From 19629cd4459f74eacfec54ee047cf693188d6bcd Mon Sep 17 00:00:00 2001
From: erelsgl <erelsgl@gmail.com>
Date: Tue, 11 Mar 2014 22:24:09 +0200
Subject: [PATCH 1/8] add Node.js examples

---
 examples/nodejs/README.md                     |  6 ++++
 .../nodejs/polygon-line-point-operations.js   | 28 +++++++++++++++++++
 examples/nodejs/polygon-operations.js         | 23 +++++++++++++++
 examples/nodejs/polygon-polygon-operations.js | 28 +++++++++++++++++++
 examples/nodejs/show.js                       |  9 ++++++
 5 files changed, 94 insertions(+)
 create mode 100644 examples/nodejs/README.md
 create mode 100644 examples/nodejs/polygon-line-point-operations.js
 create mode 100644 examples/nodejs/polygon-operations.js
 create mode 100644 examples/nodejs/polygon-polygon-operations.js
 create mode 100644 examples/nodejs/show.js

diff --git a/examples/nodejs/README.md b/examples/nodejs/README.md
new file mode 100644
index 000000000..8dd52e6df
--- /dev/null
+++ b/examples/nodejs/README.md
@@ -0,0 +1,6 @@
+Node.JS examples
+================
+
+To run the examples, you have to install jsts from npm:
+
+    npm install -g jsts
diff --git a/examples/nodejs/polygon-line-point-operations.js b/examples/nodejs/polygon-line-point-operations.js
new file mode 100644
index 000000000..565b2e6df
--- /dev/null
+++ b/examples/nodejs/polygon-line-point-operations.js
@@ -0,0 +1,28 @@
+/**
+ * Example of calculating intersection between a polygon and a line or a point.
+ */
+
+var jsts = require("jsts");
+var show = require("./show");  // just for showing the geometric objects during the example.
+
+var reader = new jsts.io.WKTReader();
+
+
+var polygon = reader.read('POLYGON((0 0, 0 10, 10 10, 10 0, 0 0))'); // the square between (0,0) and (10,10)
+var line1 = reader.read('LINESTRING(-10 8, 20 8)');
+var line2 = reader.read('LINESTRING(0 11, 11 11)');
+var point1 = reader.read("POINT(7 7)");
+var point2 = reader.read("POINT(11 11)");
+
+show("polygon",polygon);
+show("line1",line1);
+show("line2",line2);
+show("point1",point1);
+show("point2",point2);
+
+show("line1 ^ polygon", line1.intersection(polygon));
+show("polygon ^ line2", polygon.intersection(line2));
+
+show("point1 ^ polygon", point1.intersection(polygon));
+show("polygon ^ point2", polygon.intersection(point2));
+
diff --git a/examples/nodejs/polygon-operations.js b/examples/nodejs/polygon-operations.js
new file mode 100644
index 000000000..a94ea3900
--- /dev/null
+++ b/examples/nodejs/polygon-operations.js
@@ -0,0 +1,23 @@
+/**
+ * Example of constructing and translating polygons..
+ */
+
+var jsts = require("jsts");
+var factory = new jsts.geom.GeometryFactory();
+
+var show = require("./show");  // just for showing the geometric objects during the example.
+
+
+// some shorthands:
+
+function coord(x,y)  {  return new jsts.geom.Coordinate(x,y); }
+function coordlist(array) {  return new jsts.geom.CoordinateList(array); }
+
+var a = factory.createPolygon(coordlist([coord(0, 0), coord(0, 10), coord(10, 10), coord(10, 0), coord(0, 0)]));
+var b = factory.createPolygon(coordlist([coord(5, 5), coord(5, 20), coord(20, 20), coord(20, 5), coord(5, 5)]));
+show("a",a);
+show("b",b);
+
+console.log(a.intersects(b)? "a intersects b": "a does not intersect b");
+show("a ^ b",a.intersection(b)); // the square between (5,5) and (10,10)
+
diff --git a/examples/nodejs/polygon-polygon-operations.js b/examples/nodejs/polygon-polygon-operations.js
new file mode 100644
index 000000000..87f9b102c
--- /dev/null
+++ b/examples/nodejs/polygon-polygon-operations.js
@@ -0,0 +1,28 @@
+/**
+ * Example of calculating intersection and union between polygons.
+ */
+
+var jsts = require("jsts");
+var show = require("./show");  // just for showing the geometric objects during the example.
+
+var reader = new jsts.io.WKTReader();
+
+var a = reader.read('POLYGON((0 0, 0 10, 10 10, 10 0, 0 0))'); // the square between (0,0) and (10,10)
+var b = reader.read('POLYGON((5 5, 5 20, 20 20, 20 5, 5 5))'); // the square between (5,5) and (20,20)
+var c = reader.read('POLYGON((15 15, 15 20, 20 20, 20 15, 15 15))'); // the square between (15,15) and (20,20)
+var d = reader.read('POLYGON((5 5, 10 10, 5 15, 0 10, 5 5))'); // a rotated square 
+
+show("a",a);
+show("b",b);
+show("c",c);
+show("d",d);
+
+console.log(a.intersects(b)? "a intersects b": "a does not intersect b");
+show("a ^ b",a.intersection(b)); // the square between (5,5) and (10,10)
+console.log(a.intersects(c)? "a intersects c": "a does not intersect c");
+show("a ^ c",a.intersection(c)); // empty intersection
+console.log(a.intersects(d)? "a intersects d": "a does not intersect d");
+show("a ^ d",a.intersection(d)); // a RAIT
+show("a U b",a.union(b));        // octagon
+show("a U c",a.union(c));        // two disjoint squares
+show("a U d",a.union(d));        // two disjoint squares
diff --git a/examples/nodejs/show.js b/examples/nodejs/show.js
new file mode 100644
index 000000000..e4e931e7a
--- /dev/null
+++ b/examples/nodejs/show.js
@@ -0,0 +1,9 @@
+/**
+ * A simple routine for showing geometric objects in the examples.
+ */
+
+
+var util = require("util")
+module.exports = function (title, polygon) {
+  console.log(title+" = \n"+util.inspect(polygon,null,3)+" "+(polygon.isEmpty() ?" EMPTY": "NONEMPTY")+"\n\n");
+}

