Separating an x and y value in list

MIT App Inventor Help
1

hey, this seems pretty easy to do but I'm still new to MIT, anyone know how to separate a point's x and y values in a list? Each point is an index so I'm unsure how to split it. Thanks

2

Show your relevant blocks, what you have tried...

3

image
image568×610 33.9 KB

4

I'm using posenet right now but each bone index is a point and 2 make the line, pretty much I'm trying to make it to where each bone will have a angle between them but to compute the angle I need points on the ends of each bone. I then need to seperate these points into x and y values to get slopes then arctans.

5

I have not used posenet but:

image

not sure how this will draw a line ?

Why not store the x and y values together in a list:

[[x1,y1],[x2,y2]...]

6

I'm unsure how it works but I know that part does work without all the stuff underneath it. And when I return the bone its a point value. I realize that splitting the list items in that current code would only split points but not their x or y's.

7

So your hierarchy is:

  • skeleton
    • bone
      • point1
        • x
        • y
      • point2
        • x
        • y

This is a list of lists of lists.

8

hmm ok I think i may be able to manipulate the points before it becomes a list of list of lists
I'll keep working on it thanks

9

By the way, I would avoid using that slice list block.

It does not do what you think it does.