1
$\begingroup$

In one of the algorithms I encountered an formula to calculate a scalar number from 2 points. Given Point 1 has coordinates $(x1,y1)$ and Point 2 has coordinates $(x2, y2)$ the formula was following

$\sqrt{(y1-x1)^2 + (y2-x2)^2}$

If the $x1$ is equal to $y1$ and $x2$ is equal to $y2$ then the result is $0$. On the other hand the result grows when coordinates are far from the diagonal.

Does this formula has any name or does it serve any well known purpose e.g. in gaming?

$\endgroup$
  • $\begingroup$ Pythagorean theorem $\endgroup$ – caverac Jan 10 at 21:25
  • $\begingroup$ Nope. Check the coordinates.... Oh, and this has nothing to do with "scalar product." $\endgroup$ – David G. Stork Jan 10 at 21:26
  • $\begingroup$ @caverac But Pytagorean hypothenuse whould be $\sqrt{(x1-x2)^2+(y1-y2)^2}$ $\endgroup$ – nosalan Jan 10 at 21:36
  • $\begingroup$ You're right, I misread the variables. Are you sure this is the right expression? $\endgroup$ – caverac Jan 10 at 23:51
  • $\begingroup$ Some context for this expression would be helpful. $\endgroup$ – amd Jan 11 at 0:50

Your Answer

By clicking "Post Your Answer", you acknowledge that you have read our updated terms of service, privacy policy and cookie policy, and that your continued use of the website is subject to these policies.

Browse other questions tagged or ask your own question.