How to make part that fills in points

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#1
  1. What do you want to achieve?
    I am trying to get a polygon to form in the middle of points
  2. What is the issue?
    image
    image
    I have no Idea how to approach this. I have looked at other solutions but I cant understand them :expressionless:
    Thanks for any help!
#2

Use gap fill by stravant it’s an easy solution

1 Like
#3

It needs to be done in a live server on the fly

#4

Well you can look into live CSG to make a cutout shape that fills the hole.

#5

I was thinking about CSG but How would I cut it out, Its for making roofs on buildings

#6

Use Gap fill the plugin, it fills in gaps like it says in the title, and it would work how you would like it.

1 Like
#7

But this has to work in a live server on the fly

#8

Hmm, like with a script? Or something else?

If it is with a script, it would be pretty hard…

Most of the time you can’t make those shapes without unions or meshes.

#9

However, you could just change the transparency of the parts, and just have the parts already there and ready.

#10

You see, Im using a system with OSM mapping data, I am working on roof buildings. So I couldnt plan ahead of time.

#11

Yeah, good luck, lol, that is above my expertise.

#12

Thanks for the help! :smiley: :+1:t2: :+1:t2:

#13

CSG can be done at runtime now, if I’m not mistaken.

You’d cut a hole in a part by using a cylinder, CFraming it inside the part you want to cut a hole in at the position and orientation the hole is supposed to be, Negating the cylinder, then unioning the part and the negated cylinder.

Hope this helps.

#14

I’m not looking to put a hole in the roof, I’m trying to create a roof! but thanks for the help!

#15

Uh, you could create a roof by starting off with a block and then cutting off chunks of it using Negated parts until it resembles a roof.

If you have a brick and you want it to resemble a triangle, what do you do to the brick?

#16

So the part is in the Blue and we negate with the red?
image

#17

This is how it works:

image
image796×597 4.52 KB

Mind you, your Negated part doesn’t have to be a circle. You can Negate literally any geometry.

#18

Just for a non-CSG solution, can the polygon be concave? Does it have an arbitrary number of points?

#19

I think a non-CSG solution is the best here, yes the polygon can be concave and It does not have a arbitrary amount of points as it is simulating real life buildings.

#20

There might be a module out there for this, but you’re looking for polygon triangulation. That wiki page has a few methods listed, you could pick one.

Or, simplify the problem, so you don’t have to :slight_smile:

edit: here is an implementation of the ear clipping method (O(n^2)) in lua 5.1