geojson-random - npm Package Compare versions

Comparing version 0.3.0 to 0.4.0

CHANGELOG.md

@@ -0,1 +1,15 @@
+# Change Log
+
+All notable changes to this project will be documented in this file. See [standard-version](https://github.com/conventional-changelog/standard-version) for commit guidelines.
+
+<a name="0.4.0"></a>
+# [0.4.0](https://github.com/tmcw/geojson-random/compare/v0.3.0...v0.4.0) (2017-04-25)
+
+
+### Features
+
+* lineString, generates linestrings ([cc7f1e7](https://github.com/tmcw/geojson-random/commit/cc7f1e7)), closes [#13](https://github.com/tmcw/geojson-random/issues/13)
+
+
+
 # 0.3.0
@@ -2,0 +16,0 @@

index.js

 var from = require('from2');
 
 module.exports = function() {
-    throw new Error('call .point() or .polygon() instead');
+    throw new Error('call .point(), .lineString(), or .polygon() instead');
 };
@@ -66,3 +66,32 @@
 
+module.exports.lineString = function(count, num_vertices, max_length, max_rotation, bbox) {
+    if (typeof num_vertices !== 'number' || num_vertices < 2) num_vertices = 10;
+    if (typeof max_length !== 'number') max_length = 0.0001;
+    if (typeof max_rotation !== 'number') max_rotation = Math.PI / 8;
 
+    var features = [];
+    for (i = 0; i < count; i++) {
+        var startingPoint = position(bbox);
+        var vertices = [startingPoint];
+        for (var j = 0; j < num_vertices - 1; j++) {
+            var priorAngle = (j === 0)
+            ? Math.random() * 2 * Math.PI
+            : Math.tan(
+              (vertices[j][1] - vertices[j - 1][1]) /
+              (vertices[j][0] - vertices[j - 1][0])
+            )
+            var angle = priorAngle + (Math.random() - 0.5) * max_rotation * 2;
+            var distance = Math.random() * max_length;
+            vertices.push([
+                vertices[j][0] + distance * Math.cos(angle),
+                vertices[j][1] + distance * Math.sin(angle)
+            ]);
+        }
+        features.push(feature(lineString(vertices)));
+    }
+
+    return collection(features);
+};
+
+
 function vertexToCoordinate(hub) {
@@ -117,1 +146,8 @@ return function(cur, index) { return [cur[0] + hub[0], cur[1] + hub[1]]; };
 }
+
+function lineString(coordinates) {
+    return {
+      type: 'LineString',
+      coordinates: coordinates
+    };
+}

package.json

 {
   "name": "geojson-random",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "generate random geojson features",
@@ -10,3 +10,4 @@ "main": "index.js",
   "scripts": {
-    "test": "tape test.js"
+    "test": "tap test.js",
+    "release": "standard-version"
   },
@@ -28,8 +29,15 @@ "repository": {
   "devDependencies": {
-    "tape": "~2.13.4"
+    "cz-conventional-changelog": "^2.0.0",
+    "standard-version": "^4.0.0",
+    "tap": "^10.3.2"
   },
   "dependencies": {
     "from2": "^2.1.0",
-    "geojson-stream": "0.0.0"
+    "geojson-stream": "0.0.1"
+  },
+  "config": {
+    "commitizen": {
+      "path": "./node_modules/cz-conventional-changelog"
+    }
   }
 }

README.md

 # geojson-random
 
-[![build status](https://secure.travis-ci.org/mapbox/geojson-random.png)](http://travis-ci.org/mapbox/geojson-random)
+[![build status](https://secure.travis-ci.org/tmcw/geojson-random.svg)](http://travis-ci.org/tmcw/geojson-random)
+[![Greenkeeper badge](https://badges.greenkeeper.io/tmcw/geojson-random.svg)](https://greenkeeper.io/)
 
@@ -48,1 +49,16 @@ Generate random [GeoJSON](http://geojson.org/) features.
 * `bbox` (Optional) Bounding box in [minX, minY, maxX, maxY] order.
+
+### `random.lineString(count, num_vertices, max_length, max_rotation, bbox)`
+
+Return `count` line strings wrapped in a FeatureCollection.
+
+* `num_vertices` is default `10` and is how many coordinates each LineString
+  will contain.
+* `max_length` is the maximum number of decimal degrees that a vertex can be
+  from its predecessor
+  Default is `0.0001`.
+* `max_rotation` is the maximum number of radians that a line segment can turn
+  from the previous segment.
+  Default is `Math.PI / 8`.
+* `bbox` (Optional) Bounding box in [minX, minY, maxX, maxY] order. This
+  parameter is only applied to the starting point of the line.

test.js

@@ -1,2 +0,2 @@
-var test = require('tape'),
+var test = require('tap').test,
     geojsonRandom = require('./');
@@ -3,0 +3,0 @@

No alert changes

Improved metrics

Total package byte prevSize

84340

increased by890.84%

Number of package files

10

increased by25%

Lines of code

181

increased by21.48%

Number of lines in readme file

64

increased by33.33%

Worsened metrics

Dev dependency count

3

increased by200%

Dependency changes

• + AddedJSONStream@1.3.5(transitive)

• + Addedgeojson-stream@0.0.1(transitive)

• + Addedjsonparse@1.3.1(transitive)

• - RemovedJSONStream@0.7.4(transitive)

• - Removedgeojson-stream@0.0.0(transitive)

• - Removedjsonparse@0.0.5(transitive)

• Updatedgeojson-stream@0.0.1