Fika-Tarkov/mods/Raid Review/user/mods/raid_review__0.3.0/node_modules/bezier-js/dist/bezier.cjs

1409 lines
42 KiB
JavaScript

var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __markAsModule = (target) => __defProp(target, "__esModule", { value: true });
var __export = (target, all) => {
for (var name in all)
__defProp(target, name, { get: all[name], enumerable: true });
};
var __reExport = (target, module2, copyDefault, desc) => {
if (module2 && typeof module2 === "object" || typeof module2 === "function") {
for (let key of __getOwnPropNames(module2))
if (!__hasOwnProp.call(target, key) && (copyDefault || key !== "default"))
__defProp(target, key, { get: () => module2[key], enumerable: !(desc = __getOwnPropDesc(module2, key)) || desc.enumerable });
}
return target;
};
var __toCommonJS = /* @__PURE__ */ ((cache) => {
return (module2, temp) => {
return cache && cache.get(module2) || (temp = __reExport(__markAsModule({}), module2, 1), cache && cache.set(module2, temp), temp);
};
})(typeof WeakMap !== "undefined" ? /* @__PURE__ */ new WeakMap() : 0);
// src/bezier.js
var bezier_exports = {};
__export(bezier_exports, {
Bezier: () => Bezier
});
// src/utils.js
var { abs, cos, sin, acos, atan2, sqrt, pow } = Math;
function crt(v) {
return v < 0 ? -pow(-v, 1 / 3) : pow(v, 1 / 3);
}
var pi = Math.PI;
var tau = 2 * pi;
var quart = pi / 2;
var epsilon = 1e-6;
var nMax = Number.MAX_SAFE_INTEGER || 9007199254740991;
var nMin = Number.MIN_SAFE_INTEGER || -9007199254740991;
var ZERO = { x: 0, y: 0, z: 0 };
var utils = {
Tvalues: [
-0.06405689286260563,
0.06405689286260563,
-0.1911188674736163,
0.1911188674736163,
-0.3150426796961634,
0.3150426796961634,
-0.4337935076260451,
0.4337935076260451,
-0.5454214713888396,
0.5454214713888396,
-0.6480936519369755,
0.6480936519369755,
-0.7401241915785544,
0.7401241915785544,
-0.820001985973903,
0.820001985973903,
-0.8864155270044011,
0.8864155270044011,
-0.9382745520027328,
0.9382745520027328,
-0.9747285559713095,
0.9747285559713095,
-0.9951872199970213,
0.9951872199970213
],
Cvalues: [
0.12793819534675216,
0.12793819534675216,
0.1258374563468283,
0.1258374563468283,
0.12167047292780339,
0.12167047292780339,
0.1155056680537256,
0.1155056680537256,
0.10744427011596563,
0.10744427011596563,
0.09761865210411388,
0.09761865210411388,
0.08619016153195327,
0.08619016153195327,
0.0733464814110803,
0.0733464814110803,
0.05929858491543678,
0.05929858491543678,
0.04427743881741981,
0.04427743881741981,
0.028531388628933663,
0.028531388628933663,
0.0123412297999872,
0.0123412297999872
],
arcfn: function(t2, derivativeFn) {
const d = derivativeFn(t2);
let l = d.x * d.x + d.y * d.y;
if (typeof d.z !== "undefined") {
l += d.z * d.z;
}
return sqrt(l);
},
compute: function(t2, points, _3d) {
if (t2 === 0) {
points[0].t = 0;
return points[0];
}
const order = points.length - 1;
if (t2 === 1) {
points[order].t = 1;
return points[order];
}
const mt = 1 - t2;
let p = points;
if (order === 0) {
points[0].t = t2;
return points[0];
}
if (order === 1) {
const ret = {
x: mt * p[0].x + t2 * p[1].x,
y: mt * p[0].y + t2 * p[1].y,
t: t2
};
if (_3d) {
ret.z = mt * p[0].z + t2 * p[1].z;
}
return ret;
}
if (order < 4) {
let mt2 = mt * mt, t22 = t2 * t2, a, b, c, d = 0;
if (order === 2) {
p = [p[0], p[1], p[2], ZERO];
a = mt2;
b = mt * t2 * 2;
c = t22;
} else if (order === 3) {
a = mt2 * mt;
b = mt2 * t2 * 3;
c = mt * t22 * 3;
d = t2 * t22;
}
const ret = {
x: a * p[0].x + b * p[1].x + c * p[2].x + d * p[3].x,
y: a * p[0].y + b * p[1].y + c * p[2].y + d * p[3].y,
t: t2
};
if (_3d) {
ret.z = a * p[0].z + b * p[1].z + c * p[2].z + d * p[3].z;
}
return ret;
}
const dCpts = JSON.parse(JSON.stringify(points));
while (dCpts.length > 1) {
for (let i = 0; i < dCpts.length - 1; i++) {
dCpts[i] = {
x: dCpts[i].x + (dCpts[i + 1].x - dCpts[i].x) * t2,
y: dCpts[i].y + (dCpts[i + 1].y - dCpts[i].y) * t2
};
if (typeof dCpts[i].z !== "undefined") {
dCpts[i].z = dCpts[i].z + (dCpts[i + 1].z - dCpts[i].z) * t2;
}
}
dCpts.splice(dCpts.length - 1, 1);
}
dCpts[0].t = t2;
return dCpts[0];
},
computeWithRatios: function(t2, points, ratios, _3d) {
const mt = 1 - t2, r = ratios, p = points;
let f1 = r[0], f2 = r[1], f3 = r[2], f4 = r[3], d;
f1 *= mt;
f2 *= t2;
if (p.length === 2) {
d = f1 + f2;
return {
x: (f1 * p[0].x + f2 * p[1].x) / d,
y: (f1 * p[0].y + f2 * p[1].y) / d,
z: !_3d ? false : (f1 * p[0].z + f2 * p[1].z) / d,
t: t2
};
}
f1 *= mt;
f2 *= 2 * mt;
f3 *= t2 * t2;
if (p.length === 3) {
d = f1 + f2 + f3;
