[Webkit-unassigned] [Bug 52700] Transition from perspective(500px) to 'none' is probably wrong

[bugzilla-daemon at webkit.org]

https://bugs.webkit.org/show_bug.cgi?id=52700





--- Comment #3 from Chris Marrin <cmarrin at apple.com>  2011-01-19 11:50:26 PST ---
Simon, do you see bad behavior? It will interpolate (nonlinearly) from 500 down to the identity value of 1, which is probably wrong. We might have to change the if (blendToIdentity) case. 

Can you post a test case?

It might be better to have the blendToIdentity case go through the same decompose/compose/decompose operation as the normal case, just using an identity matrix for the 'to' matrix. We can look at the values returned. But I think that might give you the right effect.

Thinking back about it, I originally did just linearly interpolate the from and to values. The result was wrong, so I changed it to what we have today. I think I didn't take the identity case into account when I made that change.

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