Expose `randfn` to global scope

2 files changed, 30 insertions, 12 deletions

diff --git a/modules/mono/glue/GodotSharp/GodotSharp/Core/GD.cs b/modules/mono/glue/GodotSharp/GodotSharp/Core/GD.cs
index ef42374041..a3afc83222 100644
--- a/modules/mono/glue/GodotSharp/GodotSharp/Core/GD.cs
+++ b/modules/mono/glue/GodotSharp/GodotSharp/Core/GD.cs
@@ -323,6 +323,16 @@ namespace Godot
         }
 
         /// <summary>
+        /// Returns a normally-distributed pseudo-random number, using Box-Muller transform with the specified <c>mean</c> and a standard <c>deviation</c>.
+        /// This is also called Gaussian distribution.
+        /// </summary>
+        /// <returns>A random normally-distributed <see langword="float"/> number.</returns>
+        public static double Randfn(double mean, double deviation)
+        {
+            return godot_icall_GD_randfn(mean, deviation);
+        }
+
+        /// <summary>
         /// Returns a random unsigned 32-bit integer.
         /// Use remainder to obtain a random value in the interval <c>[0, N - 1]</c> (where N is smaller than 2^32).
         /// </summary>
@@ -564,19 +574,22 @@ namespace Godot
         internal static extern void godot_icall_GD_printt(object[] what);
 
         [MethodImpl(MethodImplOptions.InternalCall)]
-        internal static extern float godot_icall_GD_randf();
+        internal static extern void godot_icall_GD_randomize();
 
         [MethodImpl(MethodImplOptions.InternalCall)]
         internal static extern uint godot_icall_GD_randi();
 
         [MethodImpl(MethodImplOptions.InternalCall)]
-        internal static extern void godot_icall_GD_randomize();
+        internal static extern float godot_icall_GD_randf();
+
+        [MethodImpl(MethodImplOptions.InternalCall)]
+        internal static extern int godot_icall_GD_randi_range(int from, int to);
 
         [MethodImpl(MethodImplOptions.InternalCall)]
         internal static extern double godot_icall_GD_randf_range(double from, double to);
 
         [MethodImpl(MethodImplOptions.InternalCall)]
-        internal static extern int godot_icall_GD_randi_range(int from, int to);
+        internal static extern double godot_icall_GD_randfn(double mean, double deviation);
 
         [MethodImpl(MethodImplOptions.InternalCall)]
         internal static extern uint godot_icall_GD_rand_seed(ulong seed, out ulong newSeed);
diff --git a/modules/mono/glue/gd_glue.cpp b/modules/mono/glue/gd_glue.cpp
index a2ff868f65..07ddf5d945 100644
--- a/modules/mono/glue/gd_glue.cpp
+++ b/modules/mono/glue/gd_glue.cpp
@@ -182,26 +182,30 @@ void godot_icall_GD_printt(MonoArray *p_what) {
 	print_line(str);
 }
 
-float godot_icall_GD_randf() {
-	return Math::randf();
+void godot_icall_GD_randomize() {
+	Math::randomize();
 }
 
 uint32_t godot_icall_GD_randi() {
 	return Math::rand();
 }
 
-void godot_icall_GD_randomize() {
-	Math::randomize();
+float godot_icall_GD_randf() {
+	return Math::randf();
 }
 
-double godot_icall_GD_randf_range(double from, double to) {
+int32_t godot_icall_GD_randi_range(int32_t from, int32_t to) {
 	return Math::random(from, to);
 }
 
-int32_t godot_icall_GD_randi_range(int32_t from, int32_t to) {
+double godot_icall_GD_randf_range(double from, double to) {
 	return Math::random(from, to);
 }
 
+double godot_icall_GD_randfn(double mean, double deviation) {
+	return Math::randfn(mean, deviation);
+}
+
 uint32_t godot_icall_GD_rand_seed(uint64_t seed, uint64_t *newSeed) {
 	uint32_t ret = Math::rand_from_seed(&seed);
 	*newSeed = seed;
@@ -300,11 +304,12 @@ void godot_register_gd_icalls() {
 	GDMonoUtils::add_internal_call("Godot.GD::godot_icall_GD_printraw", godot_icall_GD_printraw);
 	GDMonoUtils::add_internal_call("Godot.GD::godot_icall_GD_prints", godot_icall_GD_prints);
 	GDMonoUtils::add_internal_call("Godot.GD::godot_icall_GD_printt", godot_icall_GD_printt);
-	GDMonoUtils::add_internal_call("Godot.GD::godot_icall_GD_randf", godot_icall_GD_randf);
-	GDMonoUtils::add_internal_call("Godot.GD::godot_icall_GD_randi", godot_icall_GD_randi);
 	GDMonoUtils::add_internal_call("Godot.GD::godot_icall_GD_randomize", godot_icall_GD_randomize);
-	GDMonoUtils::add_internal_call("Godot.GD::godot_icall_GD_randf_range", godot_icall_GD_randf_range);
+	GDMonoUtils::add_internal_call("Godot.GD::godot_icall_GD_randi", godot_icall_GD_randi);
+	GDMonoUtils::add_internal_call("Godot.GD::godot_icall_GD_randf", godot_icall_GD_randf);
 	GDMonoUtils::add_internal_call("Godot.GD::godot_icall_GD_randi_range", godot_icall_GD_randi_range);
+	GDMonoUtils::add_internal_call("Godot.GD::godot_icall_GD_randf_range", godot_icall_GD_randf_range);
+	GDMonoUtils::add_internal_call("Godot.GD::godot_icall_GD_randfn", godot_icall_GD_randfn);
 	GDMonoUtils::add_internal_call("Godot.GD::godot_icall_GD_rand_seed", godot_icall_GD_rand_seed);
 	GDMonoUtils::add_internal_call("Godot.GD::godot_icall_GD_seed", godot_icall_GD_seed);
 	GDMonoUtils::add_internal_call("Godot.GD::godot_icall_GD_str", godot_icall_GD_str);