From 56bc6d02910e141ecf6d742c3bd540a46bea68dc Mon Sep 17 00:00:00 2001
From: erelsgl <erelsgl@gmail.com>
Date: Wed, 12 Mar 2014 08:58:40 +0200
Subject: [PATCH 2/8] rename and improve node.js examples

---
 ...t-operations.js => binary-operations-1.js} |  2 +
 ...n-operations.js => binary-operations-2.js} |  3 +-
 examples/nodejs/polygon-operations.js         | 23 ---------
 examples/nodejs/show.js                       |  7 +--
 examples/nodejs/unary-operations.js           | 47 +++++++++++++++++++
 5 files changed, 55 insertions(+), 27 deletions(-)
 rename examples/nodejs/{polygon-line-point-operations.js => binary-operations-1.js} (90%)
 rename examples/nodejs/{polygon-polygon-operations.js => binary-operations-2.js} (95%)
 delete mode 100644 examples/nodejs/polygon-operations.js
 create mode 100644 examples/nodejs/unary-operations.js

diff --git a/examples/nodejs/polygon-line-point-operations.js b/examples/nodejs/binary-operations-1.js
similarity index 90%
rename from examples/nodejs/polygon-line-point-operations.js
rename to examples/nodejs/binary-operations-1.js
index 565b2e6df..d9a152b3c 100644
--- a/examples/nodejs/polygon-line-point-operations.js
+++ b/examples/nodejs/binary-operations-1.js
@@ -26,3 +26,5 @@ show("polygon ^ line2", polygon.intersection(line2));
 show("point1 ^ polygon", point1.intersection(polygon));
 show("polygon ^ point2", polygon.intersection(point2));
 
