X-Git-Url: http://www2.svjatoslav.eu/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Feu%2Fsvjatoslav%2Fsixth%2Fe3d%2Fgeometry%2FPoint3D.java;h=120ea323ac139c27db1d932dc1fae8941d0800d4;hb=a3ff3683bd0a025061667b26b6fcf56fe20f0afc;hp=1c8700a5bda10161ac3d8ba261f0f5e716dea83b;hpb=3e2b906bd05617a4d9725de39ac14c9ea1f8736c;p=sixth-3d.git

diff --git a/src/main/java/eu/svjatoslav/sixth/e3d/geometry/Point3D.java b/src/main/java/eu/svjatoslav/sixth/e3d/geometry/Point3D.java
index 1c8700a..120ea32 100755
--- a/src/main/java/eu/svjatoslav/sixth/e3d/geometry/Point3D.java
+++ b/src/main/java/eu/svjatoslav/sixth/e3d/geometry/Point3D.java
@@ -1,5 +1,5 @@
 /*
- * Sixth 3D engine. Author: Svjatoslav Agejenko. 
+ * Sixth 3D engine. Author: Svjatoslav Agejenko.
  * This project is released under Creative Commons Zero (CC0) license.
  */
 package eu.svjatoslav.sixth.e3d.geometry;
@@ -58,6 +58,21 @@ public class Point3D implements Cloneable {
         return this;
     }
 
+    /**
+     * Add coordinates of current point to other point. Value of current point will not be changed.
+     *
+     * @return current point.
+     */
+    public Point3D addTo(final Point3D... otherPoints) {
+        for (final Point3D otherPoint : otherPoints) otherPoint.add(this);
+        return this;
+    }
+
+    /**
+     * Create new point by cloning position of current point.
+     *
+     * @return newly created clone.
+     */
     public Point3D clone() {
         return new Point3D(this);
     }
@@ -143,12 +158,12 @@ public class Point3D implements Cloneable {
      * <p>
      * See also: <a href="https://marctenbosch.com/quaternions/">Let's remove Quaternions from every 3D Engine</a>
      *
-     * @param center   center point.
+     * @param center  center point.
      * @param angleXZ angle around XZ axis.
      * @param angleYZ angle around YZ axis.
      */
-    public void rotate(final Point3D center, final double angleXZ,
-                       final double angleYZ) {
+    public Point3D rotate(final Point3D center, final double angleXZ,
+                          final double angleYZ) {
         final double s1 = sin(angleXZ);
         final double c1 = cos(angleXZ);
 
@@ -168,6 +183,12 @@ public class Point3D implements Cloneable {
         x = x1 + center.x;
         y = y1 + center.y;
         z = z2 + center.z;
+
+        return this;
+    }
+
+    public Point3D rotate(final double angleXZ, final double angleYZ) {
+        return rotate(new Point3D(0, 0, 0), angleXZ, angleYZ);
     }
 
     /**
@@ -209,6 +230,7 @@ public class Point3D implements Cloneable {
 
     /**
      * Set current point coordinates to given values.
+     *
      * @param x X coordinate.
      * @param y Y coordinate.
      * @param z Z coordinate.