Better face normals for mesh3d (take 2)

[etpinard]

resolves #1368 (at least it try to).

Take on #1423 including the changes from gl-vis/gl-mesh3d#8 in plotly.js.

Note that this PR does not attempt to resolve #1368 (comment).

By opening a PR, we (i.e. mostly @jackparmer ) hope to test out a few more mesh3d graphs with the commits of gl-vis/gl-mesh3d#8 - see gl-vis/gl-mesh3d#8 (comment)

[alexcjohnson]

@etpinard @dfcreative After playing with this for a while, I think @dfcreative's comment last year was actually 🎯

What is the chance that test images had wrong sign all the time due to rendering in Ubuntu?

When I load the Snowden mocks on my machine, both master and this branch look like the new baselines, so lets do this! (with a published version of gl-mesh3d)

We still have seriously broken lightposition - generally x is left (-) to right (+) and y is bottom (-) to top(+), but z has effects that defy easy categorization other than z=1 being "special", and sometimes x and y flip randomly and they don't seem to have the same scales, ie x=y does not put the light at 45 degrees... but that applies to both mesh3d and surface and isn't new here - I'll make a new issue for it.

[jackparmer]

And he said let there be light!

…

On Thu, Mar 15, 2018 at 7:18 PM, alexcjohnson ***@***.***> wrote: @etpinard <https://github.com/etpinard> @dfcreative <https://github.com/dfcreative> After playing with this for a while, I think @dfcreative <https://github.com/dfcreative>'s comment last year was actually 🎯 What is the chance that test images had wrong sign all the time due to rendering in Ubuntu? When I load the Snowden mocks on my machine, both master and this branch look like the new baselines, so lets do this! (with a published version of gl-mesh3d) We still have seriously broken lightposition - generally x is left (-) to right (+) and y is bottom (-) to top(+), but z has effects that defy easy categorization other than z=1 being "special", and sometimes x and y flip randomly and they don't seem to have the same scales, ie x=y does not put the light at 45 degrees... but that applies to both mesh3d and surface and isn't new here - I'll make a new issue for it. — You are receiving this because you were mentioned. Reply to this email directly, view it on GitHub <#2365 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABx4avIV5RIclpBz5R9r1RdA4KQxbQAPks5tevaqgaJpZM4SFzha> .

[etpinard]

Has anyone tested some of empet's creations?

[etpinard]

Merging this thing (cc @jackparmer )

Remaining lightposition issues can be tracked in #2477