Created
November 23, 2016 11:05
-
-
Save mitselek/ef53e8d5775559114ad8d1fc8c07115f to your computer and use it in GitHub Desktop.
Test if two segments intersect
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
function intersect(a,b,c,d) { | |
var a_cd = (d.x - c.x) * (a.y - c.y) > (d.y - c.y) * (a.x - c.x) | |
var b_cd = (d.x - c.x) * (b.y - c.y) > (d.y - c.y) * (b.x - c.x) | |
var c_ab = (b.x - a.x) * (c.y - a.y) > (b.y - a.y) * (c.x - a.x) | |
var d_ab = (b.x - a.x) * (d.y - a.y) > (b.y - a.y) * (d.x - a.x) | |
return a_cd !== b_cd && c_ab !== d_ab | |
} | |
console.log(intersect({x:0,y:0},{x:1,y:1},{x:1,y:0},{x:0,y:1})) |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment