CameraNode : created a simple testCase to demonstrate how easy it is to make a camera follow a spatial using a Camera Node.

git-svn-id: https://jmonkeyengine.googlecode.com/svn/trunk@7970 75d07b2b-3a1a-0410-a2c5-0572b91ccdca

engine/src/test/jme3test/input/TestCameraNode.java

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+/*
+ * Copyright (c) 2009-2010 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 jme3test.input;
+
+import com.jme3.app.SettingsDialog;
+import com.jme3.app.SimpleApplication;
+import com.jme3.input.ChaseCamera;
+import com.jme3.input.KeyInput;
+import com.jme3.input.MouseInput;
+import com.jme3.input.controls.ActionListener;
+import com.jme3.input.controls.AnalogListener;
+import com.jme3.input.controls.KeyTrigger;
+import com.jme3.input.controls.MouseAxisTrigger;
+import com.jme3.input.controls.MouseButtonTrigger;
+import com.jme3.material.Material;
+import com.jme3.math.FastMath;
+import com.jme3.math.Quaternion;
+import com.jme3.math.Vector3f;
+import com.jme3.scene.CameraNode;
+import com.jme3.scene.Geometry;
+import com.jme3.scene.Node;
+import com.jme3.scene.control.CameraControl.ControlDirection;
+import com.jme3.scene.shape.Quad;
+import com.jme3.system.AppSettings;
+import java.awt.event.KeyEvent;
+
+public class TestCameraNode extends SimpleApplication implements AnalogListener, ActionListener {
+
+    private Geometry teaGeom;
+    private Node teaNode;
+    CameraNode camNode;
+
+    public static void main(String[] args) {
+        TestCameraNode app = new TestCameraNode();
+        AppSettings s = new AppSettings(true);
+        s.setFrameRate(100);
+        app.setSettings(s);
+        app.start();
+    }
+
+    public void simpleInitApp() {
+        // Load a teapot model
+        teaGeom = (Geometry) assetManager.loadModel("Models/Teapot/Teapot.obj");
+
+        Material mat = new Material(assetManager, "Common/MatDefs/Misc/ShowNormals.j3md");
+        teaGeom.setMaterial(mat);
+        //creating a node to attach the geometry and the camera node
+        teaNode = new Node("teaNode");
+        teaNode.attachChild(teaGeom);
+        mat = new Material(assetManager, "Common/MatDefs/Misc/Unshaded.j3md");
+        mat.setTexture("ColorMap", assetManager.loadTexture("Interface/Logo/Monkey.jpg"));
+        Geometry ground = new Geometry("ground", new Quad(50, 50));
+        ground.setLocalRotation(new Quaternion().fromAngleAxis(-FastMath.HALF_PI, Vector3f.UNIT_X));
+        ground.setLocalTranslation(-25, -1, 25);
+        ground.setMaterial(mat);
+        rootNode.attachChild(ground);
+        rootNode.attachChild(teaNode);
+
+
+        //creating the camera Node
+        camNode = new CameraNode("CamNode", cam);
+        //Setting the direction to Spatial to camera, this means the camera will copy the movements of the Node
+        camNode.setControlDir(ControlDirection.SpatialToCamera);
+        //attaching the camNode to the teaNode
+        teaNode.attachChild(camNode);
+        //setting the local translation of the cam node to move it away from the teanNode a bit
+        camNode.setLocalTranslation(new Vector3f(-10, 0, 0));
+        //setting the camNode to look at the teaNode
+        camNode.lookAt(teaNode.getLocalTranslation(), Vector3f.UNIT_Y);
+
+
+        //disabling the flyCam (don't forget that!!)
+        flyCam.setEnabled(false);
+
+        regsiterInput();
+    }
+
+    public void regsiterInput() {
+        inputManager.addMapping("moveForward", new KeyTrigger(KeyInput.KEY_W));
+        inputManager.addMapping("moveBackward", new KeyTrigger(KeyInput.KEY_S));
+        inputManager.addMapping("moveRight", new KeyTrigger(KeyInput.KEY_D));
+        inputManager.addMapping("moveLeft", new KeyTrigger(KeyInput.KEY_A));
+        inputManager.addMapping("toggleRotate", new MouseButtonTrigger(MouseInput.BUTTON_LEFT));
+        inputManager.addMapping("rotateRight", new MouseAxisTrigger(MouseInput.AXIS_X, true));
+        inputManager.addMapping("rotateLeft", new MouseAxisTrigger(MouseInput.AXIS_X, false));
+        inputManager.addListener(this, "moveForward", "moveBackward", "moveRight", "moveLeft");
+        inputManager.addListener(this, "rotateRight", "rotateLeft", "toggleRotate");
+    }
+    boolean rotate = false;
+    Vector3f direction = new Vector3f();
+
+    public void onAnalog(String name, float value, float tpf) {
+        //computing the normalized direction of the cam to move the teaNode
+        direction.set(cam.getDirection()).normalizeLocal();
+        if (name.equals("moveForward")) {
+            direction.multLocal(5 * tpf);
+            teaNode.move(direction);
+        }
+        if (name.equals("moveBackward")) {
+            direction.multLocal(-5 * tpf);
+            teaNode.move(direction);
+        }
+        if (name.equals("moveRight")) {
+            direction.crossLocal(Vector3f.UNIT_Y).multLocal(5 * tpf);
+            teaNode.move(direction);
+        }
+        if (name.equals("moveLeft")) {
+            direction.crossLocal(Vector3f.UNIT_Y).multLocal(-5 * tpf);
+            teaNode.move(direction);
+        }
+        if (name.equals("rotateRight") && rotate) {
+            teaNode.rotate(0, 5 * tpf, 0);
+        }
+        if (name.equals("rotateLeft") && rotate) {
+            teaNode.rotate(0, -5 * tpf, 0);
+        }
+
+    }
+
+    public void onAction(String name, boolean keyPressed, float tpf) {
+        //toggling rotation on or off
+        if (name.equals("toggleRotate") && keyPressed) {
+            rotate = true;
+            inputManager.setCursorVisible(false);
+        }
+        if (name.equals("toggleRotate") && !keyPressed) {
+            rotate = false;
+            inputManager.setCursorVisible(true);
+        }
+
+    }
+}