implement movement

1 files changed, 32 insertions, 0 deletions

diff --git a/backend/RNG.cpp b/backend/RNG.cpp
new file mode 100644
index 0000000..bc3e57b
--- /dev/null
+++ b/backend/RNG.cpp
@@ -0,0 +1,32 @@
+#include "RNG.h"
+
+using std::uniform_int_distribution;
+using std::uniform_real_distribution;
+
+RNG::RNG() : dev(), rng(dev()) { }
+
+RNG & RNG::get() {
+	static RNG instance;
+	return instance;
+}
+
+int RNG::rand_int(const int upper) {
+	return this->rand_int(0, upper);
+}
+int RNG::rand_int(const int lower, const int upper) {
+	uniform_int_distribution<int> random_dist(lower, upper);
+	return random_dist(rng);
+}
+
+double RNG::rand_double() {
+	return this->rand_double(0.f, 1.f);
+}
+double RNG::rand_double(const double lower, const double upper) {
+	uniform_real_distribution<double> random_dist(lower, upper);
+	return random_dist(rng);
+}
+
+bool RNG::rand_bool() {
+	return rand_int(0, 1);
+}
+