A first attempt at panning and zooming with Orthographic projection. See also Orthographic Zoom II.
Uses world-110m geographic shapes from TOPOJSON World Atlas.
Inspired by
forked from curran's block: Orthographic Zoom I
Last active
October 30, 2017 19:08
-
-
Save apratt2003/be9acb2fd1f8254befd503bd70801bd3 to your computer and use it in GitHub Desktop.
Orthographic Globe
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> | |
| <head> | |
| <meta charset="utf-8"> | |
| <script src="https://d3js.org/d3.v4.min.js"></script> | |
| <script src="https://d3js.org/topojson.v1.min.js"></script> | |
| </head> | |
| <body> | |
| <svg width="960" height="500"></svg> | |
| <script> | |
| const svg = d3.select('svg'); | |
| const path = svg.append('path'); | |
| const projection = d3.geoOrthographic(); | |
| const initialScale = projection.scale(); | |
| const geoPath = d3.geoPath().projection(projection); | |
| const sensitivity = 58; | |
| d3.json('world-110m.json', (error, world) => { | |
| const land = topojson.feature(world, world.objects.land); | |
| const render = () => path.attr('d', geoPath(land)); | |
| render(); | |
| svg | |
| .call(d3.drag().on('drag', () => { | |
| const rotate = projection.rotate(); | |
| const k = sensitivity / projection.scale(); | |
| projection.rotate([ | |
| rotate[0] + d3.event.dx * k, | |
| rotate[1] - d3.event.dy * k | |
| ]) | |
| render(); | |
| })) | |
| .call(d3.zoom().on('zoom', () => { | |
| projection.scale(initialScale * d3.event.transform.k); | |
| render(); | |
| })); | |
| }); | |
| </script> | |
| </body> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment