"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = _default;
var _index = require("../../../lib-vendor/d3-path/src/index.js");
var _constant = _interopRequireDefault(require("./constant.js"));
var _math = require("./math.js");
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
function arcInnerRadius(d) {
return d.innerRadius;
}
function arcOuterRadius(d) {
return d.outerRadius;
}
function arcStartAngle(d) {
return d.startAngle;
}
function arcEndAngle(d) {
return d.endAngle;
}
function arcPadAngle(d) {
return d && d.padAngle; // Note: optional!
}
function intersect(x0, y0, x1, y1, x2, y2, x3, y3) {
var x10 = x1 - x0,
y10 = y1 - y0,
x32 = x3 - x2,
y32 = y3 - y2,
t = y32 * x10 - x32 * y10;
if (t * t < _math.epsilon) return;
t = (x32 * (y0 - y2) - y32 * (x0 - x2)) / t;
return [x0 + t * x10, y0 + t * y10];
}
// Compute perpendicular offset line of length rc.
// http://mathworld.wolfram.com/Circle-LineIntersection.html
function cornerTangents(x0, y0, x1, y1, r1, rc, cw) {
var x01 = x0 - x1,
y01 = y0 - y1,
lo = (cw ? rc : -rc) / (0, _math.sqrt)(x01 * x01 + y01 * y01),
ox = lo * y01,
oy = -lo * x01,
x11 = x0 + ox,
y11 = y0 + oy,
x10 = x1 + ox,
y10 = y1 + oy,
x00 = (x11 + x10) / 2,
y00 = (y11 + y10) / 2,
dx = x10 - x11,
dy = y10 - y11,
d2 = dx * dx + dy * dy,
r = r1 - rc,
D = x11 * y10 - x10 * y11,
d = (dy < 0 ? -1 : 1) * (0, _math.sqrt)((0, _math.max)(0, r * r * d2 - D * D)),
cx0 = (D * dy - dx * d) / d2,
cy0 = (-D * dx - dy * d) / d2,
cx1 = (D * dy + dx * d) / d2,
cy1 = (-D * dx + dy * d) / d2,
dx0 = cx0 - x00,
dy0 = cy0 - y00,
dx1 = cx1 - x00,
dy1 = cy1 - y00;
// Pick the closer of the two intersection points.
// TODO Is there a faster way to determine which intersection to use?
if (dx0 * dx0 + dy0 * dy0 > dx1 * dx1 + dy1 * dy1) cx0 = cx1, cy0 = cy1;
return {
cx: cx0,
cy: cy0,
x01: -ox,
y01: -oy,
x11: cx0 * (r1 / r - 1),
y11: cy0 * (r1 / r - 1)
};
}
function _default() {
var innerRadius = arcInnerRadius,
outerRadius = arcOuterRadius,
cornerRadius = (0, _constant.default)(0),
padRadius = null,
startAngle = arcStartAngle,
endAngle = arcEndAngle,
padAngle = arcPadAngle,
context = null;
function arc() {
var buffer,
r,
r0 = +innerRadius.apply(this, arguments),
r1 = +outerRadius.apply(this, arguments),
a0 = startAngle.apply(this, arguments) - _math.halfPi,
a1 = endAngle.apply(this, arguments) - _math.halfPi,
da = (0, _math.abs)(a1 - a0),
cw = a1 > a0;
if (!context) context = buffer = (0, _index.path)();
// Ensure that the outer radius is always larger than the inner radius.
if (r1 < r0) r = r1, r1 = r0, r0 = r;
// Is it a point?
if (!(r1 > _math.epsilon)) context.moveTo(0, 0);
// Or is it a circle or annulus?
else if (da > _math.tau - _math.epsilon) {
context.moveTo(r1 * (0, _math.cos)(a0), r1 * (0, _math.sin)(a0));
context.arc(0, 0, r1, a0, a1, !cw);
if (r0 > _math.epsilon) {
context.moveTo(r0 * (0, _math.cos)(a1), r0 * (0, _math.sin)(a1));
context.arc(0, 0, r0, a1, a0, cw);
}
}
// Or is it a circular or annular sector?
else {
var a01 = a0,
a11 = a1,
a00 = a0,
a10 = a1,
da0 = da,
da1 = da,
ap = padAngle.apply(this, arguments) / 2,
rp = ap > _math.epsilon && (padRadius ? +padRadius.apply(this, arguments) : (0, _math.sqrt)(r0 * r0 + r1 * r1)),
rc = (0, _math.min)((0, _math.abs)(r1 - r0) / 2, +cornerRadius.apply(this, arguments)),
rc0 = rc,
rc1 = rc,
t0,
t1;
// Apply padding? Note that since r1 ≥ r0, da1 ≥ da0.
if (rp > _math.epsilon) {
var p0 = (0, _math.asin)(rp / r0 * (0, _math.sin)(ap)),
p1 = (0, _math.asin)(rp / r1 * (0, _math.sin)(ap));
if ((da0 -= p0 * 2) > _math.epsilon) p0 *= cw ? 1 : -1, a00 += p0, a10 -= p0;else da0 = 0, a00 = a10 = (a0 + a1) / 2;
if ((da1 -= p1 * 2) > _math.epsilon) p1 *= cw ? 1 : -1, a01 += p1, a11 -= p1;else da1 = 0, a01 = a11 = (a0 + a1) / 2;
}
var x01 = r1 * (0, _math.cos)(a01),
y01 = r1 * (0, _math.sin)(a01),
x10 = r0 * (0, _math.cos)(a10),
y10 = r0 * (0, _math.sin)(a10);
// Apply rounded corners?
