leaflet-measure
Version:
Coordinate, linear, and area measure tool for Leaflet maps
1,914 lines (1,677 loc) • 175 kB
JavaScript
(function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
/* MIT license */
var convert = require("color-convert"),
string = require("color-string");
var Color = function(obj) {
if (obj instanceof Color) return obj;
if (! (this instanceof Color)) return new Color(obj);
this.values = {
rgb: [0, 0, 0],
hsl: [0, 0, 0],
hsv: [0, 0, 0],
hwb: [0, 0, 0],
cmyk: [0, 0, 0, 0],
alpha: 1
}
// parse Color() argument
if (typeof obj == "string") {
var vals = string.getRgba(obj);
if (vals) {
this.setValues("rgb", vals);
}
else if(vals = string.getHsla(obj)) {
this.setValues("hsl", vals);
}
else if(vals = string.getHwb(obj)) {
this.setValues("hwb", vals);
}
else {
throw new Error("Unable to parse color from string \"" + obj + "\"");
}
}
else if (typeof obj == "object") {
var vals = obj;
if(vals["r"] !== undefined || vals["red"] !== undefined) {
this.setValues("rgb", vals)
}
else if(vals["l"] !== undefined || vals["lightness"] !== undefined) {
this.setValues("hsl", vals)
}
else if(vals["v"] !== undefined || vals["value"] !== undefined) {
this.setValues("hsv", vals)
}
else if(vals["w"] !== undefined || vals["whiteness"] !== undefined) {
this.setValues("hwb", vals)
}
else if(vals["c"] !== undefined || vals["cyan"] !== undefined) {
this.setValues("cmyk", vals)
}
else {
throw new Error("Unable to parse color from object " + JSON.stringify(obj));
}
}
}
Color.prototype = {
rgb: function (vals) {
return this.setSpace("rgb", arguments);
},
hsl: function(vals) {
return this.setSpace("hsl", arguments);
},
hsv: function(vals) {
return this.setSpace("hsv", arguments);
},
hwb: function(vals) {
return this.setSpace("hwb", arguments);
},
cmyk: function(vals) {
return this.setSpace("cmyk", arguments);
},
rgbArray: function() {
return this.values.rgb;
},
hslArray: function() {
return this.values.hsl;
},
hsvArray: function() {
return this.values.hsv;
},
hwbArray: function() {
if (this.values.alpha !== 1) {
return this.values.hwb.concat([this.values.alpha])
}
return this.values.hwb;
},
cmykArray: function() {
return this.values.cmyk;
},
rgbaArray: function() {
var rgb = this.values.rgb;
return rgb.concat([this.values.alpha]);
},
hslaArray: function() {
var hsl = this.values.hsl;
return hsl.concat([this.values.alpha]);
},
alpha: function(val) {
if (val === undefined) {
return this.values.alpha;
}
this.setValues("alpha", val);
return this;
},
red: function(val) {
return this.setChannel("rgb", 0, val);
},
green: function(val) {
return this.setChannel("rgb", 1, val);
},
blue: function(val) {
return this.setChannel("rgb", 2, val);
},
hue: function(val) {
return this.setChannel("hsl", 0, val);
},
saturation: function(val) {
return this.setChannel("hsl", 1, val);
},
lightness: function(val) {
return this.setChannel("hsl", 2, val);
},
saturationv: function(val) {
return this.setChannel("hsv", 1, val);
},
whiteness: function(val) {
return this.setChannel("hwb", 1, val);
},
blackness: function(val) {
return this.setChannel("hwb", 2, val);
},
value: function(val) {
return this.setChannel("hsv", 2, val);
},
cyan: function(val) {
return this.setChannel("cmyk", 0, val);
},
magenta: function(val) {
return this.setChannel("cmyk", 1, val);
},
yellow: function(val) {
return this.setChannel("cmyk", 2, val);
},
black: function(val) {
return this.setChannel("cmyk", 3, val);
},
hexString: function() {
return string.hexString(this.values.rgb);
},
rgbString: function() {
return string.rgbString(this.values.rgb, this.values.alpha);
},
rgbaString: function() {
return string.rgbaString(this.values.rgb, this.values.alpha);
},
percentString: function() {
return string.percentString(this.values.rgb, this.values.alpha);
},
hslString: function() {
return string.hslString(this.values.hsl, this.values.alpha);
},
hslaString: function() {
return string.hslaString(this.values.hsl, this.values.alpha);
},
hwbString: function() {
return string.hwbString(this.values.hwb, this.values.alpha);
},
keyword: function() {
return string.keyword(this.values.rgb, this.values.alpha);
},
rgbNumber: function() {
return (this.values.rgb[0] << 16) | (this.values.rgb[1] << 8) | this.values.rgb[2];
},
luminosity: function() {
// http://www.w3.org/TR/WCAG20/#relativeluminancedef
var rgb = this.values.rgb;
var lum = [];
for (var i = 0; i < rgb.length; i++) {
var chan = rgb[i] / 255;
lum[i] = (chan <= 0.03928) ? chan / 12.92
: Math.pow(((chan + 0.055) / 1.055), 2.4)
}
return 0.2126 * lum[0] + 0.7152 * lum[1] + 0.0722 * lum[2];
},
contrast: function(color2) {
// http://www.w3.org/TR/WCAG20/#contrast-ratiodef
var lum1 = this.luminosity();
var lum2 = color2.luminosity();
if (lum1 > lum2) {
return (lum1 + 0.05) / (lum2 + 0.05)
};
return (lum2 + 0.05) / (lum1 + 0.05);
},
level: function(color2) {
var contrastRatio = this.contrast(color2);
return (contrastRatio >= 7.1)
? 'AAA'
: (contrastRatio >= 4.5)
? 'AA'
: '';
},
dark: function() {
// YIQ equation from http://24ways.org/2010/calculating-color-contrast
var rgb = this.values.rgb,
yiq = (rgb[0] * 299 + rgb[1] * 587 + rgb[2] * 114) / 1000;
return yiq < 128;
},
light: function() {
return !this.dark();
},
negate: function() {
var rgb = []
for (var i = 0; i < 3; i++) {
rgb[i] = 255 - this.values.rgb[i];
}
this.setValues("rgb", rgb);
return this;
},
lighten: function(ratio) {
this.values.hsl[2] += this.values.hsl[2] * ratio;
this.setValues("hsl", this.values.hsl);
return this;
},
darken: function(ratio) {
this.values.hsl[2] -= this.values.hsl[2] * ratio;
