bempp 0.2.0

Boundary element method library.
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//! Single layer integrand
use crate::assembly::common::RlstArray;
use crate::traits::{CellGeometry, PotentialIntegrand};
use rlst::{RlstScalar, UnsafeRandomAccessByRef};

/// Integrand for a single layer potential operator
pub struct SingleLayerPotentialIntegrand<T: RlstScalar> {
    _t: std::marker::PhantomData<T>,
}

impl<T: RlstScalar> SingleLayerPotentialIntegrand<T> {
    /// Create new
    pub fn new() -> Self {
        Self {
            _t: std::marker::PhantomData,
        }
    }
}

unsafe impl<T: RlstScalar> PotentialIntegrand for SingleLayerPotentialIntegrand<T> {
    type T = T;

    fn evaluate(
        &self,
        table: &RlstArray<T, 4>,
        point_index: usize,
        eval_index: usize,
        basis_index: usize,
        k: &RlstArray<T, 3>,
        _geometry: &impl CellGeometry<T = T::Real>,
    ) -> T {
        unsafe {
            *k.get_unchecked([0, point_index, eval_index])
                * *table.get_unchecked([0, point_index, basis_index, 0])
        }
    }
}

impl<T: RlstScalar> Default for SingleLayerPotentialIntegrand<T> {
    fn default() -> Self {
        Self::new()
    }
}