829162 - Alcatraz 70s WebGL Demo has bad vertex position (Chrome also)

Status: RESOLVED INCOMPLETE

(Core :: Graphics: CanvasWebGL, defect)

Description

[Benoit Girard (:BenWa)]

Attachment: screenshot

The following page on my machine has vertex problems:
http://www.inka3d.com/demos/70s/

This happens in both Chrome nightly and chrome safari.

I'm running 10.8.2 with 'Graphics AMD Radeon HD 6750M 1024 MB' with mbp 15-inch, Early 2011 (MacBookPro8,2)

Comment 1

[Vladimir Vukicevic [:vlad] [:vladv] (needinfo me, slow to respond)]

Does it -not- happen in some browser?  I mean, it could be a bug in the app/demo...

Comment 2

[Kelsey Gilbert [:jgilbert]]

Seems to work in Win7 FF 19. Chrome aborts loading the page about three seconds in to the demo, post-loading. Seems to work in my trunk 21 debug trunk build as well, though with predictably terrible FPS.

Comment 3

[Kelsey Gilbert [:jgilbert]]

Seems to work on Win7 with native-gl, also.

I'll further note that Win7 Chrome doesn't seem to render properly before crashing, either.

Comment 4

[Benoit Girard (:BenWa)]

I'd likely a apple OGL driver issue.

Comment 5

[Benoit Girard (:BenWa)]

It also happens in Safari. I'm not sure how to enable WebGL in Opera but I don't think it will matter.

Comment 6

[Benoit Girard (:BenWa)]

Still an issue with 23.0a1 (2013-04-04) + Canary

Comment 7

[Jochen]

As the creator of Inka3D I reported this bug to ATI and they gave me some advice for a workaround. Then I exported the demo again to http://www.inka3d.com/demos/70s/ so now it should work. Please test it and leave a comment here or on the Inka3D Facebook page. The workaround is using only 4-vectors of bytes in the vertex format for e.g. storing a normal. ATI has problems when there are only 3-vectors of bytes, but they want to fix their driver soon.