Mouse picking

[kvark]

Three.js employs a generic raycasting model for picking:
https://threejs.org/docs/#api/core/Raycaster

We could make it work with roughly the following API:

let raycaster = three::RayCaster::from_camera(mouse_coords, &cam);
for (name, world_transform, material) in raycaster.cast(&scene) {
  // do something
}

Clearly, we'd want the nodes to be named for this to be convenient.

[vitvakatu]

Maybe it's better to return NodeInfo rather than (name, world_transform, material)?

[alteous]

How would you feel about Mesh holding onto an Arc<Geometry>? This would be useful for mouse picking against geometry.

[alteous]

It might be overkill to be mouse picking on individual triangles. Perhaps we could have a Collider abstraction?

[alteous]

Maybe it's better to return NodeInfo rather than (name, world_transform, material)?

Also, how about returning some unique integer ID instead of a name?

[vitvakatu]

I would like to return smth like NodeInfo. I'm not sure user needs access to triangles, by the way.
name seems useless for me, I'd like to see node pointer instead.