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Make BVH faster by doing hit test on bbox before descending.

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This commit is contained in:
Bill Thiede 2018-09-22 12:06:29 -07:00
parent fedcd3792b
commit 02639e4d3f
1 changed files with 20 additions and 11 deletions
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31
rtiow/src/bvh.rs
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@ -221,16 +221,25 @@ impl Hit for BVHNode {
BVHNode::Branch {
ref left,
ref right,
..
} => match (left.hit(r, t_min, t_max), right.hit(r, t_min, t_max)) {
(Some(hit_left), Some(hit_right)) => if hit_left.t < hit_right.t {
return Some(hit_left);
} else {
return Some(hit_right);
},
(Some(hit_left), None) => Some(hit_left),
(None, Some(hit_right)) => Some(hit_right),
(None, None) => None,
ref bbox,
} => match bbox {
Some(ref bbox) => {
if bbox.hit(r, t_min, t_max) {
match (left.hit(r, t_min, t_max), right.hit(r, t_min, t_max)) {
(Some(hit_left), Some(hit_right)) => if hit_left.t < hit_right.t {
return Some(hit_left);
} else {
return Some(hit_right);
},
(Some(hit_left), None) => return Some(hit_left),
(None, Some(hit_right)) => return Some(hit_right),
(None, None) => return None,
};
} else {
return None;
}
}
None => None,
},
}
}
@ -252,7 +261,7 @@ impl BVH {
let count = l.len();
let start = Instant::now();
let bvh = BVH {
root: BVHNode::new_sah(l, t_min, t_max),
root: BVHNode::new_dumb(l, t_min, t_max),
};
let runtime = start.elapsed();
info!(