feature: vor und nachteile

praesentation/node_modules/d3-geo/src/path/area.js

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+import {Adder} from "d3-array";
+import {abs} from "../math.js";
+import noop from "../noop.js";
+
+var areaSum = new Adder(),
+    areaRingSum = new Adder(),
+    x00,
+    y00,
+    x0,
+    y0;
+
+var areaStream = {
+  point: noop,
+  lineStart: noop,
+  lineEnd: noop,
+  polygonStart: function() {
+    areaStream.lineStart = areaRingStart;
+    areaStream.lineEnd = areaRingEnd;
+  },
+  polygonEnd: function() {
+    areaStream.lineStart = areaStream.lineEnd = areaStream.point = noop;
+    areaSum.add(abs(areaRingSum));
+    areaRingSum = new Adder();
+  },
+  result: function() {
+    var area = areaSum / 2;
+    areaSum = new Adder();
+    return area;
+  }
+};
+
+function areaRingStart() {
+  areaStream.point = areaPointFirst;
+}
+
+function areaPointFirst(x, y) {
+  areaStream.point = areaPoint;
+  x00 = x0 = x, y00 = y0 = y;
+}
+
+function areaPoint(x, y) {
+  areaRingSum.add(y0 * x - x0 * y);
+  x0 = x, y0 = y;
+}
+
+function areaRingEnd() {
+  areaPoint(x00, y00);
+}
+
+export default areaStream;

praesentation/node_modules/d3-geo/src/path/bounds.js

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+import noop from "../noop.js";
+
+var x0 = Infinity,
+    y0 = x0,
+    x1 = -x0,
+    y1 = x1;
+
+var boundsStream = {
+  point: boundsPoint,
+  lineStart: noop,
+  lineEnd: noop,
+  polygonStart: noop,
+  polygonEnd: noop,
+  result: function() {
+    var bounds = [[x0, y0], [x1, y1]];
+    x1 = y1 = -(y0 = x0 = Infinity);
+    return bounds;
+  }
+};
+
+function boundsPoint(x, y) {
+  if (x < x0) x0 = x;
+  if (x > x1) x1 = x;
+  if (y < y0) y0 = y;
+  if (y > y1) y1 = y;
+}
+
+export default boundsStream;

praesentation/node_modules/d3-geo/src/path/centroid.js

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+import {sqrt} from "../math.js";
+
+// TODO Enforce positive area for exterior, negative area for interior?
+
+var X0 = 0,
+    Y0 = 0,
+    Z0 = 0,
+    X1 = 0,
+    Y1 = 0,
+    Z1 = 0,
+    X2 = 0,
+    Y2 = 0,
+    Z2 = 0,
+    x00,
+    y00,
+    x0,
+    y0;
+
+var centroidStream = {
+  point: centroidPoint,
+  lineStart: centroidLineStart,
+  lineEnd: centroidLineEnd,
+  polygonStart: function() {
+    centroidStream.lineStart = centroidRingStart;
+    centroidStream.lineEnd = centroidRingEnd;
+  },
+  polygonEnd: function() {
+    centroidStream.point = centroidPoint;
+    centroidStream.lineStart = centroidLineStart;
+    centroidStream.lineEnd = centroidLineEnd;
+  },
+  result: function() {
+    var centroid = Z2 ? [X2 / Z2, Y2 / Z2]
+        : Z1 ? [X1 / Z1, Y1 / Z1]
+        : Z0 ? [X0 / Z0, Y0 / Z0]
+        : [NaN, NaN];
+    X0 = Y0 = Z0 =
+    X1 = Y1 = Z1 =
+    X2 = Y2 = Z2 = 0;
+    return centroid;
+  }
+};
+
+function centroidPoint(x, y) {
+  X0 += x;
+  Y0 += y;
+  ++Z0;
+}
+
+function centroidLineStart() {
+  centroidStream.point = centroidPointFirstLine;
+}
+
+function centroidPointFirstLine(x, y) {
+  centroidStream.point = centroidPointLine;
+  centroidPoint(x0 = x, y0 = y);
+}
+
+function centroidPointLine(x, y) {
+  var dx = x - x0, dy = y - y0, z = sqrt(dx * dx + dy * dy);
+  X1 += z * (x0 + x) / 2;
+  Y1 += z * (y0 + y) / 2;
+  Z1 += z;
+  centroidPoint(x0 = x, y0 = y);
+}
+
+function centroidLineEnd() {
+  centroidStream.point = centroidPoint;
+}
+
+function centroidRingStart() {
+  centroidStream.point = centroidPointFirstRing;
+}
+
+function centroidRingEnd() {
+  centroidPointRing(x00, y00);
+}
+
+function centroidPointFirstRing(x, y) {
+  centroidStream.point = centroidPointRing;
+  centroidPoint(x00 = x0 = x, y00 = y0 = y);
+}
+
+function centroidPointRing(x, y) {
+  var dx = x - x0,
+      dy = y - y0,
+      z = sqrt(dx * dx + dy * dy);
+
+  X1 += z * (x0 + x) / 2;
+  Y1 += z * (y0 + y) / 2;
+  Z1 += z;
+
+  z = y0 * x - x0 * y;
+  X2 += z * (x0 + x);
+  Y2 += z * (y0 + y);
+  Z2 += z * 3;
+  centroidPoint(x0 = x, y0 = y);
+}
+
+export default centroidStream;

