1950 lines
51 KiB
JavaScript
1950 lines
51 KiB
JavaScript
// https://d3js.org/d3-shape/ v1.3.7 Copyright 2019 Mike Bostock
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(function (global, factory) {
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typeof exports === 'object' && typeof module !== 'undefined' ? factory(exports, require('d3-path')) :
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typeof define === 'function' && define.amd ? define(['exports', 'd3-path'], factory) :
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(global = global || self, factory(global.d3 = global.d3 || {}, global.d3));
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}(this, function (exports, d3Path) { 'use strict';
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function constant(x) {
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return function constant() {
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return x;
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};
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}
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var abs = Math.abs;
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var atan2 = Math.atan2;
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var cos = Math.cos;
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var max = Math.max;
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var min = Math.min;
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var sin = Math.sin;
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var sqrt = Math.sqrt;
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var epsilon = 1e-12;
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var pi = Math.PI;
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var halfPi = pi / 2;
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var tau = 2 * pi;
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function acos(x) {
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return x > 1 ? 0 : x < -1 ? pi : Math.acos(x);
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}
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function asin(x) {
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return x >= 1 ? halfPi : x <= -1 ? -halfPi : Math.asin(x);
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}
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function arcInnerRadius(d) {
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return d.innerRadius;
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}
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function arcOuterRadius(d) {
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return d.outerRadius;
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}
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function arcStartAngle(d) {
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return d.startAngle;
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}
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function arcEndAngle(d) {
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return d.endAngle;
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}
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function arcPadAngle(d) {
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return d && d.padAngle; // Note: optional!
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}
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function intersect(x0, y0, x1, y1, x2, y2, x3, y3) {
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var x10 = x1 - x0, y10 = y1 - y0,
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x32 = x3 - x2, y32 = y3 - y2,
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t = y32 * x10 - x32 * y10;
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if (t * t < epsilon) return;
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t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / t;
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return [x0 + t * x10, y0 + t * y10];
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}
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// Compute perpendicular offset line of length rc.
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// http://mathworld.wolfram.com/Circle-LineIntersection.html
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function cornerTangents(x0, y0, x1, y1, r1, rc, cw) {
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var x01 = x0 - x1,
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y01 = y0 - y1,
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lo = (cw ? rc : -rc) / sqrt(x01 * x01 + y01 * y01),
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ox = lo * y01,
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oy = -lo * x01,
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x11 = x0 + ox,
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y11 = y0 + oy,
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x10 = x1 + ox,
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y10 = y1 + oy,
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x00 = (x11 + x10) / 2,
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y00 = (y11 + y10) / 2,
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dx = x10 - x11,
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dy = y10 - y11,
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d2 = dx * dx + dy * dy,
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r = r1 - rc,
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D = x11 * y10 - x10 * y11,
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d = (dy < 0 ? -1 : 1) * sqrt(max(0, r * r * d2 - D * D)),
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cx0 = (D * dy - dx * d) / d2,
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cy0 = (-D * dx - dy * d) / d2,
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cx1 = (D * dy + dx * d) / d2,
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cy1 = (-D * dx + dy * d) / d2,
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dx0 = cx0 - x00,
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dy0 = cy0 - y00,
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dx1 = cx1 - x00,
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dy1 = cy1 - y00;
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// Pick the closer of the two intersection points.
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// TODO Is there a faster way to determine which intersection to use?
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if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;
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return {
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cx: cx0,
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cy: cy0,
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x01: -ox,
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y01: -oy,
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x11: cx0 * (r1 / r - 1),
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y11: cy0 * (r1 / r - 1)
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};
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}
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function arc() {
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var innerRadius = arcInnerRadius,
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outerRadius = arcOuterRadius,
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cornerRadius = constant(0),
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padRadius = null,
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startAngle = arcStartAngle,
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endAngle = arcEndAngle,
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padAngle = arcPadAngle,
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context = null;
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function arc() {
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var buffer,
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r,
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r0 = +innerRadius.apply(this, arguments),
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r1 = +outerRadius.apply(this, arguments),
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a0 = startAngle.apply(this, arguments) - halfPi,
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a1 = endAngle.apply(this, arguments) - halfPi,
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da = abs(a1 - a0),
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cw = a1 > a0;
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if (!context) context = buffer = d3Path.path();
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// Ensure that the outer radius is always larger than the inner radius.
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if (r1 < r0) r = r1, r1 = r0, r0 = r;
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// Is it a point?
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if (!(r1 > epsilon)) context.moveTo(0, 0);
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// Or is it a circle or annulus?
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else if (da > tau - epsilon) {
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context.moveTo(r1 * cos(a0), r1 * sin(a0));
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context.arc(0, 0, r1, a0, a1, !cw);
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if (r0 > epsilon) {
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context.moveTo(r0 * cos(a1), r0 * sin(a1));
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context.arc(0, 0, r0, a1, a0, cw);
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}
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}
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// Or is it a circular or annular sector?
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else {
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var a01 = a0,
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a11 = a1,
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a00 = a0,
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a10 = a1,
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da0 = da,
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da1 = da,
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ap = padAngle.apply(this, arguments) / 2,
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rp = (ap > epsilon) && (padRadius ? +padRadius.apply(this, arguments) : sqrt(r0 * r0 + r1 * r1)),
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rc = min(abs(r1 - r0) / 2, +cornerRadius.apply(this, arguments)),
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rc0 = rc,
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rc1 = rc,
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t0,
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t1;
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// Apply padding? Note that since r1 ≥ r0, da1 ≥ da0.
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if (rp > epsilon) {
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var p0 = asin(rp / r0 * sin(ap)),
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p1 = asin(rp / r1 * sin(ap));
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if ((da0 -= p0 * 2) > epsilon) p0 *= (cw ? 1 : -1), a00 += p0, a10 -= p0;
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else da0 = 0, a00 = a10 = (a0 + a1) / 2;
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if ((da1 -= p1 * 2) > epsilon) p1 *= (cw ? 1 : -1), a01 += p1, a11 -= p1;
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else da1 = 0, a01 = a11 = (a0 + a1) / 2;
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}
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var x01 = r1 * cos(a01),
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y01 = r1 * sin(a01),
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x10 = r0 * cos(a10),
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y10 = r0 * sin(a10);
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// Apply rounded corners?
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if (rc > epsilon) {
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var x11 = r1 * cos(a11),
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y11 = r1 * sin(a11),
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x00 = r0 * cos(a00),
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y00 = r0 * sin(a00),
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oc;
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// Restrict the corner radius according to the sector angle.
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if (da < pi && (oc = intersect(x01, y01, x00, y00, x11, y11, x10, y10))) {
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var ax = x01 - oc[0],
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ay = y01 - oc[1],
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bx = x11 - oc[0],
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by = y11 - oc[1],
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kc = 1 / sin(acos((ax * bx + ay * by) / (sqrt(ax * ax + ay * ay) * sqrt(bx * bx + by * by))) / 2),
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lc = sqrt(oc[0] * oc[0] + oc[1] * oc[1]);
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rc0 = min(rc, (r0 - lc) / (kc - 1));
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rc1 = min(rc, (r1 - lc) / (kc + 1));
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}
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}
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// Is the sector collapsed to a line?
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if (!(da1 > epsilon)) context.moveTo(x01, y01);
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// Does the sector’s outer ring have rounded corners?
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else if (rc1 > epsilon) {
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t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw);
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t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw);
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context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01);
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// Have the corners merged?
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if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, atan2(t0.y01, t0.x01), atan2(t1.y01, t1.x01), !cw);
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// Otherwise, draw the two corners and the ring.
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else {
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context.arc(t0.cx, t0.cy, rc1, atan2(t0.y01, t0.x01), atan2(t0.y11, t0.x11), !cw);
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context.arc(0, 0, r1, atan2(t0.cy + t0.y11, t0.cx + t0.x11), atan2(t1.cy + t1.y11, t1.cx + t1.x11), !cw);
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context.arc(t1.cx, t1.cy, rc1, atan2(t1.y11, t1.x11), atan2(t1.y01, t1.x01), !cw);
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}
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}
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// Or is the outer ring just a circular arc?
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else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw);
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// Is there no inner ring, and it’s a circular sector?
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// Or perhaps it’s an annular sector collapsed due to padding?
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if (!(r0 > epsilon) || !(da0 > epsilon)) context.lineTo(x10, y10);
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// Does the sector’s inner ring (or point) have rounded corners?
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else if (rc0 > epsilon) {
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t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw);
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t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw);
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context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01);
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// Have the corners merged?
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if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, atan2(t0.y01, t0.x01), atan2(t1.y01, t1.x01), !cw);
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// Otherwise, draw the two corners and the ring.
