fist normal distribuyion

BambooStick.cpp

@@ -37,7 +37,16 @@ void BambooStick::render() {
 }
 
 void BambooStick::generate() {
-    int segmentsNo = rand() % 5 + 3;
+    int segmentsNo;
+    std::default_random_engine generator;
+    std::normal_distribution<float> distribution(2.0, 0.75);
+
+    float number = distribution(generator);
+    if ((number >= 0.0) && (number < 4.0))
+        segmentsNo = (int)number + 3;
+    else 
+        segmentsNo = 5;
+
     for (int i = 0; i < segmentsNo; i++)
         segments->push_back(generateSegment());
 }

Entity.h

@@ -5,6 +5,7 @@
 #include <stdlib.h>     /* srand, rand */
 #include <time.h>       /* time */
 #include <vector>
+#include <random>
 
 class Entity {
 protected:

gkom.cpp

@@ -11,6 +11,7 @@
 #include "Floor.h"
 #include "Camera.h"
 #include "Map.h"
+#include <string>
 
 int width;
 int height;
@@ -132,6 +133,27 @@ int main(int argc, char** argv) {
     init();
 
     glutMainLoop();
+    //const int nrolls = 10000;  // number of experiments
+    //const int nstars = 100;    // maximum number of stars to distribute
+
+    //std::default_random_engine generator;
+    //std::normal_distribution<double> distribution(2.0, 0.7);
+
+    //int p[10] = {};
+
+    //for (int i = 0; i<nrolls; ++i) {
+    //    double number = 2*distribution(generator);
+    //    if ((number >= 0.0) && (number<10.0)) ++p[int(number)];
+    //}
+
+    //std::cout << "normal_distribution (5.0,2.0):" << std::endl;
+
+    //for (int i = 0; i<10; ++i) {
+    //    std::cout << i << "-" << (i + 1) << ": ";
+    //    std::cout << std::string(p[i] * nstars / nrolls, '*') << std::endl;
+    //}
+    //
+    //std::cin.get();
 
     return 0;
 }