return {
x: (f1 * p[0].x + f2 * p[1].x + f3 * p[2].x) / d,
y: (f1 * p[0].y + f2 * p[1].y + f3 * p[2].y) / d,
z: !_3d ? false : (f1 * p[0].z + f2 * p[1].z + f3 * p[2].z) / d,
t: t2
};
}
f1 *= mt;
f2 *= 1.5 * mt;
f3 *= 3 * mt;
f4 *= t2 * t2 * t2;
if (p.length === 4) {
d = f1 + f2 + f3 + f4;
return {
x: (f1 * p[0].x + f2 * p[1].x + f3 * p[2].x + f4 * p[3].x) / d,
y: (f1 * p[0].y + f2 * p[1].y + f3 * p[2].y + f4 * p[3].y) / d,
z: !_3d ? false : (f1 * p[0].z + f2 * p[1].z + f3 * p[2].z + f4 * p[3].z) / d,
t: t2
};
}
},
derive: function(points, _3d) {
const dpoints = [];
for (let p = points, d = p.length, c = d - 1; d > 1; d--, c--) {
const list = [];
for (let j = 0, dpt; j < c; j++) {
dpt = {
x: c * (p[j + 1].x - p[j].x),
y: c * (p[j + 1].y - p[j].y)
};
if (_3d) {
dpt.z = c * (p[j + 1].z - p[j].z);
}
list.push(dpt);
}
dpoints.push(list);
p = list;
}
return dpoints;
},
between: function(v, m, M) {
return m <= v && v <= M || utils.approximately(v, m) || utils.approximately(v, M);
},
approximately: function(a, b, precision) {
return abs(a - b) <= (precision || epsilon);
},
length: function(derivativeFn) {
const z = 0.5, len = utils.Tvalues.length;
let sum = 0;
for (let i = 0, t2; i < len; i++) {
t2 = z * utils.Tvalues[i] + z;
sum += utils.Cvalues[i] * utils.arcfn(t2, derivativeFn);
}
return z * sum;
},
map: function(v, ds, de, ts, te) {
const d1 = de - ds, d2 = te - ts, v2 = v - ds, r = v2 / d1;
return ts + d2 * r;
},
lerp: function(r, v1, v2) {
const ret = {
x: v1.x + r * (v2.x - v1.x),
y: v1.y + r * (v2.y - v1.y)
};
if (v1.z !== void 0 && v2.z !== void 0) {
ret.z = v1.z + r * (v2.z - v1.z);
}
return ret;
},
pointToString: function(p) {
let s = p.x + "/" + p.y;
if (typeof p.z !== "undefined") {
s += "/" + p.z;
}
return s;
},
pointsToString: function(points) {
return "[" + points.map(utils.pointToString).join(", ") + "]";
},
copy: function(obj) {
return JSON.parse(JSON.stringify(obj));
},
angle: function(o, v1, v2) {
const dx1 = v1.x - o.x, dy1 = v1.y - o.y, dx2 = v2.x - o.x, dy2 = v2.y - o.y, cross = dx1 * dy2 - dy1 * dx2, dot = dx1 * dx2 + dy1 * dy2;
return atan2(cross, dot);
},
round: function(v, d) {
const s = "" + v;
const pos = s.indexOf(".");
return parseFloat(s.substring(0, pos + 1 + d));
},
dist: function(p1, p2) {
const dx = p1.x - p2.x, dy = p1.y - p2.y;
return sqrt(dx * dx + dy * dy);
},
closest: function(LUT, point) {
let mdist = pow(2, 63), mpos, d;
LUT.forEach(function(p, idx) {
d = utils.dist(point, p);
if (d < mdist) {
mdist = d;
mpos = idx;
}
});
return { mdist, mpos };
},
abcratio: function(t2, n) {
if (n !== 2 && n !== 3) {
return false;
}
if (typeof t2 === "undefined") {
t2 = 0.5;
} else if (t2 === 0 || t2 === 1) {
return t2;
}
const bottom = pow(t2, n) + pow(1 - t2, n), top = bottom - 1;
return abs(top / bottom);
},
projectionratio: function(t2, n) {
if (n !== 2 && n !== 3) {
return false;
}
if (typeof t2 === "undefined") {
t2 = 0.5;
} else if (t2 === 0 || t2 === 1) {
return t2;
}
const top = pow(1 - t2, n), bottom = pow(t2, n) + top;
return top / bottom;
},
lli8: function(x1, y1, x2, y2, x3, y3, x4, y4) {
const nx = (x1 * y2 - y1 * x2) * (x3 - x4) - (x1 - x2) * (x3 * y4 - y3 * x4), ny = (x1 * y2 - y1 * x2) * (y3 - y4) - (y1 - y2) * (x3 * y4 - y3 * x4), d = (x1 - x2) * (y3 - y4) - (y1 - y2) * (x3 - x4);
if (d == 0) {
return false;
}
return { x: nx / d, y: ny / d };
},
lli4: function(p1, p2, p3, p4) {
const x1 = p1.x, y1 = p1.y, x2 = p2.x, y2 = p2.y, x3 = p3.x, y3 = p3.y, x4 = p4.x, y4 = p4.y;
return utils.lli8(x1, y1, x2, y2, x3, y3, x4, y4);
},
lli: function(v1, v2) {
return utils.lli4(v1, v1.c, v2, v2.c);
},
makeline: function(p1, p2) {
return new Bezier(p1.x, p1.y, (p1.x + p2.x) / 2, (p1.y + p2.y) / 2, p2.x, p2.y);
},
findbbox: function(sections) {
let mx = nMax, my = nMax, MX = nMin, MY = nMin;
sections.forEach(function(s) {
const bbox = s.bbox();
if (mx > bbox.x.min)
mx = bbox.x.min;
if (my > bbox.y.min)
my = bbox.y.min;
if (MX < bbox.x.max)
MX = bbox.x.max;
if (MY < bbox.y.max)
MY = bbox.y.max;
});
return {
x: { min: mx, mid: (mx + MX) / 2, max: MX, size: MX - mx },
y: { min: my, mid: (my + MY) / 2, max: MY, size: MY - my }
};
},
shapeintersections: function(s1, bbox1, s2, bbox2, curveIntersectionThreshold) {
if (!utils.bboxoverlap(bbox1, bbox2))
return [];
const intersections = [];
const a1 = [s1.startcap, s1.forward, s1.back, s1.endcap];
const a2 = [s2.startcap, s2.forward, s2.back, s2.endcap];
a1.forEach(function(l1) {
if (l1.virtual)
return;
a2.forEach(function(l2) {