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else {
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context.arc(t0.cx, t0.cy, rc0, atan2(t0.y01, t0.x01), atan2(t0.y11, t0.x11), !cw);
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context.arc(0, 0, r0, atan2(t0.cy + t0.y11, t0.cx + t0.x11), atan2(t1.cy + t1.y11, t1.cx + t1.x11), cw);
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context.arc(t1.cx, t1.cy, rc0, atan2(t1.y11, t1.x11), atan2(t1.y01, t1.x01), !cw);
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}
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}
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// Or is the inner ring just a circular arc?
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else context.arc(0, 0, r0, a10, a00, cw);
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}
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context.closePath();
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if (buffer) return context = null, buffer + "" || null;
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}
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arc.centroid = function() {
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var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2,
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a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - pi / 2;
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return [cos(a) * r, sin(a) * r];
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};
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arc.innerRadius = function(_) {
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return arguments.length ? (innerRadius = typeof _ === "function" ? _ : constant(+_), arc) : innerRadius;
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};
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arc.outerRadius = function(_) {
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return arguments.length ? (outerRadius = typeof _ === "function" ? _ : constant(+_), arc) : outerRadius;
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};
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arc.cornerRadius = function(_) {
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return arguments.length ? (cornerRadius = typeof _ === "function" ? _ : constant(+_), arc) : cornerRadius;
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};
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arc.padRadius = function(_) {
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return arguments.length ? (padRadius = _ == null ? null : typeof _ === "function" ? _ : constant(+_), arc) : padRadius;
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};
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arc.startAngle = function(_) {
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return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant(+_), arc) : startAngle;
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};
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arc.endAngle = function(_) {
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return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant(+_), arc) : endAngle;
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};
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arc.padAngle = function(_) {
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return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant(+_), arc) : padAngle;
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};
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arc.context = function(_) {
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return arguments.length ? ((context = _ == null ? null : _), arc) : context;
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};
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return arc;
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}
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function Linear(context) {
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this._context = context;
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}
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Linear.prototype = {
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areaStart: function() {
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this._line = 0;
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},
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areaEnd: function() {
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this._line = NaN;
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},
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lineStart: function() {
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this._point = 0;
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},
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lineEnd: function() {
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if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
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this._line = 1 - this._line;
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},
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point: function(x, y) {
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x = +x, y = +y;
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switch (this._point) {
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case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
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case 1: this._point = 2; // proceed
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default: this._context.lineTo(x, y); break;
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}
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}
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};
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function curveLinear(context) {
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return new Linear(context);
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}
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function x(p) {
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return p[0];
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}
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function y(p) {
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return p[1];
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}
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function line() {
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var x$1 = x,
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y$1 = y,
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defined = constant(true),
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context = null,
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curve = curveLinear,
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output = null;
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function line(data) {
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var i,
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n = data.length,
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d,
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defined0 = false,
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buffer;
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if (context == null) output = curve(buffer = d3Path.path());
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for (i = 0; i <= n; ++i) {
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if (!(i < n && defined(d = data[i], i, data)) === defined0) {
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if (defined0 = !defined0) output.lineStart();
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else output.lineEnd();
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}
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if (defined0) output.point(+x$1(d, i, data), +y$1(d, i, data));
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}
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if (buffer) return output = null, buffer + "" || null;
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}
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line.x = function(_) {
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return arguments.length ? (x$1 = typeof _ === "function" ? _ : constant(+_), line) : x$1;
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};
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line.y = function(_) {
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return arguments.length ? (y$1 = typeof _ === "function" ? _ : constant(+_), line) : y$1;
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};
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line.defined = function(_) {
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return arguments.length ? (defined = typeof _ === "function" ? _ : constant(!!_), line) : defined;
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};
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line.curve = function(_) {
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return arguments.length ? (curve = _, context != null && (output = curve(context)), line) : curve;
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};
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line.context = function(_) {
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return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), line) : context;
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};
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return line;
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}
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function area() {
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var x0 = x,
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x1 = null,
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y0 = constant(0),
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y1 = y,
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defined = constant(true),
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context = null,
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curve = curveLinear,
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output = null;
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function area(data) {
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var i,
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j,
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k,
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n = data.length,
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d,
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defined0 = false,
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buffer,
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x0z = new Array(n),
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y0z = new Array(n);
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if (context == null) output = curve(buffer = d3Path.path());
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for (i = 0; i <= n; ++i) {
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if (!(i < n && defined(d = data[i], i, data)) === defined0) {
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if (defined0 = !defined0) {
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j = i;
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output.areaStart();
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output.lineStart();
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} else {
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output.lineEnd();
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output.lineStart();
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for (k = i - 1; k >= j; --k) {
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output.point(x0z[k], y0z[k]);
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}
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output.lineEnd();
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output.areaEnd();
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}
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}
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if (defined0) {
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x0z[i] = +x0(d, i, data), y0z[i] = +y0(d, i, data);
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output.point(x1 ? +x1(d, i, data) : x0z[i], y1 ? +y1(d, i, data) : y0z[i]);
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}
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}
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if (buffer) return output = null, buffer + "" || null;
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}
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function arealine() {
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return line().defined(defined).curve(curve).context(context);
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}
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area.x = function(_) {
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return arguments.length ? (x0 = typeof _ === "function" ? _ : constant(+_), x1 = null, area) : x0;
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};
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area.x0 = function(_) {
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return arguments.length ? (x0 = typeof _ === "function" ? _ : constant(+_), area) : x0;
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};
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area.x1 = function(_) {
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return arguments.length ? (x1 = _ == null ? null : typeof _ === "function" ? _ : constant(+_), area) : x1;
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};
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area.y = function(_) {
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return arguments.length ? (y0 = typeof _ === "function" ? _ : constant(+_), y1 = null, area) : y0;
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};
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area.y0 = function(_) {
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return arguments.length ? (y0 = typeof _ === "function" ? _ : constant(+_), area) : y0;
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};
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area.y1 = function(_) {
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return arguments.length ? (y1 = _ == null ? null : typeof _ === "function" ? _ : constant(+_), area) : y1;
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};
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area.lineX0 =
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area.lineY0 = function() {
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return arealine().x(x0).y(y0);
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};
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area.lineY1 = function() {
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return arealine().x(x0).y(y1);
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};
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area.lineX1 = function() {
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return arealine().x(x1).y(y0);
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};
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area.defined = function(_) {
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||
return arguments.length ? (defined = typeof _ === "function" ? _ : constant(!!_), area) : defined;
|
||
};
|
||
|
||
area.curve = function(_) {
|
||
return arguments.length ? (curve = _, context != null && (output = curve(context)), area) : curve;
|
||
};
|
||
|
||
area.context = function(_) {
|
||
return arguments.length ? (_ == null ? context = output = null : output = curve(context = _), area) : context;
|
||
};
|
||
|
||
return area;
|
||
}
|
||
|
||
function descending(a, b) {
|
||
return b < a ? -1 : b > a ? 1 : b >= a ? 0 : NaN;
|
||
}
|
||
|
||
function identity(d) {
|
||
return d;
|
||
}
|
||
|
||
function pie() {
|
||
var value = identity,
|
||
sortValues = descending,
|
||
sort = null,
|
||
startAngle = constant(0),
|
||
endAngle = constant(tau),
|
||
padAngle = constant(0);
|
||
|
||
function pie(data) {
|
||
var i,
|
||
n = data.length,
|
||
j,
|
||
k,
|
||
sum = 0,
|
||
index = new Array(n),
|
||
arcs = new Array(n),
|
||
a0 = +startAngle.apply(this, arguments),
|
||
da = Math.min(tau, Math.max(-tau, endAngle.apply(this, arguments) - a0)),
|
||
a1,
|
||
p = Math.min(Math.abs(da) / n, padAngle.apply(this, arguments)),
|
||
pa = p * (da < 0 ? -1 : 1),
|
||
v;
|
||
|
||
for (i = 0; i < n; ++i) {
|
||
if ((v = arcs[index[i] = i] = +value(data[i], i, data)) > 0) {
|
||
sum += v;
|
||
}
|
||
}
|
||
|
||
// Optionally sort the arcs by previously-computed values or by data.
|
||
if (sortValues != null) index.sort(function(i, j) { return sortValues(arcs[i], arcs[j]); });
|
||
else if (sort != null) index.sort(function(i, j) { return sort(data[i], data[j]); });
|
||
|
||
// Compute the arcs! They are stored in the original data's order.