+show("point1 ? polygon", point1.relate(polygon));
+show("polygon ? line2", polygon.relate(line2));
diff --git a/examples/nodejs/polygon-polygon-operations.js b/examples/nodejs/binary-operations-2.js
similarity index 95%
rename from examples/nodejs/polygon-polygon-operations.js
rename to examples/nodejs/binary-operations-2.js
index 87f9b102c..de0d294af 100644
--- a/examples/nodejs/polygon-polygon-operations.js
+++ b/examples/nodejs/binary-operations-2.js
@@ -25,4 +25,5 @@ console.log(a.intersects(d)? "a intersects d": "a does not intersect d");
 show("a ^ d",a.intersection(d)); // a RAIT
 show("a U b",a.union(b));        // octagon
 show("a U c",a.union(c));        // two disjoint squares
-show("a U d",a.union(d));        // two disjoint squares
+show("a U d",a.union(d));        // a house-shaped pentagon
+
diff --git a/examples/nodejs/polygon-operations.js b/examples/nodejs/polygon-operations.js
deleted file mode 100644
index a94ea3900..000000000
--- a/examples/nodejs/polygon-operations.js
+++ /dev/null
@@ -1,23 +0,0 @@
-/**
- * Example of constructing and translating polygons..
- */
-
-var jsts = require("jsts");
-var factory = new jsts.geom.GeometryFactory();
-
-var show = require("./show");  // just for showing the geometric objects during the example.
-
-
-// some shorthands:
-
-function coord(x,y)  {  return new jsts.geom.Coordinate(x,y); }
-function coordlist(array) {  return new jsts.geom.CoordinateList(array); }
-
-var a = factory.createPolygon(coordlist([coord(0, 0), coord(0, 10), coord(10, 10), coord(10, 0), coord(0, 0)]));
-var b = factory.createPolygon(coordlist([coord(5, 5), coord(5, 20), coord(20, 20), coord(20, 5), coord(5, 5)]));
-show("a",a);
-show("b",b);
-
-console.log(a.intersects(b)? "a intersects b": "a does not intersect b");
-show("a ^ b",a.intersection(b)); // the square between (5,5) and (10,10)
-
diff --git a/examples/nodejs/show.js b/examples/nodejs/show.js
index e4e931e7a..e2780dbf7 100644
--- a/examples/nodejs/show.js
+++ b/examples/nodejs/show.js
@@ -3,7 +3,8 @@
  */
 