if (l2.virtual)
return;
const iss = l1.intersects(l2, curveIntersectionThreshold);
if (iss.length > 0) {
iss.c1 = l1;
iss.c2 = l2;
iss.s1 = s1;
iss.s2 = s2;
intersections.push(iss);
}
});
});
return intersections;
},
makeshape: function(forward, back, curveIntersectionThreshold) {
const bpl = back.points.length;
const fpl = forward.points.length;
const start = utils.makeline(back.points[bpl - 1], forward.points[0]);
const end = utils.makeline(forward.points[fpl - 1], back.points[0]);
const shape = {
startcap: start,
forward,
back,
endcap: end,
bbox: utils.findbbox([start, forward, back, end])
};
shape.intersections = function(s2) {
return utils.shapeintersections(shape, shape.bbox, s2, s2.bbox, curveIntersectionThreshold);
};
return shape;
},
getminmax: function(curve, d, list) {
if (!list)
return { min: 0, max: 0 };
let min2 = nMax, max2 = nMin, t2, c;
if (list.indexOf(0) === -1) {
list = [0].concat(list);
}
if (list.indexOf(1) === -1) {
list.push(1);
}
for (let i = 0, len = list.length; i < len; i++) {
t2 = list[i];
c = curve.get(t2);
if (c[d] < min2) {
min2 = c[d];
}
if (c[d] > max2) {
max2 = c[d];
}
}
return { min: min2, mid: (min2 + max2) / 2, max: max2, size: max2 - min2 };
},
align: function(points, line) {
const tx = line.p1.x, ty = line.p1.y, a = -atan2(line.p2.y - ty, line.p2.x - tx), d = function(v) {
return {
x: (v.x - tx) * cos(a) - (v.y - ty) * sin(a),
y: (v.x - tx) * sin(a) + (v.y - ty) * cos(a)
};
};
return points.map(d);
},
roots: function(points, line) {
line = line || { p1: { x: 0, y: 0 }, p2: { x: 1, y: 0 } };
const order = points.length - 1;
const aligned = utils.align(points, line);
const reduce = function(t2) {
return 0 <= t2 && t2 <= 1;
};
if (order === 2) {
const a2 = aligned[0].y, b2 = aligned[1].y, c2 = aligned[2].y, d2 = a2 - 2 * b2 + c2;
if (d2 !== 0) {
const m1 = -sqrt(b2 * b2 - a2 * c2), m2 = -a2 + b2, v12 = -(m1 + m2) / d2, v2 = -(-m1 + m2) / d2;
return [v12, v2].filter(reduce);
} else if (b2 !== c2 && d2 === 0) {
return [(2 * b2 - c2) / (2 * b2 - 2 * c2)].filter(reduce);
}
return [];
}
const pa = aligned[0].y, pb = aligned[1].y, pc = aligned[2].y, pd = aligned[3].y;
let d = -pa + 3 * pb - 3 * pc + pd, a = 3 * pa - 6 * pb + 3 * pc, b = -3 * pa + 3 * pb, c = pa;
if (utils.approximately(d, 0)) {
if (utils.approximately(a, 0)) {
if (utils.approximately(b, 0)) {
return [];
}
return [-c / b].filter(reduce);
}
const q3 = sqrt(b * b - 4 * a * c), a2 = 2 * a;
return [(q3 - b) / a2, (-b - q3) / a2].filter(reduce);
}
a /= d;
b /= d;
c /= d;
const p = (3 * b - a * a) / 3, p3 = p / 3, q = (2 * a * a * a - 9 * a * b + 27 * c) / 27, q2 = q / 2, discriminant = q2 * q2 + p3 * p3 * p3;
let u1, v1, x1, x2, x3;
if (discriminant < 0) {
const mp3 = -p / 3, mp33 = mp3 * mp3 * mp3, r = sqrt(mp33), t2 = -q / (2 * r), cosphi = t2 < -1 ? -1 : t2 > 1 ? 1 : t2, phi = acos(cosphi), crtr = crt(r), t1 = 2 * crtr;
x1 = t1 * cos(phi / 3) - a / 3;
x2 = t1 * cos((phi + tau) / 3) - a / 3;
x3 = t1 * cos((phi + 2 * tau) / 3) - a / 3;
return [x1, x2, x3].filter(reduce);
} else if (discriminant === 0) {
u1 = q2 < 0 ? crt(-q2) : -crt(q2);
x1 = 2 * u1 - a / 3;
x2 = -u1 - a / 3;
return [x1, x2].filter(reduce);
} else {
const sd = sqrt(discriminant);
u1 = crt(-q2 + sd);
v1 = crt(q2 + sd);
return [u1 - v1 - a / 3].filter(reduce);
}
},
droots: function(p) {
if (p.length === 3) {
const a = p[0], b = p[1], c = p[2], d = a - 2 * b + c;
if (d !== 0) {
const m1 = -sqrt(b * b - a * c), m2 = -a + b, v1 = -(m1 + m2) / d, v2 = -(-m1 + m2) / d;
return [v1, v2];
} else if (b !== c && d === 0) {
return [(2 * b - c) / (2 * (b - c))];
}
return [];
}
if (p.length === 2) {
const a = p[0], b = p[1];
if (a !== b) {
return [a / (a - b)];
}
return [];
}
return [];
},
curvature: function(t2, d1, d2, _3d, kOnly) {
let num, dnm, adk, dk, k = 0, r = 0;
const d = utils.compute(t2, d1);
const dd = utils.compute(t2, d2);
const qdsum = d.x * d.x + d.y * d.y;
if (_3d) {
num = sqrt(pow(d.y * dd.z - dd.y * d.z, 2) + pow(d.z * dd.x - dd.z * d.x, 2) + pow(d.x * dd.y - dd.x * d.y, 2));
dnm = pow(qdsum + d.z * d.z, 3 / 2);
} else {
num = d.x * dd.y - d.y * dd.x;
dnm = pow(qdsum, 3 / 2);
}
if (num === 0 || dnm === 0) {
return { k: 0, r: 0 };
}
k = num / dnm;
r = dnm / num;
if (!kOnly) {
const pk = utils.curvature(t2 - 1e-3, d1, d2, _3d, true).k;
const nk = utils.curvature(t2 + 1e-3, d1, d2, _3d, true).k;
dk = (nk - k + (k - pk)) / 2;
adk = (abs(nk - k) + abs(k - pk)) / 2;
}
return { k, r, dk, adk };
},
inflections: function(points) {