|
||
for (i = 0, k = sum ? (da - n * pa) / sum : 0; i < n; ++i, a0 = a1) {
|
||
j = index[i], v = arcs[j], a1 = a0 + (v > 0 ? v * k : 0) + pa, arcs[j] = {
|
||
data: data[j],
|
||
index: i,
|
||
value: v,
|
||
startAngle: a0,
|
||
endAngle: a1,
|
||
padAngle: p
|
||
};
|
||
}
|
||
|
||
return arcs;
|
||
}
|
||
|
||
pie.value = function(_) {
|
||
return arguments.length ? (value = typeof _ === "function" ? _ : constant(+_), pie) : value;
|
||
};
|
||
|
||
pie.sortValues = function(_) {
|
||
return arguments.length ? (sortValues = _, sort = null, pie) : sortValues;
|
||
};
|
||
|
||
pie.sort = function(_) {
|
||
return arguments.length ? (sort = _, sortValues = null, pie) : sort;
|
||
};
|
||
|
||
pie.startAngle = function(_) {
|
||
return arguments.length ? (startAngle = typeof _ === "function" ? _ : constant(+_), pie) : startAngle;
|
||
};
|
||
|
||
pie.endAngle = function(_) {
|
||
return arguments.length ? (endAngle = typeof _ === "function" ? _ : constant(+_), pie) : endAngle;
|
||
};
|
||
|
||
pie.padAngle = function(_) {
|
||
return arguments.length ? (padAngle = typeof _ === "function" ? _ : constant(+_), pie) : padAngle;
|
||
};
|
||
|
||
return pie;
|
||
}
|
||
|
||
var curveRadialLinear = curveRadial(curveLinear);
|
||
|
||
function Radial(curve) {
|
||
this._curve = curve;
|
||
}
|
||
|
||
Radial.prototype = {
|
||
areaStart: function() {
|
||
this._curve.areaStart();
|
||
},
|
||
areaEnd: function() {
|
||
this._curve.areaEnd();
|
||
},
|
||
lineStart: function() {
|
||
this._curve.lineStart();
|
||
},
|
||
lineEnd: function() {
|
||
this._curve.lineEnd();
|
||
},
|
||
point: function(a, r) {
|
||
this._curve.point(r * Math.sin(a), r * -Math.cos(a));
|
||
}
|
||
};
|
||
|
||
function curveRadial(curve) {
|
||
|
||
function radial(context) {
|
||
return new Radial(curve(context));
|
||
}
|
||
|
||
radial._curve = curve;
|
||
|
||
return radial;
|
||
}
|
||
|
||
function lineRadial(l) {
|
||
var c = l.curve;
|
||
|
||
l.angle = l.x, delete l.x;
|
||
l.radius = l.y, delete l.y;
|
||
|
||
l.curve = function(_) {
|
||
return arguments.length ? c(curveRadial(_)) : c()._curve;
|
||
};
|
||
|
||
return l;
|
||
}
|
||
|
||
function lineRadial$1() {
|
||
return lineRadial(line().curve(curveRadialLinear));
|
||
}
|
||
|
||
function areaRadial() {
|
||
var a = area().curve(curveRadialLinear),
|
||
c = a.curve,
|
||
x0 = a.lineX0,
|
||
x1 = a.lineX1,
|
||
y0 = a.lineY0,
|
||
y1 = a.lineY1;
|
||
|
||
a.angle = a.x, delete a.x;
|
||
a.startAngle = a.x0, delete a.x0;
|
||
a.endAngle = a.x1, delete a.x1;
|
||
a.radius = a.y, delete a.y;
|
||
a.innerRadius = a.y0, delete a.y0;
|
||
a.outerRadius = a.y1, delete a.y1;
|
||
a.lineStartAngle = function() { return lineRadial(x0()); }, delete a.lineX0;
|
||
a.lineEndAngle = function() { return lineRadial(x1()); }, delete a.lineX1;
|
||
a.lineInnerRadius = function() { return lineRadial(y0()); }, delete a.lineY0;
|
||
a.lineOuterRadius = function() { return lineRadial(y1()); }, delete a.lineY1;
|
||
|
||
a.curve = function(_) {
|
||
return arguments.length ? c(curveRadial(_)) : c()._curve;
|
||
};
|
||
|
||
return a;
|
||
}
|
||
|
||
function pointRadial(x, y) {
|
||
return [(y = +y) * Math.cos(x -= Math.PI / 2), y * Math.sin(x)];
|
||
}
|
||
|
||
var slice = Array.prototype.slice;
|
||
|
||
function linkSource(d) {
|
||
return d.source;
|
||
}
|
||
|
||
function linkTarget(d) {
|
||
return d.target;
|
||
}
|
||
|
||
function link(curve) {
|
||
var source = linkSource,
|
||
target = linkTarget,
|
||
x$1 = x,
|
||
y$1 = y,
|
||
context = null;
|
||
|
||
function link() {
|
||
var buffer, argv = slice.call(arguments), s = source.apply(this, argv), t = target.apply(this, argv);
|
||
if (!context) context = buffer = d3Path.path();
|
||
curve(context, +x$1.apply(this, (argv[0] = s, argv)), +y$1.apply(this, argv), +x$1.apply(this, (argv[0] = t, argv)), +y$1.apply(this, argv));
|
||
if (buffer) return context = null, buffer + "" || null;
|
||
}
|
||
|
||
link.source = function(_) {
|
||
return arguments.length ? (source = _, link) : source;
|
||
};
|
||
|
||
link.target = function(_) {
|
||
return arguments.length ? (target = _, link) : target;
|
||
};
|
||
|
||
link.x = function(_) {
|
||
return arguments.length ? (x$1 = typeof _ === "function" ? _ : constant(+_), link) : x$1;
|
||
};
|
||
|
||
link.y = function(_) {
|
||
return arguments.length ? (y$1 = typeof _ === "function" ? _ : constant(+_), link) : y$1;
|
||
};
|
||
|
||
link.context = function(_) {
|
||
return arguments.length ? ((context = _ == null ? null : _), link) : context;
|
||
};
|
||
|
||
return link;
|
||
}
|
||
|
||
function curveHorizontal(context, x0, y0, x1, y1) {
|
||
context.moveTo(x0, y0);
|
||
context.bezierCurveTo(x0 = (x0 + x1) / 2, y0, x0, y1, x1, y1);
|
||
}
|
||
|
||
function curveVertical(context, x0, y0, x1, y1) {
|
||
context.moveTo(x0, y0);
|
||
context.bezierCurveTo(x0, y0 = (y0 + y1) / 2, x1, y0, x1, y1);
|
||
}
|
||
|
||
function curveRadial$1(context, x0, y0, x1, y1) {
|
||
var p0 = pointRadial(x0, y0),
|
||
p1 = pointRadial(x0, y0 = (y0 + y1) / 2),
|
||
p2 = pointRadial(x1, y0),
|
||
p3 = pointRadial(x1, y1);
|
||
context.moveTo(p0[0], p0[1]);
|
||
context.bezierCurveTo(p1[0], p1[1], p2[0], p2[1], p3[0], p3[1]);
|
||
}
|
||
|
||
function linkHorizontal() {
|
||
return link(curveHorizontal);
|
||
}
|
||
|
||
function linkVertical() {
|
||
return link(curveVertical);
|
||
}
|
||
|
||
function linkRadial() {
|
||
var l = link(curveRadial$1);
|
||
l.angle = l.x, delete l.x;
|
||
l.radius = l.y, delete l.y;
|
||
return l;
|
||
}
|
||
|
||
var circle = {
|
||
draw: function(context, size) {
|
||
var r = Math.sqrt(size / pi);
|
||
context.moveTo(r, 0);
|
||
context.arc(0, 0, r, 0, tau);
|
||
}
|
||
};
|
||
|
||
var cross = {
|
||
draw: function(context, size) {
|
||
var r = Math.sqrt(size / 5) / 2;
|
||
context.moveTo(-3 * r, -r);
|
||
context.lineTo(-r, -r);
|
||
context.lineTo(-r, -3 * r);
|
||
context.lineTo(r, -3 * r);
|
||
context.lineTo(r, -r);
|
||
context.lineTo(3 * r, -r);
|
||
context.lineTo(3 * r, r);
|
||
context.lineTo(r, r);
|
||
context.lineTo(r, 3 * r);
|
||
context.lineTo(-r, 3 * r);
|
||
context.lineTo(-r, r);
|
||
context.lineTo(-3 * r, r);
|
||
context.closePath();
|
||
}
|
||
};
|
||
|
||
var tan30 = Math.sqrt(1 / 3),
|
||
tan30_2 = tan30 * 2;
|
||
|
||
var diamond = {
|
||
draw: function(context, size) {
|
||
var y = Math.sqrt(size / tan30_2),
|
||
x = y * tan30;
|
||
context.moveTo(0, -y);
|
||
context.lineTo(x, 0);
|
||
context.lineTo(0, y);
|
||
context.lineTo(-x, 0);
|
||
context.closePath();
|
||
}
|
||
};
|
||
|
||
var ka = 0.89081309152928522810,
|
||
kr = Math.sin(pi / 10) / Math.sin(7 * pi / 10),
|
||
kx = Math.sin(tau / 10) * kr,
