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add small helper to scalar range

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Green Sky 2023-03-04 02:35:06 +01:00
parent 7bce78167b
commit e9c62f9201
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2 changed files with 12 additions and 2 deletions
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4
framework/random/src/mm/random/srng.hpp
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@ -7,7 +7,7 @@ namespace MM::Random {
// Seeded (Pseudo-) Random Number Generator // Seeded (Pseudo-) Random Number Generator
struct SRNG { struct SRNG {
// make shuffle compat // make shuffle compat
// TODO: add more type info // TODO: add more type info
using result_type = uint32_t; using result_type = uint32_t;
@ -35,7 +35,7 @@ struct SRNG {
} }
bool roll(float prob) { bool roll(float prob) {
return zeroToOne() <= prob; return zeroToOne() <= prob; // TODO: just < ?
} }
// more advanced // more advanced

10
framework/std_utils/src/mm/scalar_range2.hpp
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@ -60,6 +60,16 @@ struct ScalarRange2 {
[[nodiscard]] constexpr bool inRange(T&& value) const { [[nodiscard]] constexpr bool inRange(T&& value) const {
return value >= min() && value <= max(); return value >= min() && value <= max();
} }
// lerp between min and max
[[nodiscard]] constexpr T map(const float a) const {
return min() * (1.f-a) + max() * a;
}
// reverse map
[[nodiscard]] constexpr float unmap(const T& v) const {
return (v - min()) / static_cast<float>(max() - min());
}
}; };
} // MM } // MM