_reject_graph(info *my_info,d3_lattice *d3_l,char *file,u32 *graph) {
+ double a,b;
+ int i,j,k;
+ int fd;
+ char buf[32],*p;
+
+ if((fd=open(file,O_RDONLY))<0)
+ {
+  puts("cannot open file to calculate rejection graph");
+  return -1;
+ }
+ memset(graph,0,d3_l->max_z*sizeof(u32));
+ /* get fixpoints */
+ k=1;
+ while(k)
+ {
+  for(i=0;i<32;i++)
+  {
+   k=read(fd,&buf[i],1);
+   if((buf[i]=='\n')||(k==0)) break;
+  }
+  if(k)
+  {
+   p=strtok(buf," ");
+   a=atof(p)/10; /* nm */
+   p=strtok(NULL," ");
+   b=atof(p);
+   if(a>d3_l->max_z*CELL_LENGTH) k=0;
+   else graph[(int)(a/CELL_LENGTH)]=(int)(URAND_MAX*b);
+  }
+ }
+ /* do interpolation here! */
+
+ return 1;
+}
+
 int main(int argc,char **argv)
 {
  u32 x,y,z,x_c,y_c,z_c;
@@ -927,10 +965,10 @@ int main(int argc,char **argv)
  sprintf(s_txt,"steps: %d",my_info.steps);
  sprintf(dose_txt,"dose: %.2fe+17 C/cm²",my_info.steps*1.0/(d3_l.max_x*d3_l.max_y*CELL_LENGTH*CELL_LENGTH*1000));
  sprintf(r_txt,"pressure range: %d",my_info.range);
- sprintf(ap_txt,"a_ap: %.3f  b_ap: %.3f",my_info.a_ap,my_info.b_ap);
+ sprintf(ap_txt,"a_ap: %.4f  b_ap: %.3f",my_info.a_ap,my_info.b_ap);
  sprintf(el_txt,"a_el: %.3f  b_el: %.3f",my_info.a_el,my_info.b_el);
  sprintf(cd_txt,"a_cd: %.3f  b_cd: %.3f",my_info.a_cd,my_info.b_cd);
- sprintf(cp_txt,"a_cp: %.4f",my_info.a_cp);
+ sprintf(cp_txt,"a_cp: %.5f",my_info.a_cp);
  sprintf(dr_ac_txt,"a/c diffusion rate: %.4f",my_info.dr_ac);
  if(my_info.c_diff!=0) sprintf(dr_cc_txt,"c/c diffusion rate: %.4f",my_info.dr_cc);
  else sprintf(dr_cc_txt,"c/c diffusion rate: none");
diff --git a/nlsop.h b/nlsop.h
index bb3307f..10d2a43 100644
--- a/nlsop.h
+++ b/nlsop.h
@@ -26,10 +26,10 @@ typedef struct __info
 #define Y 64
 #define Z 100
 
-#define STEPS 30000000
+#define STEPS 100000000
 #define RANGE 5
 #define REFRESH 100000
-#define RESAVE 1000000
+#define RESAVE 10000000
 
 #define A_CD 1.
 #define B_CD .0
@@ -38,12 +38,12 @@ typedef struct __info
 
 #define DR_AC .5
 #define DR_CC .2
-#define DIFF_RATE 100
+#define DIFF_RATE 1000
 
-#define A_AP .003
+#define A_AP .0005
 #define B_AP .0
 
-#define A_CP .0001
+#define A_CP .00001
 
 #define MAX_CHARS 128
 #define MAX_TXT 32
diff --git a/random.c b/random.c
index 6690531..ec99a33 100644
--- a/random.c
+++ b/random.c
@@ -73,3 +73,18 @@ u32 get_rand_lgp(u32 max,double a,double b)
  return((u32)(1.0*max*(-1.0*b+sqrt(b*b+2*a*((b+a/2)*get_rand(URAND_MAX)/((long long unsigned int)URAND_MAX+1))))/a));
 }
 
+u32 get_rand_reject(u32 max_x,u32 max_y,u32 *graph)
+{
+ u32 x,y;
+ unsigned char ok;
+
+ ok=0;
+ while(!ok)
+ {
+  x=get_rand(max_x);
+  y=get_rand(max_y);
+  if(y<=graph[x]) ok=1;
+ }
+
+ return y;
+}
diff --git a/random.h b/random.h
index e443f81..a578afb 100644
--- a/random.h
+++ b/random.h
@@ -17,6 +17,7 @@ int rand_init(char *rf);
 int rand_close(void);
 u32 get_rand(u32 max);
 u32 get_rand_lgp(u32 max,double a,double b);
+u32 get_rand_reject(u32 max_x,u32 max_y,u32 *graph);
 
 #define BUFSIZE (16*1048576) /* 64 MByte */
 #define URAND_MAX 0xffffffff