Constant.cpp

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/*
 * Constant.cpp
 *
 *  Created on: Jan 9, 2020
 *      Author: Nikhil
 */
 
#include "Constant.h"
#include "typedef.h"
 
Constant::Constant(){}
 
Constant::~Constant(){}
 
double Constant::operator()(const double& t) const
{
    // Constant weighting function
    if (t < -1.0 - epsilon || t > 1.0 + epsilon)
    {
        return 0.0;
    } 
    else if ((t >= -1.0 - epsilon && t <= -1.0 + epsilon) || (t <= 1.0 + epsilon && t >= 1.0 - epsilon))
    {
        return 0.5;
    } 
    else
    {
        return 1.0;
    }
 
}
double Constant::integral() const
{
    return 2.0;
}
 
double Constant::integrate(const Vector3d& vec1_pull_seg, const Vector3d& vec2_pull_seg) const
{
    double result = 1.0;
    Vector3d vec_mid;
    vec_mid = (vec1_pull_seg + vec2_pull_seg) / 2.0;
 
    for (int i = 0; i <= 2; i++)
    {
        if (vec_mid(i) < -1.0 - epsilon || vec_mid(i) > 1.0 + epsilon)
        {
            return 0.0;
        } 
        else if ((vec_mid(i) >= -1.0 - epsilon && vec_mid(i) <= -1.0 + epsilon) || (vec_mid(i) <= 1.0 + epsilon && vec_mid(i) >= 1.0 - epsilon))
        {
            result = result * 0.5;
        } 
        else
        {
            result = result * 1.0;
        }
    }
 
    return result;
}