1 line
7.6 KiB
JSON
1 line
7.6 KiB
JSON
{"ast":null,"code":"function Natural(context) {\n this._context = context;\n}\nNatural.prototype = {\n areaStart: function () {\n this._line = 0;\n },\n areaEnd: function () {\n this._line = NaN;\n },\n lineStart: function () {\n this._x = [];\n this._y = [];\n },\n lineEnd: function () {\n var x = this._x,\n y = this._y,\n n = x.length;\n if (n) {\n this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]);\n if (n === 2) {\n this._context.lineTo(x[1], y[1]);\n } else {\n var px = controlPoints(x),\n py = controlPoints(y);\n for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) {\n this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]);\n }\n }\n }\n if (this._line || this._line !== 0 && n === 1) this._context.closePath();\n this._line = 1 - this._line;\n this._x = this._y = null;\n },\n point: function (x, y) {\n this._x.push(+x);\n this._y.push(+y);\n }\n};\n\n// See https://www.particleincell.com/2012/bezier-splines/ for derivation.\nfunction controlPoints(x) {\n var i,\n n = x.length - 1,\n m,\n a = new Array(n),\n b = new Array(n),\n r = new Array(n);\n a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1];\n for (i = 1; 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