if (points.length < 4)
return [];
const p = utils.align(points, { p1: points[0], p2: points.slice(-1)[0] }), a = p[2].x * p[1].y, b = p[3].x * p[1].y, c = p[1].x * p[2].y, d = p[3].x * p[2].y, v1 = 18 * (-3 * a + 2 * b + 3 * c - d), v2 = 18 * (3 * a - b - 3 * c), v3 = 18 * (c - a);
if (utils.approximately(v1, 0)) {
if (!utils.approximately(v2, 0)) {
let t2 = -v3 / v2;
if (0 <= t2 && t2 <= 1)
return [t2];
}
return [];
}
const d2 = 2 * v1;
if (utils.approximately(d2, 0))
return [];
const trm = v2 * v2 - 4 * v1 * v3;
if (trm < 0)
return [];
const sq = Math.sqrt(trm);
return [(sq - v2) / d2, -(v2 + sq) / d2].filter(function(r) {
return 0 <= r && r <= 1;
});
},
bboxoverlap: function(b1, b2) {
const dims = ["x", "y"], len = dims.length;
for (let i = 0, dim, l, t2, d; i < len; i++) {
dim = dims[i];
l = b1[dim].mid;
t2 = b2[dim].mid;
d = (b1[dim].size + b2[dim].size) / 2;
if (abs(l - t2) >= d)
return false;
}
return true;
},
expandbox: function(bbox, _bbox) {
if (_bbox.x.min < bbox.x.min) {
bbox.x.min = _bbox.x.min;
}
if (_bbox.y.min < bbox.y.min) {
bbox.y.min = _bbox.y.min;
}
if (_bbox.z && _bbox.z.min < bbox.z.min) {
bbox.z.min = _bbox.z.min;
}
if (_bbox.x.max > bbox.x.max) {
bbox.x.max = _bbox.x.max;
}
if (_bbox.y.max > bbox.y.max) {
bbox.y.max = _bbox.y.max;
}
if (_bbox.z && _bbox.z.max > bbox.z.max) {
bbox.z.max = _bbox.z.max;
}
bbox.x.mid = (bbox.x.min + bbox.x.max) / 2;
bbox.y.mid = (bbox.y.min + bbox.y.max) / 2;
if (bbox.z) {
bbox.z.mid = (bbox.z.min + bbox.z.max) / 2;
}
bbox.x.size = bbox.x.max - bbox.x.min;
bbox.y.size = bbox.y.max - bbox.y.min;
if (bbox.z) {
bbox.z.size = bbox.z.max - bbox.z.min;
}
},
pairiteration: function(c1, c2, curveIntersectionThreshold) {
const c1b = c1.bbox(), c2b = c2.bbox(), r = 1e5, threshold = curveIntersectionThreshold || 0.5;
if (c1b.x.size + c1b.y.size < threshold && c2b.x.size + c2b.y.size < threshold) {
return [
(r * (c1._t1 + c1._t2) / 2 | 0) / r + "/" + (r * (c2._t1 + c2._t2) / 2 | 0) / r
];
}
let cc1 = c1.split(0.5), cc2 = c2.split(0.5), pairs = [
{ left: cc1.left, right: cc2.left },
{ left: cc1.left, right: cc2.right },
{ left: cc1.right, right: cc2.right },
{ left: cc1.right, right: cc2.left }
];
pairs = pairs.filter(function(pair) {
return utils.bboxoverlap(pair.left.bbox(), pair.right.bbox());
});
let results = [];
if (pairs.length === 0)
return results;
pairs.forEach(function(pair) {
results = results.concat(utils.pairiteration(pair.left, pair.right, threshold));
});
results = results.filter(function(v, i) {
return results.indexOf(v) === i;
});
return results;
},
getccenter: function(p1, p2, p3) {
const dx1 = p2.x - p1.x, dy1 = p2.y - p1.y, dx2 = p3.x - p2.x, dy2 = p3.y - p2.y, dx1p = dx1 * cos(quart) - dy1 * sin(quart), dy1p = dx1 * sin(quart) + dy1 * cos(quart), dx2p = dx2 * cos(quart) - dy2 * sin(quart), dy2p = dx2 * sin(quart) + dy2 * cos(quart), mx1 = (p1.x + p2.x) / 2, my1 = (p1.y + p2.y) / 2, mx2 = (p2.x + p3.x) / 2, my2 = (p2.y + p3.y) / 2, mx1n = mx1 + dx1p, my1n = my1 + dy1p, mx2n = mx2 + dx2p, my2n = my2 + dy2p, arc = utils.lli8(mx1, my1, mx1n, my1n, mx2, my2, mx2n, my2n), r = utils.dist(arc, p1);
let s = atan2(p1.y - arc.y, p1.x - arc.x), m = atan2(p2.y - arc.y, p2.x - arc.x), e = atan2(p3.y - arc.y, p3.x - arc.x), _;
if (s < e) {
if (s > m || m > e) {
s += tau;
}
if (s > e) {
_ = e;
e = s;
s = _;
}
} else {
if (e < m && m < s) {
_ = e;
e = s;
s = _;
} else {
e += tau;
}
}
arc.s = s;
arc.e = e;
arc.r = r;
return arc;
},
numberSort: function(a, b) {
return a - b;
}
};
// src/poly-bezier.js
var PolyBezier = class {
constructor(curves) {
this.curves = [];
this._3d = false;
if (!!curves) {
this.curves = curves;
this._3d = this.curves[0]._3d;
}
}
valueOf() {
return this.toString();
}
toString() {
return "[" + this.curves.map(function(curve) {
return utils.pointsToString(curve.points);
}).join(", ") + "]";
}
addCurve(curve) {
this.curves.push(curve);
this._3d = this._3d || curve._3d;
}
length() {
return this.curves.map(function(v) {
return v.length();
}).reduce(function(a, b) {
return a + b;
});
}
curve(idx) {
return this.curves[idx];
}
bbox() {
const c = this.curves;
var bbox = c[0].bbox();
for (var i = 1; i < c.length; i++) {
utils.expandbox(bbox, c[i].bbox());
}
return bbox;
}
offset(d) {
const offset = [];
this.curves.forEach(function(v) {
offset.push(...v.offset(d));
});
return new PolyBezier(offset);
}
};
// src/bezier.js
var { abs: abs2, min, max, cos: cos2, sin: sin2, acos: acos2, sqrt: sqrt2 } = Math;
var pi2 = Math.PI;
