Mirrors/rodio
2
0
Fork 0
mirror of https://github.com/RustAudio/rodio synced 2024-09-20 14:12:02 +00:00
Code Issues Projects Releases Packages Wiki Activity

Save two multiplications

Browse source
This commit is contained in:
est31 2019-08-09 21:10:09 +02:00
parent a15ca2b43e
commit fb5d8eb9d8
1 changed files with 10 additions and 9 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

19
src/source/spatial.rs
View file

@ -15,11 +15,10 @@ where
input: ChannelVolume<I>, input: ChannelVolume<I>,
} }
fn dist(a: [f32; 3], b: [f32; 3]) -> f32 { fn dist_sq(a: [f32; 3], b: [f32; 3]) -> f32 {
a.iter().zip(b.iter()) a.iter().zip(b.iter())
.map(|(a, b)| (a - b) * (a - b)) .map(|(a, b)| (a - b) * (a - b))
.sum::<f32>() .sum::<f32>()
.sqrt()
} }
impl<I> Spatial<I> impl<I> Spatial<I>
@ -45,13 +44,15 @@ where
pub fn set_positions( pub fn set_positions(
&mut self, emitter_pos: [f32; 3], left_ear: [f32; 3], right_ear: [f32; 3], &mut self, emitter_pos: [f32; 3], left_ear: [f32; 3], right_ear: [f32; 3],
) { ) {
let left_distance = dist(left_ear, emitter_pos); let left_dist_sq = dist_sq(left_ear, emitter_pos);
let right_distance = dist(right_ear, emitter_pos); let right_dist_sq = dist_sq(right_ear, emitter_pos);
let max_diff = dist(left_ear, right_ear); let max_diff = dist_sq(left_ear, right_ear).sqrt();
let left_diff_modifier = ((left_distance - right_distance) / max_diff + 1.0) / 4.0 + 0.5; let left_dist = left_dist_sq.sqrt();
let right_diff_modifier = ((right_distance - left_distance) / max_diff + 1.0) / 4.0 + 0.5; let right_dist = right_dist_sq.sqrt();
let left_dist_modifier = (1.0 / left_distance.powi(2)).min(1.0); let left_diff_modifier = ((left_dist - right_dist) / max_diff + 1.0) / 4.0 + 0.5;
let right_dist_modifier = (1.0 / right_distance.powi(2)).min(1.0); let right_diff_modifier = ((right_dist - left_dist) / max_diff + 1.0) / 4.0 + 0.5;
let left_dist_modifier = (1.0 / left_dist_sq).min(1.0);
let right_dist_modifier = (1.0 / right_dist_sq).min(1.0);
self.input self.input
.set_volume(0, left_diff_modifier * left_dist_modifier); .set_volume(0, left_diff_modifier * left_dist_modifier);
self.input self.input