Distance between points in the screen

[Sergio]

I need to create a methiod to click in two points of the scene and getting the distance between then. Do you know any demo or code for this ? Thanks in advance

[Jerome.D (BeanzMaster)]

Hi Sergio you can take a look at the
\Samples\collisions\meshhit for selecting points
Samples\collisions\RayBox for intersecting
and for calculate distance you have this :

{ Calculates distance between two vectors.
   ie. sqrt(sqr(v1[x]-v2[x])+...) }
function VectorDistance(const v1, v2 : TAffineVector): Single; overload;
{ Calculates distance between two vectors.
   ie. sqrt(sqr(v1[x]-v2[x])+...) (w component ignored) }
function VectorDistance(const v1, v2 : TVector): Single; overload;

{ Calculates the "Norm 2" between two vectors.
   ie. sqr(v1[x]-v2[x])+... }
function VectorDistance2(const v1, v2 : TAffineVector): Single; overload;
{ Calculates the "Norm 2" between two vectors.
   ie. sqr(v1[x]-v2[x])+... (w component ignored) }
function VectorDistance2(const v1, v2 : TVector): Single; overload; 

in GLVectorGeometry.Pas and some others useful functions :)

You have also 2 or 3 samples in GLSAsm repo there can help you but not rememeber what they are.

(ouch not sur it's a good english sentence, sorry )

[Sergio]

Thanks Jerome. Reading your text I remebered something . Click the screen >>> Ponit to Vector and then VectorDistance / Vector Subtract