How do i find center point on 3d curve?

Questions
1

CURVE

Hello! Can you help find a way to get the yellow center point?

default curve.geometry.boundingSphere.center gives me center where the red marker is

1 Like
2

Hi!
Have a look at the docs: three.js docs

Something like this:

let midPoint = new THREE.Vector3();
curve.getPointAt(0.5, midPoint);
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3

forget to say, that I’m using the THREE.Line to draw this
And Line doesn’t have this method

4

Then it’s better to provide an editable working live code example to demostrate what and how you do.

5

Based on your line data you can replicate a pure mathematical version of your line via THREE.Path and then use the method suggested by @prisoner849.

2 Likes
6

how could i represent it if Path is 2d?

7

working on it

8

I’ve assumed you curve lies in a conceptual 2D plane e.g. a XY plane.

If not, it’s correct that you can’t use THREE.Path. However, you can create an instance of THREE.CurvePath and use the add() method to add instances of THREE.LineCurve3.

2 Likes
9

I’ll try this way

11

Thank you! This way enable me to get the mid point as the prisoner said. Can’t mark 2 solution at once, but you both helped me. Many thanks!

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12

Hey @insuby, would you mind sharing your solution?