 
-var util = require("util")
+//var util = require("util");
 module.exports = function (title, polygon) {
-  console.log(title+" = \n"+util.inspect(polygon,null,3)+" "+(polygon.isEmpty() ?" EMPTY": "NONEMPTY")+"\n\n");
-}
+  //console.log(title+" = \n"+util.inspect(polygon,null,3)+" "+(polygon.isEmpty? (polygon.isEmpty() ?" EMPTY": "NONEMPTY"): "")+"\n\n");
+  console.log(title+" = "+polygon.toString()+" "+(polygon.isEmpty? (polygon.isEmpty() ?" EMPTY": "NONEMPTY"): "")+"\n\n");
+};
diff --git a/examples/nodejs/unary-operations.js b/examples/nodejs/unary-operations.js
new file mode 100644
index 000000000..25bec1455
--- /dev/null
+++ b/examples/nodejs/unary-operations.js
@@ -0,0 +1,47 @@
+/**
+ * Example of constructing and translating polygons.
+ */
+var jsts = require("jsts");
+var factory = new jsts.geom.GeometryFactory();
+
+var show = require("./show");  // just for showing the geometric objects during the example.
+
+
+// some shorthands:
+
+function coord(x,y)  {  return new jsts.geom.Coordinate(x,y); }
+function linstr(coords) {  return factory.createLineString(coords); }
+function linring(coords) {  return factory.createLinearRing(coords); }
+function polygon(coords,holes)  { return factory.createPolygon(linring(coords),holes); }
+
+var a = polygon([coord(0, 0), coord(0, 10), coord(10, 10), coord(10, 0), coord(0, 0)]);
+var b = polygon([coord(5, 5), coord(5, 20), coord(20, 20), coord(20, 5), coord(5, 5)]);
+var c = linstr([coord(3,0), coord(3,10)]);
+show("a",a);
+show("b",b);
+show("c",c);
+
+show("a.centroid", a.getCentroid()); //(5,5)
+show("b.centroid", b.getCentroid()); //(12.5,12.5)
+show("c.centroid", c.getCentroid()); //(3,5)
+
+show("a.dimension", a.getDimension()); // 2
+show("b.dimension", b.getDimension()); // 2
+show("c.dimension", c.getDimension()); // 1
+
+show("a.type", a.getGeometryType()); // Geometry
+show("b.type", b.getGeometryType()); // Geometry
+show("c.type", c.getGeometryType()); // LineString
+
+show("a.length", a.getLength()); // 40
+show("b.length", b.getLength()); // 60
+show("c.length", c.getLength()); // 10
+
+//show("a.numpoints", a.getNumPoints()); // 40
+//show("b.numpoints", b.getNumPoints()); // 60
+//show("c.numpoints", c.getNumPoints()); // 10
+
+
+show("a.isRectangle", a.isRectangle()); // false?!
+show("b.isRectangle", b.isRectangle()); // false?!
+show("c.isRectangle", c.isRectangle()); // false?!

From 57dacc11b528939c2f7b777efce9e551426e6134 Mon Sep 17 00:00:00 2001
From: erelsgl <erelsgl@gmail.com>
Date: Wed, 12 Mar 2014 11:25:50 +0200
Subject: [PATCH 3/8] add getArea

---
 examples/nodejs/unary-operations.js | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/examples/nodejs/unary-operations.js b/examples/nodejs/unary-operations.js
index 25bec1455..37c3c09a4 100644
--- a/examples/nodejs/unary-operations.js
+++ b/examples/nodejs/unary-operations.js
@@ -37,11 +37,6 @@ show("a.length", a.getLength()); // 40
 show("b.length", b.getLength()); // 60
 show("c.length", c.getLength()); // 10
 
-//show("a.numpoints", a.getNumPoints()); // 40
-//show("b.numpoints", b.getNumPoints()); // 60
-//show("c.numpoints", c.getNumPoints()); // 10
-
-
-show("a.isRectangle", a.isRectangle()); // false?!
-show("b.isRectangle", b.isRectangle()); // false?!
-show("c.isRectangle", c.isRectangle()); // false?!
+show("a.area", a.getArea()); // 100 (10x10)
+show("b.area", b.getArea()); // 225 (15x15)
+// show("c.area", c.getArea()); // error: a linestring doesn't have area

From efb1c7e2fa4d08cbbc9ce7c702cfdbff6bb5c8ea Mon Sep 17 00:00:00 2001
From: erelsgl <erelsgl@gmail.com>
Date: Wed, 12 Mar 2014 11:40:32 +0200
Subject: [PATCH 4/8] add examples of normalization and comparison

---
 examples/nodejs/binary-operations-2.js | 15 ++++++++++++++-
 examples/nodejs/unary-operations.js    |  1 +
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/examples/nodejs/binary-operations-2.js b/examples/nodejs/binary-operations-2.js
index de0d294af..80a6b56cd 100644
--- a/examples/nodejs/binary-operations-2.js
+++ b/examples/nodejs/binary-operations-2.js
@@ -18,11 +18,24 @@ show("c",c);
 show("d",d);
 