|
||
ky = -Math.cos(tau / 10) * kr;
|
||
|
||
var star = {
|
||
draw: function(context, size) {
|
||
var r = Math.sqrt(size * ka),
|
||
x = kx * r,
|
||
y = ky * r;
|
||
context.moveTo(0, -r);
|
||
context.lineTo(x, y);
|
||
for (var i = 1; i < 5; ++i) {
|
||
var a = tau * i / 5,
|
||
c = Math.cos(a),
|
||
s = Math.sin(a);
|
||
context.lineTo(s * r, -c * r);
|
||
context.lineTo(c * x - s * y, s * x + c * y);
|
||
}
|
||
context.closePath();
|
||
}
|
||
};
|
||
|
||
var square = {
|
||
draw: function(context, size) {
|
||
var w = Math.sqrt(size),
|
||
x = -w / 2;
|
||
context.rect(x, x, w, w);
|
||
}
|
||
};
|
||
|
||
var sqrt3 = Math.sqrt(3);
|
||
|
||
var triangle = {
|
||
draw: function(context, size) {
|
||
var y = -Math.sqrt(size / (sqrt3 * 3));
|
||
context.moveTo(0, y * 2);
|
||
context.lineTo(-sqrt3 * y, -y);
|
||
context.lineTo(sqrt3 * y, -y);
|
||
context.closePath();
|
||
}
|
||
};
|
||
|
||
var c = -0.5,
|
||
s = Math.sqrt(3) / 2,
|
||
k = 1 / Math.sqrt(12),
|
||
a = (k / 2 + 1) * 3;
|
||
|
||
var wye = {
|
||
draw: function(context, size) {
|
||
var r = Math.sqrt(size / a),
|
||
x0 = r / 2,
|
||
y0 = r * k,
|
||
x1 = x0,
|
||
y1 = r * k + r,
|
||
x2 = -x1,
|
||
y2 = y1;
|
||
context.moveTo(x0, y0);
|
||
context.lineTo(x1, y1);
|
||
context.lineTo(x2, y2);
|
||
context.lineTo(c * x0 - s * y0, s * x0 + c * y0);
|
||
context.lineTo(c * x1 - s * y1, s * x1 + c * y1);
|
||
context.lineTo(c * x2 - s * y2, s * x2 + c * y2);
|
||
context.lineTo(c * x0 + s * y0, c * y0 - s * x0);
|
||
context.lineTo(c * x1 + s * y1, c * y1 - s * x1);
|
||
context.lineTo(c * x2 + s * y2, c * y2 - s * x2);
|
||
context.closePath();
|
||
}
|
||
};
|
||
|
||
var symbols = [
|
||
circle,
|
||
cross,
|
||
diamond,
|
||
square,
|
||
star,
|
||
triangle,
|
||
wye
|
||
];
|
||
|
||
function symbol() {
|
||
var type = constant(circle),
|
||
size = constant(64),
|
||
context = null;
|
||
|
||
function symbol() {
|
||
var buffer;
|
||
if (!context) context = buffer = d3Path.path();
|
||
type.apply(this, arguments).draw(context, +size.apply(this, arguments));
|
||
if (buffer) return context = null, buffer + "" || null;
|
||
}
|
||
|
||
symbol.type = function(_) {
|
||
return arguments.length ? (type = typeof _ === "function" ? _ : constant(_), symbol) : type;
|
||
};
|
||
|
||
symbol.size = function(_) {
|
||
return arguments.length ? (size = typeof _ === "function" ? _ : constant(+_), symbol) : size;
|
||
};
|
||
|
||
symbol.context = function(_) {
|
||
return arguments.length ? (context = _ == null ? null : _, symbol) : context;
|
||
};
|
||
|
||
return symbol;
|
||
}
|
||
|
||
function noop() {}
|
||
|
||
function point(that, x, y) {
|
||
that._context.bezierCurveTo(
|
||
(2 * that._x0 + that._x1) / 3,
|
||
(2 * that._y0 + that._y1) / 3,
|
||
(that._x0 + 2 * that._x1) / 3,
|
||
(that._y0 + 2 * that._y1) / 3,
|
||
(that._x0 + 4 * that._x1 + x) / 6,
|
||
(that._y0 + 4 * that._y1 + y) / 6
|
||
);
|
||
}
|
||
|
||
function Basis(context) {
|
||
this._context = context;
|
||
}
|
||
|
||
Basis.prototype = {
|
||
areaStart: function() {
|
||
this._line = 0;
|
||
},
|
||
areaEnd: function() {
|
||
this._line = NaN;
|
||
},
|
||
lineStart: function() {
|
||
this._x0 = this._x1 =
|
||
this._y0 = this._y1 = NaN;
|
||
this._point = 0;
|
||
},
|
||
lineEnd: function() {
|
||
switch (this._point) {
|
||
case 3: point(this, this._x1, this._y1); // proceed
|
||
case 2: this._context.lineTo(this._x1, this._y1); break;
|
||
}
|
||
if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
|
||
this._line = 1 - this._line;
|
||
},
|
||
point: function(x, y) {
|
||
x = +x, y = +y;
|
||
switch (this._point) {
|
||
case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
|
||
case 1: this._point = 2; break;
|
||
case 2: this._point = 3; this._context.lineTo((5 * this._x0 + this._x1) / 6, (5 * this._y0 + this._y1) / 6); // proceed
|
||
default: point(this, x, y); break;
|
||
}
|
||
this._x0 = this._x1, this._x1 = x;
|
||
this._y0 = this._y1, this._y1 = y;
|
||
}
|
||
};
|
||
|
||
function basis(context) {
|
||
return new Basis(context);
|
||
}
|
||
|
||
function BasisClosed(context) {
|
||
this._context = context;
|
||
}
|
||
|
||
BasisClosed.prototype = {
|
||
areaStart: noop,
|
||
areaEnd: noop,
|
||
lineStart: function() {
|
||
this._x0 = this._x1 = this._x2 = this._x3 = this._x4 =
|
||
this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = NaN;
|
||
this._point = 0;
|
||
},
|
||
lineEnd: function() {
|
||
switch (this._point) {
|
||
case 1: {
|
||
this._context.moveTo(this._x2, this._y2);
|
||
this._context.closePath();
|
||
break;
|
||
}
|
||
case 2: {
|
||
this._context.moveTo((this._x2 + 2 * this._x3) / 3, (this._y2 + 2 * this._y3) / 3);
|
||
this._context.lineTo((this._x3 + 2 * this._x2) / 3, (this._y3 + 2 * this._y2) / 3);
|
||
this._context.closePath();
|
||
break;
|
||
}
|
||
case 3: {
|
||
this.point(this._x2, this._y2);
|
||
this.point(this._x3, this._y3);
|
||
this.point(this._x4, this._y4);
|
||
break;
|
||
}
|
||
}
|
||
},
|
||
point: function(x, y) {
|
||
x = +x, y = +y;
|
||
switch (this._point) {
|
||
case 0: this._point = 1; this._x2 = x, this._y2 = y; break;
|
||
case 1: this._point = 2; this._x3 = x, this._y3 = y; break;
|
||
case 2: this._point = 3; this._x4 = x, this._y4 = y; this._context.moveTo((this._x0 + 4 * this._x1 + x) / 6, (this._y0 + 4 * this._y1 + y) / 6); break;
|
||
default: point(this, x, y); break;
|
||
}
|
||
this._x0 = this._x1, this._x1 = x;
|
||
this._y0 = this._y1, this._y1 = y;
|
||
}
|
||
};
|
||
|
||
function basisClosed(context) {
|
||
return new BasisClosed(context);
|
||
}
|
||
|
||
function BasisOpen(context) {
|
||
this._context = context;
|
||
}
|
||
|
||
BasisOpen.prototype = {
|
||
areaStart: function() {
|
||
this._line = 0;
|
||
},
|
||
areaEnd: function() {
|
||
this._line = NaN;
|
||
},
|
||
lineStart: function() {
|
||
this._x0 = this._x1 =
|
||
this._y0 = this._y1 = NaN;
|
||
this._point = 0;
|
||
},
|
||
lineEnd: function() {
|
||
if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
|
||
this._line = 1 - this._line;
|
||
},
|
||
point: function(x, y) {
|
||
x = +x, y = +y;
|
||
switch (this._point) {
|
||
case 0: this._point = 1; break;
|
||
case 1: this._point = 2; break;
|
||
case 2: this._point = 3; var x0 = (this._x0 + 4 * this._x1 + x) / 6, y0 = (this._y0 + 4 * this._y1 + y) / 6; this._line ? this._context.lineTo(x0, y0) : this._context.moveTo(x0, y0); break;
|
||
case 3: this._point = 4; // proceed
|
||
default: point(this, x, y); break;
|
||
}
|
||
this._x0 = this._x1, this._x1 = x;
|
||
this._y0 = this._y1, this._y1 = y;
|
||
}
|
||
};
|
||
|
||
function basisOpen(context) {
|
||
return new BasisOpen(context);
|
||
}
|
||
|
||
function Bundle(context, beta) {
