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Add euler iterators

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This commit is contained in:
Magnus Ulimoen
2021-03-26 19:40:04 +01:00
parent 9e2ce3ae24
commit 22a3464326
1 changed files with 55 additions and 21 deletions
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76
euler/src/lib.rs
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@@ -325,6 +325,49 @@ impl Field {
&vortex_param,
)
}
fn iter(&self) -> impl ExactSizeIterator<Item = FieldValue> + '_ {
let n = self.nx() * self.ny();
let slice = self.0.as_slice().unwrap();
let rho = &slice[0 * n..1 * n];
let rhou = &slice[1 * n..2 * n];
let rhov = &slice[2 * n..3 * n];
let e = &slice[3 * n..4 * n];
rho.iter()
.zip(rhou)
.zip(rhov)
.zip(e)
.map(|(((&rho, &rhou), &rhov), &e)| FieldValue { rho, rhou, rhov, e })
}
fn iter_mut(&mut self) -> impl ExactSizeIterator<Item = FieldValueMut<'_>> + '_ {
let n = self.nx() * self.ny();
let slice = self.0.as_slice_mut().unwrap();
let (rho, slice) = slice.split_at_mut(n);
let (rhou, slice) = slice.split_at_mut(n);
let (rhov, slice) = slice.split_at_mut(n);
let (e, slice) = slice.split_at_mut(n);
assert_eq!(slice.len(), 0);
rho.iter_mut()
.zip(rhou.iter_mut())
.zip(rhov.iter_mut())
.zip(e.iter_mut())
.map(|(((rho, rhou), rhov), e)| FieldValueMut { rho, rhou, rhov, e })
}
}
struct FieldValue {
rho: Float,
rhou: Float,
rhov: Float,
e: Float,
}
struct FieldValueMut<'a> {
rho: &'a mut Float,
rhou: &'a mut Float,
rhov: &'a mut Float,
e: &'a mut Float,
}
impl Field {
@@ -613,22 +656,13 @@ fn upwind_dissipation(
metrics: &Metrics,
tmp: (&mut Field, &mut Field),
) {
let n = y.nx() * y.ny();
let yview = y.0.view().into_shape((4, n)).unwrap();
let mut tmp0 = tmp.0 .0.view_mut().into_shape((4, n)).unwrap();
let mut tmp1 = tmp.1 .0.view_mut().into_shape((4, n)).unwrap();
for (((y, mut tmp0), mut tmp1), metric) in yview
.axis_iter(ndarray::Axis(1))
.zip(tmp0.axis_iter_mut(ndarray::Axis(1)))
.zip(tmp1.axis_iter_mut(ndarray::Axis(1)))
for (((FieldValue { rho, rhou, rhov, e }, tmp0), tmp1), metric) in y
.iter()
.zip(tmp.0.iter_mut())
.zip(tmp.1.iter_mut())
.zip(metrics.iter())
{
let rho = y[0];
assert!(rho > 0.0);
let rhou = y[1];
let rhov = y[2];
let e = y[3];
let u = rhou / rho;
let v = rhov / rho;
@@ -647,17 +681,17 @@ fn upwind_dissipation(
let alpha_u = uhat.abs() + c * hypot(metric.detj_dxi_dx, metric.detj_dxi_dy);
let alpha_v = vhat.abs() + c * hypot(metric.detj_deta_dx, metric.detj_deta_dy);
tmp0[0] = alpha_u * rho;
tmp1[0] = alpha_v * rho;
*tmp0.rho = alpha_u * rho;
*tmp1.rho = alpha_v * rho;
tmp0[1] = alpha_u * rhou;
tmp1[1] = alpha_v * rhou;
*tmp0.rhou = alpha_u * rhou;
*tmp1.rhou = alpha_v * rhou;
tmp0[2] = alpha_u * rhov;
tmp1[2] = alpha_v * rhov;
*tmp0.rhov = alpha_u * rhov;
*tmp1.rhov = alpha_v * rhov;
tmp0[3] = alpha_u * e;
tmp1[3] = alpha_v * e;
*tmp0.e = alpha_u * e;
*tmp1.e = alpha_v * e;
}
op.dissxi(tmp.0.rho(), k.0.rho_mut());