23 lines
436 B
Rust
23 lines
436 B
Rust
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/// Stateful RNG
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pub struct RNG {
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pub seed: u32,
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}
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impl RNG {
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pub fn new() -> Self {
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Self {
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seed: 0,
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}
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}
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pub fn next(&mut self) -> u32 {
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// MSVC LCG values
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self.seed = self.seed.wrapping_mul(214013).wrapping_add(2531011);
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self.seed
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}
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pub fn range(&mut self, start: i32, end: i32) -> i32 {
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start + (self.next() % (end - start) as u32) as i32
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}
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}
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