Use Geometric.js to calculate a polygon's bounds.
Last active
February 10, 2019 21:26
-
-
Save HarryStevens/2b4c07abe73b9ea5843547d4f47086fe to your computer and use it in GitHub Desktop.
Polygon Bounds
This file contains hidden or 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 hidden or 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> | |
| <html> | |
| <head> | |
| <style> | |
| body { | |
| margin: 0; | |
| } | |
| .polygon { | |
| fill: steelblue; | |
| } | |
| .bounds { | |
| fill: none; | |
| stroke: black; | |
| stroke-width: 2px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <script src="https://d3js.org/d3.v5.min.js"></script> | |
| <script src="https://unpkg.com/[email protected]/build/geometric.min.js"></script> | |
| <script> | |
| var width = window.innerWidth, | |
| height = window.innerHeight, | |
| center = [width / 2, height / 2], | |
| vertices = [ | |
| [center[0] - 100, center[1] - 100], | |
| [center[0], center[1] - 130], | |
| [center[0] + 100, center[1] - 100], | |
| [center[0] + 150, center[1]], | |
| [center[0] + 100, center[1] + 100], | |
| [center[0], center[1] + 130], | |
| [center[0] - 100, center[1] + 100], | |
| [center[0] - 150, center[1]] | |
| ]; | |
| var input = d3.select("input"); | |
| var svg = d3.select("body").append("svg") | |
| .attr("width", width) | |
| .attr("height", height); | |
| var polygon = svg.append("polygon") | |
| .attr("class", "polygon") | |
| .attr("points", vertices.join(" ")); | |
| var bounds = svg.append("polygon") | |
| .attr("class", "bounds") | |
| .attr("points", geometric.polygonBounds(vertices).join(" ")); | |
| </script> | |
| </body> | |
| </html> |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment