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Issue
238573002:
Web Animations: Allow timing inputs outside the range [0, 1] (Closed)
DescriptionWeb Animations: Allow timing function inputs outside the range [0, 1]
FOR LINEAR TIMING FUNCTIONS
the timing function is naturally extended so that output continues to equal input
FOR STEP FUNCTIONS
the step is clamped to the range [0, 1]
FOR BEZIERS
End-point gradients are used to calculate timing function results outside the range [0, 1].
There are three possibilities for the gradient at each end:
(1) the closest control point is not horizontally coincident
with regard to (0, 0) or (1, 1). In this case the line
between the end point and the control point is tangent to
the bezier at the end point.
(2) the closest control point is coincident with the end
point. In this case the line between the end point and
the far control point is tangent to the bezier at the end
point.
(3) the closest control point is horizontally coincident with
the end point, but vertically distinct. In this case the
gradient at the end point is Infinite. However, this
causes issues when interpolating. As a result, we break
down to a simple case of 0 gradient under these
conditions.
Committed: https://src.chromium.org/viewvc/blink?view=rev&revision=172821
Patch Set 1 #Patch Set 2 : #
Total comments: 8
Patch Set 3 : #
Messages
Total messages: 13 (0 generated)
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