Deleting Points from a Primitive Wrangle

[Mdonovan]

 

Hi Guys,

I am trying to learn more VEX and I am definitely in need of some assistance here. This is very basic. 

I have stacked rows of curves that have 3 points each. 

I want to delete from 0 to 2 pts per curve randomly. 

Curently I am assigning an @del_qty to each primitive that will tell me how many point on that primitive I am to delete. 

I dont know how to delete the points using a wrangle since my @del_qty lives on the primitive. 

Below is an imag that show what I am attempting to do (the red x's are deleted points). .

 

Edited May 2, 2020 by Mdonovan
bottom image does not represent data in spreadsheet.

[Mdonovan]

Here is another image kind of showing my progress ....

What I want to do based on this data is randomly delete:

1 point on prim1

2 points on prim2

1 point on prim5

1 point on prim6

1 point on prim9

I underlined some points in the return value from primpoints just to illlustrate possible points to delete.

 

Edited May 2, 2020 by Mdonovan

[anim]

you can use removepoint() function to delete any input point you want

Edited May 3, 2020 by anim

[Mdonovan]

Maybe this image will help ... 

I think I need to iterate over each primitive and then get the min and max value of a static id to delete the points.

[Aizatulin]

Hi,

I would go with two steps:

• get the number of points to be deleted for each prim (already done)
• use this number to calculate a random selection of points for each prim (the selection can be obtained using the primpoints() function to get all points from each prim)

 

 

random_selection.hipnc

Edited May 3, 2020 by Aizatulin