var Bezier = class {
constructor(coords) {
let args = coords && coords.forEach ? coords : Array.from(arguments).slice();
let coordlen = false;
if (typeof args[0] === "object") {
coordlen = args.length;
const newargs = [];
args.forEach(function(point2) {
["x", "y", "z"].forEach(function(d) {
if (typeof point2[d] !== "undefined") {
newargs.push(point2[d]);
}
});
});
args = newargs;
}
let higher = false;
const len = args.length;
if (coordlen) {
if (coordlen > 4) {
if (arguments.length !== 1) {
throw new Error("Only new Bezier(point[]) is accepted for 4th and higher order curves");
}
higher = true;
}
} else {
if (len !== 6 && len !== 8 && len !== 9 && len !== 12) {
if (arguments.length !== 1) {
throw new Error("Only new Bezier(point[]) is accepted for 4th and higher order curves");
}
}
}
const _3d = this._3d = !higher && (len === 9 || len === 12) || coords && coords[0] && typeof coords[0].z !== "undefined";
const points = this.points = [];
for (let idx = 0, step = _3d ? 3 : 2; idx < len; idx += step) {
var point = {
x: args[idx],
y: args[idx + 1]
};
if (_3d) {
point.z = args[idx + 2];
}
points.push(point);
}
const order = this.order = points.length - 1;
const dims = this.dims = ["x", "y"];
if (_3d)
dims.push("z");
this.dimlen = dims.length;
const aligned = utils.align(points, { p1: points[0], p2: points[order] });
const baselength = utils.dist(points[0], points[order]);
this._linear = aligned.reduce((t2, p) => t2 + abs2(p.y), 0) < baselength / 50;
this._lut = [];
this._t1 = 0;
this._t2 = 1;
this.update();
}
static quadraticFromPoints(p1, p2, p3, t2) {
if (typeof t2 === "undefined") {
t2 = 0.5;
}
if (t2 === 0) {
return new Bezier(p2, p2, p3);
}
if (t2 === 1) {
return new Bezier(p1, p2, p2);
}
const abc = Bezier.getABC(2, p1, p2, p3, t2);
return new Bezier(p1, abc.A, p3);
}
static cubicFromPoints(S, B, E, t2, d1) {
if (typeof t2 === "undefined") {
t2 = 0.5;
}
const abc = Bezier.getABC(3, S, B, E, t2);
if (typeof d1 === "undefined") {
d1 = utils.dist(B, abc.C);
}
const d2 = d1 * (1 - t2) / t2;
const selen = utils.dist(S, E), lx = (E.x - S.x) / selen, ly = (E.y - S.y) / selen, bx1 = d1 * lx, by1 = d1 * ly, bx2 = d2 * lx, by2 = d2 * ly;
const e1 = { x: B.x - bx1, y: B.y - by1 }, e2 = { x: B.x + bx2, y: B.y + by2 }, A = abc.A, v1 = { x: A.x + (e1.x - A.x) / (1 - t2), y: A.y + (e1.y - A.y) / (1 - t2) }, v2 = { x: A.x + (e2.x - A.x) / t2, y: A.y + (e2.y - A.y) / t2 }, nc1 = { x: S.x + (v1.x - S.x) / t2, y: S.y + (v1.y - S.y) / t2 }, nc2 = {
x: E.x + (v2.x - E.x) / (1 - t2),
y: E.y + (v2.y - E.y) / (1 - t2)
};
return new Bezier(S, nc1, nc2, E);
}
static getUtils() {
return utils;
}
getUtils() {
return Bezier.getUtils();
}
static get PolyBezier() {
return PolyBezier;
}
valueOf() {
return this.toString();
}
toString() {
return utils.pointsToString(this.points);
}
toSVG() {
if (this._3d)
return false;
const p = this.points, x = p[0].x, y = p[0].y, s = ["M", x, y, this.order === 2 ? "Q" : "C"];
for (let i = 1, last = p.length; i < last; i++) {
s.push(p[i].x);
s.push(p[i].y);
}
return s.join(" ");
}
setRatios(ratios) {
if (ratios.length !== this.points.length) {
throw new Error("incorrect number of ratio values");
}
this.ratios = ratios;
this._lut = [];
}
verify() {
const print = this.coordDigest();
if (print !== this._print) {
this._print = print;
this.update();
}
}
coordDigest() {
return this.points.map(function(c, pos) {
return "" + pos + c.x + c.y + (c.z ? c.z : 0);
}).join("");
}
update() {
this._lut = [];
this.dpoints = utils.derive(this.points, this._3d);
this.computedirection();
}
computedirection() {
const points = this.points;
const angle = utils.angle(points[0], points[this.order], points[1]);
this.clockwise = angle > 0;
}
length() {
return utils.length(this.derivative.bind(this));
}
static getABC(order = 2, S, B, E, t2 = 0.5) {
const u = utils.projectionratio(t2, order), um = 1 - u, C = {
x: u * S.x + um * E.x,
y: u * S.y + um * E.y
}, s = utils.abcratio(t2, order), A = {
x: B.x + (B.x - C.x) / s,
y: B.y + (B.y - C.y) / s
};
return { A, B, C, S, E };
}
getABC(t2, B) {
B = B || this.get(t2);
let S = this.points[0];
let E = this.points[this.order];
return Bezier.getABC(this.order, S, B, E, t2);
}
getLUT(steps) {
this.verify();
steps = steps || 100;
if (this._lut.length === steps + 1) {
return this._lut;
}
this._lut = [];
steps++;
this._lut = [];
for (let i = 0, p, t2; i < steps; i++) {
t2 = i / (steps - 1);
p = this.compute(t2);
p.t = t2;
this._lut.push(p);
}
return this._lut;
}
on(point, error) {