 console.log(a.intersects(b)? "a intersects b": "a does not intersect b");
-show("a ^ b",a.intersection(b)); // the square between (5,5) and (10,10)
+var a_intersection_b = a.intersection(b);
+show("a ^ b",a_intersection_b); // the square between (5,5) and (10,10)
+var e = reader.read('POLYGON((5 5, 5 10, 10 10, 10 5, 5 5))'); // also the square between (5,5) and (10,10)
+show("e",e);
+show("a^b equalsExact e",a_intersection_b.equalsExact(e)); // false
+show("a^b equalsTopo  e",a_intersection_b.equalsTopo(e));  // true
+a_intersection_b = a_intersection_b.norm();
+e = e.norm();
+show("a^b normalized",a_intersection_b);
+show("e normalized",e);
+show("a^b normalized equalsExact e normalized",a_intersection_b.equalsExact(e)); // false
+
 console.log(a.intersects(c)? "a intersects c": "a does not intersect c");
 show("a ^ c",a.intersection(c)); // empty intersection
+
 console.log(a.intersects(d)? "a intersects d": "a does not intersect d");
 show("a ^ d",a.intersection(d)); // a RAIT
+
 show("a U b",a.union(b));        // octagon
 show("a U c",a.union(c));        // two disjoint squares
 show("a U d",a.union(d));        // a house-shaped pentagon
diff --git a/examples/nodejs/unary-operations.js b/examples/nodejs/unary-operations.js
index 37c3c09a4..beb5a977b 100644
--- a/examples/nodejs/unary-operations.js
+++ b/examples/nodejs/unary-operations.js
@@ -39,4 +39,5 @@ show("c.length", c.getLength()); // 10
 
 show("a.area", a.getArea()); // 100 (10x10)
 show("b.area", b.getArea()); // 225 (15x15)
+
 // show("c.area", c.getArea()); // error: a linestring doesn't have area

From 90e3dcc4f36fd0fc78b429344a80b7a74e436141 Mon Sep 17 00:00:00 2001
From: erelsgl <erelsgl@gmail.com>
Date: Wed, 12 Mar 2014 13:21:41 +0200
Subject: [PATCH 5/8] add envelope

---
 examples/nodejs/binary-operations-2.js |  2 +-
 examples/nodejs/unary-operations.js    | 16 +++++++++++-----
 2 files changed, 12 insertions(+), 6 deletions(-)

diff --git a/examples/nodejs/binary-operations-2.js b/examples/nodejs/binary-operations-2.js
index 80a6b56cd..3f30851cd 100644
--- a/examples/nodejs/binary-operations-2.js
+++ b/examples/nodejs/binary-operations-2.js
@@ -1,5 +1,5 @@
 /**
- * Example of calculating intersection and union between polygons.
+ * Example of calculating intersection and union between polygons, normalization and equality checking.
  */
 
 var jsts = require("jsts");
diff --git a/examples/nodejs/unary-operations.js b/examples/nodejs/unary-operations.js
index beb5a977b..dcdb0a33c 100644
--- a/examples/nodejs/unary-operations.js
+++ b/examples/nodejs/unary-operations.js
@@ -15,14 +15,14 @@ function linring(coords) {  return factory.createLinearRing(coords); }
 function polygon(coords,holes)  { return factory.createPolygon(linring(coords),holes); }
 
 var a = polygon([coord(0, 0), coord(0, 10), coord(10, 10), coord(10, 0), coord(0, 0)]);
-var b = polygon([coord(5, 5), coord(5, 20), coord(20, 20), coord(20, 5), coord(5, 5)]);
+var b = polygon([coord(5, 5), coord(10, 10), coord(5, 15), coord(0, 10), coord(5, 5)]);
 var c = linstr([coord(3,0), coord(3,10)]);
 show("a",a);
 show("b",b);
 show("c",c);
 
 show("a.centroid", a.getCentroid()); //(5,5)
-show("b.centroid", b.getCentroid()); //(12.5,12.5)
+show("b.centroid", b.getCentroid()); //(5,10)
 show("c.centroid", c.getCentroid()); //(3,5)
 