|
||
this._basis = new Basis(context);
|
||
this._beta = beta;
|
||
}
|
||
|
||
Bundle.prototype = {
|
||
lineStart: function() {
|
||
this._x = [];
|
||
this._y = [];
|
||
this._basis.lineStart();
|
||
},
|
||
lineEnd: function() {
|
||
var x = this._x,
|
||
y = this._y,
|
||
j = x.length - 1;
|
||
|
||
if (j > 0) {
|
||
var x0 = x[0],
|
||
y0 = y[0],
|
||
dx = x[j] - x0,
|
||
dy = y[j] - y0,
|
||
i = -1,
|
||
t;
|
||
|
||
while (++i <= j) {
|
||
t = i / j;
|
||
this._basis.point(
|
||
this._beta * x[i] + (1 - this._beta) * (x0 + t * dx),
|
||
this._beta * y[i] + (1 - this._beta) * (y0 + t * dy)
|
||
);
|
||
}
|
||
}
|
||
|
||
this._x = this._y = null;
|
||
this._basis.lineEnd();
|
||
},
|
||
point: function(x, y) {
|
||
this._x.push(+x);
|
||
this._y.push(+y);
|
||
}
|
||
};
|
||
|
||
var bundle = (function custom(beta) {
|
||
|
||
function bundle(context) {
|
||
return beta === 1 ? new Basis(context) : new Bundle(context, beta);
|
||
}
|
||
|
||
bundle.beta = function(beta) {
|
||
return custom(+beta);
|
||
};
|
||
|
||
return bundle;
|
||
})(0.85);
|
||
|
||
function point$1(that, x, y) {
|
||
that._context.bezierCurveTo(
|
||
that._x1 + that._k * (that._x2 - that._x0),
|
||
that._y1 + that._k * (that._y2 - that._y0),
|
||
that._x2 + that._k * (that._x1 - x),
|
||
that._y2 + that._k * (that._y1 - y),
|
||
that._x2,
|
||
that._y2
|
||
);
|
||
}
|
||
|
||
function Cardinal(context, tension) {
|
||
this._context = context;
|
||
this._k = (1 - tension) / 6;
|
||
}
|
||
|
||
Cardinal.prototype = {
|
||
areaStart: function() {
|
||
this._line = 0;
|
||
},
|
||
areaEnd: function() {
|
||
this._line = NaN;
|
||
},
|
||
lineStart: function() {
|
||
this._x0 = this._x1 = this._x2 =
|
||
this._y0 = this._y1 = this._y2 = NaN;
|
||
this._point = 0;
|
||
},
|
||
lineEnd: function() {
|
||
switch (this._point) {
|
||
case 2: this._context.lineTo(this._x2, this._y2); break;
|
||
case 3: point$1(this, this._x1, this._y1); break;
|
||
}
|
||
if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
|
||
this._line = 1 - this._line;
|
||
},
|
||
point: function(x, y) {
|
||
x = +x, y = +y;
|
||
switch (this._point) {
|
||
case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
|
||
case 1: this._point = 2; this._x1 = x, this._y1 = y; break;
|
||
case 2: this._point = 3; // proceed
|
||
default: point$1(this, x, y); break;
|
||
}
|
||
this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
|
||
this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
|
||
}
|
||
};
|
||
|
||
var cardinal = (function custom(tension) {
|
||
|
||
function cardinal(context) {
|
||
return new Cardinal(context, tension);
|
||
}
|
||
|
||
cardinal.tension = function(tension) {
|
||
return custom(+tension);
|
||
};
|
||
|
||
return cardinal;
|
||
})(0);
|
||
|
||
function CardinalClosed(context, tension) {
|
||
this._context = context;
|
||
this._k = (1 - tension) / 6;
|
||
}
|
||
|
||
CardinalClosed.prototype = {
|
||
areaStart: noop,
|
||
areaEnd: noop,
|
||
lineStart: function() {
|
||
this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
|
||
this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
|
||
this._point = 0;
|
||
},
|
||
lineEnd: function() {
|
||
switch (this._point) {
|
||
case 1: {
|
||
this._context.moveTo(this._x3, this._y3);
|
||
this._context.closePath();
|
||
break;
|
||
}
|
||
case 2: {
|
||
this._context.lineTo(this._x3, this._y3);
|
||
this._context.closePath();
|
||
break;
|
||
}
|
||
case 3: {
|
||
this.point(this._x3, this._y3);
|
||
this.point(this._x4, this._y4);
|
||
this.point(this._x5, this._y5);
|
||
break;
|
||
}
|
||
}
|
||
},
|
||
point: function(x, y) {
|
||
x = +x, y = +y;
|
||
switch (this._point) {
|
||
case 0: this._point = 1; this._x3 = x, this._y3 = y; break;
|
||
case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;
|
||
case 2: this._point = 3; this._x5 = x, this._y5 = y; break;
|
||
default: point$1(this, x, y); break;
|
||
}
|
||
this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
|
||
this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
|
||
}
|
||
};
|
||
|
||
var cardinalClosed = (function custom(tension) {
|
||
|
||
function cardinal(context) {
|
||
return new CardinalClosed(context, tension);
|
||
}
|
||
|
||
cardinal.tension = function(tension) {
|
||
return custom(+tension);
|
||
};
|
||
|
||
return cardinal;
|
||
})(0);
|
||
|
||
function CardinalOpen(context, tension) {
|
||
this._context = context;
|
||
this._k = (1 - tension) / 6;
|
||
}
|
||
|
||
CardinalOpen.prototype = {
|
||
areaStart: function() {
|
||
this._line = 0;
|
||
},
|
||
areaEnd: function() {
|
||
this._line = NaN;
|
||
},
|
||
lineStart: function() {
|
||
this._x0 = this._x1 = this._x2 =
|
||
this._y0 = this._y1 = this._y2 = NaN;
|
||
this._point = 0;
|
||
},
|
||
lineEnd: function() {
|
||
if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
|
||
this._line = 1 - this._line;
|
||
},
|
||
point: function(x, y) {
|
||
x = +x, y = +y;
|
||
switch (this._point) {
|
||
case 0: this._point = 1; break;
|
||
case 1: this._point = 2; break;
|
||
case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;
|
||
case 3: this._point = 4; // proceed
|
||
default: point$1(this, x, y); break;
|
||
}
|
||
this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
|
||
this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
|
||
}
|
||
};
|
||
|
||
var cardinalOpen = (function custom(tension) {
|
||
|
||
function cardinal(context) {
|
||
return new CardinalOpen(context, tension);
|
||
}
|
||
|
||
cardinal.tension = function(tension) {
|
||
return custom(+tension);
|
||
};
|
||
|
||
return cardinal;
|
||
})(0);
|
||
|
||
function point$2(that, x, y) {
|
||
var x1 = that._x1,
|
||
y1 = that._y1,
|
||
x2 = that._x2,
|
||
y2 = that._y2;
|
||
|
||
if (that._l01_a > epsilon) {
|
||
var a = 2 * that._l01_2a + 3 * that._l01_a * that._l12_a + that._l12_2a,
|
||
n = 3 * that._l01_a * (that._l01_a + that._l12_a);
|
||
x1 = (x1 * a - that._x0 * that._l12_2a + that._x2 * that._l01_2a) / n;
|
||
y1 = (y1 * a - that._y0 * that._l12_2a + that._y2 * that._l01_2a) / n;
|
||
}
|
||
|
||
if (that._l23_a > epsilon) {
|
||
var b = 2 * that._l23_2a + 3 * that._l23_a * that._l12_a + that._l12_2a,
|
||
m = 3 * that._l23_a * (that._l23_a + that._l12_a);
|
||
x2 = (x2 * b + that._x1 * that._l23_2a - x * that._l12_2a) / m;
|
||
y2 = (y2 * b + that._y1 * that._l23_2a - y * that._l12_2a) / m;
|
||
}
|
||
|
||
that._context.bezierCurveTo(x1, y1, x2, y2, that._x2, that._y2);
|
||
}
|
||
|
||
function CatmullRom(context, alpha) {
|
||
this._context = context;
|
||
this._alpha = alpha;
|
||
}
|
||
|
||
CatmullRom.prototype = {
|
||
areaStart: function() {
|
||
this._line = 0;
|
||
},
|
||
areaEnd: function() {
