webcola
Version:
WebCola =======
424 lines • 13.6 kB
JavaScript
"use strict";
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
Object.defineProperty(exports, "__esModule", { value: true });
var rectangle_1 = require("./rectangle");
var Point = (function () {
function Point() {
}
return Point;
}());
exports.Point = Point;
var LineSegment = (function () {
function LineSegment(x1, y1, x2, y2) {
this.x1 = x1;
this.y1 = y1;
this.x2 = x2;
this.y2 = y2;
}
return LineSegment;
}());
exports.LineSegment = LineSegment;
var PolyPoint = (function (_super) {
__extends(PolyPoint, _super);
function PolyPoint() {
return _super !== null && _super.apply(this, arguments) || this;
}
return PolyPoint;
}(Point));
exports.PolyPoint = PolyPoint;
function isLeft(P0, P1, P2) {
return (P1.x - P0.x) * (P2.y - P0.y) - (P2.x - P0.x) * (P1.y - P0.y);
}
exports.isLeft = isLeft;
function above(p, vi, vj) {
return isLeft(p, vi, vj) > 0;
}
function below(p, vi, vj) {
return isLeft(p, vi, vj) < 0;
}
function ConvexHull(S) {
var P = S.slice(0).sort(function (a, b) { return a.x !== b.x ? b.x - a.x : b.y - a.y; });
var n = S.length, i;
var minmin = 0;
var xmin = P[0].x;
for (i = 1; i < n; ++i) {
if (P[i].x !== xmin)
break;
}
var minmax = i - 1;
var H = [];
H.push(P[minmin]);
if (minmax === n - 1) {
if (P[minmax].y !== P[minmin].y)
H.push(P[minmax]);
}
else {
var maxmin, maxmax = n - 1;
var xmax = P[n - 1].x;
for (i = n - 2; i >= 0; i--)
if (P[i].x !== xmax)
break;
maxmin = i + 1;
i = minmax;
while (++i <= maxmin) {
if (isLeft(P[minmin], P[maxmin], P[i]) >= 0 && i < maxmin)
continue;
while (H.length > 1) {
if (isLeft(H[H.length - 2], H[H.length - 1], P[i]) > 0)
break;
else
H.length -= 1;
}
if (i != minmin)
H.push(P[i]);
}
if (maxmax != maxmin)
H.push(P[maxmax]);
var bot = H.length;
i = maxmin;
while (--i >= minmax) {
if (isLeft(P[maxmax], P[minmax], P[i]) >= 0 && i > minmax)
continue;
while (H.length > bot) {
if (isLeft(H[H.length - 2], H[H.length - 1], P[i]) > 0)
break;
else
H.length -= 1;
}
if (i != minmin)
H.push(P[i]);
}
}
return H;
}
exports.ConvexHull = ConvexHull;
function clockwiseRadialSweep(p, P, f) {
P.slice(0).sort(function (a, b) { return Math.atan2(a.y - p.y, a.x - p.x) - Math.atan2(b.y - p.y, b.x - p.x); }).forEach(f);
}
exports.clockwiseRadialSweep = clockwiseRadialSweep;
function nextPolyPoint(p, ps) {
if (p.polyIndex === ps.length - 1)
return ps[0];
return ps[p.polyIndex + 1];
}
function prevPolyPoint(p, ps) {
if (p.polyIndex === 0)
return ps[ps.length - 1];
return ps[p.polyIndex - 1];
}
function tangent_PointPolyC(P, V) {
var Vclosed = V.slice(0);
Vclosed.push(V[0]);
return { rtan: Rtangent_PointPolyC(P, Vclosed), ltan: Ltangent_PointPolyC(P, Vclosed) };
}
function Rtangent_PointPolyC(P, V) {
var n = V.length - 1;
var a, b, c;
var upA, dnC;
if (below(P, V[1], V[0]) && !above(P, V[n - 1], V[0]))
return 0;
for (a = 0, b = n;;) {
if (b - a === 1)
if (above(P, V[a], V[b]))
return a;
else
return b;
c = Math.floor((a + b) / 2);
dnC = below(P, V[c + 1], V[c]);
if (dnC && !above(P, V[c - 1], V[c]))
return c;
upA = above(P, V[a + 1], V[a]);
if (upA) {
if (dnC)
b = c;
else {
if (above(P, V[a], V[c]))
b = c;
else
a = c;
}
}
else {
if (!dnC)
a = c;
else {
