Reading

Interpolate field value at physical coordinates (const overload)

Interpolate field value at physical coordinates (const overload)Const version of interpolate(). Returns a const reference to the field value. Use this when you don't need to modify the field value.

Template Parameters

T	Field value type
D	Dimensionality

Parameters

field	The discrete field to interpolate (const)
coordinates	Physical coordinates to interpolate at

Returns

Const reference to the field value at the nearest grid point

from const field

const pfc::DiscreteField<double, 3> field = create_field();
 
// Can read but not modify
const double& value = pfc::interpolate(field, {10.0, 20.0, 30.0});
std::cout << "Value: " << value << std::endl;
// value = 42.0;  // ❌ Won't compile (const)

Note

This overload is selected when field is const

All other behavior identical to mutable version

See also

interpolate(DiscreteField&, const std::array<double,D>&) mutable version