The avatar for @redblobgames
Amit Patel
I work on explorable explanations, gamedev tutorials, and gamedev tools.
Published
Edited
Jan 31, 2021
19 stars
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animationBefore = {
function mySvg(contents) {
// Note that this svg is 1x1. It is not a giant overlay.
// See http://simblob.blogspot.com/2016/10/outside-box.html
return svg`<svg width=1 height=1 style="overflow:visible;position:absolute;left:0;top:0;z-index:5">${contents}</svg>`;
}
// There's a cycle here: in order to build the SVG I need to know its
// position. But I can't know its position until I return it. And I can't
// return it until I build it. Checkmate. But no! @mbostock gave me this
// clever trick: yield the partial svg, grab its position, then yield the
// full svg. Haha!
let element = mySvg("");
yield element;
// Here's where I grab the positions of the other SVGs as well as myself,
// and then I can calculate the positions of the other SVGs relative to
// myself, and that lets me position elements so that they will sit on top
// of or in between the other SVGs on the page.
let fromRect = terrainBefore.getBoundingClientRect();
let toRect = distributionBefore.getBoundingClientRect();
let myRect = element.parentNode.getBoundingClientRect();
yield mySvg(svgAnimatedMarkers(sortedTerrain, fromRect, toRect, myRect));
}

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