From 76afb19e3dbef1589ce24de9645af0f61929699f Mon Sep 17 00:00:00 2001
From: hanemile <emile.hansmaennel@gmail.com>
Date: Tue, 2 Jan 2018 03:32:05 +0100
Subject: working :D

---
 src/c/run   | Bin 0 -> 13472 bytes
 src/c/run.c | 139 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 139 insertions(+)
 create mode 100755 src/c/run
 create mode 100644 src/c/run.c

(limited to 'src')

diff --git a/src/c/run b/src/c/run
new file mode 100755
index 0000000..24029d8
Binary files /dev/null and b/src/c/run differ
diff --git a/src/c/run.c b/src/c/run.c
new file mode 100644
index 0000000..838d294
--- /dev/null
+++ b/src/c/run.c
@@ -0,0 +1,139 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <math.h>
+
+// Define some constants
+int range_max = 1e5;
+int range_min = -1e5;
+
+// Define some variables
+int sigma = 200;
+float f_0 = 0.1;
+float R_s = 1e4;
+
+// Define some constants
+float G = 4.302e-3;
+
+// Prototype pythagoras function
+float pythagoras(float x, float y, float z);
+// More prototypes
+float rho(float r);
+float phi(float x);
+
+int main(int argc, char *argv[] ){
+  // Seed random
+  srand(time(NULL));
+
+  // Define the number of stars that should be generated using command line
+  // arguments
+
+  long num_of_stars = atoi(argv[1]);
+
+  // define an array to store the coordinates of the stars in
+
+  FILE * st = fopen("stars/1.csv", "w+");
+
+  /*
+    Generate random coordinates
+  */
+
+  printf(">>> Generating %d random coordinates\n", num_of_stars);
+
+  // generate the random coordinates
+  for(int i = 0; i < num_of_stars; i++){
+    int x = rand() % (range_max - range_min + 1) + range_min;
+    int y = rand() % (range_max - range_min + 1) + range_min;
+    int z = rand() % (range_max - range_min + 1) + range_min;
+
+    fprintf(st, "%d, ", x);
+    fprintf(st, "%d, ", y);
+    fprintf(st, "%d, ", z);
+
+    fprintf(st, "%f", pythagoras(x, y, z));
+    fprintf(st, "\n");
+  }
+
+  fclose(st);
+
+  printf("  -> Done.\n\n");
+
+  /*
+    Generate a lookuptable
+  */
+
+  printf(">>> Generating a lookuptable\n");
+
+  // If the correct amount (2) of command line arguments are given, continue
+  if( argc == 2 ) {
+
+    // Print out how many stars are being generated
+    printf("  -> Generating %d Values...\n", num_of_stars);
+
+    char *filename = "testFile.csv";
+
+    printf("  -> Writing data to '%s'\n", filename);
+
+    // Open a file into which the lookuptable wil be written
+    FILE * fp = fopen(filename, "w+");
+
+    // Abourt if no file is specified
+    if(fp == NULL){
+      printf("Error opening the file!\n");
+      exit(1);
+    }
+
+    // generate the lookuptable
+    for(int i = 0; i < num_of_stars; i++){
+      fprintf(fp, "%d, %f\n", i, phi(i));
+    }
+
+    // close the file now containing the lookuptable
+    fclose(fp);
+
+    printf("  -> Done.\n\n");
+
+  }
+  // Exception: to many arguments
+  else if( argc > 2 ) {
+    printf("Too many arguments supplied.\n");
+    return 0;
+  }
+  // Exception: no argument specified
+  else {
+    printf("One argument expected.\n");
+    return 0;
+  }
+
+  // Test if the Star should be generated or not
+
+    // If the star should be generated, write it's coordinates to a file
+    // Else do nothing
+
+  return 0;
+}
+
+// Define the Pythagorean theorem
+float pythagoras(float x, float y, float z){
+  return sqrt(pow(x, 2) + pow(y, 2) + pow(z, 2));
+}
+
+// Define rho function
+float rho(float r){
+  float a = (1) / ( sqrt(2 * M_PI) * sigma);
+  float b = exp( - (phi(r) / pow(sigma, 2) ));
+  return a;
+}
+
+// Define phi function
+float phi(float x){
+  if(x == 0) {
+    float a = -4 * M_PI * f_0 * G * pow(R_s, 2);
+    return(a);
+  }
+  else {
+    float a = - (4 * M_PI * G * f_0 * pow(R_s, 3) / x);
+    float b = log(1 + (x / R_s) );
+    return(a * b);
+  }
+}
-- 
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