/ var / www / html / cqt / node_modules / d3-shape / src / curve / [ HOME SHELL ]

Name	Size	Permission	Action
basis.js	1.41 KB	-rw-r--r--
basisClosed.js	1.5 KB	-rw-r--r--
basisOpen.js	1.05 KB	-rw-r--r--
bump.js	1.71 KB	-rw-r--r--
bundle.js	1.06 KB	-rw-r--r--
cardinal.js	1.6 KB	-rw-r--r--
cardinalClosed.js	1.57 KB	-rw-r--r--
cardinalOpen.js	1.27 KB	-rw-r--r--
catmullRom.js	2.59 KB	-rw-r--r--
catmullRomClosed.js	2.04 KB	-rw-r--r--
catmullRomOpen.js	1.73 KB	-rw-r--r--
linear.js	744 B	-rw-r--r--
linearClosed.js	517 B	-rw-r--r--
monotone.js	3.13 KB	-rw-r--r--
natural.js	1.72 KB	-rw-r--r--
radial.js	658 B	-rw-r--r--
step.js	1.34 KB	-rw-r--r--

Code Editor : catmullRom.js

import {epsilon} from "../math.js";
import {Cardinal} from "./cardinal.js";

export function point(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; // falls through
      default: point(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;
  }
};

export default (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);

Urban Research Lab

Urban Research Lab

The Urban Research Lab (URL) at IIIT-Delhi was established in 2020, during a time when the pandemic brought the complexities of urban life more visible than ever. What started as an initiative by faculty and students has grown into a collaborative space for critically exploring and reimagining the urban questions through research, dialogue, and interdisciplinary engagement.