correct more grammar/spelling errors in comments

jme3-core/src/main/java/com/jme3/cinematic/MotionPathListener.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2012 jMonkeyEngine
+ * Copyright (c) 2009-2018 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -34,7 +34,7 @@ package com.jme3.cinematic;
 import com.jme3.cinematic.events.MotionEvent;
 
 /**
- * Trigger the events happening on an motion path
+ * Trigger the events happening on a motion path
  * @author Nehon
  */
 public interface MotionPathListener {

jme3-core/src/main/java/com/jme3/input/Joystick.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2012 jMonkeyEngine
+ * Copyright (c) 2009-2018 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -123,7 +123,7 @@ public interface Joystick {
 
     /**
      * Returns the POV Y axis for this joystick.  This is a convenience axis 
-     * providing an y-axis subview of the HAT axis.
+     * providing a y-axis subview of the HAT axis.
      *
      * @see JoystickAxis#assignAxis(java.lang.String, java.lang.String)
      */

jme3-core/src/main/java/com/jme3/math/FastMath.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2012 jMonkeyEngine
+ * Copyright (c) 2009-2018 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -860,7 +860,7 @@ final public class FastMath {
     }
 
     /**
-     * Takes an value and expresses it in terms of min to max.
+     * Takes a value and expresses it in terms of min to max.
      * 
      * @param val -
      *            the angle to normalize (in radians)

jme3-core/src/main/java/com/jme3/shader/Glsl100ShaderGenerator.java

@@ -623,7 +623,7 @@ public class Glsl100ShaderGenerator extends ShaderGenerator {
     /**
      * Declares a varying
      * @param source the StringBuilder to use
-     * @param var the variable to declare as an varying
+     * @param var the variable to declare as a varying
      * @param input a boolean set to true if the this varying is an input.
      * this in not used in this implementation but can be used in overriding 
      * implementation

jme3-core/src/plugins/java/com/jme3/export/binary/ByteUtils.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2012 jMonkeyEngine
+ * Copyright (c) 2009-2018 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -269,7 +269,7 @@ public class ByteUtils {
     }
 
     public static long convertLongFromBytes(byte[] bytes, int offset) {
-        // Convert it to an long
+        // Convert it to a long
         return    ((((long) bytes[offset+7]) & 0xFF) 
                 + ((((long) bytes[offset+6]) & 0xFF) << 8)
                 + ((((long) bytes[offset+5]) & 0xFF) << 16)
@@ -340,7 +340,7 @@ public class ByteUtils {
     //  **********  byte <> float  METHODS  **********
 
     /**
-     * Writes an float out to an OutputStream.
+     * Writes a float out to an OutputStream.
      * 
      * @param outputStream
      *            The OutputStream the float will be written to

jme3-desktop/src/main/java/jme3tools/navigation/Coordinate.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2012 jMonkeyEngine
+ * Copyright (c) 2009-2018 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -116,7 +116,7 @@ public class Coordinate {
      * This constructor takes a coordinate in the ALRS formats i.e
      * 38∞31.64'N for lat, and 28∞19.12'W for long
      * Note: ALRS positions are occasionally written with the decimal minutes
-     * apostrophe in the 'wrong' place and with an non CP1252 compliant decimal character.
+     * apostrophe in the 'wrong' place and with a non CP1252 compliant decimal character.
      * This issue has to be corrected in the source database
      * @param coOrdinate
      * @throws InvalidPositionException

jme3-effects/src/main/java/com/jme3/post/filters/RadialBlurFilter.java

@@ -124,7 +124,7 @@ public class RadialBlurFilter extends Filter {
     }
 
     /**
-     * sets the sample streanght default is 2.2
+     * sets the sample strength default is 2.2
      * @param sampleStrength 
      */
     public void setSampleStrength(float sampleStrength) {

jme3-effects/src/main/java/com/jme3/water/WaterFilter.java

@@ -569,8 +569,8 @@ public class WaterFilter extends Filter implements JmeCloneable, Cloneable {
     /**
      * This is a constant related to the index of refraction (IOR) used to compute the fresnel term.
      * F = R0 + (1-R0)( 1 - N.V)^5
-     * where F is the fresnel term, R0 the constant, N the normal vector and V tne view vector.
-     * It usually depend on the material you are lookinh through (here water).
+     * where F is the fresnel term, R0 the constant, N the normal vector and V the view vector.
+     * It usually depend on the material you are looking through (here water).
      * Default value is 0.3f
      * In practice, the lowest the value and the less the reflection can be seen on water
      * @param refractionConstant
@@ -683,7 +683,7 @@ public class WaterFilter extends Filter implements JmeCloneable, Cloneable {
     }
 