 show("a.dimension", a.getDimension()); // 2
@@ -34,10 +34,16 @@ show("b.type", b.getGeometryType()); // Geometry
 show("c.type", c.getGeometryType()); // LineString
 
 show("a.length", a.getLength()); // 40
-show("b.length", b.getLength()); // 60
+show("b.length", b.getLength()); // 20*sqrt(2)
 show("c.length", c.getLength()); // 10
 
 show("a.area", a.getArea()); // 100 (10x10)
-show("b.area", b.getArea()); // 225 (15x15)
+show("b.area", b.getArea()); // 50 (100/2)
+//show("c.area", c.getArea()); // error: a linestring doesn't have area
 
-// show("c.area", c.getArea()); // error: a linestring doesn't have area
+show("a.envelope", a.getEnvelope()); // == a
+show("b.envelope", b.getEnvelope()); // = the square [0,10]x[5,15]
+show("c.envelope", c.getEnvelope()); // == c
+
+show("a.envelope.area", a.getEnvelope().getArea()); // 100
+show("b.envelope.area", b.getEnvelope().getArea()); // 100

From 83bf779acbb65de526b69e82b78c401be3c7178b Mon Sep 17 00:00:00 2001
From: erelsgl <erelsgl@gmail.com>
Date: Wed, 12 Mar 2014 16:19:01 +0200
Subject: [PATCH 6/8] add relations demo

---
 examples/nodejs/relations.js | 44 ++++++++++++++++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 examples/nodejs/relations.js

diff --git a/examples/nodejs/relations.js b/examples/nodejs/relations.js
new file mode 100644
index 000000000..0a1fdfb5f
--- /dev/null
+++ b/examples/nodejs/relations.js
@@ -0,0 +1,44 @@
+/**
+ * Example of calculating intersection between a polygon and a line or a point.
+ */
+
+var jsts = require("jsts");
+
+var reader = new jsts.io.WKTReader();
+
+function booleanRelationToString(shape1, shape2, relationName) {
+  var relationHolds = shape1[relationName](shape2);
+  if (relationHolds) {
+    return relationName+"s";
+  } else {
+    return "does not "+relationName;
+  }
+}
+
+var polygon = reader.read('POLYGON((0 0, 0 10, 10 10, 10 0, 0 0))'); // the square between (0,0) and (10,10)
+
+var points = {};
+points.internal = reader.read("POINT(7 7)");    // a point inside the square
+points.boundary = reader.read("POINT(10 5)");    // a point on the boundary of the square
+points.external = reader.read("POINT(11 11)");  // a point outside the square
+
+var relations = [
+    "disjoint", "touches", 
+    "intersects", //"crosses", 
+    "within", "contains",
+    "overlaps",
+    //"covers", "coveredBy", 
+    "relate"
+    ];
+
+
+for (var p in points) {
+  console.log("\n"+p+"\n--------\n");
+  var point = points[p];
+  for (var r in relations) {
+    var relation = relations[r];
+    console.log("polygon."+relation+"("+p+") = "+polygon[relation](point));
+    console.log(p+"."+relation+"(polygon) = "+point[relation](polygon));
+  }
+}
+

From b605086cdb8de508165776d232675ccad635b253 Mon Sep 17 00:00:00 2001
From: erelsgl <erelsgl@gmail.com>
Date: Wed, 12 Mar 2014 21:56:52 +0200
Subject: [PATCH 7/8] add more relations

