Oh I see "Fisheye Lens" is a good demo, "Edge Filter Lens" is demo I mentioned. Now I realized the problem is scale ratio is still a bit small for me, not performance issue. I took a look at "scaleRBy" and I have thought that is the ratio but it does not. Great job!
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Try the demo here:
The gif in this article looks slow due to the compression.
Oh I see "Fisheye Lens" is a good demo, "Edge Filter Lens" is demo I mentioned. Now I realized the problem is scale ratio is still a bit small for me, not performance issue. I took a look at "scaleRBy" and I have thought that is the ratio but it does not. Great job!