praesentation/node_modules/d3-geo/src/path/context.js

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+import {tau} from "../math.js";
+import noop from "../noop.js";
+
+export default function PathContext(context) {
+  this._context = context;
+}
+
+PathContext.prototype = {
+  _radius: 4.5,
+  pointRadius: function(_) {
+    return this._radius = _, this;
+  },
+  polygonStart: function() {
+    this._line = 0;
+  },
+  polygonEnd: function() {
+    this._line = NaN;
+  },
+  lineStart: function() {
+    this._point = 0;
+  },
+  lineEnd: function() {
+    if (this._line === 0) this._context.closePath();
+    this._point = NaN;
+  },
+  point: function(x, y) {
+    switch (this._point) {
+      case 0: {
+        this._context.moveTo(x, y);
+        this._point = 1;
+        break;
+      }
+      case 1: {
+        this._context.lineTo(x, y);
+        break;
+      }
+      default: {
+        this._context.moveTo(x + this._radius, y);
+        this._context.arc(x, y, this._radius, 0, tau);
+        break;
+      }
+    }
+  },
+  result: noop
+};

praesentation/node_modules/d3-geo/src/path/index.js

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+import identity from "../identity.js";
+import stream from "../stream.js";
+import pathArea from "./area.js";
+import pathBounds from "./bounds.js";
+import pathCentroid from "./centroid.js";
+import PathContext from "./context.js";
+import pathMeasure from "./measure.js";
+import PathString from "./string.js";
+
+export default function(projection, context) {
+  let digits = 3,
+      pointRadius = 4.5,
+      projectionStream,
+      contextStream;
+
+  function path(object) {
+    if (object) {
+      if (typeof pointRadius === "function") contextStream.pointRadius(+pointRadius.apply(this, arguments));
+      stream(object, projectionStream(contextStream));
+    }
+    return contextStream.result();
+  }
+
+  path.area = function(object) {
+    stream(object, projectionStream(pathArea));
+    return pathArea.result();
+  };
+
+  path.measure = function(object) {
+    stream(object, projectionStream(pathMeasure));
+    return pathMeasure.result();
+  };
+
+  path.bounds = function(object) {
+    stream(object, projectionStream(pathBounds));
+    return pathBounds.result();
+  };
+
+  path.centroid = function(object) {
+    stream(object, projectionStream(pathCentroid));
+    return pathCentroid.result();
+  };
+
+  path.projection = function(_) {
+    if (!arguments.length) return projection;
+    projectionStream = _ == null ? (projection = null, identity) : (projection = _).stream;
+    return path;
+  };
+
+  path.context = function(_) {
+    if (!arguments.length) return context;
+    contextStream = _ == null ? (context = null, new PathString(digits)) : new PathContext(context = _);
+    if (typeof pointRadius !== "function") contextStream.pointRadius(pointRadius);
+    return path;
+  };
+
+  path.pointRadius = function(_) {
+    if (!arguments.length) return pointRadius;
+    pointRadius = typeof _ === "function" ? _ : (contextStream.pointRadius(+_), +_);
+    return path;
+  };
+
+  path.digits = function(_) {
+    if (!arguments.length) return digits;
+    if (_ == null) digits = null;
+    else {
+      const d = Math.floor(_);
+      if (!(d >= 0)) throw new RangeError(`invalid digits: ${_}`);
+      digits = d;
+    }
+    if (context === null) contextStream = new PathString(digits);
+    return path;
+  };
+
+  return path.projection(projection).digits(digits).context(context);
+}

