代码如下：（jmonkey documentation 里的“节点”示例）
package jme3test.helloworld;import com.jme3.app.SimpleApplication;import com.jme3.material.Material;import com.jme3.math.ColorRGBA;import com.jme3.math.Vector3f;import com.jme3.scene.Geometry;import com.jme3.scene.Node;import com.jme3.scene.shape.Box;/** Sample 2 - How to use nodes as handles to manipulate objects in the scene. * You can rotate, translate, and scale objects by manipulating their parent nodes. * The Root Node is special: Only what is attached to the Root Node appears in the scene. */public class HelloNode extends SimpleApplication { public static void main(String[] args){ HelloNode app = new HelloNode(); app.start(); } @Override public void simpleInitApp() { /** create a blue box at coordinates (1,-1,1) */ Box box1 = new Box(1,1,1); Geometry blue = new Geometry("Box", box1); blue.setLocalTranslation(new Vector3f(1,-1,1)); Material mat1 = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md"); mat1.setColor("Color", ColorRGBA.Blue); blue.setMaterial(mat1); /** create a red box straight above the blue one at (1,3,1) */ Box box2 = new Box(1,1,1); Geometry red = new Geometry("Box", box2); red.setLocalTranslation(new Vector3f(1,3,1)); Material mat2 = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md"); mat2.setColor("Color", ColorRGBA.Red); red.setMaterial(mat2); /** Create a pivot node at (0,0,0) and attach it to the root node */ Node pivot = new Node("pivot"); rootNode.attachChild(pivot); // put this node in the scene /** Attach the two boxes to the *pivot* node. (And transitively to the root node.) */ pivot.attachChild(blue); pivot.attachChild(red); /** Rotate the pivot node: Note that both boxes have rotated! */ pivot.rotate(.4f,.4f,0f); }}
求大佬们告知，为什么我运行出来只有一个蓝色正方体，场景中看不到红色立方体呢？
package jme3test.helloworld;import com.jme3.app.SimpleApplication;import com.jme3.material.Material;import com.jme3.math.ColorRGBA;import com.jme3.math.Vector3f;import com.jme3.scene.Geometry;import com.jme3.scene.Node;import com.jme3.scene.shape.Box;/** Sample 2 - How to use nodes as handles to manipulate objects in the scene. * You can rotate, translate, and scale objects by manipulating their parent nodes. * The Root Node is special: Only what is attached to the Root Node appears in the scene. */public class HelloNode extends SimpleApplication { public static void main(String[] args){ HelloNode app = new HelloNode(); app.start(); } @Override public void simpleInitApp() { /** create a blue box at coordinates (1,-1,1) */ Box box1 = new Box(1,1,1); Geometry blue = new Geometry("Box", box1); blue.setLocalTranslation(new Vector3f(1,-1,1)); Material mat1 = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md"); mat1.setColor("Color", ColorRGBA.Blue); blue.setMaterial(mat1); /** create a red box straight above the blue one at (1,3,1) */ Box box2 = new Box(1,1,1); Geometry red = new Geometry("Box", box2); red.setLocalTranslation(new Vector3f(1,3,1)); Material mat2 = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md"); mat2.setColor("Color", ColorRGBA.Red); red.setMaterial(mat2); /** Create a pivot node at (0,0,0) and attach it to the root node */ Node pivot = new Node("pivot"); rootNode.attachChild(pivot); // put this node in the scene /** Attach the two boxes to the *pivot* node. (And transitively to the root node.) */ pivot.attachChild(blue); pivot.attachChild(red); /** Rotate the pivot node: Note that both boxes have rotated! */ pivot.rotate(.4f,.4f,0f); }}
求大佬们告知，为什么我运行出来只有一个蓝色正方体，场景中看不到红色立方体呢？
