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pirxpilot · Feb 7, 2024 · e6ea3a7 · e6ea3a7
1 parent c7fab28
commit e6ea3a7
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Showing 3 changed files with 86 additions and 41 deletions.
diff --git a/benchmark/index.js b/benchmark/index.js
@@ -19,22 +19,22 @@ suite('vis-why', function () {
   // or switch to fixed number of iterations
   // set('iterations', 500);
 
-  before(function() {
+  before(function () {
     this.shortPolyline = require('../test/fixtures/short.json');
     this.longPolyline = require('../test/fixtures/long.json');
   });
 
-  bench('short', function() {
+  bench('short', function () {
     simplify(this.shortPolyline, 5);
   });
 
-  bench('long', function() {
+  bench('long', function () {
     simplify(this.longPolyline, 10);
   });
 
-  [1000, 5000, 10000, 30000].forEach(function(len) {
+  [1000, 5000, 10000, 30000].forEach(function (len) {
     var polyline = usa.slice(-len);
-    bench('huge ' + len, function() {
+    bench('huge ' + len, function () {
       simplify(polyline, len / 100);
     });
   });

diff --git a/index.js b/index.js
@@ -20,7 +20,8 @@ function calculate(poly, area) {
     ts = { heap: heap(areaCompare, true) },
     triangle,
     trianglePrev,
-    a = poly[0], b, c = poly[1],
+    a = poly[0],
+    b, c = poly[1],
     list = [];
 
   // calculate areas
@@ -62,7 +63,7 @@ function eliminate(ts, limit, area) {
     nextTriangle,
     counter = ts.heap.size() - limit;
 
-  while(counter-- > 0) {
+  while (counter-- > 0) {
     triangle = ts.heap.pop();
     prevTriangle = triangle.prev;
     nextTriangle = triangle.next;
@@ -91,7 +92,7 @@ function eliminate(ts, limit, area) {
 function collect(triangle) {
   var poly = [triangle.a];
 
-  while(true) {
+  while (true) {
     poly.push(triangle.b);
     if (!triangle.next) {
       break;

diff --git a/test/simplify.js b/test/simplify.js
@@ -1,22 +1,43 @@
 var { describe, it } = require('node:test');
 var simplify = require('..');
 
-describe('simplify', function() {
-  it('should not change short polylines', function() {
+describe('simplify', function () {
+  it('should not change short polylines', function () {
     simplify([]).should.have.length(0);
-    simplify([[0, 0], [1, 1]]).should.eql([[0, 0], [1, 1]]);
+    simplify([
+      [0, 0],
+      [1, 1]
+    ]).should.eql([
+      [0, 0],
+      [1, 1]
+    ]);
   });
 
-  it('should work with small limits', function() {
-    simplify([[0, 0], [1, 1.5], [2, 2]], 2).should.eql([[0, 0], [2, 2]]);
+  it('should work with small limits', function () {
+    simplify([
+      [0, 0],
+      [1, 1.5],
+      [2, 2]
+    ], 2).should.eql([
+      [0, 0],
+      [2, 2]
+    ]);
   });
 
-  it('should not change anything if limit is larger than poly length', function() {
-    simplify([[0, 0], [1, 1], [2, 2]], 4).should.eql([[0, 0], [1, 1], [2, 2]]);
+  it('should not change anything if limit is larger than poly length', function () {
+    simplify([
+      [0, 0],
+      [1, 1],
+      [2, 2]
+    ], 4).should.eql([
+      [0, 0],
+      [1, 1],
+      [2, 2]
+    ]);
   });
 
 
-  it('should simplify longer polylines', function() {
+  it('should simplify longer polylines', function () {
 
     var poly = [
       [0, 0],
@@ -31,12 +52,17 @@ describe('simplify', function() {
       [9, 9]
     ];
 
-    simplify(poly, 4).should.eql([[ 0, 0 ], [ 3, 3 ], [ 8, 5 ], [ 9, 9 ]]);
+    simplify(poly, 4).should.eql([
+      [0, 0],
+      [3, 3],
+      [8, 5],
+      [9, 9]
+    ]);
 
   });
 
