sequential-integration 1.0.2

Lightweight library for sequential integration
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45

use fehler::throws;

use super::utils;
use crate::{
    engine::{
        helper_equation_traits::EquationOfOneVariable,
        quadrature::{FinalizeCalculation, GetQuadratureRange},
        CalculationResult,
    },
    errors::Error,
};

pub struct FirstIntegrator;

impl FirstIntegrator {
    #[throws]
    pub fn integrate<E: EquationOfOneVariable, G: GetQuadratureRange + FinalizeCalculation>(
        a: f64,
        b: f64,
        h: f64,
        equation: &E,
        quadrature: &G,
    ) -> f64 {
        let borders_config = utils::BoundsConfigurator::configurate(a, b)?;

        let mut result = CalculationResult::new();
        let mut range = if let Some(range) = G::get_range_generator(borders_config.bounds, h)? {
            range
        } else {
            return result.common;
        };

        loop {
            let step = range.next()?;
            result +=
                equation.calculate(step, borders_config.bounds)? * borders_config.direction_coeff;

            if step.is_last() {
                break;
            }
        }

        quadrature.finalize(result)?
    }
}