1 line
10 KiB
JSON
1 line
10 KiB
JSON
{"ast":null,"code":"import { epsilon } from \"../math.js\";\nimport { Cardinal } from \"./cardinal.js\";\nexport function point(that, x, y) {\n var x1 = that._x1,\n y1 = that._y1,\n x2 = that._x2,\n y2 = that._y2;\n if (that._l01_a > epsilon) {\n var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a,\n n = 3 * that._l01_a * (that._l01_a + that._l12_a);\n x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n;\n y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n;\n }\n if (that._l23_a > epsilon) {\n var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a,\n m = 3 * that._l23_a * (that._l23_a + that._l12_a);\n x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m;\n y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m;\n }\n that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2);\n}\nfunction CatmullRom(context, alpha) {\n this._context = context;\n this._alpha = alpha;\n}\nCatmullRom.prototype = {\n areaStart: function () {\n this._line = 0;\n },\n areaEnd: function () {\n this._line = NaN;\n },\n lineStart: function () {\n this._x0 = this._x1 = this._x2 = this._y0 = this._y1 = this._y2 = NaN;\n this._l01_a = this._l12_a = this._l23_a = this._l01_2a = this._l12_2a = this._l23_2a = this._point = 0;\n },\n lineEnd: function () {\n switch (this._point) {\n case 2:\n this._context.lineTo(this._x2, this._y2);\n break;\n case 3:\n this.point(this._x2, this._y2);\n break;\n }\n if (this._line || this._line !== 0 && this._point === 1) this._context.closePath();\n this._line = 1 - this._line;\n },\n point: function (x, y) {\n x = +x, y = +y;\n if (this._point) {\n var x23 = this._x2 - x,\n y23 = this._y2 - y;\n this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));\n }\n switch (this._point) {\n case 0:\n this._point = 1;\n this._line ? 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