|
||
this._line = NaN;
|
||
},
|
||
lineStart: function() {
|
||
this._x0 = this._x1 = this._x2 =
|
||
this._y0 = this._y1 = this._y2 = NaN;
|
||
this._l01_a = this._l12_a = this._l23_a =
|
||
this._l01_2a = this._l12_2a = this._l23_2a =
|
||
this._point = 0;
|
||
},
|
||
lineEnd: function() {
|
||
switch (this._point) {
|
||
case 2: this._context.lineTo(this._x2, this._y2); break;
|
||
case 3: this.point(this._x2, this._y2); break;
|
||
}
|
||
if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
|
||
this._line = 1 - this._line;
|
||
},
|
||
point: function(x, y) {
|
||
x = +x, y = +y;
|
||
|
||
if (this._point) {
|
||
var x23 = this._x2 - x,
|
||
y23 = this._y2 - y;
|
||
this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
|
||
}
|
||
|
||
switch (this._point) {
|
||
case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
|
||
case 1: this._point = 2; break;
|
||
case 2: this._point = 3; // proceed
|
||
default: point$2(this, x, y); break;
|
||
}
|
||
|
||
this._l01_a = this._l12_a, this._l12_a = this._l23_a;
|
||
this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
|
||
this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
|
||
this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
|
||
}
|
||
};
|
||
|
||
var catmullRom = (function custom(alpha) {
|
||
|
||
function catmullRom(context) {
|
||
return alpha ? new CatmullRom(context, alpha) : new Cardinal(context, 0);
|
||
}
|
||
|
||
catmullRom.alpha = function(alpha) {
|
||
return custom(+alpha);
|
||
};
|
||
|
||
return catmullRom;
|
||
})(0.5);
|
||
|
||
function CatmullRomClosed(context, alpha) {
|
||
this._context = context;
|
||
this._alpha = alpha;
|
||
}
|
||
|
||
CatmullRomClosed.prototype = {
|
||
areaStart: noop,
|
||
areaEnd: noop,
|
||
lineStart: function() {
|
||
this._x0 = this._x1 = this._x2 = this._x3 = this._x4 = this._x5 =
|
||
this._y0 = this._y1 = this._y2 = this._y3 = this._y4 = this._y5 = NaN;
|
||
this._l01_a = this._l12_a = this._l23_a =
|
||
this._l01_2a = this._l12_2a = this._l23_2a =
|
||
this._point = 0;
|
||
},
|
||
lineEnd: function() {
|
||
switch (this._point) {
|
||
case 1: {
|
||
this._context.moveTo(this._x3, this._y3);
|
||
this._context.closePath();
|
||
break;
|
||
}
|
||
case 2: {
|
||
this._context.lineTo(this._x3, this._y3);
|
||
this._context.closePath();
|
||
break;
|
||
}
|
||
case 3: {
|
||
this.point(this._x3, this._y3);
|
||
this.point(this._x4, this._y4);
|
||
this.point(this._x5, this._y5);
|
||
break;
|
||
}
|
||
}
|
||
},
|
||
point: function(x, y) {
|
||
x = +x, y = +y;
|
||
|
||
if (this._point) {
|
||
var x23 = this._x2 - x,
|
||
y23 = this._y2 - y;
|
||
this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
|
||
}
|
||
|
||
switch (this._point) {
|
||
case 0: this._point = 1; this._x3 = x, this._y3 = y; break;
|
||
case 1: this._point = 2; this._context.moveTo(this._x4 = x, this._y4 = y); break;
|
||
case 2: this._point = 3; this._x5 = x, this._y5 = y; break;
|
||
default: point$2(this, x, y); break;
|
||
}
|
||
|
||
this._l01_a = this._l12_a, this._l12_a = this._l23_a;
|
||
this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
|
||
this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
|
||
this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
|
||
}
|
||
};
|
||
|
||
var catmullRomClosed = (function custom(alpha) {
|
||
|
||
function catmullRom(context) {
|
||
return alpha ? new CatmullRomClosed(context, alpha) : new CardinalClosed(context, 0);
|
||
}
|
||
|
||
catmullRom.alpha = function(alpha) {
|
||
return custom(+alpha);
|
||
};
|
||
|
||
return catmullRom;
|
||
})(0.5);
|
||
|
||
function CatmullRomOpen(context, alpha) {
|
||
this._context = context;
|
||
this._alpha = alpha;
|
||
}
|
||
|
||
CatmullRomOpen.prototype = {
|
||
areaStart: function() {
|
||
this._line = 0;
|
||
},
|
||
areaEnd: function() {
|
||
this._line = NaN;
|
||
},
|
||
lineStart: function() {
|
||
this._x0 = this._x1 = this._x2 =
|
||
this._y0 = this._y1 = this._y2 = NaN;
|
||
this._l01_a = this._l12_a = this._l23_a =
|
||
this._l01_2a = this._l12_2a = this._l23_2a =
|
||
this._point = 0;
|
||
},
|
||
lineEnd: function() {
|
||
if (this._line || (this._line !== 0 && this._point === 3)) this._context.closePath();
|
||
this._line = 1 - this._line;
|
||
},
|
||
point: function(x, y) {
|
||
x = +x, y = +y;
|
||
|
||
if (this._point) {
|
||
var x23 = this._x2 - x,
|
||
y23 = this._y2 - y;
|
||
this._l23_a = Math.sqrt(this._l23_2a = Math.pow(x23 * x23 + y23 * y23, this._alpha));
|
||
}
|
||
|
||
switch (this._point) {
|
||
case 0: this._point = 1; break;
|
||
case 1: this._point = 2; break;
|
||
case 2: this._point = 3; this._line ? this._context.lineTo(this._x2, this._y2) : this._context.moveTo(this._x2, this._y2); break;
|
||
case 3: this._point = 4; // proceed
|
||
default: point$2(this, x, y); break;
|
||
}
|
||
|
||
this._l01_a = this._l12_a, this._l12_a = this._l23_a;
|
||
this._l01_2a = this._l12_2a, this._l12_2a = this._l23_2a;
|
||
this._x0 = this._x1, this._x1 = this._x2, this._x2 = x;
|
||
this._y0 = this._y1, this._y1 = this._y2, this._y2 = y;
|
||
}
|
||
};
|
||
|
||
var catmullRomOpen = (function custom(alpha) {
|
||
|
||
function catmullRom(context) {
|
||
return alpha ? new CatmullRomOpen(context, alpha) : new CardinalOpen(context, 0);
|
||
}
|
||
|
||
catmullRom.alpha = function(alpha) {
|
||
return custom(+alpha);
|
||
};
|
||
|
||
return catmullRom;
|
||
})(0.5);
|
||
|
||
function LinearClosed(context) {
|
||
this._context = context;
|
||
}
|
||
|
||
LinearClosed.prototype = {
|
||
areaStart: noop,
|
||
areaEnd: noop,
|
||
lineStart: function() {
|
||
this._point = 0;
|
||
},
|
||
lineEnd: function() {
|
||
if (this._point) this._context.closePath();
|
||
},
|
||
point: function(x, y) {
|
||
x = +x, y = +y;
|
||
if (this._point) this._context.lineTo(x, y);
|
||
else this._point = 1, this._context.moveTo(x, y);
|
||
}
|
||
};
|
||
|
||
function linearClosed(context) {
|
||
return new LinearClosed(context);
|
||
}
|
||
|
||
function sign(x) {
|
||
return x < 0 ? -1 : 1;
|
||
}
|
||
|
||
// Calculate the slopes of the tangents (Hermite-type interpolation) based on
|
||
// the following paper: Steffen, M. 1990. A Simple Method for Monotonic
|
||
// Interpolation in One Dimension. Astronomy and Astrophysics, Vol. 239, NO.
|
||
// NOV(II), P. 443, 1990.
|
||
function slope3(that, x2, y2) {
|
||
var h0 = that._x1 - that._x0,
|
||
h1 = x2 - that._x1,
|
||
s0 = (that._y1 - that._y0) / (h0 || h1 < 0 && -0),
|
||
s1 = (y2 - that._y1) / (h1 || h0 < 0 && -0),
|
||
p = (s0 * h1 + s1 * h0) / (h0 + h1);
|
||
return (sign(s0) + sign(s1)) * Math.min(Math.abs(s0), Math.abs(s1), 0.5 * Math.abs(p)) || 0;
|
||
}
|
||
|
||
// Calculate a one-sided slope.
