Polygon-wise billboarding: How to billboard lots of object?

Questions
1

Hi,

It is possible to make polygon-wise billboarding effect in three.js?

Three.js provides sufficient utilities for naive billboarding using quaternion.

plane.quaternion.copy( camera.quaternion );

Now, I want to draw a lot of images. To make it efficient, I use one geometry and a lot of polygons where fractions of atlas come in (Douglras’ codepen).

In this case, to realize a billboarding affect, quaternion is no longer available because each “polygons” needs to rotate instead of “geometry”. It is possible to make polygon-wise billboarding effect in three.js?

I come up with some ideas that modifies vertices’ position of each polygons in vertex shader, but can’t figure out how.

Thank you.

  • vertex: a coordinate in a space.
  • face: vertices.
  • polygon: faces.
  • geometry: polygons.
2

I’m not sure this phrasing makes sense. Can you please elaborate a bit what you mean?

If you are going to use instanced rendering, you will find an answer for your problem right here: InstanceGeometry always facing camera

1 Like
3

this seems helpful thanks!