1 line
24 KiB
JSON
1 line
24 KiB
JSON
|
{"ast":null,"code":"import { cubicSubdivide } from '../core/curve.js';\nimport PathProxy from '../core/PathProxy.js';\nvar CMD = PathProxy.CMD;\n\nfunction aroundEqual(a, b) {\n return Math.abs(a - b) < 1e-5;\n}\n\nexport function pathToBezierCurves(path) {\n var data = path.data;\n var len = path.len();\n var bezierArrayGroups = [];\n var currentSubpath;\n var xi = 0;\n var yi = 0;\n var x0 = 0;\n var y0 = 0;\n\n function createNewSubpath(x, y) {\n if (currentSubpath && currentSubpath.length > 2) {\n bezierArrayGroups.push(currentSubpath);\n }\n\n currentSubpath = [x, y];\n }\n\n function addLine(x0, y0, x1, y1) {\n if (!(aroundEqual(x0, x1) && aroundEqual(y0, y1))) {\n currentSubpath.push(x0, y0, x1, y1, x1, y1);\n }\n }\n\n function addArc(startAngle, endAngle, cx, cy, rx, ry) {\n var delta = Math.abs(endAngle - startAngle);\n var len = Math.tan(delta / 4) * 4 / 3;\n var dir = endAngle < startAngle ? -1 : 1;\n var c1 = Math.cos(startAngle);\n var s1 = Math.sin(startAngle);\n var c2 = Math.cos(endAngle);\n var s2 = Math.sin(endAngle);\n var x1 = c1 * rx + cx;\n var y1 = s1 * ry + cy;\n var x4 = c2 * rx + cx;\n var y4 = s2 * ry + cy;\n var hx = rx * len * dir;\n var hy = ry * len * dir;\n currentSubpath.push(x1 - hx * s1, y1 + hy * c1, x4 + hx * s2, y4 - hy * c2, x4, y4);\n }\n\n var x1;\n var y1;\n var x2;\n var y2;\n\n for (var i = 0; i < len;) {\n var cmd = data[i++];\n var isFirst = i === 1;\n\n if (isFirst) {\n xi = data[i];\n yi = data[i + 1];\n x0 = xi;\n y0 = yi;\n\n if (cmd === CMD.L || cmd === CMD.C || cmd === CMD.Q) {\n currentSubpath = [x0, y0];\n }\n }\n\n switch (cmd) {\n case CMD.M:\n xi = x0 = data[i++];\n yi = y0 = data[i++];\n createNewSubpath(x0, y0);\n break;\n\n case CMD.L:\n x1 = data[i++];\n y1 = data[i++];\n addLine(xi, yi, x1, y1);\n xi = x1;\n yi = y1;\n break;\n\n case CMD.C:\n currentSubpath.push(data[i++], data[i++], data[i++], data[i++], xi = data[i++], yi = data[i++]);\n break;\n\n case CMD.Q:\n x1 = data[i++];\n y1 = data[i++];\n x2 = data[i++];\n y2 = data[i++];\n currentSubpath.push(xi + 2 / 3 * (x1 - xi), yi + 2 / 3 * (y1 - yi), x2 + 2 / 3 * (x1 - x2), y2 + 2 / 3 * (y1 - y2), x2, y2);\n xi = x2;\n yi = y2;\n break;\n\n case CMD.A:\n var cx = data[i++];\n var cy = data[i++];\n var rx = data[i++];\n var ry = data[i++];\n var startAngle = data[i++];\n var endAngle = data[i++] + startAngle;\n i += 1;\n var anticlockwise = !data[i++];\n x1 = Math.cos(startAngle) * rx + cx;\n y1 = Math.sin(startAngle) * ry + cy;\n\n if (isFirst) {\n x0 = x1;\n y0 = y1;\n createNewSubpath(x0, y0);\n } else {\n addLine(xi, yi, x1, y1);\n }\n\n xi = Math.cos(endAngle) * rx + cx;\n yi = Math.sin(endAngle) * ry + cy;\n var step = (anticlockwise ? -1 : 1) * Math.PI / 2;\n\n for (var angle = startAngle; anticlockwise ? angle > endAngle : angle < endAngle; angle += step) {\n var nextAngle = anticlockwise ? Math.max(angle + step, endAngle) : Math.min(angle + step, endAngle);\n addArc(angle, nextAngle, cx, cy, rx, ry);\n }\n\n break;\n\n case CMD.R:\n x0 = xi = data[i++];\n y0 = yi = data[i++];\n x1 = x0 + data[i++];\n y1 = y0 + data[i++];\n createNewSubpath(x1, y0);\n addLine(x1, y0, x1, y1);\n addLine(x1, y1, x0, y1);\n addLine(x0, y1, x0, y0);\n addLine(x0, y0, x1, y0);\n break;\n\n case CMD.Z:\n currentSubpath && addLine(xi, yi, x0, y0);\n xi = x0;\n yi = y0;\n break;\n }\n }\n\n if (currentSubpath && currentSubpath.length > 2) {\n bezierArrayGroups.push(currentSubpath);\n }\n\n return bezierArrayGroups;\n}\n\nfunct
|