Fix randomrange init slowdown (scp-fs2open#7444)

BMagnu · web-flow · commit 4086db15d96f · 2026-05-08T17:43:40.000+09:00
diff --git a/code/utils/RandomRange.h b/code/utils/RandomRange.h
@@ -84,7 +84,7 @@ class RandomRange {
   public:
 	template <typename T, typename... Ts, typename = typename std::enable_if<(sizeof... (Ts) >=1 || !std::is_convertible<T, ValueType>::value) && !std::is_same_v<std::decay_t<T>, RandomRange>, int>::type>
 	explicit RandomRange(T&& distributionFirstParameter, Ts&&... distributionParameters)
-		: m_generator(std::random_device()()), m_distribution(distributionFirstParameter, distributionParameters...)
+		: m_generator(seeder()), m_distribution(distributionFirstParameter, distributionParameters...)
 	{
 		m_minValue = static_cast<ValueType>(m_distribution.min());
 		m_maxValue = static_cast<ValueType>(m_distribution.max());
@@ -98,7 +98,7 @@ class RandomRange {
 		m_constant = true;
 	}
 
-	RandomRange() : m_generator(std::random_device()()), m_distribution()
+	RandomRange() : m_generator(seeder()), m_distribution()
 	{
 		m_minValue = static_cast<ValueType>(0.0);
 		m_maxValue = static_cast<ValueType>(0.0);

Original file line number	Diff line number	Diff line change
`@@ -84,7 +84,7 @@ class RandomRange {`
`84`	`84`	`public:`
`85`	`85`	`template <typename T, typename... Ts, typename = typename std::enable_if<(sizeof... (Ts) >=1 \|\| !std::is_convertible<T, ValueType>::value) && !std::is_same_v<std::decay_t<T>, RandomRange>, int>::type>`
`86`	`86`	`explicit RandomRange(T&& distributionFirstParameter, Ts&&... distributionParameters)`
`87`		`- : m_generator(std::random_device()()), m_distribution(distributionFirstParameter, distributionParameters...)`
	`87`	`+ : m_generator(seeder()), m_distribution(distributionFirstParameter, distributionParameters...)`
`88`	`88`	`{`
`89`	`89`	`m_minValue = static_cast<ValueType>(m_distribution.min());`
`90`	`90`	`m_maxValue = static_cast<ValueType>(m_distribution.max());`
`@@ -98,7 +98,7 @@ class RandomRange {`
`98`	`98`	`m_constant = true;`
`99`	`99`	`}`
`100`	`100`
`101`		`- RandomRange() : m_generator(std::random_device()()), m_distribution()`
	`101`	`+ RandomRange() : m_generator(seeder()), m_distribution()`
`102`	`102`	`{`
`103`	`103`	`m_minValue = static_cast<ValueType>(0.0);`
`104`	`104`	`m_maxValue = static_cast<ValueType>(0.0);`