# Getting Midpoint using array(?)

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 22/06/2006 at 05:08, xxxxxxxx wrote:

User Information:
Cinema 4D Version:   9.1+
Platform:   Windows  ;   Mac OSX  ;
Language(s) :   C.O.F.F.E.E  ;

---------
I need some help understanding using arrays.
What I'd like to do is using the selected points in a PointSelectionTag.
Add those points positions and divide by the amount of points to get a mid position.

I come as far as the code below, I get the indexes and corresponding positions,but cannot get the grips of using an array to store and calculate them.
Given that the result allready is an array, as it looks, I might be on the wrong track, maybe.....

I -assume- I'll have to use an array for this, if not is there a better way?

Cheers
Lennart

``````main(doc,op)
{

if(link->IsInstanceOf(Tpointselection) !=FALSE) // If it is a PointSelectionTag run
{
println("YES"); // It´s a pointselectionTag
}
else
{
println("NO");
return;
}
// Get the selected points , index and position
var pointsel = link->GetSelection(); // get whats stored in the Tag
var count = link->GetObject()->GetPointCount(); // get the amount of points in the object
var i=0;
var found=0;
for (i=0; i< count; i++)
{
if(pointsel->IsSelected(i))
{
found++;
println(link->GetObject()->GetPoint(i)); // Prints the selected points position(s) as an array
println(i); // print the indexes of the points
println(found); // prints the amount of selected points

/*
Here I need to add all selected points positions and divide by found to get the avarage position
*/
}
}

}
``````

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 22/06/2006 at 09:03, xxxxxxxx wrote:

not sure why you want an array for this, but simply use a vector for this.

Just before your for loop set

var p = 0;

p += op->GetPoint(i);

then right after your loop, simply divide the sum by your variable "found".

p /= found;

that´s it. Or did you want to do anything else?

Samir

THE POST BELOW IS MORE THAN 5 YEARS OLD. RELATED SUPPORT INFORMATION MIGHT BE OUTDATED OR DEPRECATED

On 22/06/2006 at 15:51, xxxxxxxx wrote:

No, this is very much what I'm after, thanks!
I just have to init the positions as vectors as well and it should be fine:)

Cheers
Lennart