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@mbostock mbostock/.block forked from mbostock/.block
Last active Aug 30, 2017

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SVG Geometric Zooming
license: gpl-3.0
<!DOCTYPE html>
<meta charset="utf-8">
<svg width="960" height="500"></svg>
<script src="https://d3js.org/d3.v4.min.js"></script>
<script>
var svg = d3.select("svg"),
width = +svg.attr("width"),
height = +svg.attr("height");
var randomX = d3.randomNormal(width / 2, 80),
randomY = d3.randomNormal(height / 2, 80),
data = d3.range(2000).map(function() { return [randomX(), randomY()]; });
var g = svg.append("g");
var circle = g.selectAll("circle")
.data(data)
.enter().append("circle")
.attr("r", 2.5)
.attr("transform", function(d) { return "translate(" + d + ")"; });
svg.append("rect")
.attr("fill", "none")
.attr("pointer-events", "all")
.attr("width", width)
.attr("height", height)
.call(d3.zoom()
.scaleExtent([1, 8])
.on("zoom", zoom));
function zoom() {
g.attr("transform", d3.event.transform);
}
</script>
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