From 2114472cdcc3dc98f31f44f104148baaf4058651 Mon Sep 17 00:00:00 2001
From: hackbard <hackbard>
Date: Fri, 28 Mar 2003 14:34:42 +0000
Subject: [PATCH] added amorphous pressure ~1/r^2

---
 defines.h |  4 ++-
 main.c    | 74 ++++++++++++++++++++++++++++++++++---------------------
 random.c  |  3 ++-
 3 files changed, 51 insertions(+), 30 deletions(-)

diff --git a/defines.h b/defines.h
index 8305711..981ab45 100644
--- a/defines.h
+++ b/defines.h
@@ -9,6 +9,8 @@
 #include <directfb.h>
 #endif
 
+#define NOT_SPECIFIED 0
+
 #define DEFAULT_X_SEG 50
 #define DEFAULT_Y_SEG 50
 #define DEFAULT_Z_SEG 100
@@ -24,7 +26,7 @@
 /* program defines, dont touch ;) */
 
 #define URAND_MAX 0xffffffff
-#define URAND_2_MAX 0xffff
+#define URAND_2BYTE_MAX 0xffff
 
 typedef unsigned int u32;
 typedef long long unsigned int u64;
diff --git a/main.c b/main.c
index d508e7d..9306e60 100644
--- a/main.c
+++ b/main.c
@@ -27,6 +27,7 @@
 
 /* global variables */
 u32 sum_z_cells;
+u32 sum_range_rate;
 int random_fd; /* /dev/urandom file descriptor */
 
 int usage()
@@ -44,7 +45,8 @@ int usage()
  puts("-Z <value> \t display area intercept point z (default # z cells / 2)");
  puts("-d <value> \t refresh every <value> loops (default 100)");
  puts("-r <value> \t pressure range from amorphous SiCx (default 2)");
- puts("-f <value> \t faktor for pressure from amorphous SiCx (default 1)");
+ puts("-f <value> \t (unused) faktor for pressure from amorphous SiCx (default 1)");
+ puts("-p <value> \t p0 for propability of cell getting amorph (default sum_range_rate / 4)");
  return -23;
 }
 
@@ -61,38 +63,34 @@ int make_cryst(u32 *cell)
 }
 
 /* look at cell ... */
-int process_cell(void *cell_p,u32 x,u32 y,u32 z,u32 x_max,u32 y_max,u32 z_max,int range,int faktor)
+int process_cell(void *cell_p,u32 x,u32 y,u32 z,u32 x_max,u32 y_max,u32 z_max,int range,int faktor,int p0)
 {
- /* is amorph? */
  u32 *cell;
- int i,j,k;
- float count;
+ int i,j,k,count;
+ // float count;
  cell=(u32 *)(cell_p+x+y*(x_max-1)+z*(x_max-1)*(y_max-1));
- count=0;
+ count=p0;
  for(i=-range;i<=range;i++)
+ {
   for(j=-range;j<=range;j++)
+  {
    for(k=-range;k<=range;k++)
-    if(!(i==0 && j==0 && k==0) && (x>=range && x<x_max-range) \
-        && (y>=range && y<y_max-range) && (z>=range && z<z_max-range))
-     if(*(u32 *)(cell_p+(x+i)+(y+j)*(x_max-1)+(z+k)*(x_max-1)*(y_max-1))&AMORPH)
-      // total+=range*range-
-      count+=0.01*faktor*1.0/(i*i+j*j+k*k);
- /* count is propability of cell getting amorph */
- /* for now assume 1 - ~ is propability of cell getting cryst if allready amorphous */    
+   {
+    if(!(i==0 && j==0 && k==0))
+    {
+     if(*(u32 *)(cell_p+((x+x_max+i)%x_max)+((y+j+y_max)%y_max)*(x_max-1)+((z+k+z_max)%z_max)*(x_max-1)*(y_max-1))&AMORPH) count+=(3*range*range-i*i-j*j-k*k);
+    }
+   }
+  }
+ }
+ // count+=faktor*1.0/(i*i+j*j+k*k);
  if(*cell&AMORPH)
  {
-  if((1-count)*URAND_2_MAX<=rand_get(URAND_2_MAX))
-  {  
-   printfd("cell getting cryst. ...(%f)\n",(1-count));
-   make_cryst(cell);
-  }
+  /* wrong propability! just test by now ...*/
+  if(rand_get(sum_range_rate)>count) make_cryst(cell);
  } else
  {
-  if(count*URAND_2_MAX<=rand_get(URAND_2_MAX))
-  {
-   printfd("cell getting amorph ...(%f)\n",count);
-   make_amorph(cell);
-  }
+  if(rand_get(sum_range_rate)<=count) make_amorph(cell);
  }
  return 23;
 }
@@ -101,9 +99,9 @@ int main(int argc,char **argv)
 {
  u32 x_cell,y_cell,z_cell; /* amount of segments */
  u32 x,y,z; /* cells */
- int i; /* for counting */
+ int i,j,k; /* for counting */
  int slope_nel,start_nel; /* nuclear energy loss: slope, constant */
- int a_p_range,a_p_faktor; /* pressure range and faktor from amorphous sic */
+ int a_p_range,a_p_faktor,a_p_p0; /* p. range, p0 and faktor of amorphous sic */
  int steps; /* # steps */
  void *cell_p;
  struct __display display;
@@ -118,6 +116,7 @@ int main(int argc,char **argv)
  start_nel=DEFAULT_START_NEL;
  a_p_range=DEFAULT_A_P_RANGE;
  a_p_faktor=DEFAULT_A_P_FAKTOR;
+ a_p_p0=NOT_SPECIFIED;
  steps=DEFAULT_STEPS;
  display_x=x_cell/2;
  display_y=y_cell/2;
@@ -171,6 +170,9 @@ int main(int argc,char **argv)
     case 'f':
      a_p_faktor=atoi(argv[++i]);
      break;
+    case 'p':
+     a_p_p0=atoi(argv[++i]);
+     break;
     default:
      usage();
      return -23;
@@ -185,10 +187,26 @@ int main(int argc,char **argv)
   return -23;
  }
 
