add EXRLoader example

[richardmonette]

Adds a basic EXRLoader. Can read the header and uncompressed data.

I've added an example based of https://github.com/mrdoob/three.js/blob/dev/examples/webgl_materials_texture_hdr.html

I'd like to follow this up with better support of EXR feature, in particular PIZ compression.

related: #10652

cc @mrdoob

[WestLangley]

On MacOS, Chrome is claiming the texture is NPOT ( 1023 x 511 to be exact ).

Also, the tone mapping is rendering way too dark. May be related.

Errors are thrown with Safari and the image is not rendered.

[richardmonette]

@WestLangley thank you for your feedback, I believe my latest commit addresses the NPOT issues.

[WestLangley]

Yes, the issues I mentioned above appear to be resolved. Thanks.

[Mugen87]

@richardmonette Can you please add the new example to examples/files.js? Otherwise it won't appear in the navigation panel.

[mrdoob]

@richardmonette Can you please add the new example to examples/files.js?

I'll do that.

[mrdoob]

Many thanks!

[WestLangley]

@mrdoob @Mugen87 FYI, I deleted the live link I added above; the link will break anyway when the OP deletes the topic branch. I think deleting the link is the best practice.

[mrdoob]

@mrdoob @Mugen87 FYI, I deleted the live link I added above; the link will break anyway when the OP deletes the topic branch. I think deleting the link is the best practice.

I don't have strong feelings about this yet. If there were people complaining about broken links...

[WestLangley]

I think the addition of a live link, which used to be available via threejsworker, is a nice convenience for the reader. That is why I added it. It is of no value, however, once it is broken.

[mrdoob]

Maybe it's a wording issue? "Ephemeral test link" 😁

[WestLangley]

"Ephemeral test link"

:-)

Yes. I have been adding an "ephemeral test link" in a separate comment so it can be removed when it becomes obsolete. @Mugen87 has been helpful in this regard, too.

[jxarco]

@richardmonette how about following the EXRLoader with the parsing of ZIP compression exr files?

And Is the parsing of PIZ compression exr files working?

Many thanks!

[richardmonette]

Parsing compressed EXR files is significantly more complex than uncompressed.

I have, however, been working on upgrading the implementation to parse PIZ compressed files, as these seem to be the most common, and hope to have something for review in the near future.

[richardmonette]

@jxarco I've put together an initial implementation of the PIZ wavelet decompression #13346