From c9db08cb0a48904848baf793a58b9388abddca8e Mon Sep 17 00:00:00 2001
From: Green Sky <green@g-s.xyz>
Date: Mon, 21 Jun 2021 23:07:48 +0200
Subject: [PATCH] srng: impl floating point numbers and make std dist compat

---
 framework/random/src/mm/random/srng.cpp      | 14 ++++++++++++++
 framework/random/src/mm/random/srng.hpp      | 16 +++++++++++++++-
 framework/std_utils/src/mm/scalar_range2.hpp |  5 +++++
 3 files changed, 34 insertions(+), 1 deletion(-)

diff --git a/framework/random/src/mm/random/srng.cpp b/framework/random/src/mm/random/srng.cpp
index 1f8035e..dcf7f40 100644
--- a/framework/random/src/mm/random/srng.cpp
+++ b/framework/random/src/mm/random/srng.cpp
@@ -1,2 +1,16 @@
 #include "./srng.hpp"
 
+namespace MM::Random {
+
+template<>
+double SRNG::range(const ScalarRange2<double>& range) {
+	return zeroToOne() * (range.max() - range.min()) + range.min();
+}
+
+template<>
+float SRNG::range(const ScalarRange2<float>& range) {
+	return zeroToOne() * (range.max() - range.min()) + range.min();
+}
+
+} // MM::Random
+
diff --git a/framework/random/src/mm/random/srng.hpp b/framework/random/src/mm/random/srng.hpp
index 9c0d3f6..7899461 100644
--- a/framework/random/src/mm/random/srng.hpp
+++ b/framework/random/src/mm/random/srng.hpp
@@ -37,7 +37,6 @@ struct SRNG {
 	// more advanced
 
 	// inclusive
-	// TODO: test for floats
 	template<typename T>
 	T range(const ScalarRange2<T>& range) {
 		return (getNext() % ((range.max() - range.min()) + 1)) + range.min();
@@ -51,7 +50,22 @@ struct SRNG {
 	bool operator()(float prob) {
 		return roll(prob);
 	}
+
+	// std:: distributions need those
+	constexpr static uint32_t min(void) {
+		return 0;
+	}
+
+	constexpr static uint32_t max(void) {
+		return 0xffffffff;
+	}
 };
 
+template<>
+double SRNG::range(const ScalarRange2<double>& range);
+
+template<>
+float SRNG::range(const ScalarRange2<float>& range);
+
 } // MM::Random
 
diff --git a/framework/std_utils/src/mm/scalar_range2.hpp b/framework/std_utils/src/mm/scalar_range2.hpp
index 45ab7a8..bc230f1 100644
--- a/framework/std_utils/src/mm/scalar_range2.hpp
+++ b/framework/std_utils/src/mm/scalar_range2.hpp
@@ -9,6 +9,11 @@ struct ScalarRange2 {
 
 	ScalarRange2(void) = default;
 
+	ScalarRange2(const T& both) noexcept {
+		v_min = both;
+		v_max = both;
+	}
+
 	ScalarRange2(const T& min, const T& max) noexcept {
 		if (min <= max) {
 			v_min = min;