error = error || 5;
const lut = this.getLUT(), hits = [];
for (let i = 0, c, t2 = 0; i < lut.length; i++) {
c = lut[i];
if (utils.dist(c, point) < error) {
hits.push(c);
t2 += i / lut.length;
}
}
if (!hits.length)
return false;
return t /= hits.length;
}
project(point) {
const LUT = this.getLUT(), l = LUT.length - 1, closest = utils.closest(LUT, point), mpos = closest.mpos, t1 = (mpos - 1) / l, t2 = (mpos + 1) / l, step = 0.1 / l;
let mdist = closest.mdist, t3 = t1, ft = t3, p;
mdist += 1;
for (let d; t3 < t2 + step; t3 += step) {
p = this.compute(t3);
d = utils.dist(point, p);
if (d < mdist) {
mdist = d;
ft = t3;
}
}
ft = ft < 0 ? 0 : ft > 1 ? 1 : ft;
p = this.compute(ft);
p.t = ft;
p.d = mdist;
return p;
}
get(t2) {
return this.compute(t2);
}
point(idx) {
return this.points[idx];
}
compute(t2) {
if (this.ratios) {
return utils.computeWithRatios(t2, this.points, this.ratios, this._3d);
}
return utils.compute(t2, this.points, this._3d, this.ratios);
}
raise() {
const p = this.points, np = [p[0]], k = p.length;
for (let i = 1, pi3, pim; i < k; i++) {
pi3 = p[i];
pim = p[i - 1];
np[i] = {
x: (k - i) / k * pi3.x + i / k * pim.x,
y: (k - i) / k * pi3.y + i / k * pim.y
};
}
np[k] = p[k - 1];
return new Bezier(np);
}
derivative(t2) {
return utils.compute(t2, this.dpoints[0], this._3d);
}
dderivative(t2) {
return utils.compute(t2, this.dpoints[1], this._3d);
}
align() {
let p = this.points;
return new Bezier(utils.align(p, { p1: p[0], p2: p[p.length - 1] }));
}
curvature(t2) {
return utils.curvature(t2, this.dpoints[0], this.dpoints[1], this._3d);
}
inflections() {
return utils.inflections(this.points);
}
normal(t2) {
return this._3d ? this.__normal3(t2) : this.__normal2(t2);
}
__normal2(t2) {
const d = this.derivative(t2);
const q = sqrt2(d.x * d.x + d.y * d.y);
return { t: t2, x: -d.y / q, y: d.x / q };
}
__normal3(t2) {
const r1 = this.derivative(t2), r2 = this.derivative(t2 + 0.01), q1 = sqrt2(r1.x * r1.x + r1.y * r1.y + r1.z * r1.z), q2 = sqrt2(r2.x * r2.x + r2.y * r2.y + r2.z * r2.z);
r1.x /= q1;
r1.y /= q1;
r1.z /= q1;
r2.x /= q2;
r2.y /= q2;
r2.z /= q2;
const c = {
x: r2.y * r1.z - r2.z * r1.y,
y: r2.z * r1.x - r2.x * r1.z,
z: r2.x * r1.y - r2.y * r1.x
};
const m = sqrt2(c.x * c.x + c.y * c.y + c.z * c.z);
c.x /= m;
c.y /= m;
c.z /= m;
const R = [
c.x * c.x,
c.x * c.y - c.z,
c.x * c.z + c.y,
c.x * c.y + c.z,
c.y * c.y,
c.y * c.z - c.x,
c.x * c.z - c.y,
c.y * c.z + c.x,
c.z * c.z
];
const n = {
t: t2,
x: R[0] * r1.x + R[1] * r1.y + R[2] * r1.z,
y: R[3] * r1.x + R[4] * r1.y + R[5] * r1.z,
z: R[6] * r1.x + R[7] * r1.y + R[8] * r1.z
};
return n;
}
hull(t2) {
let p = this.points, _p = [], q = [], idx = 0;
q[idx++] = p[0];
q[idx++] = p[1];
q[idx++] = p[2];
if (this.order === 3) {
q[idx++] = p[3];
}
while (p.length > 1) {
_p = [];
for (let i = 0, pt, l = p.length - 1; i < l; i++) {
pt = utils.lerp(t2, p[i], p[i + 1]);
q[idx++] = pt;
_p.push(pt);
}
p = _p;
}
return q;
}
split(t1, t2) {
if (t1 === 0 && !!t2) {
return this.split(t2).left;
}
if (t2 === 1) {
return this.split(t1).right;
}
const q = this.hull(t1);
const result = {
left: this.order === 2 ? new Bezier([q[0], q[3], q[5]]) : new Bezier([q[0], q[4], q[7], q[9]]),
right: this.order === 2 ? new Bezier([q[5], q[4], q[2]]) : new Bezier([q[9], q[8], q[6], q[3]]),
span: q
};
result.left._t1 = utils.map(0, 0, 1, this._t1, this._t2);
result.left._t2 = utils.map(t1, 0, 1, this._t1, this._t2);
result.right._t1 = utils.map(t1, 0, 1, this._t1, this._t2);
result.right._t2 = utils.map(1, 0, 1, this._t1, this._t2);
if (!t2) {
return result;
}
t2 = utils.map(t2, t1, 1, 0, 1);
return result.right.split(t2).left;
}
extrema() {
const result = {};
let roots = [];
this.dims.forEach(function(dim) {
let mfn = function(v) {
return v[dim];
};
let p = this.dpoints[0].map(mfn);
result[dim] = utils.droots(p);
if (this.order === 3) {
p = this.dpoints[1].map(mfn);
result[dim] = result[dim].concat(utils.droots(p));
}
result[dim] = result[dim].filter(function(t2) {
return t2 >= 0 && t2 <= 1;
});
roots = roots.concat(result[dim].sort(utils.numberSort));
}.bind(this));
result.values = roots.sort(utils.numberSort).filter(function(v, idx) {
return roots.indexOf(v) === idx;
});
return result;
}
bbox() {
const extrema = this.extrema(), result = {};
this.dims.forEach(function(d) {
result[d] = utils.getminmax(this, d, extrema[d]);
}.bind(this));
return result;
}
overlaps(curve) {
const lbbox = this.bbox(), tbbox = curve.bbox();
return utils.bboxoverlap(lbbox, tbbox);
}
