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




6 years ago
5 years ago


(Reporter: BenWa, Unassigned)


Mac OS X

Firefox Tracking Flags

(Not tracked)


(Whiteboard: webgl-conformance, webgl-test-needed, URL)


(1 attachment)



6 years ago
Created attachment 700548 [details]

The following page on my machine has vertex problems:

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

6 years ago
I'd likely a apple OGL driver issue.

Comment 5

6 years ago
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

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

Comment 7

5 years ago
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 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.
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