if (below(P, V[a], V[c]))
b = c;
else
a = c;
}
}
}
}
function Ltangent_PointPolyC(P, V) {
var n = V.length - 1;
var a, b, c;
var dnA, dnC;
if (above(P, V[n - 1], V[0]) && !below(P, V[1], V[0]))
return 0;
for (a = 0, b = n;;) {
if (b - a === 1)
if (below(P, V[a], V[b]))
return a;
else
return b;
c = Math.floor((a + b) / 2);
dnC = below(P, V[c + 1], V[c]);
if (above(P, V[c - 1], V[c]) && !dnC)
return c;
dnA = below(P, V[a + 1], V[a]);
if (dnA) {
if (!dnC)
b = c;
else {
if (below(P, V[a], V[c]))
b = c;
else
a = c;
}
}
else {
if (dnC)
a = c;
else {
if (above(P, V[a], V[c]))
b = c;
else
a = c;
}
}
}
}
function tangent_PolyPolyC(V, W, t1, t2, cmp1, cmp2) {
var ix1, ix2;
ix1 = t1(W[0], V);
ix2 = t2(V[ix1], W);
var done = false;
while (!done) {
done = true;
while (true) {
if (ix1 === V.length - 1)
ix1 = 0;
if (cmp1(W[ix2], V[ix1], V[ix1 + 1]))
break;
++ix1;
}
while (true) {
if (ix2 === 0)
ix2 = W.length - 1;
if (cmp2(V[ix1], W[ix2], W[ix2 - 1]))
break;
--ix2;
done = false;
}
}
return { t1: ix1, t2: ix2 };
}
exports.tangent_PolyPolyC = tangent_PolyPolyC;
function LRtangent_PolyPolyC(V, W) {
var rl = RLtangent_PolyPolyC(W, V);
return { t1: rl.t2, t2: rl.t1 };
}
exports.LRtangent_PolyPolyC = LRtangent_PolyPolyC;
function RLtangent_PolyPolyC(V, W) {
return tangent_PolyPolyC(V, W, Rtangent_PointPolyC, Ltangent_PointPolyC, above, below);
}
exports.RLtangent_PolyPolyC = RLtangent_PolyPolyC;
function LLtangent_PolyPolyC(V, W) {
return tangent_PolyPolyC(V, W, Ltangent_PointPolyC, Ltangent_PointPolyC, below, below);
}
exports.LLtangent_PolyPolyC = LLtangent_PolyPolyC;
function RRtangent_PolyPolyC(V, W) {
return tangent_PolyPolyC(V, W, Rtangent_PointPolyC, Rtangent_PointPolyC, above, above);
}
exports.RRtangent_PolyPolyC = RRtangent_PolyPolyC;
var BiTangent = (function () {
function BiTangent(t1, t2) {
this.t1 = t1;
this.t2 = t2;
}
return BiTangent;
}());
exports.BiTangent = BiTangent;
var BiTangents = (function () {
function BiTangents() {
}
return BiTangents;
}());
exports.BiTangents = BiTangents;
var TVGPoint = (function (_super) {
__extends(TVGPoint, _super);
function TVGPoint() {
return _super !== null && _super.apply(this, arguments) || this;
}
return TVGPoint;
}(Point));
exports.TVGPoint = TVGPoint;
var VisibilityVertex = (function () {
function VisibilityVertex(id, polyid, polyvertid, p) {
this.id = id;
this.polyid = polyid;
this.polyvertid = polyvertid;
this.p = p;
p.vv = this;
}
return VisibilityVertex;
}());
exports.VisibilityVertex = VisibilityVertex;
var VisibilityEdge = (function () {
function VisibilityEdge(source, target) {
this.source = source;
this.target = target;
}
VisibilityEdge.prototype.length = function () {
var dx = this.source.p.x - this.target.p.x;
var dy = this.source.p.y - this.target.p.y;
return Math.sqrt(dx * dx + dy * dy);
};
return VisibilityEdge;
}());
exports.VisibilityEdge = VisibilityEdge;
var TangentVisibilityGraph = (function () {
function TangentVisibilityGraph(P, g0) {
this.P = P;
this.V = [];
this.E = [];
if (!g0) {
var n = P.length;
for (var i = 0; i < n; i++) {
var p = P[i];
for (var j = 0; j < p.length; ++j) {
var pj = p[j], vv = new VisibilityVertex(this.V.length, i, j, pj);
this.V.push(vv);
if (j > 0)
