Re: [svgwg] SVG marker orientation at a 180° U-turn not well defined

A note about motion paths: the orientation at motion path vertices should not be halfway between directions. The orientation at a vertex is drawn only for one frame, when the motion path is sampled at the vertex position. Using a halfway value would cause undesirable flickering.

The [CSS Motion Paths](https://drafts.fxtf.org/motion-1/) spec was [recently changed](https://github.com/w3c/fxtf-drafts/issues/108) to define the orientation at sharp corners. The orientation of the preceding segment is used: "If the offset path is composed of multiple line segments, the orientation at the connection between the segments is the same as the direction of the previous segment."

Google Chrome already implements CSS motion paths like that.

So, you don't have to worry how Path Directionality affects motion paths.


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Received on Friday, 28 July 2017 10:20:15 UTC