this.setValues("hsl", this.values.hsl);
return this;
},
saturate: function(ratio) {
this.values.hsl[1] += this.values.hsl[1] * ratio;
this.setValues("hsl", this.values.hsl);
return this;
},
desaturate: function(ratio) {
this.values.hsl[1] -= this.values.hsl[1] * ratio;
this.setValues("hsl", this.values.hsl);
return this;
},
whiten: function(ratio) {
this.values.hwb[1] += this.values.hwb[1] * ratio;
this.setValues("hwb", this.values.hwb);
return this;
},
blacken: function(ratio) {
this.values.hwb[2] += this.values.hwb[2] * ratio;
this.setValues("hwb", this.values.hwb);
return this;
},
greyscale: function() {
var rgb = this.values.rgb;
// http://en.wikipedia.org/wiki/Grayscale#Converting_color_to_grayscale
var val = rgb[0] * 0.3 + rgb[1] * 0.59 + rgb[2] * 0.11;
this.setValues("rgb", [val, val, val]);
return this;
},
clearer: function(ratio) {
this.setValues("alpha", this.values.alpha - (this.values.alpha * ratio));
return this;
},
opaquer: function(ratio) {
this.setValues("alpha", this.values.alpha + (this.values.alpha * ratio));
return this;
},
rotate: function(degrees) {
var hue = this.values.hsl[0];
hue = (hue + degrees) % 360;
hue = hue < 0 ? 360 + hue : hue;
this.values.hsl[0] = hue;
this.setValues("hsl", this.values.hsl);
return this;
},
mix: function(color2, weight) {
weight = 1 - (weight == null ? 0.5 : weight);
// algorithm from Sass's mix(). Ratio of first color in mix is
// determined by the alphas of both colors and the weight
var t1 = weight * 2 - 1,
d = this.alpha() - color2.alpha();
var weight1 = (((t1 * d == -1) ? t1 : (t1 + d) / (1 + t1 * d)) + 1) / 2;
var weight2 = 1 - weight1;
var rgb = this.rgbArray();
var rgb2 = color2.rgbArray();
for (var i = 0; i < rgb.length; i++) {
rgb[i] = rgb[i] * weight1 + rgb2[i] * weight2;
}
this.setValues("rgb", rgb);
var alpha = this.alpha() * weight + color2.alpha() * (1 - weight);
this.setValues("alpha", alpha);
return this;
},
toJSON: function() {
return this.rgb();
},
clone: function() {
return new Color(this.rgb());
}
}
Color.prototype.getValues = function(space) {
var vals = {};
for (var i = 0; i < space.length; i++) {
vals[space.charAt(i)] = this.values[space][i];
}
if (this.values.alpha != 1) {
vals["a"] = this.values.alpha;
}
// {r: 255, g: 255, b: 255, a: 0.4}
return vals;
}
Color.prototype.setValues = function(space, vals) {
var spaces = {
"rgb": ["red", "green", "blue"],
"hsl": ["hue", "saturation", "lightness"],
"hsv": ["hue", "saturation", "value"],
"hwb": ["hue", "whiteness", "blackness"],
"cmyk": ["cyan", "magenta", "yellow", "black"]
};
var maxes = {
"rgb": [255, 255, 255],
"hsl": [360, 100, 100],
"hsv": [360, 100, 100],
"hwb": [360, 100, 100],
"cmyk": [100, 100, 100, 100]
};
var alpha = 1;
if (space == "alpha") {
alpha = vals;
}
else if (vals.length) {
// [10, 10, 10]
this.values[space] = vals.slice(0, space.length);
alpha = vals[space.length];
}
else if (vals[space.charAt(0)] !== undefined) {
// {r: 10, g: 10, b: 10}
for (var i = 0; i < space.length; i++) {
this.values[space][i] = vals[space.charAt(i)];
}
alpha = vals.a;
}
else if (vals[spaces[space][0]] !== undefined) {
// {red: 10, green: 10, blue: 10}
var chans = spaces[space];
for (var i = 0; i < space.length; i++) {
this.values[space][i] = vals[chans[i]];
}
alpha = vals.alpha;
}
this.values.alpha = Math.max(0, Math.min(1, (alpha !== undefined ? alpha : this.values.alpha) ));
if (space == "alpha") {
return;
}
// cap values of the space prior converting all values
for (var i = 0; i < space.length; i++) {
var capped = Math.max(0, Math.min(maxes[space][i], this.values[space][i]));
this.values[space][i] = Math.round(capped);
}
// convert to all the other color spaces
for (var sname in spaces) {
if (sname != space) {
this.values[sname] = convert[space][sname](this.values[space])
}
// cap values
for (var i = 0; i < sname.length; i++) {
var capped = Math.max(0, Math.min(maxes[sname][i], this.values[sname][i]));
this.values[sname][i] = Math.round(capped);
}
}
return true;
}
Color.prototype.setSpace = function(space, args) {
var vals = args[0];
if (vals === undefined) {
// color.rgb()
return this.getValues(space);
}
// color.rgb(10, 10, 10)
if (typeof vals == "number") {
vals = Array.prototype.slice.call(args);
}
this.setValues(space, vals);
return this;
}
Color.prototype.setChannel = function(space, index, val) {
if (val === undefined) {
// color.red()
return this.values[space][index];
}
// color.red(100)
this.values[space][index] = val;
this.setValues(space, this.values[space]);
return this;
}
module.exports = Color;
},{"color-convert":3,"color-string":4}],2:[function(require,module,exports){
/* MIT license */
module.exports = {
rgb2hsl: rgb2hsl,
rgb2hsv: rgb2hsv,
rgb2hwb: rgb2hwb,
rgb2cmyk: rgb2cmyk,
rgb2keyword: rgb2keyword,
rgb2xyz: rgb2xyz,
rgb2lab: rgb2lab,
rgb2lch: rgb2lch,
hsl2rgb: hsl2rgb,
hsl2hsv: hsl2hsv,
hsl2hwb: hsl2hwb,
hsl2cmyk: hsl2cmyk,
hsl2keyword: hsl2keyword,
hsv2rgb: hsv2rgb,
hsv2hsl: hsv2hsl,
hsv2hwb: hsv2hwb,
hsv2cmyk: hsv2cmyk,
hsv2keyword: hsv2keyword,
hwb2rgb: hwb2rgb,
hwb2hsl: hwb2hsl,
hwb2hsv: hwb2hsv,
hwb2cmyk: hwb2cmyk,
hwb2keyword: hwb2keyword,
cmyk2rgb: cmyk2rgb,
cmyk2hsl: cmyk2hsl,
cmyk2hsv: cmyk2hsv,
cmyk2hwb: cmyk2hwb,
cmyk2keyword: cmyk2keyword,
keyword2rgb: keyword2rgb,
keyword2hsl: keyword2hsl,
keyword2hsv: keyword2hsv,
keyword2hwb: keyword2hwb,
keyword2cmyk: keyword2cmyk,
keyword2lab: keyword2lab,
keyword2xyz: keyword2xyz,
xyz2rgb: xyz2rgb,
xyz2lab: xyz2lab,
xyz2lch: xyz2lch,
lab2xyz: lab2xyz,
lab2rgb: lab2rgb,
lab2lch: lab2lch,
