Created
September 4, 2015 02:34
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var distance = require('euclidean-distance') | |
var lerp = require('lerp') | |
var pts = [[0, 0], [1, 4], [2, 9], [3, 2], [2, 0]] | |
//console.log(pts) | |
var distances = [] | |
var sum = [] | |
var total = 0 | |
sum[0] = 0 | |
distances[0] = 0 | |
for (var i = 1, n = pts.length; i < n; i++) { | |
distances[i] = distance(pts[i - 1], pts[i]) | |
total += distances[i] | |
sum[i] = total | |
} | |
var d | |
for (var t = 0.0; t <= 1.0; t += 0.01) { | |
d = total * t | |
for (var j = 0, m = sum.length - 1; j < m; j++) { | |
if ((d >= sum[j]) && (d <= sum[j + 1])) { | |
break | |
} | |
} | |
var pt = pts[j] | |
var x1 = pt[0] | |
var y1 = pt[1] | |
var pt = pts[j + 1] | |
var x2 = pt[0] | |
var y2 = pt[1] | |
var x = lerp(x1, x2, (d - sum[j]) / distances[j + 1]) | |
var y = lerp(y1, y2, (d - sum[j]) / distances[j + 1]) | |
console.log(x, y) | |
} |
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