228 lines
8.4 KiB
JavaScript
228 lines
8.4 KiB
JavaScript
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import { isArray } from '../../core/util.js';
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var PI = Math.PI;
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var PI2 = PI * 2;
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var mathSin = Math.sin;
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var mathCos = Math.cos;
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var mathACos = Math.acos;
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var mathATan2 = Math.atan2;
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var mathAbs = Math.abs;
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var mathSqrt = Math.sqrt;
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var mathMax = Math.max;
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var mathMin = Math.min;
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var e = 1e-4;
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function intersect(x0, y0, x1, y1, x2, y2, x3, y3) {
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var dx10 = x1 - x0;
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var dy10 = y1 - y0;
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var dx32 = x3 - x2;
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var dy32 = y3 - y2;
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var t = dy32 * dx10 - dx32 * dy10;
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if (t * t < e) {
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return;
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}
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t = (dx32 * (y0 - y2) - dy32 * (x0 - x2)) / t;
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return [x0 + t * dx10, y0 + t * dy10];
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}
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function computeCornerTangents(x0, y0, x1, y1, radius, cr, clockwise) {
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var x01 = x0 - x1;
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var y01 = y0 - y1;
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var lo = (clockwise ? cr : -cr) / mathSqrt(x01 * x01 + y01 * y01);
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var ox = lo * y01;
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var oy = -lo * x01;
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var x11 = x0 + ox;
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var y11 = y0 + oy;
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var x10 = x1 + ox;
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var y10 = y1 + oy;
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var x00 = (x11 + x10) / 2;
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var y00 = (y11 + y10) / 2;
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var dx = x10 - x11;
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var dy = y10 - y11;
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var d2 = dx * dx + dy * dy;
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var r = radius - cr;
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var s = x11 * y10 - x10 * y11;
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var d = (dy < 0 ? -1 : 1) * mathSqrt(mathMax(0, r * r * d2 - s * s));
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var cx0 = (s * dy - dx * d) / d2;
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var cy0 = (-s * dx - dy * d) / d2;
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var cx1 = (s * dy + dx * d) / d2;
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var cy1 = (-s * dx + dy * d) / d2;
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var dx0 = cx0 - x00;
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var dy0 = cy0 - y00;
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var dx1 = cx1 - x00;
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var dy1 = cy1 - y00;
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if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) {
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cx0 = cx1;
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cy0 = cy1;
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}
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return {
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cx: cx0,
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cy: cy0,
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x0: -ox,
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y0: -oy,
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x1: cx0 * (radius / r - 1),
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y1: cy0 * (radius / r - 1)
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};
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}
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function normalizeCornerRadius(cr) {
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var arr;
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if (isArray(cr)) {
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var len = cr.length;
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if (!len) {
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return cr;
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}
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if (len === 1) {
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arr = [cr[0], cr[0], 0, 0];
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}
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else if (len === 2) {
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arr = [cr[0], cr[0], cr[1], cr[1]];
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}
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else if (len === 3) {
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arr = cr.concat(cr[2]);
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}
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else {
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arr = cr;
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}
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}
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else {
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arr = [cr, cr, cr, cr];
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}
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return arr;
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}
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export function buildPath(ctx, shape) {
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var _a;
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var radius = mathMax(shape.r, 0);
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var innerRadius = mathMax(shape.r0 || 0, 0);
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var hasRadius = radius > 0;
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var hasInnerRadius = innerRadius > 0;
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if (!hasRadius && !hasInnerRadius) {
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return;
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}
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if (!hasRadius) {
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radius = innerRadius;
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innerRadius = 0;
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}
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if (innerRadius > radius) {
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var tmp = radius;
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radius = innerRadius;
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innerRadius = tmp;
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}
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var startAngle = shape.startAngle, endAngle = shape.endAngle;
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if (isNaN(startAngle) || isNaN(endAngle)) {
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return;
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}
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var cx = shape.cx, cy = shape.cy;
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var clockwise = !!shape.clockwise;
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var arc = mathAbs(endAngle - startAngle);
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var mod = arc > PI2 && arc % PI2;
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mod > e && (arc = mod);
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if (!(radius > e)) {
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ctx.moveTo(cx, cy);
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}
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else if (arc > PI2 - e) {
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ctx.moveTo(cx + radius * mathCos(startAngle), cy + radius * mathSin(startAngle));
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ctx.arc(cx, cy, radius, startAngle, endAngle, !clockwise);
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if (innerRadius > e) {
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ctx.moveTo(cx + innerRadius * mathCos(endAngle), cy + innerRadius * mathSin(endAngle));