lch2lab: lch2lab,
lch2xyz: lch2xyz,
lch2rgb: lch2rgb
}
function rgb2hsl(rgb) {
var r = rgb[0]/255,
g = rgb[1]/255,
b = rgb[2]/255,
min = Math.min(r, g, b),
max = Math.max(r, g, b),
delta = max - min,
h, s, l;
if (max == min)
h = 0;
else if (r == max)
h = (g - b) / delta;
else if (g == max)
h = 2 + (b - r) / delta;
else if (b == max)
h = 4 + (r - g)/ delta;
h = Math.min(h * 60, 360);
if (h < 0)
h += 360;
l = (min + max) / 2;
if (max == min)
s = 0;
else if (l <= 0.5)
s = delta / (max + min);
else
s = delta / (2 - max - min);
return [h, s * 100, l * 100];
}
function rgb2hsv(rgb) {
var r = rgb[0],
g = rgb[1],
b = rgb[2],
min = Math.min(r, g, b),
max = Math.max(r, g, b),
delta = max - min,
h, s, v;
if (max == 0)
s = 0;
else
s = (delta/max * 1000)/10;
if (max == min)
h = 0;
else if (r == max)
h = (g - b) / delta;
else if (g == max)
h = 2 + (b - r) / delta;
else if (b == max)
h = 4 + (r - g) / delta;
h = Math.min(h * 60, 360);
if (h < 0)
h += 360;
v = ((max / 255) * 1000) / 10;
return [h, s, v];
}
function rgb2hwb(rgb) {
var r = rgb[0],
g = rgb[1],
b = rgb[2],
h = rgb2hsl(rgb)[0],
w = 1/255 * Math.min(r, Math.min(g, b)),
b = 1 - 1/255 * Math.max(r, Math.max(g, b));
return [h, w * 100, b * 100];
}
function rgb2cmyk(rgb) {
var r = rgb[0] / 255,
g = rgb[1] / 255,
b = rgb[2] / 255,
c, m, y, k;
k = Math.min(1 - r, 1 - g, 1 - b);
c = (1 - r - k) / (1 - k) || 0;
m = (1 - g - k) / (1 - k) || 0;
y = (1 - b - k) / (1 - k) || 0;
return [c * 100, m * 100, y * 100, k * 100];
}
function rgb2keyword(rgb) {
return reverseKeywords[JSON.stringify(rgb)];
}
function rgb2xyz(rgb) {
var r = rgb[0] / 255,
g = rgb[1] / 255,
b = rgb[2] / 255;
// assume sRGB
r = r > 0.04045 ? Math.pow(((r + 0.055) / 1.055), 2.4) : (r / 12.92);
g = g > 0.04045 ? Math.pow(((g + 0.055) / 1.055), 2.4) : (g / 12.92);
b = b > 0.04045 ? Math.pow(((b + 0.055) / 1.055), 2.4) : (b / 12.92);
var x = (r * 0.4124) + (g * 0.3576) + (b * 0.1805);
var y = (r * 0.2126) + (g * 0.7152) + (b * 0.0722);
var z = (r * 0.0193) + (g * 0.1192) + (b * 0.9505);
return [x * 100, y *100, z * 100];
}
function rgb2lab(rgb) {
var xyz = rgb2xyz(rgb),
x = xyz[0],
y = xyz[1],
z = xyz[2],
l, a, b;
x /= 95.047;
y /= 100;
z /= 108.883;
x = x > 0.008856 ? Math.pow(x, 1/3) : (7.787 * x) + (16 / 116);
y = y > 0.008856 ? Math.pow(y, 1/3) : (7.787 * y) + (16 / 116);
z = z > 0.008856 ? Math.pow(z, 1/3) : (7.787 * z) + (16 / 116);
l = (116 * y) - 16;
a = 500 * (x - y);
b = 200 * (y - z);
return [l, a, b];
}
function rgb2lch(args) {
return lab2lch(rgb2lab(args));
}
function hsl2rgb(hsl) {
var h = hsl[0] / 360,
s = hsl[1] / 100,
l = hsl[2] / 100,
t1, t2, t3, rgb, val;
if (s == 0) {
val = l * 255;
return [val, val, val];
}
if (l < 0.5)
t2 = l * (1 + s);
else
t2 = l + s - l * s;
t1 = 2 * l - t2;
rgb = [0, 0, 0];
for (var i = 0; i < 3; i++) {
t3 = h + 1 / 3 * - (i - 1);
t3 < 0 && t3++;
t3 > 1 && t3--;
if (6 * t3 < 1)
val = t1 + (t2 - t1) * 6 * t3;
else if (2 * t3 < 1)
val = t2;
else if (3 * t3 < 2)
val = t1 + (t2 - t1) * (2 / 3 - t3) * 6;
else
val = t1;
rgb[i] = val * 255;
}
return rgb;
}
function hsl2hsv(hsl) {
var h = hsl[0],
s = hsl[1] / 100,
l = hsl[2] / 100,
sv, v;
l *= 2;
s *= (l <= 1) ? l : 2 - l;
v = (l + s) / 2;
sv = (2 * s) / (l + s);
return [h, sv * 100, v * 100];
}
function hsl2hwb(args) {
return rgb2hwb(hsl2rgb(args));
}
function hsl2cmyk(args) {
return rgb2cmyk(hsl2rgb(args));
}
function hsl2keyword(args) {
return rgb2keyword(hsl2rgb(args));
}
function hsv2rgb(hsv) {
var h = hsv[0] / 60,
s = hsv[1] / 100,
v = hsv[2] / 100,
hi = Math.floor(h) % 6;
var f = h - Math.floor(h),
p = 255 * v * (1 - s),
q = 255 * v * (1 - (s * f)),
t = 255 * v * (1 - (s * (1 - f))),
v = 255 * v;
switch(hi) {
case 0:
return [v, t, p];
case 1:
return [q, v, p];
case 2:
return [p, v, t];
case 3:
return [p, q, v];
case 4:
return [t, p, v];
case 5:
return [v, p, q];
}
}
function hsv2hsl(hsv) {
var h = hsv[0],
s = hsv[1] / 100,
v = hsv[2] / 100,
sl, l;
l = (2 - s) * v;
sl = s * v;
sl /= (l <= 1) ? l : 2 - l;
sl = sl || 0;
l /= 2;
return [h, sl * 100, l * 100];
}
function hsv2hwb(args) {
return rgb2hwb(hsv2rgb(args))
}
function hsv2cmyk(args) {
return rgb2cmyk(hsv2rgb(args));
}
function hsv2keyword(args) {
return rgb2keyword(hsv2rgb(args));
}
// http://dev.w3.org/csswg/css-color/#hwb-to-rgb
function hwb2rgb(hwb) {
var h = hwb[0] / 360,
wh = hwb[1] / 100,
bl = hwb[2] / 100,
ratio = wh + bl,
i, v, f, n;
// wh + bl cant be > 1
if (ratio > 1) {
wh /= ratio;
bl /= ratio;
}
i = Math.floor(6 * h);
v = 1 - bl;
f = 6 * h - i;
if ((i & 0x01) != 0) {
f = 1 - f;
}
n = wh + f * (v - wh); // linear interpolation
switch (i) {
default:
case 6:
case 0: r = v; g = n; b = wh; break;
case 1: r = n; g = v; b = wh; break;
case 2: r = wh; g = v; b = n; break;
case 3: r = wh; g = n; b = v; break;
case 4: r = n; g = wh; b = v; break;
case 5: r = v; g = wh; b = n; break;
}
return [r * 255, g * 255, b * 255];
}
function hwb2hsl(args) {
return rgb2hsl(hwb2rgb(args));
}
function hwb2hsv(args) {
return rgb2hsv(hwb2rgb(args));
}
function hwb2cmyk(args) {
return rgb2cmyk(hwb2rgb(args));
}
function hwb2keyword(args) {
return rgb2keyword(hwb2rgb(args));
}
function cmyk2rgb(cmyk) {
var c = cmyk[0] / 100,
m = cmyk[1] / 100,
y = cmyk[2] / 100,
k = cmyk[3] / 100,
r, g, b;
r = 1 - Math.min(1, c * (1 - k) + k);
g = 1 - Math.min(1, m * (1 - k) + k);
b = 1 - Math.min(1, y * (1 - k) + k);
return [r * 255, g * 255, b * 255];
}
function cmyk2hsl(args) {
return rgb2hsl(cmyk2rgb(args));
}
function cmyk2hsv(args) {
return rgb2hsv(cmyk2rgb(args));
}
function cmyk2hwb(args) {