     /**
-     * returns the refractionStrenght
+     * returns the refractionStrength
      * @return
      */
     public float getRefractionStrength() {
@@ -692,7 +692,7 @@ public class WaterFilter extends Filter implements JmeCloneable, Cloneable {
 
     /**
      * This value modifies current fresnel term. If you want to weaken
-     * reflections use bigger value. If you want to empasize them use
+     * reflections use bigger value. If you want to emphasize them use
      * value smaller then 0. Default is 0.0f.
      * @param refractionStrength
      */
@@ -725,7 +725,7 @@ public class WaterFilter extends Filter implements JmeCloneable, Cloneable {
     }
 
     /**
-     * returns the foam existance vector
+     * returns the foam existence vector
      * @return
      */
     public Vector3f getFoamExistence() {
@@ -766,7 +766,7 @@ public class WaterFilter extends Filter implements JmeCloneable, Cloneable {
     }
 
     /**
-     * Returns the color exctinction vector of the water
+     * Returns the color extinction vector of the water
      * @return
      */
     public Vector3f getColorExtinction() {
@@ -778,7 +778,7 @@ public class WaterFilter extends Filter implements JmeCloneable, Cloneable {
      * the first value is for red
      * the second is for green
      * the third is for blue
-     * Play with thos parameters to "trouble" the water
+     * Play with those parameters to "trouble" the water
      * default is (5.0, 20.0, 30.0f);
      * @param colorExtinction
      */

jme3-examples/src/main/java/jme3test/model/anim/TestAttachmentsNode.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2017 jMonkeyEngine
+ * Copyright (c) 2009-2018 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -51,7 +51,7 @@ import com.jme3.scene.Spatial;
 import com.jme3.scene.shape.Box;
 
 /**
- * Simple application to an test attachments node on the Jaime model.
+ * Simple application to test an attachments node on the Jaime model.
  *
  * Derived from {@link jme3test.model.anim.TestOgreAnim}.
  */

jme3-examples/src/main/java/jme3test/renderer/TestAspectRatio.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2017 jMonkeyEngine
+ * Copyright (c) 2009-2018 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -38,7 +38,7 @@ import com.jme3.scene.Geometry;
 import com.jme3.scene.shape.Box;
 
 /**
- * Simple application to an test a viewport/camera with a different aspect ratio
+ * Simple application to test a viewport/camera with a different aspect ratio
  * than the display -- issue #357. The cube should render as a blue square, not
  * a rectangle.
  *

jme3-jogg/src/main/java/com/jme3/audio/plugins/OGGLoader.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2012 jMonkeyEngine
+ * Copyright (c) 2009-2018 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -152,7 +152,7 @@ public class OGGLoader implements AssetLoader {
                 // HACK: Reload the logical and vorbis streams from scratch
                 // based on the existing ogg page data. 
                 // This fixes an audio discontinuity issue when looping
-                // an streaming OGG file via setTime(0).
+                // a streaming OGG file via setTime(0).
                 ls = ((CachedOggStream) ps).reloadLogicalOggStream();
                 vs = new VorbisStream(ls);
                 endOfStream = false;

jme3-terrain/src/main/java/com/jme3/terrain/heightmap/FaultHeightMap.java

@@ -37,7 +37,7 @@ import java.util.logging.Level;
 import java.util.logging.Logger;
 
 /**
- * Creates an heightmap based on the fault algorithm. Each iteration, a random line
+ * Creates a heightmap based on the fault algorithm. Each iteration, a random line
  * crossing the map is generated. On one side height values are raised, on the other side
  * lowered.
  * @author cghislai
@@ -118,7 +118,7 @@ public class FaultHeightMap extends AbstractHeightMap {
     }
 
     /**
-     * Create an heightmap with linear step faults.
+     * Create a heightmap with linear step faults.
      * @param size size of heightmap
      * @param iterations number of iterations
      * @param minFaultHeight Height modified on each side

jme3-terrain/src/main/java/com/jme3/terrain/heightmap/MidpointDisplacementHeightMap.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2009-2012 jMonkeyEngine
+ * Copyright (c) 2009-2018 jMonkeyEngine
  * All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
@@ -37,7 +37,7 @@ import java.util.logging.Level;
 import java.util.logging.Logger;
 