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ctx.arc(cx, cy, innerRadius, endAngle, startAngle, clockwise);
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}
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}
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else {
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var icrStart = void 0;
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var icrEnd = void 0;
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var ocrStart = void 0;
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var ocrEnd = void 0;
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var ocrs = void 0;
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var ocre = void 0;
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var icrs = void 0;
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var icre = void 0;
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var ocrMax = void 0;
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var icrMax = void 0;
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var limitedOcrMax = void 0;
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var limitedIcrMax = void 0;
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var xre = void 0;
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var yre = void 0;
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var xirs = void 0;
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var yirs = void 0;
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var xrs = radius * mathCos(startAngle);
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var yrs = radius * mathSin(startAngle);
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var xire = innerRadius * mathCos(endAngle);
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var yire = innerRadius * mathSin(endAngle);
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var hasArc = arc > e;
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if (hasArc) {
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var cornerRadius = shape.cornerRadius;
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if (cornerRadius) {
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_a = normalizeCornerRadius(cornerRadius), icrStart = _a[0], icrEnd = _a[1], ocrStart = _a[2], ocrEnd = _a[3];
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}
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var halfRd = mathAbs(radius - innerRadius) / 2;
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ocrs = mathMin(halfRd, ocrStart);
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ocre = mathMin(halfRd, ocrEnd);
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icrs = mathMin(halfRd, icrStart);
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icre = mathMin(halfRd, icrEnd);
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limitedOcrMax = ocrMax = mathMax(ocrs, ocre);
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limitedIcrMax = icrMax = mathMax(icrs, icre);
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if (ocrMax > e || icrMax > e) {
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xre = radius * mathCos(endAngle);
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yre = radius * mathSin(endAngle);
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xirs = innerRadius * mathCos(startAngle);
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yirs = innerRadius * mathSin(startAngle);
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if (arc < PI) {
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var it_1 = intersect(xrs, yrs, xirs, yirs, xre, yre, xire, yire);
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if (it_1) {
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var x0 = xrs - it_1[0];
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var y0 = yrs - it_1[1];
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var x1 = xre - it_1[0];
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var y1 = yre - it_1[1];
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var a = 1 / mathSin(mathACos((x0 * x1 + y0 * y1) / (mathSqrt(x0 * x0 + y0 * y0) * mathSqrt(x1 * x1 + y1 * y1))) / 2);
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var b = mathSqrt(it_1[0] * it_1[0] + it_1[1] * it_1[1]);
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limitedOcrMax = mathMin(ocrMax, (radius - b) / (a + 1));
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limitedIcrMax = mathMin(icrMax, (innerRadius - b) / (a - 1));
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}
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}
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}
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}
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if (!hasArc) {
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ctx.moveTo(cx + xrs, cy + yrs);
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}
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else if (limitedOcrMax > e) {
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var crStart = mathMin(ocrStart, limitedOcrMax);
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var crEnd = mathMin(ocrEnd, limitedOcrMax);
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var ct0 = computeCornerTangents(xirs, yirs, xrs, yrs, radius, crStart, clockwise);
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var ct1 = computeCornerTangents(xre, yre, xire, yire, radius, crEnd, clockwise);
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ctx.moveTo(cx + ct0.cx + ct0.x0, cy + ct0.cy + ct0.y0);
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if (limitedOcrMax < ocrMax && crStart === crEnd) {
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ctx.arc(cx + ct0.cx, cy + ct0.cy, limitedOcrMax, mathATan2(ct0.y0, ct0.x0), mathATan2(ct1.y0, ct1.x0), !clockwise);
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}
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else {
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crStart > 0 && ctx.arc(cx + ct0.cx, cy + ct0.cy, crStart, mathATan2(ct0.y0, ct0.x0), mathATan2(ct0.y1, ct0.x1), !clockwise);
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ctx.arc(cx, cy, radius, mathATan2(ct0.cy + ct0.y1, ct0.cx + ct0.x1), mathATan2(ct1.cy + ct1.y1, ct1.cx + ct1.x1), !clockwise);
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crEnd > 0 && ctx.arc(cx + ct1.cx, cy + ct1.cy, crEnd, mathATan2(ct1.y1, ct1.x1), mathATan2(ct1.y0, ct1.x0), !clockwise);
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}
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}
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else {
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ctx.moveTo(cx + xrs, cy + yrs);
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ctx.arc(cx, cy, radius, startAngle, endAngle, !clockwise);
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}
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if (!(innerRadius > e) || !hasArc) {
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ctx.lineTo(cx + xire, cy + yire);
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}
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else if (limitedIcrMax > e) {
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var crStart = mathMin(icrStart, limitedIcrMax);
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var crEnd = mathMin(icrEnd, limitedIcrMax);
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var ct0 = computeCornerTangents(xire, yire, xre, yre, innerRadius, -crEnd, clockwise);
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var ct1 = computeCornerTangents(xrs, yrs, xirs, yirs, innerRadius, -crStart, clockwise);
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ctx.lineTo(cx + ct0.cx + ct0.x0, cy + ct0.cy + ct0.y0);
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if (limitedIcrMax < icrMax && crStart === crEnd) {
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ctx.arc(cx + ct0.cx, cy + ct0.cy, limitedIcrMax, mathATan2(ct0.y0, ct0.x0), mathATan2(ct1.y0, ct1.x0), !clockwise);
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}
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else {
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crEnd > 0 && ctx.arc(cx + ct0.cx, cy + ct0.cy, crEnd, mathATan2(ct0.y0, ct0.x0), mathATan2(ct0.y1, ct0.x1), !clockwise);
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ctx.arc(cx, cy, innerRadius, mathATan2(ct0.cy + ct0.y1, ct0.cx + ct0.x1), mathATan2(ct1.cy + ct1.y1, ct1.cx + ct1.x1), clockwise);
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crStart > 0 && ctx.arc(cx + ct1.cx, cy + ct1.cy, crStart, mathATan2(ct1.y1, ct1.x1), mathATan2(ct1.y0, ct1.x0), !clockwise);
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}
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}
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else {
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ctx.lineTo(cx + xire, cy + yire);
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ctx.arc(cx, cy, innerRadius, endAngle, startAngle, clockwise);
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}
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}
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ctx.closePath();
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}
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