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Make MIS routines handle infinite importance better.

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Handle it like the limit case: as A approaches infinity, the
limit approaches 1.0.  Before this, we were getting NaN values.
This fixes that.
This commit is contained in:
Nathan Vegdahl 2017-10-25 07:11:24 -07:00
parent 6ff226f4fa
commit 3de276cbaa
1 changed files with 14 additions and 6 deletions
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20
src/mis.rs
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@ -1,13 +1,21 @@
#![allow(dead_code)]
pub fn balance_heuristic(a: f32, b: f32) -> f32 {
let mis_fac = a / (a + b);
a / mis_fac
if a.is_infinite() {
a
} else {
let mis_fac = a / (a + b);
a / mis_fac
}
}
pub fn power_heuristic(a: f32, b: f32) -> f32 {
let a2 = a * a;
let b2 = b * b;
let mis_fac = a2 / (a2 + b2);
a / mis_fac
if a.is_infinite() {
a
} else {
let a2 = a * a;
let b2 = b * b;
let mis_fac = a2 / (a2 + b2);
a / mis_fac
}
}