42 lines
1.3 KiB
Rust
Executable File
42 lines
1.3 KiB
Rust
Executable File
use crate::defines::LevelInt;
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/// A growth rate defines how much experience is required per level.
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pub trait GrowthRate {
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/// Calculate the level something with this growth rate would have at a certain experience.
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fn calculate_level(&self, experience: u32) -> LevelInt;
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/// Calculate the experience something with this growth rate would have at a certain level.
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fn calculate_experience(&self, level: LevelInt) -> u32;
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}
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/// An implementation of the growth rate that uses a lookup table for experience.
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pub struct LookupGrowthRate {
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/// The lookup Vec.
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experience: Vec<u32>,
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}
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impl LookupGrowthRate {
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/// Instantiates a new lookup growth rate.
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pub fn new(experience: Vec<u32>) -> LookupGrowthRate {
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LookupGrowthRate { experience }
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}
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}
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impl GrowthRate for LookupGrowthRate {
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fn calculate_level(&self, experience: u32) -> LevelInt {
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for (i, v) in self.experience.iter().enumerate() {
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if *v > experience {
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return i as LevelInt;
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}
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}
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self.experience.len() as LevelInt
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}
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fn calculate_experience(&self, level: LevelInt) -> u32 {
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if level >= self.experience.len() as LevelInt {
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*self.experience.last().unwrap()
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} else {
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self.experience[(level - 1) as usize]
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}
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}
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}
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