 
-  it('should simplify longer polylines using custom properties', function() {
+  it('should simplify longer polylines using custom properties', function () {
 
     function area(a, b, c) {
       return Math.abs(
@@ -46,29 +72,29 @@ describe('simplify', function() {
     }
 
     var poly = [
-      {x: 0, y: 0, label: 'a'},
-      {x: 1, y: 0, label: 'b'},
-      {x: 1, y: 1, label: 'c'},
-      {x: 3, y: 1, label: 'd'},
-      {x: 3, y: 3, label: 'e'},
-      {x: 4, y: 4, label: 'f'},
-      {x: 5, y: 4, label: 'g'},
-      {x: 8, y: 5, label: 'h'},
-      {x: 8, y: 7, label: 'i'},
-      {x: 9, y: 9, label: 'j'}
+      { x: 0, y: 0, label: 'a' },
+      { x: 1, y: 0, label: 'b' },
+      { x: 1, y: 1, label: 'c' },
+      { x: 3, y: 1, label: 'd' },
+      { x: 3, y: 3, label: 'e' },
+      { x: 4, y: 4, label: 'f' },
+      { x: 5, y: 4, label: 'g' },
+      { x: 8, y: 5, label: 'h' },
+      { x: 8, y: 7, label: 'i' },
+      { x: 9, y: 9, label: 'j' }
     ];
 
     simplify(poly, 4, area).should.eql([
-      {x: 0, y: 0, label: 'a'},
-      {x: 3, y: 3, label: 'e'},
-      {x: 8, y: 5, label: 'h'},
-      {x: 9, y: 9, label: 'j'}
+      { x: 0, y: 0, label: 'a' },
+      { x: 3, y: 3, label: 'e' },
+      { x: 8, y: 5, label: 'h' },
+      { x: 9, y: 9, label: 'j' }
     ]);
 
   });
 
 
-  it('should keep the ends of the straight line', function() {
+  it('should keep the ends of the straight line', function () {
 
     var poly = [
       [-3, -3],
@@ -78,14 +104,20 @@ describe('simplify', function() {
       [5, 5]
     ];
 
-    simplify(poly, 2).should.eql([[ -3, -3 ], [ 5, 5 ]]);
-    simplify(poly, 3).should.eql([[ -3, -3 ], [ 5, 5 ]]);
+    simplify(poly, 2).should.eql([
+      [-3, -3],
+      [5, 5]
+    ]);
+    simplify(poly, 3).should.eql([
+      [-3, -3],
+      [5, 5]
+    ]);
   });
 
   it('should remove duplicate stops', function () {
     var poly = [
-      [-91.9655,  39.55001],
-      [-91.9655,  39.55001],
+      [-91.9655, 39.55001],
+      [-91.9655, 39.55001],
       [-91.96581, 39.55024],
       [-91.96596, 39.55041],
       [-91.96599, 39.55053],
@@ -97,7 +129,7 @@ describe('simplify', function() {
     ];
 
     simplify(poly, 9).should.eql([
-      [-91.9655,  39.55001],
+      [-91.9655, 39.55001],
       [-91.96581, 39.55024],
       [-91.96596, 39.55041],
       [-91.96599, 39.55053],
@@ -109,15 +141,27 @@ describe('simplify', function() {
   });
 
 
-  it('should simplify longer polyline', function() {
+  it('should simplify longer polyline', function () {
     var poly = require('./fixtures/long.json');
     var simplified = require('./fixtures/simplified-long.json');
 
     simplify(poly, 40).should.eql(simplified);
   });
 
   it('should keep the first point', function () {
-     var poly = [[0, 0], [1, 0], [2, 0], [3, 1], [4, 2], [4, 4]];
-     simplify(poly, 4).should.eql([[0, 0], [2, 0], [4, 2], [4, 4]]);
+    var poly = [
+      [0, 0],
+      [1, 0],
+      [2, 0],
+      [3, 1],
+      [4, 2],
+      [4, 4]
+    ];
+    simplify(poly, 4).should.eql([
+      [0, 0],
+      [2, 0],
+      [4, 2],
+      [4, 4]
+    ]);
   });
 });