return rgb2hwb(cmyk2rgb(args));
}
function cmyk2keyword(args) {
return rgb2keyword(cmyk2rgb(args));
}
function xyz2rgb(xyz) {
var x = xyz[0] / 100,
y = xyz[1] / 100,
z = xyz[2] / 100,
r, g, b;
r = (x * 3.2406) + (y * -1.5372) + (z * -0.4986);
g = (x * -0.9689) + (y * 1.8758) + (z * 0.0415);
b = (x * 0.0557) + (y * -0.2040) + (z * 1.0570);
// assume sRGB
r = r > 0.0031308 ? ((1.055 * Math.pow(r, 1.0 / 2.4)) - 0.055)
: r = (r * 12.92);
g = g > 0.0031308 ? ((1.055 * Math.pow(g, 1.0 / 2.4)) - 0.055)
: g = (g * 12.92);
b = b > 0.0031308 ? ((1.055 * Math.pow(b, 1.0 / 2.4)) - 0.055)
: b = (b * 12.92);
r = Math.min(Math.max(0, r), 1);
g = Math.min(Math.max(0, g), 1);
b = Math.min(Math.max(0, b), 1);
return [r * 255, g * 255, b * 255];
}
function xyz2lab(xyz) {
var x = xyz[0],
y = xyz[1],
z = xyz[2],
l, a, b;
x /= 95.047;
y /= 100;
z /= 108.883;
x = x > 0.008856 ? Math.pow(x, 1/3) : (7.787 * x) + (16 / 116);
y = y > 0.008856 ? Math.pow(y, 1/3) : (7.787 * y) + (16 / 116);
z = z > 0.008856 ? Math.pow(z, 1/3) : (7.787 * z) + (16 / 116);
l = (116 * y) - 16;
a = 500 * (x - y);
b = 200 * (y - z);
return [l, a, b];
}
function xyz2lch(args) {
return lab2lch(xyz2lab(args));
}
function lab2xyz(lab) {
var l = lab[0],
a = lab[1],
b = lab[2],
x, y, z, y2;
if (l <= 8) {
y = (l * 100) / 903.3;
y2 = (7.787 * (y / 100)) + (16 / 116);
} else {
y = 100 * Math.pow((l + 16) / 116, 3);
y2 = Math.pow(y / 100, 1/3);
}
x = x / 95.047 <= 0.008856 ? x = (95.047 * ((a / 500) + y2 - (16 / 116))) / 7.787 : 95.047 * Math.pow((a / 500) + y2, 3);
z = z / 108.883 <= 0.008859 ? z = (108.883 * (y2 - (b / 200) - (16 / 116))) / 7.787 : 108.883 * Math.pow(y2 - (b / 200), 3);
return [x, y, z];
}
function lab2lch(lab) {
var l = lab[0],
a = lab[1],
b = lab[2],
hr, h, c;
hr = Math.atan2(b, a);
h = hr * 360 / 2 / Math.PI;
if (h < 0) {
h += 360;
}
c = Math.sqrt(a * a + b * b);
return [l, c, h];
}
function lab2rgb(args) {
return xyz2rgb(lab2xyz(args));
}
function lch2lab(lch) {
var l = lch[0],
c = lch[1],
h = lch[2],
a, b, hr;
hr = h / 360 * 2 * Math.PI;
a = c * Math.cos(hr);
b = c * Math.sin(hr);
return [l, a, b];
}
function lch2xyz(args) {
return lab2xyz(lch2lab(args));
}
function lch2rgb(args) {
return lab2rgb(lch2lab(args));
}
function keyword2rgb(keyword) {
return cssKeywords[keyword];
}
function keyword2hsl(args) {
return rgb2hsl(keyword2rgb(args));
}
function keyword2hsv(args) {
return rgb2hsv(keyword2rgb(args));
}
function keyword2hwb(args) {
return rgb2hwb(keyword2rgb(args));
}
function keyword2cmyk(args) {
return rgb2cmyk(keyword2rgb(args));
}
function keyword2lab(args) {
return rgb2lab(keyword2rgb(args));
}
function keyword2xyz(args) {
return rgb2xyz(keyword2rgb(args));
}
var cssKeywords = {
aliceblue: [240,248,255],
antiquewhite: [250,235,215],
aqua: [0,255,255],
aquamarine: [127,255,212],
azure: [240,255,255],
beige: [245,245,220],
bisque: [255,228,196],
black: [0,0,0],
blanchedalmond: [255,235,205],
blue: [0,0,255],
blueviolet: [138,43,226],
brown: [165,42,42],
burlywood: [222,184,135],
cadetblue: [95,158,160],
chartreuse: [127,255,0],
chocolate: [210,105,30],
coral: [255,127,80],
cornflowerblue: [100,149,237],
cornsilk: [255,248,220],
crimson: [220,20,60],
cyan: [0,255,255],
darkblue: [0,0,139],
darkcyan: [0,139,139],
darkgoldenrod: [184,134,11],
darkgray: [169,169,169],
darkgreen: [0,100,0],
darkgrey: [169,169,169],
darkkhaki: [189,183,107],
darkmagenta: [139,0,139],
darkolivegreen: [85,107,47],
darkorange: [255,140,0],
darkorchid: [153,50,204],
darkred: [139,0,0],
darksalmon: [233,150,122],
darkseagreen: [143,188,143],
darkslateblue: [72,61,139],
darkslategray: [47,79,79],
darkslategrey: [47,79,79],
darkturquoise: [0,206,209],
darkviolet: [148,0,211],
deeppink: [255,20,147],
deepskyblue: [0,191,255],
dimgray: [105,105,105],
dimgrey: [105,105,105],
dodgerblue: [30,144,255],
firebrick: [178,34,34],
floralwhite: [255,250,240],
forestgreen: [34,139,34],
fuchsia: [255,0,255],
gainsboro: [220,220,220],
ghostwhite: [248,248,255],
gold: [255,215,0],
goldenrod: [218,165,32],
gray: [128,128,128],
green: [0,128,0],
greenyellow: [173,255,47],
grey: [128,128,128],
honeydew: [240,255,240],
hotpink: [255,105,180],
indianred: [205,92,92],
indigo: [75,0,130],
ivory: [255,255,240],
khaki: [240,230,140],
lavender: [230,230,250],
lavenderblush: [255,240,245],
lawngreen: [124,252,0],
lemonchiffon: [255,250,205],
lightblue: [173,216,230],
lightcoral: [240,128,128],
lightcyan: [224,255,255],
lightgoldenrodyellow: [250,250,210],
lightgray: [211,211,211],
lightgreen: [144,238,144],
lightgrey: [211,211,211],
lightpink: [255,182,193],
lightsalmon: [255,160,122],
lightseagreen: [32,178,170],
lightskyblue: [135,206,250],
lightslategray: [119,136,153],
lightslategrey: [119,136,153],
lightsteelblue: [176,196,222],
lightyellow: [255,255,224],
lime: [0,255,0],
limegreen: [50,205,50],
linen: [250,240,230],
magenta: [255,0,255],
maroon: [128,0,0],
mediumaquamarine: [102,205,170],
mediumblue: [0,0,205],
mediumorchid: [186,85,211],
mediumpurple: [147,112,219],
mediumseagreen: [60,179,113],
mediumslateblue: [123,104,238],
mediumspringgreen: [0,250,154],
mediumturquoise: [72,209,204],
mediumvioletred: [199,21,133],
midnightblue: [25,25,112],
mintcream: [245,255,250],
mistyrose: [255,228,225],
moccasin: [255,228,181],
navajowhite: [255,222,173],
navy: [0,0,128],
oldlace: [253,245,230],
olive: [128,128,0],
olivedrab: [107,142,35],
orange: [255,165,0],
orangered: [255,69,0],
orchid: [218,112,214],
palegoldenrod: [238,232,170],
palegreen: [152,251,152],
paleturquoise: [175,238,238],
