The ability to find the distance between 2 points in 3D space is a really important function I need to use time and again.
I found this website that is really helpful with clear explanations on the use of the formula.
From the webpage I learnt the formula for the distance d between points A (expressed as Ax, Ay, Az) and B (expressed as Bx, By, Bz), would be expressed as such:
d = √
I was going to use the distance function on an expression in Maya, so I had to write it with MEL commands:
vector $a = `xform -q -ws -a -rp "objA"`;
vector $b = `xform -q -ws -a -rp "objB"`;
// doing the additions and squaring first
$myDist = `pow ($a.x-$b.x) 2` + `pow ($a.y-$b.y) 2` + `pow ($a.z-$b.z) 2`;
// applying the square root
$myDist = `sqrt $myDist`;
I hope you it helps if you are looking for the same information.
I am writing this a few days after my post because I found a more efficient way to represent the formula.
Instead of using the back ticks "`" for the pow and sqrt, I found that in Maya expressions we can use the equivalent of these commands. They are pow( ) and sqrt( ).
So the shortened single-line expression would be:
$myDist = sqrt(pow(($a.x-$b.x), 2) + pow(($a.y-$b.y),2) + pow(($a.z-$b.z),2))