3D vector distance calculation
July 24th, 2009
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Recently I decided to revisit Vectors. Being something that while I covered in A-Level Physics, but never really grasped beyond the basics.
So in the process of messing around with vectors, I wrote a small 3D vector distance calculator in PHP, which I then proceeded to port to C++ for fun. Code is below, and I’ll release the EXE if someone wants it, not really useful unless you want a quick(ish) way of getting distances I suppose.
Enjoy:
< ?php
function distance($a, $b)
{
return sqrt(pow($a[0] - $b[0], 2) + pow($a[1] - $b[1], 2) + pow($a[2] - $b[2], 2));
}
$a = array(-1, 0, 6);
$b = array(5, 2, 10);
echo distance($a, $b);
?>
#include <iostream>
#include <math .h>
using namespace std;
float distance(float &Bx, float &By, float &Bz)
{
float Ax = 0.0f, Ay = 0.0f, Az = 0.0f;
return sqrt(pow(Ax - Bx, 2) + pow(Ay - By, 2) + pow(Az - Bz, 2));
}
int main()
{
float x, y, z;
bool loop;
do
{
cout < < "Enter vector:" << endl << "X: ";
cin >> x;
cout < < "Y: ";
cin >> y;
cout < < "Z: ";
cin >> z;
cout < < "Result: " << distance(x, y, z) << endl << "Again? 1/0: ";
cin >> loop;
} while(loop == true);
return 0;
}
Download: EXE ~10 KiB