Skeletal demo for d3.geoVoronoi
by Philippe Rivière.
Last active
August 28, 2019 14:45
-
-
Save Fil/79b9f17979c4070dee3cbba1c5283502 to your computer and use it in GitHub Desktop.
geoVoronoi circumcircles
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: mit |
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> 0 | |
| #sphere { | |
| fill: #ccc; | |
| stroke: #444; | |
| stroke-width: 2; | |
| } | |
| .triangles { | |
| stroke: none; /* we do their stroke with .links, allowing Urquhart variant */ | |
| } | |
| .links { | |
| stroke: white; | |
| stroke-width: 2; | |
| fill: none; | |
| } | |
| .links .secondary { | |
| stroke-width: .5; | |
| stroke-dasharray: 3 1; | |
| } | |
| .sites { | |
| stroke: black; | |
| fill: white; | |
| } | |
| .circum { | |
| stroke: white; | |
| stroke-width: 2; | |
| fill: rgba(255,255,255,0.5); | |
| pointer-events: none; | |
| } | |
| .circum.ray { | |
| stroke-dasharray: 1 1; | |
| fill: none; | |
| } | |
| </style> | |
| <svg width="960" height="600"></svg> | |
| <script src="https://d3js.org/d3.v5.min.js"></script> | |
| <script src="https://unpkg.com/d3-delaunay@5"></script> | |
| <script src="https://unpkg.com/d3-geo-voronoi@1.5"></script> | |
| <script> | |
| var points = { | |
| type: "FeatureCollection", | |
| features: d3.range(100).map(function() { | |
| return { | |
| type: "Point", | |
| coordinates: [ 360 * Math.random(), 90 * (Math.random() - Math.random()) ] | |
| } | |
| }) | |
| } | |
| var v = d3.geoVoronoi()(points); | |
| var projection = d3.geoEqualEarth(), | |
| path = d3.geoPath().projection(projection); | |
| var svg = d3.select("svg"); | |
| svg.append('path') | |
| .attr('id', 'sphere') | |
| .datum({ type: "Sphere" }) | |
| .attr('d', path); | |
| svg.append('g') | |
| .attr('class', 'triangles') | |
| .selectAll('path') | |
| .data(v.triangles().features) | |
| .enter() | |
| .append('path') | |
| .attr('d', path) | |
| .attr('fill', function() { return d3.hsl(Math.random()*360, .8, .65); }) | |
| // .attr('fill', 'rgba(255,255,255,0.01)'); | |
| ; | |
| svg.append('g') | |
| .attr('class', 'links') | |
| .selectAll('path') | |
| .data(v.links().features) | |
| .enter() | |
| .append('path') | |
| .classed('secondary', function(d) { | |
| return !d.properties.urquhart; | |
| }) | |
| .attr('d', path); | |
| svg.selectAll('.triangles path') | |
| .on('mouseover', function(d){ | |
| console.warn({d}) | |
| var radius = 180 / Math.PI * d3.geoLength({ | |
| type: "LineString", | |
| coordinates: [ d.properties.circumcenter, d.geometry.coordinates[0][0] ] | |
| }); | |
| var circle = d3.geoCircle() | |
| .center(d.properties.circumcenter); | |
| svg.append('path') | |
| .attr('class', 'circum circle') | |
| .datum(circle.radius(radius)()) | |
| .attr('d', path); | |
| svg.selectAll('.ray') | |
| .data(d.geometry.coordinates[0].slice(0,3).map(function(vertex) { | |
| return { | |
| type: "LineString", | |
| coordinates: [d.properties.circumcenter, vertex] | |
| }; | |
| })) | |
| .enter() | |
| .append('path') | |
| .attr('class', 'circum ray') | |
| .attr('d', path); | |
| }) | |
| .on('mouseout', function(d){ | |
| svg.selectAll('.circum') | |
| .remove(); | |
| }) | |
| svg.append('g') | |
| .attr('class', 'sites') | |
| .selectAll('path') | |
| .data(points.features) | |
| .enter() | |
| .append('path') | |
| .attr('d', path); | |
| // gentle animation | |
| if (false) d3.interval(function(elapsed) { | |
| projection.rotate([ elapsed / 150, 0 ]); | |
| svg.selectAll('path') | |
| .attr('d', path); | |
| }, 50); | |
| </script> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment