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pcwalton's profile
Patrick Walton
Patrick Walton
Patrick Walton
@pcwalton

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Patrick Walton

@pcwalton

Research engineer at Mozilla

San Francisco, CA
pcwalton.github.io
Joined November 2009

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    Patrick Walton‏ @pcwalton 26 Mar 2018
    • Report Tweet
    • Report NetzDG Violation

    The WebGL version of Google Maps overdraws like crazy, which is why it’s slow. That depth buffer is your friend, folks! Use it!

    8:53 PM - 26 Mar 2018 from Civic Center, San Francisco
    • 3 Retweets
    • 36 Likes
    • Brett Camper Mathias Wahlin Tristan Hume chena Anti- Josh Carpenter Mike Penick Thomas Daede 𝓂𝒿𝓇 ∋ ℝ
    2 replies 3 retweets 36 likes
      1. New conversation
      2. Patrick Walton‏ @pcwalton 26 Mar 2018
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        Not sold on Google Maps’ use of signed distance fields for text either. It makes small text blurry, presumably because it’s downsampled. SDF only really helps magnification, which they don’t do much.

        1 reply 0 retweets 8 likes
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      3. Patrick Walton‏ @pcwalton 26 Mar 2018
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        Almost every Google Maps shader has a discard in it. I don’t see why this is needed. Not that they’re getting much benefit from early Z anyway since they draw back to front :(

        3 replies 0 retweets 8 likes
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      4. Patrick Walton‏ @pcwalton 26 Mar 2018
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        The way Google Maps roads are rendered seems mostly fine, though the AA is a bit wrong (it’s a linear distance ramp…better than smoothstep anyway). Could be improved with a depth prepass perhaps…Pathfinder benefits from that a lot.

        0 replies 0 retweets 6 likes
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      5. End of conversation
      1. Jarred Nicholls‏ @jarrednicholls 27 Mar 2018
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        Replying to @pcwalton

        Have you considered writing a book on modern graphics processing and reference the journey of Pathfinder and pull examples from it?

        0 replies 0 retweets 5 likes
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