---
 examples/nodejs/binary-operations-1.js |  3 ---
 examples/nodejs/relations.js           | 26 +++++++++++++++-----------
 2 files changed, 15 insertions(+), 14 deletions(-)

diff --git a/examples/nodejs/binary-operations-1.js b/examples/nodejs/binary-operations-1.js
index d9a152b3c..5d5cf3017 100644
--- a/examples/nodejs/binary-operations-1.js
+++ b/examples/nodejs/binary-operations-1.js
@@ -25,6 +25,3 @@ show("polygon ^ line2", polygon.intersection(line2));
 
 show("point1 ^ polygon", point1.intersection(polygon));
 show("polygon ^ point2", polygon.intersection(point2));
-
-show("point1 ? polygon", point1.relate(polygon));
-show("polygon ? line2", polygon.relate(line2));
diff --git a/examples/nodejs/relations.js b/examples/nodejs/relations.js
index 0a1fdfb5f..a0d88f712 100644
--- a/examples/nodejs/relations.js
+++ b/examples/nodejs/relations.js
@@ -1,5 +1,5 @@
 /**
- * Example of calculating intersection between a polygon and a line or a point.
+ * Example of calculating intersection between a reference and a line or a point.
  */
 
 var jsts = require("jsts");
@@ -15,12 +15,16 @@ function booleanRelationToString(shape1, shape2, relationName) {
   }
 }
 
-var polygon = reader.read('POLYGON((0 0, 0 10, 10 10, 10 0, 0 0))'); // the square between (0,0) and (10,10)
+var reference = reader.read('POLYGON((0 0, 0 10, 10 10, 10 0, 0 0))'); // the square between (0,0) and (10,10)
 
-var points = {};
-points.internal = reader.read("POINT(7 7)");    // a point inside the square
-points.boundary = reader.read("POINT(10 5)");    // a point on the boundary of the square
-points.external = reader.read("POINT(11 11)");  // a point outside the square
+var others = {};
+others.internalPoint = reader.read("POINT(7 7)");    // a point inside the square
+others.boundaryPoint = reader.read("POINT(10 5)");    // a point on the boundary of the square
+others.externalPoint = reader.read("POINT(11 11)");  // a point outside the square
+others.farawaySquare = reader.read('POLYGON((20 20, 20 30, 30 30, 30 20, 20 20))'); // the square between (20,20) and (30,30)
+others.cornerSquare = reader.read('POLYGON((10 10, 10 30, 30 30, 30 10, 10 10))'); // the square between (10,10) and (30,30)
+others.sideSquare = reader.read('POLYGON((10 0, 10 30, 30 30, 30 0, 10 0))'); // the rectangle between (10,0) and (30,30)
+others.overlappingSquare = reader.read('POLYGON((5 5, 5 20, 20 20, 20 5, 5 5))'); // the square between (5,5) and (20,20)
 
 var relations = [
     "disjoint", "touches", 
@@ -32,13 +36,13 @@ var relations = [
     ];
 
 
-for (var p in points) {
-  console.log("\n"+p+"\n--------\n");
-  var point = points[p];
+for (var p in others) {
+  console.log("\n"+p+"\n-----------------\n");
+  var point = others[p];
   for (var r in relations) {
     var relation = relations[r];
-    console.log("polygon."+relation+"("+p+") = "+polygon[relation](point));
-    console.log(p+"."+relation+"(polygon) = "+point[relation](polygon));
+    console.log("reference."+relation+"("+p+") = "+reference[relation](point));
+    console.log(p+"."+relation+"(reference) = "+point[relation](reference));
   }
 }
 

From 4106a7bb2f767aeab7934de0dd89e5e4f55b9945 Mon Sep 17 00:00:00 2001
From: erelsgl <erelsgl@gmail.com>
Date: Wed, 12 Mar 2014 22:00:15 +0200
Subject: [PATCH 8/8] relations doc

---
 examples/nodejs/relations.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/examples/nodejs/relations.js b/examples/nodejs/relations.js
index a0d88f712..aa4727696 100644
--- a/examples/nodejs/relations.js
+++ b/examples/nodejs/relations.js
@@ -1,5 +1,5 @@
 /**
- * Example of calculating intersection between a reference and a line or a point.
+ * Calculating the various boolean relations (overlaps, contains, etc.)
  */
 
 var jsts = require("jsts");