X-Git-Url: http://www2.svjatoslav.eu/gitweb/?a=blobdiff_plain;f=src%2Fmain%2Fjava%2Feu%2Fsvjatoslav%2Fsixth%2Fe3d%2Fgui%2FUserRelativityTracker.java;h=d491b0fe55da242210a1884530fdcb20a401fecb;hb=HEAD;hp=dd706db3929d1790e3bf89d05be82843523210a1;hpb=a2131986d65a769e3d589e4e0370d4af0ce10c38;p=sixth-3d.git

diff --git a/src/main/java/eu/svjatoslav/sixth/e3d/gui/UserRelativityTracker.java b/src/main/java/eu/svjatoslav/sixth/e3d/gui/UserRelativityTracker.java
index dd706db..d491b0f 100644
--- a/src/main/java/eu/svjatoslav/sixth/e3d/gui/UserRelativityTracker.java
+++ b/src/main/java/eu/svjatoslav/sixth/e3d/gui/UserRelativityTracker.java
@@ -18,8 +18,22 @@ import eu.svjatoslav.sixth.e3d.math.Vertex;
 public class UserRelativityTracker {
 
     private final static int minimalSliceFactor = 5;
+
+    /**
+     * Points to 0, 0, 0 in object own relative space.
+     */
     public Vertex center = new Vertex();
+
+    /**
+     * Points to 10, 0, 0 in object own relative space if orientation tracking is enabled.
+     * It is used to determine the angle between the user and the object.
+     */
     public Vertex right;
+
+    /**
+     * Points to 0, 10, 0 in object own relative space if orientation tracking is enabled.
+     * It is used to determine the angle between the user and the object.
+     */
     public Vertex down;
 
     public UserRelativityTracker() {
@@ -31,32 +45,53 @@ public class UserRelativityTracker {
 
         center.calculateLocationRelativeToViewer(transformPipe, renderingContext);
 
-        if (right != null) {
+        if (right != null) { // If orientation tracking is enabled.
             right.calculateLocationRelativeToViewer(transformPipe, renderingContext);
             down.calculateLocationRelativeToViewer(transformPipe, renderingContext);
         }
     }
 
+    /**
+     * Initializes the orientation tracking.
+     * Orientation tracking is used to determine the angle between the user and the object.
+     * Orientation tracking is disabled by default and it is optional.
+     */
     public void enableOrientationTracking() {
         right = new Vertex(new Point3D(10, 0, 0));
         down = new Vertex(new Point3D(0, 10, 0));
     }
 
+    /**
+     * Calculates the angle between the user and the object in the XY plane.
+     * @return the angle between the user and the object in the XY plane.
+     */
     public double getAngleXY() {
         return center.transformedCoordinate
                 .getAngleXY(down.transformedCoordinate);
     }
 
+    /**
+     * Calculates the angle between the user and the object in the XZ plane.
+     * @return the angle between the user and the object in the XZ plane.
+     */
     public double getAngleXZ() {
         return center.transformedCoordinate
                 .getAngleXZ(right.transformedCoordinate);
     }
 
+    /**
+     * Calculates the angle between the user and the object in the YZ plane.
+     * @return the angle between the user and the object in the YZ plane.
+     */
     public double getAngleYZ() {
         return center.transformedCoordinate
                 .getAngleYZ(down.transformedCoordinate);
     }
 
+    /**
+     * Calculates the distance between the user and the object.
+     * Distance to the user can be used to determine object detail level.
+     */
     public double getDistanceToUser() {
         return center.transformedCoordinate.getVectorLength();
     }