this.E.push(new VisibilityEdge(p[j - 1].vv, vv));
}
if (p.length > 1)
this.E.push(new VisibilityEdge(p[0].vv, p[p.length - 1].vv));
}
for (var i = 0; i < n - 1; i++) {
var Pi = P[i];
for (var j = i + 1; j < n; j++) {
var Pj = P[j], t = tangents(Pi, Pj);
for (var q in t) {
var c = t[q], source = Pi[c.t1], target = Pj[c.t2];
this.addEdgeIfVisible(source, target, i, j);
}
}
}
}
else {
this.V = g0.V.slice(0);
this.E = g0.E.slice(0);
}
}
TangentVisibilityGraph.prototype.addEdgeIfVisible = function (u, v, i1, i2) {
if (!this.intersectsPolys(new LineSegment(u.x, u.y, v.x, v.y), i1, i2)) {
this.E.push(new VisibilityEdge(u.vv, v.vv));
}
};
TangentVisibilityGraph.prototype.addPoint = function (p, i1) {
var n = this.P.length;
this.V.push(new VisibilityVertex(this.V.length, n, 0, p));
for (var i = 0; i < n; ++i) {
if (i === i1)
continue;
var poly = this.P[i], t = tangent_PointPolyC(p, poly);
this.addEdgeIfVisible(p, poly[t.ltan], i1, i);
this.addEdgeIfVisible(p, poly[t.rtan], i1, i);
}
return p.vv;
};
TangentVisibilityGraph.prototype.intersectsPolys = function (l, i1, i2) {
for (var i = 0, n = this.P.length; i < n; ++i) {
if (i != i1 && i != i2 && intersects(l, this.P[i]).length > 0) {
return true;
}
}
return false;
};
return TangentVisibilityGraph;
}());
exports.TangentVisibilityGraph = TangentVisibilityGraph;
function intersects(l, P) {
var ints = [];
for (var i = 1, n = P.length; i < n; ++i) {
var int = rectangle_1.Rectangle.lineIntersection(l.x1, l.y1, l.x2, l.y2, P[i - 1].x, P[i - 1].y, P[i].x, P[i].y);
if (int)
ints.push(int);
}
return ints;
}
function tangents(V, W) {
var m = V.length - 1, n = W.length - 1;
var bt = new BiTangents();
for (var i = 0; i < m; ++i) {
for (var j = 0; j < n; ++j) {
var v1 = V[i == 0 ? m - 1 : i - 1];
var v2 = V[i];
var v3 = V[i + 1];
var w1 = W[j == 0 ? n - 1 : j - 1];
var w2 = W[j];
var w3 = W[j + 1];
var v1v2w2 = isLeft(v1, v2, w2);
var v2w1w2 = isLeft(v2, w1, w2);
var v2w2w3 = isLeft(v2, w2, w3);
var w1w2v2 = isLeft(w1, w2, v2);
var w2v1v2 = isLeft(w2, v1, v2);
var w2v2v3 = isLeft(w2, v2, v3);
if (v1v2w2 >= 0 && v2w1w2 >= 0 && v2w2w3 < 0
&& w1w2v2 >= 0 && w2v1v2 >= 0 && w2v2v3 < 0) {
bt.ll = new BiTangent(i, j);
}
else if (v1v2w2 <= 0 && v2w1w2 <= 0 && v2w2w3 > 0
&& w1w2v2 <= 0 && w2v1v2 <= 0 && w2v2v3 > 0) {
bt.rr = new BiTangent(i, j);
}
else if (v1v2w2 <= 0 && v2w1w2 > 0 && v2w2w3 <= 0
&& w1w2v2 >= 0 && w2v1v2 < 0 && w2v2v3 >= 0) {
bt.rl = new BiTangent(i, j);
}
else if (v1v2w2 >= 0 && v2w1w2 < 0 && v2w2w3 >= 0
&& w1w2v2 <= 0 && w2v1v2 > 0 && w2v2v3 <= 0) {
bt.lr = new BiTangent(i, j);
}
}
}
return bt;
}
exports.tangents = tangents;
function isPointInsidePoly(p, poly) {
for (var i = 1, n = poly.length; i < n; ++i)
if (below(poly[i - 1], poly[i], p))
return false;
return true;
}
function isAnyPInQ(p, q) {
return !p.every(function (v) { return !isPointInsidePoly(v, q); });
}
function polysOverlap(p, q) {
if (isAnyPInQ(p, q))
return true;
if (isAnyPInQ(q, p))
return true;
for (var i = 1, n = p.length; i < n; ++i) {
var v = p[i], u = p[i - 1];
if (intersects(new LineSegment(u.x, u.y, v.x, v.y), q).length > 0)
return true;
}
return false;
}
exports.polysOverlap = polysOverlap;
//# sourceMappingURL=geom.js.map