Instantly share code, notes, and snippets.

Embed
What would you like to do?
de Casteljau's algorithm in javascript
function bezier(pts) {
return function (t) {
for (var a = pts; a.length > 1; a = b) // do..while loop in disguise
for (var i = 0, b = [], j; i < a.length - 1; i++) // cycle over control points
for (b[i] = [], j = 0; j < a[i].length; j++) // cycle over dimensions
b[i][j] = a[i][j] * (1 - t) + a[i+1][j] * t; // interpolation
return a[0];
}
}
/* example usage:
var b = bezier([[0, 0, 0], [1, 1, 1], [2, -3, 6]]);
for (var t = 0; t <= 10; t++) console.log(b(t/10));
*/
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment