point-at-length - npm Package Compare versions

Comparing version 1.0.0 to 1.0.1

index.js

		@@ -44,4 +44,4 @@ var parse = require('parse-svg-path');
		var t = j / n;
		var x = xof(p, t);
		var y = yof(p, t);
		var x = xof_C(p, t);
		var y = yof_C(p, t);
		len += dist(cur[0], cur[1], x, y);
		@@ -66,2 +66,31 @@
		}
		else if (p[0] === 'Q') {
		prev[0] = cur[0];
		prev[1] = cur[1];
		prev[2] = len;

		var n = 100;
		for (var j = 0; j <= n; j++) {
		var t = j / n;
		var x = xof_Q(p, t);
		var y = yof_Q(p, t);
		len += dist(cur[0], cur[1], x, y);

		cur[0] = x;
		cur[1] = y;

		if (typeof pos === 'number' && len >= pos) {
		var dv = (len - pos) / (len - prev[2]);

		var npos = [
		cur[0] * (1 - dv) + prev[0] * dv,
		cur[1] * (1 - dv) + prev[1] * dv
		];
		return { length: len, pos: npos };
		}
		prev[0] = cur[0];
		prev[1] = cur[1];
		prev[2] = len;
		}
		}
		else if (p[0] === 'L') {
		@@ -78,3 +107,3 @@ len += dist(cur[0], cur[1], p[1], p[2]);
		cur[0] = p[1];
		cur[0] = p[2];
		cur[1] = p[2];
		prev[0] = cur[0];
		@@ -87,3 +116,3 @@ prev[1] = cur[1];

		function xof (p, t) {
		function xof_C (p, t) {
		return Math.pow((1-t), 3) * cur[0]
		@@ -95,3 +124,3 @@ + 3 * Math.pow((1-t), 2) * t * p[1]
		}
		function yof (p, t) {
		function yof_C (p, t) {
		return Math.pow((1-t), 3) * cur[1]
		@@ -103,2 +132,15 @@ + 3 * Math.pow((1-t), 2) * t * p[2]
		}

		function xof_Q (p, t) {
		return Math.pow((1-t), 2) * cur[0]
		+ 2 * (1-t) * t * p[1]
		+ Math.pow(t, 2) * p[3]
		;
		}
		function yof_Q (p, t) {
		return Math.pow((1-t), 2) * cur[1]
		+ 2 * (1-t) * t * p[2]
		+ Math.pow(t, 2) * p[4]
		;
		}
		};
		@@ -105,0 +147,0 @@

package.json

		{
		"name": "point-at-length",
		"version": "1.0.0",
		"version": "1.0.1",
		"description": "compute a point from an svg path string",
		@@ -5,0 +5,0 @@ "main": "index.js",

test/at.js

		@@ -71,2 +71,3 @@ var test = require('tape');
		var pt = points(ptsstr);
		var accuracy = [];

		@@ -78,5 +79,14 @@ for (var i = 0; i < expected.length; i++) {
		var rx = ref[0], ry = ref[1];
		accuracy.push(x / rx, y / ry);
		t.ok(cmp(x, rx, 0.1), x + ' ~~ ' + rx + ' ±10%');
		t.ok(cmp(y, ry, 0.1), y + ' ~~ ' + ry + ' ±10%');
		}

		var sum = 0;
		for (var i = 0; i < accuracy.length; i++) {
		sum += accuracy[i];
		}
		console.log('mean accuracy:',
		Math.floor(sum / accuracy.length * 100 * 100) / 100, '%'
		);
		});
		@@ -83,0 +93,0 @@

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