|
||
function slope2(that, t) {
|
||
var h = that._x1 - that._x0;
|
||
return h ? (3 * (that._y1 - that._y0) / h - t) / 2 : t;
|
||
}
|
||
|
||
// According to https://en.wikipedia.org/wiki/Cubic_Hermite_spline#Representations
|
||
// "you can express cubic Hermite interpolation in terms of cubic Bézier curves
|
||
// with respect to the four values p0, p0 + m0 / 3, p1 - m1 / 3, p1".
|
||
function point$3(that, t0, t1) {
|
||
var x0 = that._x0,
|
||
y0 = that._y0,
|
||
x1 = that._x1,
|
||
y1 = that._y1,
|
||
dx = (x1 - x0) / 3;
|
||
that._context.bezierCurveTo(x0 + dx, y0 + dx * t0, x1 - dx, y1 - dx * t1, x1, y1);
|
||
}
|
||
|
||
function MonotoneX(context) {
|
||
this._context = context;
|
||
}
|
||
|
||
MonotoneX.prototype = {
|
||
areaStart: function() {
|
||
this._line = 0;
|
||
},
|
||
areaEnd: function() {
|
||
this._line = NaN;
|
||
},
|
||
lineStart: function() {
|
||
this._x0 = this._x1 =
|
||
this._y0 = this._y1 =
|
||
this._t0 = NaN;
|
||
this._point = 0;
|
||
},
|
||
lineEnd: function() {
|
||
switch (this._point) {
|
||
case 2: this._context.lineTo(this._x1, this._y1); break;
|
||
case 3: point$3(this, this._t0, slope2(this, this._t0)); break;
|
||
}
|
||
if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
|
||
this._line = 1 - this._line;
|
||
},
|
||
point: function(x, y) {
|
||
var t1 = NaN;
|
||
|
||
x = +x, y = +y;
|
||
if (x === this._x1 && y === this._y1) return; // Ignore coincident points.
|
||
switch (this._point) {
|
||
case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
|
||
case 1: this._point = 2; break;
|
||
case 2: this._point = 3; point$3(this, slope2(this, t1 = slope3(this, x, y)), t1); break;
|
||
default: point$3(this, this._t0, t1 = slope3(this, x, y)); break;
|
||
}
|
||
|
||
this._x0 = this._x1, this._x1 = x;
|
||
this._y0 = this._y1, this._y1 = y;
|
||
this._t0 = t1;
|
||
}
|
||
};
|
||
|
||
function MonotoneY(context) {
|
||
this._context = new ReflectContext(context);
|
||
}
|
||
|
||
(MonotoneY.prototype = Object.create(MonotoneX.prototype)).point = function(x, y) {
|
||
MonotoneX.prototype.point.call(this, y, x);
|
||
};
|
||
|
||
function ReflectContext(context) {
|
||
this._context = context;
|
||
}
|
||
|
||
ReflectContext.prototype = {
|
||
moveTo: function(x, y) { this._context.moveTo(y, x); },
|
||
closePath: function() { this._context.closePath(); },
|
||
lineTo: function(x, y) { this._context.lineTo(y, x); },
|
||
bezierCurveTo: function(x1, y1, x2, y2, x, y) { this._context.bezierCurveTo(y1, x1, y2, x2, y, x); }
|
||
};
|
||
|
||
function monotoneX(context) {
|
||
return new MonotoneX(context);
|
||
}
|
||
|
||
function monotoneY(context) {
|
||
return new MonotoneY(context);
|
||
}
|
||
|
||
function Natural(context) {
|
||
this._context = context;
|
||
}
|
||
|
||
Natural.prototype = {
|
||
areaStart: function() {
|
||
this._line = 0;
|
||
},
|
||
areaEnd: function() {
|
||
this._line = NaN;
|
||
},
|
||
lineStart: function() {
|
||
this._x = [];
|
||
this._y = [];
|
||
},
|
||
lineEnd: function() {
|
||
var x = this._x,
|
||
y = this._y,
|
||
n = x.length;
|
||
|
||
if (n) {
|
||
this._line ? this._context.lineTo(x[0], y[0]) : this._context.moveTo(x[0], y[0]);
|
||
if (n === 2) {
|
||
this._context.lineTo(x[1], y[1]);
|
||
} else {
|
||
var px = controlPoints(x),
|
||
py = controlPoints(y);
|
||
for (var i0 = 0, i1 = 1; i1 < n; ++i0, ++i1) {
|
||
this._context.bezierCurveTo(px[0][i0], py[0][i0], px[1][i0], py[1][i0], x[i1], y[i1]);
|
||
}
|
||
}
|
||
}
|
||
|
||
if (this._line || (this._line !== 0 && n === 1)) this._context.closePath();
|
||
this._line = 1 - this._line;
|
||
this._x = this._y = null;
|
||
},
|
||
point: function(x, y) {
|
||
this._x.push(+x);
|
||
this._y.push(+y);
|
||
}
|
||
};
|
||
|
||
// See https://www.particleincell.com/2012/bezier-splines/ for derivation.
|
||
function controlPoints(x) {
|
||
var i,
|
||
n = x.length - 1,
|
||
m,
|
||
a = new Array(n),
|
||
b = new Array(n),
|
||
r = new Array(n);
|
||
a[0] = 0, b[0] = 2, r[0] = x[0] + 2 * x[1];
|
||
for (i = 1; i < n - 1; ++i) a[i] = 1, b[i] = 4, r[i] = 4 * x[i] + 2 * x[i + 1];
|
||
a[n - 1] = 2, b[n - 1] = 7, r[n - 1] = 8 * x[n - 1] + x[n];
|
||
for (i = 1; i < n; ++i) m = a[i] / b[i - 1], b[i] -= m, r[i] -= m * r[i - 1];
|
||
a[n - 1] = r[n - 1] / b[n - 1];
|
||
for (i = n - 2; i >= 0; --i) a[i] = (r[i] - a[i + 1]) / b[i];
|
||
b[n - 1] = (x[n] + a[n - 1]) / 2;
|
||
for (i = 0; i < n - 1; ++i) b[i] = 2 * x[i + 1] - a[i + 1];
|
||
return [a, b];
|
||
}
|
||
|
||
function natural(context) {
|
||
return new Natural(context);
|
||
}
|
||
|
||
function Step(context, t) {
|
||
this._context = context;
|
||
this._t = t;
|
||
}
|
||
|
||
Step.prototype = {
|
||
areaStart: function() {
|
||
this._line = 0;
|
||
},
|
||
areaEnd: function() {
|
||
this._line = NaN;
|
||
},
|
||
lineStart: function() {
|
||
this._x = this._y = NaN;
|
||
this._point = 0;
|
||
},
|
||
lineEnd: function() {
|
||
if (0 < this._t && this._t < 1 && this._point === 2) this._context.lineTo(this._x, this._y);
|
||
if (this._line || (this._line !== 0 && this._point === 1)) this._context.closePath();
|
||
if (this._line >= 0) this._t = 1 - this._t, this._line = 1 - this._line;
|
||
},
|
||
point: function(x, y) {
|
||
x = +x, y = +y;
|
||
switch (this._point) {
|
||
case 0: this._point = 1; this._line ? this._context.lineTo(x, y) : this._context.moveTo(x, y); break;
|
||
case 1: this._point = 2; // proceed
|
||
default: {
|
||
if (this._t <= 0) {
|
||
this._context.lineTo(this._x, y);
|
||
this._context.lineTo(x, y);
|
||
} else {
|
||
var x1 = this._x * (1 - this._t) + x * this._t;
|
||
this._context.lineTo(x1, this._y);
|
||
this._context.lineTo(x1, y);
|
||
}
|
||
break;
|
||
}
|
||
}
|
||
this._x = x, this._y = y;
|
||
}
|
||
};
|
||
|
||
function step(context) {
|
||
return new Step(context, 0.5);
|
||
}
|
||
|
||
function stepBefore(context) {
|
||
return new Step(context, 0);
|
||
}
|
||
|
||
function stepAfter(context) {
|
||
return new Step(context, 1);
|
||
}
|
||
|
||
function none(series, order) {
|
||
if (!((n = series.length) > 1)) return;
|
||
for (var i = 1, j, s0, s1 = series[order[0]], n, m = s1.length; i < n; ++i) {
|
||
s0 = s1, s1 = series[order[i]];
|
||
for (j = 0; j < m; ++j) {
|
||
s1[j][1] += s1[j][0] = isNaN(s0[j][1]) ? s0[j][0] : s0[j][1];
|
||
}
|
||
}
|
||
}
|
||
|
||
function none$1(series) {
|
||
var n = series.length, o = new Array(n);
|
||
while (--n >= 0) o[n] = n;
|
||
return o;
|
||
}
|
||
|
||
function stackValue(d, key) {
