Mouseover to make particles. Built with D3. I’ve written a slight newer version that creates particles continuously via d3.timer rather than on mouseover. So, check that out.
Last active
November 15, 2019 12:02
-
-
Save mbostock/1062544 to your computer and use it in GitHub Desktop.
OMG Particles!
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| license: gpl-3.0 |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| <!DOCTYPE html> | |
| <meta charset="utf-8"> | |
| <style> | |
| body { | |
| margin: 0; | |
| background: #222; | |
| min-width: 960px; | |
| } | |
| rect { | |
| fill: none; | |
| pointer-events: all; | |
| } | |
| circle { | |
| fill: none; | |
| stroke-width: 2.5px; | |
| } | |
| </style> | |
| <body> | |
| <script src="//d3js.org/d3.v3.min.js"></script> | |
| <script> | |
| var width = Math.max(960, innerWidth), | |
| height = Math.max(500, innerHeight); | |
| var i = 0; | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| svg.append("rect") | |
| .attr("width", width) | |
| .attr("height", height) | |
| .on("ontouchstart" in document ? "touchmove" : "mousemove", particle); | |
| function particle() { | |
| var m = d3.mouse(this); | |
| svg.insert("circle", "rect") | |
| .attr("cx", m[0]) | |
| .attr("cy", m[1]) | |
| .attr("r", 1e-6) | |
| .style("stroke", d3.hsl((i = (i + 1) % 360), 1, .5)) | |
| .style("stroke-opacity", 1) | |
| .transition() | |
| .duration(2000) | |
| .ease(Math.sqrt) | |
| .attr("r", 100) | |
| .style("stroke-opacity", 1e-6) | |
| .remove(); | |
| d3.event.preventDefault(); | |
| } | |
| </script> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Did you mean to use Math.min instead of Math.max for the width and height?