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详见Github
https://github.com/lichking24...

Thanos Dust Effect

Effects Demo

As Thanos making a snap with the Infinite Gauntlet, half the heros vanish to dust. As using the time stone, people come back.

Details

The procedures:

  1. Click the Gauntlet button, and display animation to make a snap, and play audio file;
  2. Select half heros by random, the random method is to resort members array;

    arr.sort(function() {
      return 0.5 - Math.random();
    });
  3. Make selected item to dust

    • 3.1 use html2canvas library to convert dom to a canvas image
    • 3.2 split the canvas images into many pieces by pixel, function generateFrames()
    • 3.3 create a container which has the same size and position as the converted dom
    • 3.4 appendChild to the container with the pieces
    • 3.5 rotate random degrees and translate random pixel for each piece, which shows the dust animation
    • 3.6 set converted dom item to be invisible and finish the SNAP action
  4. Reverse time to bring heros back by adjusting the visibility of converted dom items

FAQ

Why use a nodejs express server?

A static html file will show errors with "Unable to get image data from canvas because the canvas has been tainted by cross-origin data", even if I set allowTaint to be true.


LichKing24
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