praesentation/node_modules/d3-geo/src/path/measure.js

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+import {Adder} from "d3-array";
+import {sqrt} from "../math.js";
+import noop from "../noop.js";
+
+var lengthSum = new Adder(),
+    lengthRing,
+    x00,
+    y00,
+    x0,
+    y0;
+
+var lengthStream = {
+  point: noop,
+  lineStart: function() {
+    lengthStream.point = lengthPointFirst;
+  },
+  lineEnd: function() {
+    if (lengthRing) lengthPoint(x00, y00);
+    lengthStream.point = noop;
+  },
+  polygonStart: function() {
+    lengthRing = true;
+  },
+  polygonEnd: function() {
+    lengthRing = null;
+  },
+  result: function() {
+    var length = +lengthSum;
+    lengthSum = new Adder();
+    return length;
+  }
+};
+
+function lengthPointFirst(x, y) {
+  lengthStream.point = lengthPoint;
+  x00 = x0 = x, y00 = y0 = y;
+}
+
+function lengthPoint(x, y) {
+  x0 -= x, y0 -= y;
+  lengthSum.add(sqrt(x0 * x0 + y0 * y0));
+  x0 = x, y0 = y;
+}
+
+export default lengthStream;

praesentation/node_modules/d3-geo/src/path/string.js

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+// Simple caching for constant-radius points.
+let cacheDigits, cacheAppend, cacheRadius, cacheCircle;
+
+export default class PathString {
+  constructor(digits) {
+    this._append = digits == null ? append : appendRound(digits);
+    this._radius = 4.5;
+    this._ = "";
+  }
+  pointRadius(_) {
+    this._radius = +_;
+    return this;
+  }
+  polygonStart() {
+    this._line = 0;
+  }
+  polygonEnd() {
+    this._line = NaN;
+  }
+  lineStart() {
+    this._point = 0;
+  }
+  lineEnd() {
+    if (this._line === 0) this._ += "Z";
+    this._point = NaN;
+  }
+  point(x, y) {
+    switch (this._point) {
+      case 0: {
+        this._append`M${x},${y}`;
+        this._point = 1;
+        break;
+      }
+      case 1: {
+        this._append`L${x},${y}`;
+        break;
+      }
+      default: {
+        this._append`M${x},${y}`;
+        if (this._radius !== cacheRadius || this._append !== cacheAppend) {
+          const r = this._radius;
+          const s = this._;
+          this._ = ""; // stash the old string so we can cache the circle path fragment
+          this._append`m0,${r}a${r},${r} 0 1,1 0,${-2 * r}a${r},${r} 0 1,1 0,${2 * r}z`;
+          cacheRadius = r;
+          cacheAppend = this._append;
+          cacheCircle = this._;
+          this._ = s;
+        }
+        this._ += cacheCircle;
+        break;
+      }
+    }
+  }
+  result() {
+    const result = this._;
+    this._ = "";
+    return result.length ? result : null;
+  }
+}
+
+function append(strings) {
+  let i = 1;
+  this._ += strings[0];
+  for (const j = strings.length; i < j; ++i) {
+    this._ += arguments[i] + strings[i];
+  }
+}
+
+function appendRound(digits) {
+  const d = Math.floor(digits);
+  if (!(d >= 0)) throw new RangeError(`invalid digits: ${digits}`);
+  if (d > 15) return append;
+  if (d !== cacheDigits) {
+    const k = 10 ** d;
+    cacheDigits = d;
+    cacheAppend = function append(strings) {
+      let i = 1;
+      this._ += strings[0];
+      for (const j = strings.length; i < j; ++i) {
+        this._ += Math.round(arguments[i] * k) / k + strings[i];
+      }
+    };
+  }
+  return cacheAppend;
+}