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library: render: mesh: from_slice to build Vector

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Antoine Martin 2020-03-27 12:08:17 +01:00 committed by Bruno BELANYI
parent f0d36c7d7b
commit cca40bcb8e
1 changed files with 7 additions and 16 deletions
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23
pathtracer/src/render/mesh.rs
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@ -1,7 +1,7 @@
use std::convert::TryFrom;
use std::path::PathBuf;
use nalgebra::{Similarity3, Unit};
use nalgebra::{Similarity3, Unit, VectorSlice3};
use serde::Deserialize;
@ -69,27 +69,18 @@ impl TryFrom<Wavefront> for Mesh {
// We apply the (arguably useless) scaling to the vectors in case it is
// negative, which would invert their direction
let norm_a = {
let vec = Vector::new(
mesh.normals[a * 3],
mesh.normals[a * 3 + 1],
mesh.normals[a * 3 + 2],
);
let vec: Vector =
VectorSlice3::from_slice(&mesh.normals[(a * 3)..(a * 3 + 3)]).into();
Unit::new_normalize(transform * vec)
};
let norm_b = {
let vec = Vector::new(
mesh.normals[b * 3],
mesh.normals[b * 3 + 1],
mesh.normals[b * 3 + 2],
);
let vec: Vector =
VectorSlice3::from_slice(&mesh.normals[(b * 3)..(b * 3 + 3)]).into();
Unit::new_normalize(transform * vec)
};
let norm_c = {
let vec = Vector::new(
mesh.normals[c * 3],
mesh.normals[c * 3 + 1],
mesh.normals[c * 3 + 2],
);
let vec: Vector =
VectorSlice3::from_slice(&mesh.normals[(c * 3)..(c * 3 + 3)]).into();
Unit::new_normalize(transform * vec)
};