Update MorphTarget.java

Author: capdevon

jme3-core/src/main/java/com/jme3/scene/mesh/MorphTarget.java

@@ -1,46 +1,142 @@
+/*
+ * Copyright (c) 2009-2025 jMonkeyEngine
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ *   notice, this list of conditions and the following disclaimer.
+ *
+ * * Redistributions in binary form must reproduce the above copyright
+ *   notice, this list of conditions and the following disclaimer in the
+ *   documentation and/or other materials provided with the distribution.
+ *
+ * * Neither the name of 'jMonkeyEngine' nor the names of its contributors
+ *   may be used to endorse or promote products derived from this software
+ *   without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
+ * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
+ * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+ * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
 package com.jme3.scene.mesh;
 
-import com.jme3.export.*;
+import com.jme3.export.InputCapsule;
+import com.jme3.export.JmeExporter;
+import com.jme3.export.JmeImporter;
+import com.jme3.export.OutputCapsule;
+import com.jme3.export.Savable;
 import com.jme3.scene.VertexBuffer;
 
 import java.io.IOException;
-import java.nio.Buffer;
 import java.nio.FloatBuffer;
 import java.util.EnumMap;
 import java.util.Map;
 
+/**
+ * `MorphTarget` represents a single morph target within a `Mesh`.
+ * A morph target contains a set of `FloatBuffer` instances, each corresponding
+ * to a `VertexBuffer.Type` (e.g., `POSITION`, `NORMAL`, `TANGENT`).
+ * These buffers store the delta (difference) values that, when added to the
+ * base mesh's corresponding vertex buffers, create a deformed version of the mesh.
+ * <p>
+ * Morph targets are primarily used for skeletal animation blending, facial animation,
+ * or other mesh deformation effects. Each `MorphTarget` can optionally have a name
+ * for identification and control.
+ */
 public class MorphTarget implements Savable {
+
+    /**
+     * Stores the `FloatBuffer` instances for each `VertexBuffer.Type` that
+     * this morph target affects.
+     */
     private final EnumMap<VertexBuffer.Type, FloatBuffer> buffers = new EnumMap<>(VertexBuffer.Type.class);
-    private String name = null;
-    
+    /**
+     * An optional name for this morph target, useful for identification
+     * and targeting in animations.
+     */
+    private String name;
+
+    /**
+     * Required for jME deserialization.
+     */
     public MorphTarget() {
-        
     }
-    
+
+    /**
+     * Creates a new `MorphTarget` with the specified name.
+     *
+     * @param name The name of this morph target (can be null).
+     */
     public MorphTarget(String name) {
         this.name = name;
     }
-    
+
+    /**
+     * Sets the name of this morph target.
+     *
+     * @param name The new name for this morph target (can be null).
+     */
     public void setName(String name) {
         this.name = name;
     }
-    
+
+    /**
+     * Returns the name of this morph target.
+     *
+     * @return The name of this morph target, or null if not set.
+     */
     public String getName() {
         return name;
     }
 
+    /**
+     * Associates a `FloatBuffer` with a specific `VertexBuffer.Type` for this morph target.
+     * This buffer typically contains the delta values for the specified vertex attribute.
+     *
+     * @param type The type of vertex buffer (e.g., `POSITION`, `NORMAL`).
+     * @param buffer The `FloatBuffer` containing the delta data for the given type.
+     */
     public void setBuffer(VertexBuffer.Type type, FloatBuffer buffer) {
         buffers.put(type, buffer);
     }
 
+    /**
+     * Retrieves the `FloatBuffer` associated with a specific `VertexBuffer.Type` for this morph target.
+     *
+     * @param type The type of vertex buffer.
+     * @return The `FloatBuffer` for the given type, or null if not set.
+     */
     public FloatBuffer getBuffer(VertexBuffer.Type type) {
         return buffers.get(type);
     }
 
+    /**
+     * Returns the `EnumMap` containing all the `FloatBuffer` instances
+     * associated with their `VertexBuffer.Type` for this morph target.
+     *
+     * @return An `EnumMap` of vertex buffer types to their corresponding `FloatBuffer`s.
+     */
     public EnumMap<VertexBuffer.Type, FloatBuffer> getBuffers() {
         return buffers;
     }
 
+    /**
+     * Returns the number of `FloatBuffer`s (i.e., vertex attribute types)
+     * contained within this morph target.
+     *
+     * @return The count of buffers in this morph target.
+     */
     public int getNumBuffers() {
         return buffers.size();
     }
@@ -49,8 +145,9 @@ public int getNumBuffers() {
     public void write(JmeExporter ex) throws IOException {
         OutputCapsule oc = ex.getCapsule(this);
         for (Map.Entry<VertexBuffer.Type, FloatBuffer> entry : buffers.entrySet()) {
-            Buffer roData = entry.getValue().asReadOnlyBuffer();
-            oc.write((FloatBuffer) roData, entry.getKey().name(),null);
+            VertexBuffer.Type type = entry.getKey();
+            FloatBuffer roData = entry.getValue().asReadOnlyBuffer();
+            oc.write(roData, type.name(), null);
         }
         oc.write(name, "morphName", null);
     }
@@ -59,9 +156,9 @@ public void write(JmeExporter ex) throws IOException {
     public void read(JmeImporter im) throws IOException {
         InputCapsule ic = im.getCapsule(this);
         for (VertexBuffer.Type type : VertexBuffer.Type.values()) {
-            FloatBuffer b = ic.readFloatBuffer(type.name(), null);
-            if(b!= null){
-                setBuffer(type, b);
+            FloatBuffer fb = ic.readFloatBuffer(type.name(), null);
+            if (fb != null) {
+                setBuffer(type, fb);
             }
         }
         name = ic.readString("morphName", null);