palevioletred: [219,112,147],
papayawhip: [255,239,213],
peachpuff: [255,218,185],
peru: [205,133,63],
pink: [255,192,203],
plum: [221,160,221],
powderblue: [176,224,230],
purple: [128,0,128],
rebeccapurple: [102, 51, 153],
red: [255,0,0],
rosybrown: [188,143,143],
royalblue: [65,105,225],
saddlebrown: [139,69,19],
salmon: [250,128,114],
sandybrown: [244,164,96],
seagreen: [46,139,87],
seashell: [255,245,238],
sienna: [160,82,45],
silver: [192,192,192],
skyblue: [135,206,235],
slateblue: [106,90,205],
slategray: [112,128,144],
slategrey: [112,128,144],
snow: [255,250,250],
springgreen: [0,255,127],
steelblue: [70,130,180],
tan: [210,180,140],
teal: [0,128,128],
thistle: [216,191,216],
tomato: [255,99,71],
turquoise: [64,224,208],
violet: [238,130,238],
wheat: [245,222,179],
white: [255,255,255],
whitesmoke: [245,245,245],
yellow: [255,255,0],
yellowgreen: [154,205,50]
};
var reverseKeywords = {};
for (var key in cssKeywords) {
reverseKeywords[JSON.stringify(cssKeywords[key])] = key;
}
},{}],3:[function(require,module,exports){
var conversions = require("./conversions");
var convert = function() {
return new Converter();
}
for (var func in conversions) {
// export Raw versions
convert[func + "Raw"] = (function(func) {
// accept array or plain args
return function(arg) {
if (typeof arg == "number")
arg = Array.prototype.slice.call(arguments);
return conversions[func](arg);
}
})(func);
var pair = /(\w+)2(\w+)/.exec(func),
from = pair[1],
to = pair[2];
// export rgb2hsl and ["rgb"]["hsl"]
convert[from] = convert[from] || {};
convert[from][to] = convert[func] = (function(func) {
return function(arg) {
if (typeof arg == "number")
arg = Array.prototype.slice.call(arguments);
var val = conversions[func](arg);
if (typeof val == "string" || val === undefined)
return val; // keyword
for (var i = 0; i < val.length; i++)
val[i] = Math.round(val[i]);
return val;
}
})(func);
}
/* Converter does lazy conversion and caching */
var Converter = function() {
this.convs = {};
};
/* Either get the values for a space or
set the values for a space, depending on args */
Converter.prototype.routeSpace = function(space, args) {
var values = args[0];
if (values === undefined) {
// color.rgb()
return this.getValues(space);
}
// color.rgb(10, 10, 10)
if (typeof values == "number") {
values = Array.prototype.slice.call(args);
}
return this.setValues(space, values);
};
/* Set the values for a space, invalidating cache */
Converter.prototype.setValues = function(space, values) {
this.space = space;
this.convs = {};
this.convs[space] = values;
return this;
};
/* Get the values for a space. If there's already
a conversion for the space, fetch it, otherwise
compute it */
Converter.prototype.getValues = function(space) {
var vals = this.convs[space];
if (!vals) {
var fspace = this.space,
from = this.convs[fspace];
vals = convert[fspace][space](from);
this.convs[space] = vals;
}
return vals;
};
["rgb", "hsl", "hsv", "cmyk", "keyword"].forEach(function(space) {
Converter.prototype[space] = function(vals) {
return this.routeSpace(space, arguments);
}
});
module.exports = convert;
},{"./conversions":2}],4:[function(require,module,exports){
/* MIT license */
var colorNames = require('color-name');
module.exports = {
getRgba: getRgba,
getHsla: getHsla,
getRgb: getRgb,
getHsl: getHsl,
getHwb: getHwb,
getAlpha: getAlpha,
hexString: hexString,
rgbString: rgbString,
rgbaString: rgbaString,
percentString: percentString,
percentaString: percentaString,
hslString: hslString,
hslaString: hslaString,
hwbString: hwbString,
keyword: keyword
}
function getRgba(string) {
if (!string) {
return;
}
var abbr = /^#([a-fA-F0-9]{3})$/,
hex = /^#([a-fA-F0-9]{6})$/,
rgba = /^rgba?\(\s*([+-]?\d+)\s*,\s*([+-]?\d+)\s*,\s*([+-]?\d+)\s*(?:,\s*([+-]?[\d\.]+)\s*)?\)$/,
per = /^rgba?\(\s*([+-]?[\d\.]+)\%\s*,\s*([+-]?[\d\.]+)\%\s*,\s*([+-]?[\d\.]+)\%\s*(?:,\s*([+-]?[\d\.]+)\s*)?\)$/,
keyword = /(\D+)/;
var rgb = [0, 0, 0],
a = 1,
match = string.match(abbr);
if (match) {
match = match[1];
for (var i = 0; i < rgb.length; i++) {
rgb[i] = parseInt(match[i] + match[i], 16);
}
}
else if (match = string.match(hex)) {
match = match[1];
for (var i = 0; i < rgb.length; i++) {
rgb[i] = parseInt(match.slice(i * 2, i * 2 + 2), 16);
}
}
else if (match = string.match(rgba)) {
for (var i = 0; i < rgb.length; i++) {
rgb[i] = parseInt(match[i + 1]);
}
a = parseFloat(match[4]);
}
else if (match = string.match(per)) {
for (var i = 0; i < rgb.length; i++) {
rgb[i] = Math.round(parseFloat(match[i + 1]) * 2.55);
}
a = parseFloat(match[4]);
}
else if (match = string.match(keyword)) {
if (match[1] == "transparent") {
return [0, 0, 0, 0];
}
rgb = colorNames[match[1]];
if (!rgb) {
return;
}
}
for (var i = 0; i < rgb.length; i++) {
rgb[i] = scale(rgb[i], 0, 255);
}
if (!a && a != 0) {
a = 1;
}
else {
a = scale(a, 0, 1);
}
rgb[3] = a;
return rgb;
}
function getHsla(string) {
if (!string) {
return;
}
var hsl = /^hsla?\(\s*([+-]?\d+)(?:deg)?\s*,\s*([+-]?[\d\.]+)%\s*,\s*([+-]?[\d\.]+)%\s*(?:,\s*([+-]?[\d\.]+)\s*)?\)/;
var match = string.match(hsl);
if (match) {
var alpha = parseFloat(match[4]);
var h = scale(parseInt(match[1]), 0, 360),
s = scale(parseFloat(match[2]), 0, 100),
l = scale(parseFloat(match[3]), 0, 100),
a = scale(isNaN(alpha) ? 1 : alpha, 0, 1);
return [h, s, l, a];
}
}
function getHwb(string) {
if (!string) {
return;
}
var hwb = /^hwb\(\s*([+-]?\d+)(?:deg)?\s*,\s*([+-]?[\d\.]+)%\s*,\s*([+-]?[\d\.]+)%\s*(?:,\s*([+-]?[\d\.]+)\s*)?\)/;
var match = string.match(hwb);
if (match) {
var alpha = parseFloat(match[4]);
