Examples: tonemapping add backgroundIntensity gui

[vis-prime]

Description

Since tonemapping example already has scene.backgroundBlurriness , adding scene.backgroundIntensity slider also

[Mugen87]

https://rawcdn.githack.com/vis-prime/three.js/tonemapping_example_gui_update/examples/webgl_tonemapping.html

[Mugen87]

Maybe we should make two folders "tone mapping" and "background". The tone mapping type and exposure are placed in the first folder, blurriness and intensity in the second one. That should make the GUI more clear.

Folders are done like so:

https://github.com/mrdoob/three.js/blob/edefdc237b2528b9668fb873a1c06cb835840303/examples/webgl_postprocessing_unreal_bloom.html#L127C16-L127C22

[vis-prime]

sure !, was thinking the same

will add it as
toneMapping and exposure under a tone mapping folder
&
blurriness and intensity under a background folder

some extra logic was there to remove exposure slider when tonemapping is null, just passing the tonemappingFolder to that function

[vis-prime]

ummm... why isn't the rawcdn.githack not showing the updated version ?

[Mugen87]

It usually takes a while until the link refers to the latest commit. In the meanwhile, you can test the changes by using the commit hash in the URL: https://rawcdn.githack.com/vis-prime/three.js/8568419d2e9858c7e4e113a1366c641804bc1f11/examples/webgl_tonemapping.html