 /**
- * <code>MidpointDisplacementHeightMap</code> generates an heightmap based on
+ * <code>MidpointDisplacementHeightMap</code> generates a heightmap based on
  * the midpoint displacement algorithm. See Constructor javadoc for more info.
  * @author cghislai
  */
@@ -50,7 +50,7 @@ public class MidpointDisplacementHeightMap extends AbstractHeightMap {
 
     /**
      * The constructor generates the heightmap. After the first 4 corners are
-     * randomly given an height, the center will be heighted to the average of
+     * randomly given a height, the center will be heighted to the average of
      * the 4 corners to which a random value is added. Then other passes fill
      * the heightmap by the same principle.
      * The random value is generated between the values <code>-range</code>
@@ -87,7 +87,7 @@ public class MidpointDisplacementHeightMap extends AbstractHeightMap {
 
     /**
      * The constructor generates the heightmap. After the first 4 corners are
-     * randomly given an height, the center will be heighted to the average of
+     * randomly given a height, the center will be heighted to the average of
      * the 4 corners to which a random value is added. Then other passes fill
      * the heightmap by the same principle.
      * The random value is generated between the values <code>-range</code>
@@ -156,10 +156,10 @@ public class MidpointDisplacementHeightMap extends AbstractHeightMap {
 
     /**
      * Will fill the value at (coords[0]+stepSize/2, coords[1]+stepSize/2) with
-     * the average from the corners of the square with topleft corner at (coords[0],coords[1])
+     * the average from the corners of the square with top, left corner at (coords[0],coords[1])
      * and width of stepSize.
-     * @param tempBuffer the temprary heightmap
-     * @param coords an int array of lenght 2 with the x coord in position 0
+     * @param tempBuffer the temporary heightmap
+     * @param coords an int array of length 2 with the x coord in position 0
      * @param stepSize the size of the square
      * @param offsetRange the offset range within a random value is picked and added to the average
      * @param random the random generator

jme3-vr/src/main/java/com/jme3/input/vr/VRAPI.java

@@ -92,8 +92,8 @@ public interface VRAPI {
     public void reset();
 
     /**
-     * Get the size of an Head Mounted Device (HMD) rendering area in pixels.
-     * @param store the size of an Head Mounted Device (HMD) rendering area in pixels (modified).
+     * Get the size of a Head Mounted Device (HMD) rendering area in pixels.
+     * @param store the size of a Head Mounted Device (HMD) rendering area in pixels (modified).
      */
     public void getRenderSize(Vector2f store);
     

jme3-vr/src/main/java/com/jme3/input/vr/VRInputAPI.java

@@ -89,16 +89,16 @@ public interface VRInputAPI {
     public boolean init();
     
     /**
-     * Get the number of tracked controller (for example an hand controllers) attached to the VR system.
-     * @return the number of controller attached to the VR system.
+     * Get the number of tracked controllers (for example, hand controllers) attached to the VR system.
+     * @return the number of controllers attached to the VR system.
      * @see #getTrackedController(int)
      */
     public int getTrackedControllerCount();
     
     /**
-     * Get the tracked controller (for example an hand controllers) that is attached to the VR system.
+     * Get a tracked controller (for example, a hand controller) that is attached to the VR system.
      * @param index the index of the controller.
-     * @return the tracked controller (for example an hand controllers) that is attached to the VR system.
+     * @return the tracked controller (for example, a hand controller) that is attached to the VR system.
      * @see #getTrackedControllerCount()
      */
     public VRTrackedController getTrackedController(int index);
@@ -189,7 +189,7 @@ public interface VRInputAPI {
     public Vector3f getFinalObserverPosition(int index);
     
     /**
-     * Trigger an haptic pulse on the selected controller for the duration given in parameters (in seconds).
+     * Trigger a haptic pulse on the selected controller for the duration given in parameters (in seconds).
      * @param controllerIndex the index of the controller.
      * @param seconds the duration of the pulse in seconds.
      */

jme3-vr/src/main/java/com/jme3/input/vr/openvr/OpenVRInput.java

@@ -486,7 +486,7 @@ public class OpenVRInput implements VRInputAPI {
         			}
         			trackedControllers.add(new OpenVRTrackedController(i, this, controllerName, manufacturerName, environment));
         			
-        			// Send an Haptic pulse to the controller
+        			// Send a Haptic pulse to the controller
         			triggerHapticPulse(controllerCount, 1.0f);
         			
         			controllerCount++;