var h = scale(parseInt(match[1]), 0, 360),
w = scale(parseFloat(match[2]), 0, 100),
b = scale(parseFloat(match[3]), 0, 100),
a = scale(isNaN(alpha) ? 1 : alpha, 0, 1);
return [h, w, b, a];
}
}
function getRgb(string) {
var rgba = getRgba(string);
return rgba && rgba.slice(0, 3);
}
function getHsl(string) {
var hsla = getHsla(string);
return hsla && hsla.slice(0, 3);
}
function getAlpha(string) {
var vals = getRgba(string);
if (vals) {
return vals[3];
}
else if (vals = getHsla(string)) {
return vals[3];
}
else if (vals = getHwb(string)) {
return vals[3];
}
}
// generators
function hexString(rgb) {
return "#" + hexDouble(rgb[0]) + hexDouble(rgb[1])
+ hexDouble(rgb[2]);
}
function rgbString(rgba, alpha) {
if (alpha < 1 || (rgba[3] && rgba[3] < 1)) {
return rgbaString(rgba, alpha);
}
return "rgb(" + rgba[0] + ", " + rgba[1] + ", " + rgba[2] + ")";
}
function rgbaString(rgba, alpha) {
if (alpha === undefined) {
alpha = (rgba[3] !== undefined ? rgba[3] : 1);
}
return "rgba(" + rgba[0] + ", " + rgba[1] + ", " + rgba[2]
+ ", " + alpha + ")";
}
function percentString(rgba, alpha) {
if (alpha < 1 || (rgba[3] && rgba[3] < 1)) {
return percentaString(rgba, alpha);
}
var r = Math.round(rgba[0]/255 * 100),
g = Math.round(rgba[1]/255 * 100),
b = Math.round(rgba[2]/255 * 100);
return "rgb(" + r + "%, " + g + "%, " + b + "%)";
}
function percentaString(rgba, alpha) {
var r = Math.round(rgba[0]/255 * 100),
g = Math.round(rgba[1]/255 * 100),
b = Math.round(rgba[2]/255 * 100);
return "rgba(" + r + "%, " + g + "%, " + b + "%, " + (alpha || rgba[3] || 1) + ")";
}
function hslString(hsla, alpha) {
if (alpha < 1 || (hsla[3] && hsla[3] < 1)) {
return hslaString(hsla, alpha);
}
return "hsl(" + hsla[0] + ", " + hsla[1] + "%, " + hsla[2] + "%)";
}
function hslaString(hsla, alpha) {
if (alpha === undefined) {
alpha = (hsla[3] !== undefined ? hsla[3] : 1);
}
return "hsla(" + hsla[0] + ", " + hsla[1] + "%, " + hsla[2] + "%, "
+ alpha + ")";
}
// hwb is a bit different than rgb(a) & hsl(a) since there is no alpha specific syntax
// (hwb have alpha optional & 1 is default value)
function hwbString(hwb, alpha) {
if (alpha === undefined) {
alpha = (hwb[3] !== undefined ? hwb[3] : 1);
}
return "hwb(" + hwb[0] + ", " + hwb[1] + "%, " + hwb[2] + "%"
+ (alpha !== undefined && alpha !== 1 ? ", " + alpha : "") + ")";
}
function keyword(rgb) {
return reverseNames[rgb.slice(0, 3)];
}
// helpers
function scale(num, min, max) {
return Math.min(Math.max(min, num), max);
}
function hexDouble(num) {
var str = num.toString(16).toUpperCase();
return (str.length < 2) ? "0" + str : str;
}
//create a list of reverse color names
var reverseNames = {};
for (var name in colorNames) {
reverseNames[colorNames[name]] = name;
}
},{"color-name":5}],5:[function(require,module,exports){
module.exports={
"aliceblue": [240, 248, 255],
"antiquewhite": [250, 235, 215],
"aqua": [0, 255, 255],
"aquamarine": [127, 255, 212],
"azure": [240, 255, 255],
"beige": [245, 245, 220],
"bisque": [255, 228, 196],
"black": [0, 0, 0],
"blanchedalmond": [255, 235, 205],
"blue": [0, 0, 255],
"blueviolet": [138, 43, 226],
"brown": [165, 42, 42],
"burlywood": [222, 184, 135],
"cadetblue": [95, 158, 160],
"chartreuse": [127, 255, 0],
"chocolate": [210, 105, 30],
"coral": [255, 127, 80],
"cornflowerblue": [100, 149, 237],
"cornsilk": [255, 248, 220],
"crimson": [220, 20, 60],
"cyan": [0, 255, 255],
"darkblue": [0, 0, 139],
"darkcyan": [0, 139, 139],
"darkgoldenrod": [184, 134, 11],
"darkgray": [169, 169, 169],
"darkgreen": [0, 100, 0],
"darkgrey": [169, 169, 169],
"darkkhaki": [189, 183, 107],
"darkmagenta": [139, 0, 139],
"darkolivegreen": [85, 107, 47],
"darkorange": [255, 140, 0],
"darkorchid": [153, 50, 204],
"darkred": [139, 0, 0],
"darksalmon": [233, 150, 122],
"darkseagreen": [143, 188, 143],
"darkslateblue": [72, 61, 139],
"darkslategray": [47, 79, 79],
"darkslategrey": [47, 79, 79],
"darkturquoise": [0, 206, 209],
"darkviolet": [148, 0, 211],
"deeppink": [255, 20, 147],
"deepskyblue": [0, 191, 255],
"dimgray": [105, 105, 105],
"dimgrey": [105, 105, 105],
"dodgerblue": [30, 144, 255],
"firebrick": [178, 34, 34],
"floralwhite": [255, 250, 240],
"forestgreen": [34, 139, 34],
"fuchsia": [255, 0, 255],
"gainsboro": [220, 220, 220],
"ghostwhite": [248, 248, 255],
"gold": [255, 215, 0],
"goldenrod": [218, 165, 32],
"gray": [128, 128, 128],
"green": [0, 128, 0],
"greenyellow": [173, 255, 47],
"grey": [128, 128, 128],
"honeydew": [240, 255, 240],
"hotpink": [255, 105, 180],
"indianred": [205, 92, 92],
"indigo": [75, 0, 130],
"ivory": [255, 255, 240],
"khaki": [240, 230, 140],
"lavender": [230, 230, 250],
"lavenderblush": [255, 240, 245],
"lawngreen": [124, 252, 0],
"lemonchiffon": [255, 250, 205],
"lightblue": [173, 216, 230],
"lightcoral": [240, 128, 128],
"lightcyan": [224, 255, 255],
"lightgoldenrodyellow": [250, 250, 210],
"lightgray": [211, 211, 211],
"lightgreen": [144, 238, 144],
"lightgrey": [211, 211, 211],
"lightpink": [255, 182, 193],
"lightsalmon": [255, 160, 122],
"lightseagreen": [32, 178, 170],
"lightskyblue": [135, 206, 250],
"lightslategray": [119, 136, 153],
"lightslategrey": [119, 136, 153],
"lightsteelblue": [176, 196, 222],
"lightyellow": [255, 255, 224],
"lime": [0, 255, 0],
"limegreen": [50, 205, 50],
"linen": [250, 240, 230],
"magenta": [255, 0, 255],
"maroon": [128, 0, 0],
"mediumaquamarine": [102, 205, 170],
"mediumblue": [0, 0, 205],
"mediumorchid": [186, 85, 211],
"mediumpurple": [147, 112, 219],
"mediumseagreen": [60, 179, 113],
"mediumslateblue": [123, 104, 238],