if (rc > _math.epsilon) {
var x11 = r1 * (0, _math.cos)(a11),
y11 = r1 * (0, _math.sin)(a11),
x00 = r0 * (0, _math.cos)(a00),
y00 = r0 * (0, _math.sin)(a00),
oc;
// Restrict the corner radius according to the sector angle.
if (da < _math.pi && (oc = intersect(x01, y01, x00, y00, x11, y11, x10, y10))) {
var ax = x01 - oc[0],
ay = y01 - oc[1],
bx = x11 - oc[0],
by = y11 - oc[1],
kc = 1 / (0, _math.sin)((0, _math.acos)((ax * bx + ay * by) / ((0, _math.sqrt)(ax * ax + ay * ay) * (0, _math.sqrt)(bx * bx + by * by))) / 2),
lc = (0, _math.sqrt)(oc[0] * oc[0] + oc[1] * oc[1]);
rc0 = (0, _math.min)(rc, (r0 - lc) / (kc - 1));
rc1 = (0, _math.min)(rc, (r1 - lc) / (kc + 1));
}
}
// Is the sector collapsed to a line?
if (!(da1 > _math.epsilon)) context.moveTo(x01, y01);
// Does the sector’s outer ring have rounded corners?
else if (rc1 > _math.epsilon) {
t0 = cornerTangents(x00, y00, x01, y01, r1, rc1, cw);
t1 = cornerTangents(x11, y11, x10, y10, r1, rc1, cw);
context.moveTo(t0.cx + t0.x01, t0.cy + t0.y01);
// Have the corners merged?
if (rc1 < rc) context.arc(t0.cx, t0.cy, rc1, (0, _math.atan2)(t0.y01, t0.x01), (0, _math.atan2)(t1.y01, t1.x01), !cw);
// Otherwise, draw the two corners and the ring.
else {
context.arc(t0.cx, t0.cy, rc1, (0, _math.atan2)(t0.y01, t0.x01), (0, _math.atan2)(t0.y11, t0.x11), !cw);
context.arc(0, 0, r1, (0, _math.atan2)(t0.cy + t0.y11, t0.cx + t0.x11), (0, _math.atan2)(t1.cy + t1.y11, t1.cx + t1.x11), !cw);
context.arc(t1.cx, t1.cy, rc1, (0, _math.atan2)(t1.y11, t1.x11), (0, _math.atan2)(t1.y01, t1.x01), !cw);
}
}
// Or is the outer ring just a circular arc?
else context.moveTo(x01, y01), context.arc(0, 0, r1, a01, a11, !cw);
// Is there no inner ring, and it’s a circular sector?
// Or perhaps it’s an annular sector collapsed due to padding?
if (!(r0 > _math.epsilon) || !(da0 > _math.epsilon)) context.lineTo(x10, y10);
// Does the sector’s inner ring (or point) have rounded corners?
else if (rc0 > _math.epsilon) {
t0 = cornerTangents(x10, y10, x11, y11, r0, -rc0, cw);
t1 = cornerTangents(x01, y01, x00, y00, r0, -rc0, cw);
context.lineTo(t0.cx + t0.x01, t0.cy + t0.y01);
// Have the corners merged?
if (rc0 < rc) context.arc(t0.cx, t0.cy, rc0, (0, _math.atan2)(t0.y01, t0.x01), (0, _math.atan2)(t1.y01, t1.x01), !cw);
// Otherwise, draw the two corners and the ring.
else {
context.arc(t0.cx, t0.cy, rc0, (0, _math.atan2)(t0.y01, t0.x01), (0, _math.atan2)(t0.y11, t0.x11), !cw);
context.arc(0, 0, r0, (0, _math.atan2)(t0.cy + t0.y11, t0.cx + t0.x11), (0, _math.atan2)(t1.cy + t1.y11, t1.cx + t1.x11), cw);
context.arc(t1.cx, t1.cy, rc0, (0, _math.atan2)(t1.y11, t1.x11), (0, _math.atan2)(t1.y01, t1.x01), !cw);
}
}
// Or is the inner ring just a circular arc?
else context.arc(0, 0, r0, a10, a00, cw);
}
context.closePath();
if (buffer) return context = null, buffer + "" || null;
}
arc.centroid = function () {
var r = (+innerRadius.apply(this, arguments) + +outerRadius.apply(this, arguments)) / 2,
a = (+startAngle.apply(this, arguments) + +endAngle.apply(this, arguments)) / 2 - _math.pi / 2;
return [(0, _math.cos)(a) * r, (0, _math.sin)(a) * r];
};
arc.innerRadius = function (_) {
return arguments.length ? (innerRadius = typeof _ === "function" ? _ : (0, _constant.default)(+_), arc) : innerRadius;
};
arc.outerRadius = function (_) {
return arguments.length ? (outerRadius = typeof _ === "function" ? _ : (0, _constant.default)(+_), arc) : outerRadius;
};
arc.cornerRadius = function (_) {
return arguments.length ? (cornerRadius = typeof _ === "function" ? _ : (0, _constant.default)(+_), arc) : cornerRadius;
};
arc.padRadius = function (_) {
return arguments.length ? (padRadius = _ == null ? null : typeof _ === "function" ? _ : (0, _constant.default)(+_), arc) : padRadius;
};
arc.startAngle = function (_) {
return arguments.length ? (startAngle = typeof _ === "function" ? _ : (0, _constant.default)(+_), arc) : startAngle;
};
arc.endAngle = function (_) {
return arguments.length ? (endAngle = typeof _ === "function" ? _ : (0, _constant.default)(+_), arc) : endAngle;
};
arc.padAngle = function (_) {
return arguments.length ? (padAngle = typeof _ === "function" ? _ : (0, _constant.default)(+_), arc) : padAngle;
};
arc.context = function (_) {
return arguments.length ? (context = _ == null ? null : _, arc) : context;
};
return arc;
}