球体射线交叉点

Question

尝试使用C ++进行Ray-Sphere交叉程序。

我无法理解C ++的父函数。我试图将它与3个变量一起使用，但它并没有让我这么做。我怎么能这样做？

#include "Point3D.h"

Point3D::Point3D() :X{ 0 }, Y{ 0 }, Z{ 0 }{ }
Point3D::Point3D(double xP, double yP, double zP) :X{ xP }, Y{ yP }, Z{ zP } {}

Point3D::~Point3D(){
    this->X = 0;
    this->Y = 0;
    this->Z = 0;
}

double Point3D::getX(){
  return this->X;
}

double Point3D::getY(){
  return this->Y;
}

double Point3D::getZ(){
  return this->Z;
}

void Point3D::setX(double xP)
{
  this->X = xP;
}

void Point3D::setY(double yP)
{
  this->Y = yP;
}

void Point3D::setZ(double zP)
{
  this->Z = zP;
}

Point3D& Point3D::addVectors(const Point3D& vec){
  this->X += vec.X;
  this->Y += vec.Y;
  this->Z += vec.Z;
}

Point3D& Point3D::subtractVectors(const Point3D& vec){
  this->X -= vec.X;
  this->Y -= vec.Y;
  this->Z -= vec.Z;
}

double Point3D::multiplyVectors(const Point3D& vec){
  double val = (this->X *vec.X) + (this->Y *vec.Y) + (this->Z *vec.Z);
  return val;
}

double Point3D::squareVector(){
  double val = (this->X) *(this->X) + (this->Y) * (this->Y) + (this->Z) * (this->Z);
  return val;
}

Point3D operator+(const Point3D &val1, const Point3D &val2, const Point3D &val3){
    return Point3D(val1.X + val2.X + val3.X,  val1.Y + val2.Y + val3.Y, val1.Z + val2.Z + val3.Z);
}

Point3D operator-(const Point3D &val1, const Point3D &val2, const Point3D &val3){
    return Point3D(val1.X - val2.X - val3.X, val1.Y - val2.Y - val3.Y, val1.Z - val2.Z - val3.Z);
}

Point3D operator*(const Point3D &val1, const Point3D &val2, const Point3D &val3){
  return Point3D(val1.X * val2.X * val3.X, val1.Y * val2.Y * val3.Y, val1.Z * val2.Z * val3.Z);
}
Point3D operator/(const Point3D &val1, const Point3D &val2, const Point3D &val3){
  return Point3D(val1.X / val2.X / val3.X, val1.Y / val2.Y / val3.Y, val1.Z / val2.Z / val3.Z);
}

Point3D operator- (const Point3D &val){
    return Point3D( -val.X, -val.Y, -val.Z);
}


bool operator!(const Point3D &val){

    cout << "Friend function is called!!!" << endl;
    return ( val.X != 0.0 || val.Y != 0.0 || val.Z != 0.0);
}

bool Point3D::operator!(){

    return ( ((*this).X != 0) || ((*this).Y != 0) || ((*this).Z != 0));
}


Point3D& Point3D::operator++(){

    cout << "Calling prefix ......." << endl;
    X += 1;
    Y += 1;
  Z += 1;
    return (*this);
}

Point3D& Point3D::operator++(int){
    cout << "Calling postfix ......." << endl;
    Point3D temp = *this;
    X += 1;
    Y += 1;
  Z += 1;
    return temp;

}

istream& operator>>(istream& istr, Point3D& P){
    istr >> P.X >> P.Y >> P.Z;
    return istr;
}

ostream& operator<<(ostream& ostr, Point3D& P){
    ostr << P.X << " " << P.Y << " " << P.Z;
    return ostr;
}

Main.cpp的

#include <iostream>
#include "Point3D.h"
using std::istream; using std::ostream;
int main(){

    Point3D P1, P2, P3;

    cout << "Enter the first point: " << endl;
    cin >> P1;
    cout << endl;

    cout << "Enter the second point: " << endl;
    cin >> P2;
    cout << endl;

  cout << "Enter the third point: " << endl;
  cin >> P3;
  cout << endl;

    cout << "Point P3 is: " << !P3;
    cout << "Points are: " << P1 << " and " << P2 << " and " << P3 << endl;

    Point3D P4, P5, P6, P7, P8;

    cout << "Point P8 is: " << P8  << endl;

    P4 = P1 + P2 + P3;
    P5 = P1 - P2 - P3;
    P6 = P1*P2*P3;
    P7 = P1 / P2 / P3;

    Point3D P30 = operator-(P1);
    operator << (cout, P30) << endl;

    cout << (cout, P30) << endl;
    cout << "Point P4 is: " << P4 << endl;
    cout << "Point P5 is: " << P5 << endl;
    cout << "Point P6 is: " << P6 << endl;

    Point3D P9 = P8.operator++();
    cout << "Point P8 is: " << P8 << endl;
    cout << "Point P9 is: " << P9 << endl;
    Point3D P10 = P8++;
    cout << "Point P8 is: " << P8 << endl;
    cout << "Point P10 is: " << P10 << endl;


    if (operator!(P1))  cout << "I'm not equal!!\n";

    cout << endl;

    return 0;
}