"mediumspringgreen": [0, 250, 154],
"mediumturquoise": [72, 209, 204],
"mediumvioletred": [199, 21, 133],
"midnightblue": [25, 25, 112],
"mintcream": [245, 255, 250],
"mistyrose": [255, 228, 225],
"moccasin": [255, 228, 181],
"navajowhite": [255, 222, 173],
"navy": [0, 0, 128],
"oldlace": [253, 245, 230],
"olive": [128, 128, 0],
"olivedrab": [107, 142, 35],
"orange": [255, 165, 0],
"orangered": [255, 69, 0],
"orchid": [218, 112, 214],
"palegoldenrod": [238, 232, 170],
"palegreen": [152, 251, 152],
"paleturquoise": [175, 238, 238],
"palevioletred": [219, 112, 147],
"papayawhip": [255, 239, 213],
"peachpuff": [255, 218, 185],
"peru": [205, 133, 63],
"pink": [255, 192, 203],
"plum": [221, 160, 221],
"powderblue": [176, 224, 230],
"purple": [128, 0, 128],
"rebeccapurple": [102, 51, 153],
"red": [255, 0, 0],
"rosybrown": [188, 143, 143],
"royalblue": [65, 105, 225],
"saddlebrown": [139, 69, 19],
"salmon": [250, 128, 114],
"sandybrown": [244, 164, 96],
"seagreen": [46, 139, 87],
"seashell": [255, 245, 238],
"sienna": [160, 82, 45],
"silver": [192, 192, 192],
"skyblue": [135, 206, 235],
"slateblue": [106, 90, 205],
"slategray": [112, 128, 144],
"slategrey": [112, 128, 144],
"snow": [255, 250, 250],
"springgreen": [0, 255, 127],
"steelblue": [70, 130, 180],
"tan": [210, 180, 140],
"teal": [0, 128, 128],
"thistle": [216, 191, 216],
"tomato": [255, 99, 71],
"turquoise": [64, 224, 208],
"violet": [238, 130, 238],
"wheat": [245, 222, 179],
"white": [255, 255, 255],
"whitesmoke": [245, 245, 245],
"yellow": [255, 255, 0],
"yellowgreen": [154, 205, 50]
}
},{}],6:[function(require,module,exports){
module.exports = require('./lib/geocrunch');
},{"./lib/geocrunch":11}],7:[function(require,module,exports){
// distance.js - Distance mixins for Paths
var _ = require('underscore');
var R = require('./constants').EARTHRADIUS;
var units = require('./units');
var flipCoords = require('./flipcoords');
// Area conversions (from sqmeters)
var convertFuncs = {
sqmeters: function (a) {
return a;
},
sqmiles: function (a) {
return units.sqMeters.toSqMiles(a);
},
acres: function (a) {
return units.sqMeters.toAcres(a);
}
};
// Calculates area in square meters
// Method taken from OpenLayers API, https://github.com/openlayers/openlayers/blob/master/lib/OpenLayers/Geometry/LinearRing.js#L270
var calcArea = function (coordArray) {
var area = 0, i, l, c1, c2;
for (i = 0, l = coordArray.length; i < l; i += 1) {
c1 = coordArray[i];
c2 = coordArray[(i + 1) % coordArray.length]; // Access next item in array until last item is i, then accesses first (0)
area = area + units.degrees.toRadians(c2[0] - c1[0]) * (2 + Math.sin(units.degrees.toRadians(c1[1])) + Math.sin(units.degrees.toRadians(c2[1])));
}
return Math.abs(area * R * R / 2);
};
var calcCenter = function (coordArray) {
var offset = coordArray[0], twiceArea = 0, x = 0, y = 0, i, l, c1, c2, f;
if (coordArray.length === 1) {
return coordArray[0];
}
for (i = 0, l = coordArray.length; i < l; i += 1) {
c1 = coordArray[i];
c2 = coordArray[(i + 1) % coordArray.length]; // Access next item in array until last item is i, then accesses first (0)
f = (c1[1] - offset[1]) * (c2[0] - offset[0]) - (c2[1] - offset[1]) * (c1[0] - offset[0]);
twiceArea = twiceArea + f;
x = x + ((c1[0] + c2[0] - 2 * offset[0]) * f);
y = y + ((c1[1] + c2[1] - 2 * offset[1]) * f);
}
f = twiceArea * 3;
return [x / f + offset[0], y / f + offset[1]];
};
module.exports = {
_internalAreaCalc: function () {
// If not set, set this._calcedArea to total area in UNITS
// Checks for cache to prevent additional unnecessary calcs
if (!this._calcedArea) {
if (this._coords.length < 3) {
this._calcedArea = 0;
} else {
this._calcedArea = calcArea(this._coords);
}
}
},
_internalCenterCalc: function () {
if (!this._calcedCenter && this._coords.length) {
this._calcedCenter = calcCenter(this._coords);
}
},
area: function (options) {
var opts = _.extend({
units: 'sqmeters'
}, options);
this._internalAreaCalc();
if (_.isFunction(convertFuncs[opts.units])) {
return convertFuncs[opts.units](this._calcedArea);
}
// TODO. Handle non-matching units
},
center: function () {
this._internalCenterCalc();
return this._options.imBackwards === true ? flipCoords(this._calcedCenter) : this._calcedCenter;
}
};
},{"./constants":8,"./flipcoords":10,"./units":13,"underscore":14}],8:[function(require,module,exports){
// utils/constants.js
module.exports = {
EARTHRADIUS: 6371000 // R in meters
};
},{}],9:[function(require,module,exports){
// distance.js - Distance mixins for Paths
var _ = require('underscore');
var R = require('./constants').EARTHRADIUS;
var units = require('./units');
// Distance conversions (from meters)
var convertFuncs = {
meters: function (d) {
return d;
},
kilometers: function (d) {
return units.meters.toKilometers(d);
},
feet: function (d) {
return units.meters.toFeet(d);
},
miles: function (d) {
return units.meters.toMiles(d);
}
};
// Distance in meters
// Always positive regardless of direction
// Calculation based on Haversine Formula http://en.wikipedia.org/wiki/Haversine_formula
// Another method is @ http://www.movable-type.co.uk/scripts/latlong-vincenty.html but seems way overcomplicated
var calcDistance = function (coord1, coord2) {
var deltaLng = units.degrees.toRadians(coord1[0] - coord2[0]),
deltaLat = units.degrees.toRadians(coord1[1] - coord2[1]),
lat1 = units.degrees.toRadians(coord1[1]),
lat2 = units.degrees.toRadians(coord2[1]),
hvsLng = Math.sin(deltaLng / 2),
hvsLat = Math.sin(deltaLat / 2);