- /* calculate sum_z_cells one time! */
+ /* calculate sum_z_cells, sum_range_rate one time! */
  sum_z_cells=0;
  for(i=1;i<=z_cell;i++) sum_z_cells+=(start_nel+i*slope_nel);
- printfd("debug: sum z cells -> %d\n",sum_z_cells);
+ printfd("debug: sum z cells -> %u\n",sum_z_cells);
+ sum_range_rate=0;
+ for(i=-a_p_range;i<=a_p_range;i++)
+ {
+  for(j=-a_p_range;j<=a_p_range;j++)
+  {
+   for(k=-a_p_range;k<=a_p_range;k++)
+   {
+    if(!(i==0 && j==0 && k==0))
+     sum_range_rate+=((3*a_p_range*a_p_range)-i*i-j*j-k*k);
+   }
+  }
+ }
+ printfd("debug: sum range rate -> %u\n",sum_range_rate);
+ /* add a_p_p0 ... */
+ if(a_p_p0==NOT_SPECIFIED) a_p_p0=sum_range_rate/4;
+ sum_range_rate+=a_p_p0;
 
 
  /* testing ... */
@@ -216,7 +234,7 @@ int main(int argc,char **argv)
   // distrib_c_conc(cell_p);
 
   // process_cell((u32 *)(cell_p+x+y*(x_cell-1)+z*(x_cell-1)*(y_cell-1)));
-  process_cell(cell_p,x,y,z,x_cell,y_cell,z_cell,a_p_range,a_p_faktor);
+  process_cell(cell_p,x,y,z,x_cell,y_cell,z_cell,a_p_range,a_p_faktor,a_p_p0);
 
   /* display stuff */
   if((i%display_refresh_rate)==0) 
diff --git a/random.c b/random.c
index 3fbf912..51b310b 100644
--- a/random.c
+++ b/random.c
@@ -27,7 +27,8 @@ u32 rand_get(u32 max)
 }
 
 /* get z value (linear growth of probability with depths) */
-u32 rand_get_lgp(int slope_nel,int start_nel) {
+u32 rand_get_lgp(int slope_nel,int start_nel)
+{
  int z;
  u32 i;
  z=rand_get(sum_z_cells)+1; /* +1 as rand_get returns values 0...max-1 */
-- 
2.20.1