I would like to build such geometry in three.js
How can I do it.
Please help me 
Here is an idea:
Start with a cylinder with three layers of vertices. Keep the upper two layers unchanged. Modify only the bottom layer of vertices – reposition them into the vertices of a square. That’s all. Here is how it looks like in wireframe and in solid mode:
I will leave the actual coding to you.
3 Likes
Thank you, great idea.
Could you please explain how I can change the position of vertices of the cylinder geometry?
If you have any sample code, please share me.
Thank you again, Pavel
@PavelBoytchev Very cool approach. Actually, this was my first thought too, to deform a cylinder.
But I went the way of merging of geometries (custom one and an open-ended cylinder)
@cory
To change vertices of a geometry, you can use .setXYZ() method of BufferAttribute.
2 Likes