offset(t2, d) {
if (typeof d !== "undefined") {
const c = this.get(t2), n = this.normal(t2);
const ret = {
c,
n,
x: c.x + n.x * d,
y: c.y + n.y * d
};
if (this._3d) {
ret.z = c.z + n.z * d;
}
return ret;
}
if (this._linear) {
const nv = this.normal(0), coords = this.points.map(function(p) {
const ret = {
x: p.x + t2 * nv.x,
y: p.y + t2 * nv.y
};
if (p.z && nv.z) {
ret.z = p.z + t2 * nv.z;
}
return ret;
});
return [new Bezier(coords)];
}
return this.reduce().map(function(s) {
if (s._linear) {
return s.offset(t2)[0];
}
return s.scale(t2);
});
}
simple() {
if (this.order === 3) {
const a1 = utils.angle(this.points[0], this.points[3], this.points[1]);
const a2 = utils.angle(this.points[0], this.points[3], this.points[2]);
if (a1 > 0 && a2 < 0 || a1 < 0 && a2 > 0)
return false;
}
const n1 = this.normal(0);
const n2 = this.normal(1);
let s = n1.x * n2.x + n1.y * n2.y;
if (this._3d) {
s += n1.z * n2.z;
}
return abs2(acos2(s)) < pi2 / 3;
}
reduce() {
let i, t1 = 0, t2 = 0, step = 0.01, segment, pass1 = [], pass2 = [];
let extrema = this.extrema().values;
if (extrema.indexOf(0) === -1) {
extrema = [0].concat(extrema);
}
if (extrema.indexOf(1) === -1) {
extrema.push(1);
}
for (t1 = extrema[0], i = 1; i < extrema.length; i++) {
t2 = extrema[i];
segment = this.split(t1, t2);
segment._t1 = t1;
segment._t2 = t2;
pass1.push(segment);
t1 = t2;
}
pass1.forEach(function(p1) {
t1 = 0;
t2 = 0;
while (t2 <= 1) {
for (t2 = t1 + step; t2 <= 1 + step; t2 += step) {
segment = p1.split(t1, t2);
if (!segment.simple()) {
t2 -= step;
if (abs2(t1 - t2) < step) {
return [];
}
segment = p1.split(t1, t2);
segment._t1 = utils.map(t1, 0, 1, p1._t1, p1._t2);
segment._t2 = utils.map(t2, 0, 1, p1._t1, p1._t2);
pass2.push(segment);
t1 = t2;
break;
}
}
}
if (t1 < 1) {
segment = p1.split(t1, 1);
segment._t1 = utils.map(t1, 0, 1, p1._t1, p1._t2);
segment._t2 = p1._t2;
pass2.push(segment);
}
});
return pass2;
}
translate(v, d1, d2) {
d2 = typeof d2 === "number" ? d2 : d1;
const o = this.order;
let d = this.points.map((_, i) => (1 - i / o) * d1 + i / o * d2);
return new Bezier(this.points.map((p, i) => ({
x: p.x + v.x * d[i],
y: p.y + v.y * d[i]
})));
}
scale(d) {
const order = this.order;
let distanceFn = false;
if (typeof d === "function") {
distanceFn = d;
}
if (distanceFn && order === 2) {
return this.raise().scale(distanceFn);
}
const clockwise = this.clockwise;
const points = this.points;
if (this._linear) {
return this.translate(this.normal(0), distanceFn ? distanceFn(0) : d, distanceFn ? distanceFn(1) : d);
}
const r1 = distanceFn ? distanceFn(0) : d;
const r2 = distanceFn ? distanceFn(1) : d;
const v = [this.offset(0, 10), this.offset(1, 10)];
const np = [];
const o = utils.lli4(v[0], v[0].c, v[1], v[1].c);
if (!o) {
throw new Error("cannot scale this curve. Try reducing it first.");
}
[0, 1].forEach(function(t2) {
const p = np[t2 * order] = utils.copy(points[t2 * order]);
p.x += (t2 ? r2 : r1) * v[t2].n.x;
p.y += (t2 ? r2 : r1) * v[t2].n.y;
});
if (!distanceFn) {
[0, 1].forEach((t2) => {
if (order === 2 && !!t2)
return;
const p = np[t2 * order];
const d2 = this.derivative(t2);
const p2 = { x: p.x + d2.x, y: p.y + d2.y };
np[t2 + 1] = utils.lli4(p, p2, o, points[t2 + 1]);
});
return new Bezier(np);
}
[0, 1].forEach(function(t2) {
if (order === 2 && !!t2)
return;
var p = points[t2 + 1];
var ov = {
x: p.x - o.x,
y: p.y - o.y
};
var rc = distanceFn ? distanceFn((t2 + 1) / order) : d;
if (distanceFn && !clockwise)
rc = -rc;
var m = sqrt2(ov.x * ov.x + ov.y * ov.y);
ov.x /= m;
ov.y /= m;
np[t2 + 1] = {
x: p.x + rc * ov.x,
y: p.y + rc * ov.y
};
});
return new Bezier(np);
}
outline(d1, d2, d3, d4) {
d2 = d2 === void 0 ? d1 : d2;
if (this._linear) {
const n = this.normal(0);
const start = this.points[0];
const end = this.points[this.points.length - 1];
let s, mid, e;
if (d3 === void 0) {
d3 = d1;
d4 = d2;
}
s = { x: start.x + n.x * d1, y: start.y + n.y * d1 };
e = { x: end.x + n.x * d3, y: end.y + n.y * d3 };
mid = { x: (s.x + e.x) / 2, y: (s.y + e.y) / 2 };
const fline = [s, mid, e];
s = { x: start.x - n.x * d2, y: start.y - n.y * d2 };
e = { x: end.x - n.x * d4, y: end.y - n.y * d4 };
mid = { x: (s.x + e.x) / 2, y: (s.y + e.y) / 2 };
const bline = [e, mid, s];
const ls2 = utils.makeline(bline[2], fline[0]);
const le2 = utils.makeline(fline[2], bline[0]);
const segments2 = [ls2, new Bezier(fline), le2, new Bezier(bline)];
return new PolyBezier(segments2);
}
const reduced = this.reduce(), len = reduced.length, fcurves = [];