|
||
return d[key];
|
||
}
|
||
|
||
function stack() {
|
||
var keys = constant([]),
|
||
order = none$1,
|
||
offset = none,
|
||
value = stackValue;
|
||
|
||
function stack(data) {
|
||
var kz = keys.apply(this, arguments),
|
||
i,
|
||
m = data.length,
|
||
n = kz.length,
|
||
sz = new Array(n),
|
||
oz;
|
||
|
||
for (i = 0; i < n; ++i) {
|
||
for (var ki = kz[i], si = sz[i] = new Array(m), j = 0, sij; j < m; ++j) {
|
||
si[j] = sij = [0, +value(data[j], ki, j, data)];
|
||
sij.data = data[j];
|
||
}
|
||
si.key = ki;
|
||
}
|
||
|
||
for (i = 0, oz = order(sz); i < n; ++i) {
|
||
sz[oz[i]].index = i;
|
||
}
|
||
|
||
offset(sz, oz);
|
||
return sz;
|
||
}
|
||
|
||
stack.keys = function(_) {
|
||
return arguments.length ? (keys = typeof _ === "function" ? _ : constant(slice.call(_)), stack) : keys;
|
||
};
|
||
|
||
stack.value = function(_) {
|
||
return arguments.length ? (value = typeof _ === "function" ? _ : constant(+_), stack) : value;
|
||
};
|
||
|
||
stack.order = function(_) {
|
||
return arguments.length ? (order = _ == null ? none$1 : typeof _ === "function" ? _ : constant(slice.call(_)), stack) : order;
|
||
};
|
||
|
||
stack.offset = function(_) {
|
||
return arguments.length ? (offset = _ == null ? none : _, stack) : offset;
|
||
};
|
||
|
||
return stack;
|
||
}
|
||
|
||
function expand(series, order) {
|
||
if (!((n = series.length) > 0)) return;
|
||
for (var i, n, j = 0, m = series[0].length, y; j < m; ++j) {
|
||
for (y = i = 0; i < n; ++i) y += series[i][j][1] || 0;
|
||
if (y) for (i = 0; i < n; ++i) series[i][j][1] /= y;
|
||
}
|
||
none(series, order);
|
||
}
|
||
|
||
function diverging(series, order) {
|
||
if (!((n = series.length) > 0)) return;
|
||
for (var i, j = 0, d, dy, yp, yn, n, m = series[order[0]].length; j < m; ++j) {
|
||
for (yp = yn = 0, i = 0; i < n; ++i) {
|
||
if ((dy = (d = series[order[i]][j])[1] - d[0]) > 0) {
|
||
d[0] = yp, d[1] = yp += dy;
|
||
} else if (dy < 0) {
|
||
d[1] = yn, d[0] = yn += dy;
|
||
} else {
|
||
d[0] = 0, d[1] = dy;
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
function silhouette(series, order) {
|
||
if (!((n = series.length) > 0)) return;
|
||
for (var j = 0, s0 = series[order[0]], n, m = s0.length; j < m; ++j) {
|
||
for (var i = 0, y = 0; i < n; ++i) y += series[i][j][1] || 0;
|
||
s0[j][1] += s0[j][0] = -y / 2;
|
||
}
|
||
none(series, order);
|
||
}
|
||
|
||
function wiggle(series, order) {
|
||
if (!((n = series.length) > 0) || !((m = (s0 = series[order[0]]).length) > 0)) return;
|
||
for (var y = 0, j = 1, s0, m, n; j < m; ++j) {
|
||
for (var i = 0, s1 = 0, s2 = 0; i < n; ++i) {
|
||
var si = series[order[i]],
|
||
sij0 = si[j][1] || 0,
|
||
sij1 = si[j - 1][1] || 0,
|
||
s3 = (sij0 - sij1) / 2;
|
||
for (var k = 0; k < i; ++k) {
|
||
var sk = series[order[k]],
|
||
skj0 = sk[j][1] || 0,
|
||
skj1 = sk[j - 1][1] || 0;
|
||
s3 += skj0 - skj1;
|
||
}
|
||
s1 += sij0, s2 += s3 * sij0;
|
||
}
|
||
s0[j - 1][1] += s0[j - 1][0] = y;
|
||
if (s1) y -= s2 / s1;
|
||
}
|
||
s0[j - 1][1] += s0[j - 1][0] = y;
|
||
none(series, order);
|
||
}
|
||
|
||
function appearance(series) {
|
||
var peaks = series.map(peak);
|
||
return none$1(series).sort(function(a, b) { return peaks[a] - peaks[b]; });
|
||
}
|
||
|
||
function peak(series) {
|
||
var i = -1, j = 0, n = series.length, vi, vj = -Infinity;
|
||
while (++i < n) if ((vi = +series[i][1]) > vj) vj = vi, j = i;
|
||
return j;
|
||
}
|
||
|
||
function ascending(series) {
|
||
var sums = series.map(sum);
|
||
return none$1(series).sort(function(a, b) { return sums[a] - sums[b]; });
|
||
}
|
||
|
||
function sum(series) {
|
||
var s = 0, i = -1, n = series.length, v;
|
||
while (++i < n) if (v = +series[i][1]) s += v;
|
||
return s;
|
||
}
|
||
|
||
function descending$1(series) {
|
||
return ascending(series).reverse();
|
||
}
|
||
|
||
function insideOut(series) {
|
||
var n = series.length,
|
||
i,
|
||
j,
|
||
sums = series.map(sum),
|
||
order = appearance(series),
|
||
top = 0,
|
||
bottom = 0,
|
||
tops = [],
|
||
bottoms = [];
|
||
|
||
for (i = 0; i < n; ++i) {
|
||
j = order[i];
|
||
if (top < bottom) {
|
||
top += sums[j];
|
||
tops.push(j);
|
||
} else {
|
||
bottom += sums[j];
|
||
bottoms.push(j);
|
||
}
|
||
}
|
||
|
||
return bottoms.reverse().concat(tops);
|
||
}
|
||
|
||
function reverse(series) {
|
||
return none$1(series).reverse();
|
||
}
|
||
|
||
exports.arc = arc;
|
||
exports.area = area;
|
||
exports.areaRadial = areaRadial;
|
||
exports.curveBasis = basis;
|
||
exports.curveBasisClosed = basisClosed;
|
||
exports.curveBasisOpen = basisOpen;
|
||
exports.curveBundle = bundle;
|
||
exports.curveCardinal = cardinal;
|
||
exports.curveCardinalClosed = cardinalClosed;
|
||
exports.curveCardinalOpen = cardinalOpen;
|
||
exports.curveCatmullRom = catmullRom;
|
||
exports.curveCatmullRomClosed = catmullRomClosed;
|
||
exports.curveCatmullRomOpen = catmullRomOpen;
|
||
exports.curveLinear = curveLinear;
|
||
exports.curveLinearClosed = linearClosed;
|
||
exports.curveMonotoneX = monotoneX;
|
||
exports.curveMonotoneY = monotoneY;
|
||
exports.curveNatural = natural;
|
||
exports.curveStep = step;
|
||
exports.curveStepAfter = stepAfter;
|
||
exports.curveStepBefore = stepBefore;
|
||
exports.line = line;
|
||
exports.lineRadial = lineRadial$1;
|
||
exports.linkHorizontal = linkHorizontal;
|
||
exports.linkRadial = linkRadial;
|
||
exports.linkVertical = linkVertical;
|
||
exports.pie = pie;
|
||
exports.pointRadial = pointRadial;
|
||
exports.radialArea = areaRadial;
|
||
exports.radialLine = lineRadial$1;
|
||
exports.stack = stack;
|
||
exports.stackOffsetDiverging = diverging;
|
||
exports.stackOffsetExpand = expand;
|
||
exports.stackOffsetNone = none;
|
||
exports.stackOffsetSilhouette = silhouette;
|
||
exports.stackOffsetWiggle = wiggle;
|
||
exports.stackOrderAppearance = appearance;
|
||
exports.stackOrderAscending = ascending;
|
||
exports.stackOrderDescending = descending$1;
|
||
exports.stackOrderInsideOut = insideOut;
|
||
exports.stackOrderNone = none$1;
|
||
exports.stackOrderReverse = reverse;
|
||
exports.symbol = symbol;
|
||
exports.symbolCircle = circle;
|
||
exports.symbolCross = cross;
|
||
exports.symbolDiamond = diamond;
|
||
exports.symbolSquare = square;
|
||
exports.symbolStar = star;
|
||
exports.symbolTriangle = triangle;
|
||
exports.symbolWye = wye;
|
||
exports.symbols = symbols;
|
||
|
||
Object.defineProperty(exports, '__esModule', { value: true });
|
||
|
||
}));
|