X-Git-Url: http://www2.svjatoslav.eu/gitweb/?p=sixth-3d.git;a=blobdiff_plain;f=src%2Fmain%2Fjava%2Feu%2Fsvjatoslav%2Fsixth%2Fe3d%2Fgeometry%2FPoint2D.java;h=1cfd39c246e6319c7d8a0d0fe1af9b223e452195;hp=f8fbef9ff43a7700f5ec015b9c0095c826bc2e7f;hb=baab2e2c2ad89695293f3136311c585c9a5afed1;hpb=2e7e46514dd35006e9dde07b1959540078292691

diff --git a/src/main/java/eu/svjatoslav/sixth/e3d/geometry/Point2D.java b/src/main/java/eu/svjatoslav/sixth/e3d/geometry/Point2D.java
index f8fbef9..1cfd39c 100755
--- a/src/main/java/eu/svjatoslav/sixth/e3d/geometry/Point2D.java
+++ b/src/main/java/eu/svjatoslav/sixth/e3d/geometry/Point2D.java
@@ -9,6 +9,8 @@
 
 package eu.svjatoslav.sixth.e3d.geometry;
 
+import static java.lang.Math.sqrt;
+
 public class Point2D implements Cloneable {
 
     public double x, y;
@@ -32,6 +34,10 @@ public class Point2D implements Cloneable {
         return this;
     }
 
+    public boolean isZero(){
+        return (x == 0) && (y == 0);
+    }
+
     @Override
     public Point2D clone() {
         return new Point2D(this);
@@ -42,7 +48,7 @@ public class Point2D implements Cloneable {
         y = source.y;
     }
 
-    public Point2D computeMiddlePoint(final Point2D p1, final Point2D p2) {
+    public Point2D getMiddle(final Point2D p1, final Point2D p2) {
         x = (p1.x + p2.x) / 2d;
         y = (p1.y + p2.y) / 2d;
         return this;
@@ -52,11 +58,18 @@ public class Point2D implements Cloneable {
         return Math.atan2(x - anotherPoint.x, y - anotherPoint.y);
     }
 
+    /**
+     * Compute distance to another point.
+     */
     public double getDistanceTo(final Point2D anotherPoint) {
         final double xDiff = x - anotherPoint.x;
         final double yDiff = y - anotherPoint.y;
 
-        return Math.sqrt(((xDiff * xDiff) + (yDiff * yDiff)));
+        return sqrt(((xDiff * xDiff) + (yDiff * yDiff)));
+    }
+
+    public double getVectorLength() {
+        return sqrt(((x * x) + (y * y)));
     }
 
     public Point2D invert() {
@@ -70,9 +83,9 @@ public class Point2D implements Cloneable {
         y = (int) y;
     }
 
-    public Point2D subtract(final Point2D direction) {
-        x -= direction.x;
-        y -= direction.y;
+    public Point2D subtract(final Point2D point) {
+        x -= point.x;
+        y -= point.y;
         return this;
     }