let bcurves = [], p, alen = 0, tlen = this.length();
const graduated = typeof d3 !== "undefined" && typeof d4 !== "undefined";
function linearDistanceFunction(s, e, tlen2, alen2, slen) {
return function(v) {
const f1 = alen2 / tlen2, f2 = (alen2 + slen) / tlen2, d = e - s;
return utils.map(v, 0, 1, s + f1 * d, s + f2 * d);
};
}
reduced.forEach(function(segment) {
const slen = segment.length();
if (graduated) {
fcurves.push(segment.scale(linearDistanceFunction(d1, d3, tlen, alen, slen)));
bcurves.push(segment.scale(linearDistanceFunction(-d2, -d4, tlen, alen, slen)));
} else {
fcurves.push(segment.scale(d1));
bcurves.push(segment.scale(-d2));
}
alen += slen;
});
bcurves = bcurves.map(function(s) {
p = s.points;
if (p[3]) {
s.points = [p[3], p[2], p[1], p[0]];
} else {
s.points = [p[2], p[1], p[0]];
}
return s;
}).reverse();
const fs = fcurves[0].points[0], fe = fcurves[len - 1].points[fcurves[len - 1].points.length - 1], bs = bcurves[len - 1].points[bcurves[len - 1].points.length - 1], be = bcurves[0].points[0], ls = utils.makeline(bs, fs), le = utils.makeline(fe, be), segments = [ls].concat(fcurves).concat([le]).concat(bcurves);
return new PolyBezier(segments);
}
outlineshapes(d1, d2, curveIntersectionThreshold) {
d2 = d2 || d1;
const outline = this.outline(d1, d2).curves;
const shapes = [];
for (let i = 1, len = outline.length; i < len / 2; i++) {
const shape = utils.makeshape(outline[i], outline[len - i], curveIntersectionThreshold);
shape.startcap.virtual = i > 1;
shape.endcap.virtual = i < len / 2 - 1;
shapes.push(shape);
}
return shapes;
}
intersects(curve, curveIntersectionThreshold) {
if (!curve)
return this.selfintersects(curveIntersectionThreshold);
if (curve.p1 && curve.p2) {
return this.lineIntersects(curve);
}
if (curve instanceof Bezier) {
curve = curve.reduce();
}
return this.curveintersects(this.reduce(), curve, curveIntersectionThreshold);
}
lineIntersects(line) {
const mx = min(line.p1.x, line.p2.x), my = min(line.p1.y, line.p2.y), MX = max(line.p1.x, line.p2.x), MY = max(line.p1.y, line.p2.y);
return utils.roots(this.points, line).filter((t2) => {
var p = this.get(t2);
return utils.between(p.x, mx, MX) && utils.between(p.y, my, MY);
});
}
selfintersects(curveIntersectionThreshold) {
const reduced = this.reduce(), len = reduced.length - 2, results = [];
for (let i = 0, result, left, right; i < len; i++) {
left = reduced.slice(i, i + 1);
right = reduced.slice(i + 2);
result = this.curveintersects(left, right, curveIntersectionThreshold);
results.push(...result);
}
return results;
}
curveintersects(c1, c2, curveIntersectionThreshold) {
const pairs = [];
c1.forEach(function(l) {
c2.forEach(function(r) {
if (l.overlaps(r)) {
pairs.push({ left: l, right: r });
}
});
});
let intersections = [];
pairs.forEach(function(pair) {
const result = utils.pairiteration(pair.left, pair.right, curveIntersectionThreshold);
if (result.length > 0) {
intersections = intersections.concat(result);
}
});
return intersections;
}
arcs(errorThreshold) {
errorThreshold = errorThreshold || 0.5;
return this._iterate(errorThreshold, []);
}
_error(pc, np1, s, e) {
const q = (e - s) / 4, c1 = this.get(s + q), c2 = this.get(e - q), ref = utils.dist(pc, np1), d1 = utils.dist(pc, c1), d2 = utils.dist(pc, c2);
return abs2(d1 - ref) + abs2(d2 - ref);
}
_iterate(errorThreshold, circles) {
let t_s = 0, t_e = 1, safety;
do {
safety = 0;
t_e = 1;
let np1 = this.get(t_s), np2, np3, arc, prev_arc;
let curr_good = false, prev_good = false, done;
let t_m = t_e, prev_e = 1, step = 0;
do {
prev_good = curr_good;
prev_arc = arc;
t_m = (t_s + t_e) / 2;
step++;
np2 = this.get(t_m);
np3 = this.get(t_e);
arc = utils.getccenter(np1, np2, np3);
arc.interval = {
start: t_s,
end: t_e
};
let error = this._error(arc, np1, t_s, t_e);
curr_good = error <= errorThreshold;
done = prev_good && !curr_good;
if (!done)
prev_e = t_e;
if (curr_good) {
if (t_e >= 1) {
arc.interval.end = prev_e = 1;
prev_arc = arc;
if (t_e > 1) {
let d = {
x: arc.x + arc.r * cos2(arc.e),
y: arc.y + arc.r * sin2(arc.e)
};
arc.e += utils.angle({ x: arc.x, y: arc.y }, d, this.get(1));
}
break;
}
t_e = t_e + (t_e - t_s) / 2;
} else {
t_e = t_m;
}
} while (!done && safety++ < 100);
if (safety >= 100) {
break;
}
prev_arc = prev_arc ? prev_arc : arc;
circles.push(prev_arc);
t_s = prev_e;
} while (t_e < 1);
return circles;
}
};
module.exports = __toCommonJS(bezier_exports);
// Annotate the CommonJS export names for ESM import in node:
0 && (module.exports = {
Bezier
});