/
mainhoobo.cpp
158 lines (123 loc) · 2.76 KB
/
mainhoobo.cpp
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/*
작성자 : 이은찬
*/
#include <stdio.h>
#include <iostream>
#include <cmath>
#define G 1
class Pos { // 위치 클래
double x;
double y;
double z;
public:
double getX(void) {
return x;
}
void setX(double x) {
this->x = x;
}
double getY(void) {
return y;
}
void setY(double y) {
this->y = y;
}
double getZ(void) {
return z;
}
void setZ(double z) {
this->z = z;
}
};
class Vec { // 속도벡터 클래스
public:
double x;
double y;
double z;
double getX(void) {
return x;
}
void setX(double x) {
this->x = x;
}
double getY(void) {
return y;
}
void setY(double y) {
this->y = y;
}
double getZ(void) {
return z;
}
void setZ(double z) {
this->z = z;
}
};
class Planet { // 행성 클래스
public:
Pos pos;스 // 위치
Vec vel; // 속도
Vec acc; // 가속도
double m; // 질량
double r; // 반지름
public:
Planet(void) {
pos.setX(0);
pos.setY(0);
pos.setZ(0);
vel.setX(0);
vel.setY(0);
vel.setZ(0);
this->m = 0;
}
Planet(double x, double y, double z, double vx, double vy, double vz, double m, double r) {
pos.setX(x);
pos.setY(y);
pos.setZ(z);
vel.setX(vx);
vel.setY(vy);
vel.setZ(vz);
this->m = m;
this->r = r;
}
};
void calculateAcc(Planet p1, Planet p2) { // 가속도 계산 함수
double x, y, z;
double r_squared;
x = p2.pos.x - p1.pos.x;
y = p2.pos.y - p1.pos.y;
z = p2.pos.z - p1.pos.z;
r_squared = x * x + y * y + z * z;
gp1m = G * p1.m;
gp2m = G * p2.m;
r_cubed = r_squared * sqrt(r_squared);
p1.acc.x = gp2m / r_cubed * x;
p1.acc.y = gp2m / r_cubed * y;
p1.acc.z = gp2m / r_cubed * z;
p2.acc.x = gp1m / r_cubed * -x;
p2.acc.y = gp1m / r_cubed * -y;
p2.acc.z = gp1m / r_cubed * -z;
}
void render(double dT, Planet p) // dT만큼의 시간을 지속시킴
{
p.vel.x = p.acc.x * dT;
p.vel.y = p.acc.y * dT;
p.vel.z = p.acc.z * dT;
p.pos.x = p.vel.x * dT;
p.pos.y = p.vel.y * dT;
p.pos.z = p.vel.z * dT;
}
int main()
{
double dT;
Planet p1(20, 20, 20, 1, 1, 1, 5, 2);
Planet p2(-20, -20, -20, 1, -1, 1, 30, 3);
Planet p3(10, 10, 10, -3, 5, 5, 70, 4);
calculateAcc(p1, p2);
calculateAcc(p1, p3);
calculateAcc(p2, p3);
render(dT, p1);
render(dT, p2);
render(dT, p3);
return 0;
}