var a = hvsLat * hvsLat + hvsLng * hvsLng * Math.cos(lat1) * Math.cos(lat2);
return R * 2 * Math.atan2(Math.sqrt(a), Math.sqrt(1 - a));
};
module.exports = {
_internalDistanceCalc: function () {
// If not set, set this._calcedDistance to total distance in meters
// Checks for cache to prevent additional unnecessary calcs
var distance = 0, i, l;
if (!this._calcedDistance) {
for (i = 0, l = this._coords.length; i < l; i += 1) {
if (i > 0) {
distance = distance + calcDistance(this._coords[i - 1], this._coords[i]);
}
}
this._calcedDistance = distance;
}
},
distance: function (options) {
var opts = _.extend({
units: 'meters'
}, options);
this._internalDistanceCalc();
if (_.isFunction(convertFuncs[opts.units])) {
return convertFuncs[opts.units](this._calcedDistance);
}
// TODO. Handle non-matching units
}
};
},{"./constants":8,"./units":13,"underscore":14}],10:[function(require,module,exports){
// utils/flipcoords.js - Util functions for working with backwards coordinates [lat, lng]
var _ = require('underscore');
module.exports = function (backwardsCoordArray) {
return _.map(backwardsCoordArray, function (backwardsCoord) {
return [backwardsCoord[1], backwardsCoord[0]];
});
};
},{"underscore":14}],11:[function(require,module,exports){
// geocrunch.js
var _ = require('underscore');
var Path = require('./path');
var distanceMixins = require('./distance'),
areaMixins = require('./area');
_.extend(Path.prototype, distanceMixins, areaMixins);
exports.path = function (coords, options) {
return new Path(coords, options);
};
},{"./area":7,"./distance":9,"./path":12,"underscore":14}],12:[function(require,module,exports){
// path.js - Object for working with a linear path of coordinates
var flipCoords = require('./flipcoords');
var Path = function (coords, options) {
this._options = options || {};
// Set this._coords... Think about flipping at time of calcs for less iterations/better perf. May risk code clarity and mixin ease.
coords = coords || [];
this._coords = this._options.imBackwards === true ? flipCoords(coords) : coords;
};
module.exports = Path;
},{"./flipcoords":10}],13:[function(require,module,exports){
// units.js - Standard unit conversions
exports.meters = {
toFeet: function (m) {
return m * 3.28084;
},
toKilometers: function (m) {
return m * 0.001;
},
toMiles: function (m) {
return m * 0.000621371;
}
};
exports.sqMeters = {
toSqMiles: function (m) {
return m * 0.000000386102;
},
toAcres: function (m) {
return m * 0.000247105;
}
};
exports.degrees = {
toRadians: function (d) {
return d * Math.PI / 180;
}
};
},{}],14:[function(require,module,exports){
// Underscore.js 1.5.2
// http://underscorejs.org
// (c) 2009-2013 Jeremy Ashkenas, DocumentCloud and Investigative Reporters & Editors
// Underscore may be freely distributed under the MIT license.
(function() {
// Baseline setup
// --------------
// Establish the root object, `window` in the browser, or `exports` on the server.
var root = this;
// Save the previous value of the `_` variable.
var previousUnderscore = root._;
// Establish the object that gets returned to break out of a loop iteration.
var breaker = {};
// Save bytes in the minified (but not gzipped) version:
var ArrayProto = Array.prototype, ObjProto = Object.prototype, FuncProto = Function.prototype;
// Create quick reference variables for speed access to core prototypes.
var
push = ArrayProto.push,
slice = ArrayProto.slice,
concat = ArrayProto.concat,
toString = ObjProto.toString,
hasOwnProperty = ObjProto.hasOwnProperty;
// All **ECMAScript 5** native function implementations that we hope to use
// are declared here.
var
nativeForEach = ArrayProto.forEach,
nativeMap = ArrayProto.map,
nativeReduce = ArrayProto.reduce,
nativeReduceRight = ArrayProto.reduceRight,
nativeFilter = ArrayProto.filter,
nativeEvery = ArrayProto.every,
nativeSome = ArrayProto.some,
nativeIndexOf = ArrayProto.indexOf,
nativeLastIndexOf = ArrayProto.lastIndexOf,
nativeIsArray = Array.isArray,
nativeKeys = Object.keys,
nativeBind = FuncProto.bind;
// Create a safe reference to the Underscore object for use below.
var _ = function(obj) {
if (obj instanceof _) return obj;
if (!(this instanceof _)) return new _(obj);
this._wrapped = obj;
};
// Export the Underscore object for **Node.js**, with
// backwards-compatibility for the old `require()` API. If we're in
// the browser, add `_` as a global object via a string identifier,
// for Closure Compiler "advanced" mode.
if (typeof exports !== 'undefined') {
if (typeof module !== 'undefined' && module.exports) {
exports = module.exports = _;
}
exports._ = _;
} else {
root._ = _;
}
// Current version.
_.VERSION = '1.5.2';
// Collection Functions
// --------------------
// The cornerstone, an `each` implementation, aka `forEach`.
// Handles objects with the built-in `forEach`, arrays, and raw objects.
// Delegates to **ECMAScript 5**'s native `forEach` if available.
var each = _.each = _.forEach = function(obj, iterator, context) {
if (obj == null) return;
if (nativeForEach && obj.forEach === nativeForEach) {
obj.forEach(iterator, context);
} else if (obj.length === +obj.length) {
for (var i = 0, length = obj.length; i < length; i++) {
if (iterator.call(context, obj[i], i, obj) === breaker) return;
}
} else {
var keys = _.keys(obj);
for (var i = 0, length = keys.length; i < length; i++) {
if (iterator.call(context, obj[keys[i]], keys[i], obj) === breaker) return;
}
}
};
// Return the results of applying the iterator to each element.
// Delegates to **ECMAScript 5**'s native `map` if available.
_.map = _.collect