I’m trying to make NPC AI for a character that a want to walk around in the quake3level. I can make the character move forward but I don’t know how to insert the intelligence that makes the character turn at a wall and follow a plan around in the level. Can you tell me a strategy for doing so?
[java]package adventure;
import java.applet.Applet;
import java.applet.AudioClip;
import java.awt.Image;
import java.io.File;
import java.net.MalformedURLException;
import java.net.URL;
import com.jme3.renderer.queue.RenderQueue.ShadowMode;
import com.jme3.animation.AnimChannel;
import com.jme3.animation.AnimControl;
import com.jme3.animation.AnimEventListener;
import com.jme3.animation.LoopMode;
import com.jme3.app.SimpleApplication;
import com.jme3.asset.BlenderKey;
import com.jme3.asset.plugins.HttpZipLocator;
import com.jme3.asset.plugins.ZipLocator;
import com.jme3.bullet.BulletAppState;
import com.jme3.bullet.PhysicsSpace;
import com.jme3.bullet.collision.shapes.CapsuleCollisionShape;
import com.jme3.bullet.control.CharacterControl;
import com.jme3.bullet.control.RigidBodyControl;
import com.jme3.bullet.objects.PhysicsCharacter;
import com.jme3.input.ChaseCamera;
import com.jme3.input.KeyInput;
import com.jme3.input.controls.ActionListener;
import com.jme3.input.controls.KeyTrigger;
import com.jme3.light.AmbientLight;
import com.jme3.light.DirectionalLight;
import com.jme3.material.MaterialList;
import com.jme3.math.ColorRGBA;
import com.jme3.math.Vector3f;
import com.jme3.post.FilterPostProcessor;
import com.jme3.post.filters.BloomFilter;
import com.jme3.scene.Geometry;
import com.jme3.scene.Node;
import com.jme3.scene.Spatial;
import com.jme3.scene.plugins.ogre.OgreMeshKey;
import com.jme3.input.controls.MouseButtonTrigger;
import com.jme3.input.MouseInput;
public class Q3World extends SimpleApplication implements ActionListener,
AnimEventListener, Playable {
private Node gameLevel;
private PhysicsCharacter player;
private static boolean useHttp = false;
private static World world;
private static Person person;
private static Player dplayer;
private BulletAppState bulletAppState;
private AnimChannel channel;
private AnimControl control;
// character
CharacterControl character;
CharacterControl goblincharacter;
Node model;
// temp vectors
Vector3f walkDirection = new Vector3f();
Spatial goblin;
RigidBodyControl terrainPhysicsNode;
// animation
AnimChannel animationChannel;
AnimChannel shootingChannel;
AnimControl animationControl;
float airTime = 0;
// camera
boolean left = false, right = false, up = false, down = false, attack=false;
ChaseCamera chaseCam;
FilterPostProcessor fpp;
private Spatial sceneModel;
private RigidBodyControl landscape;
public static void main(String[] args) {
File file = new File("quake3level.zip");
if (!file.exists()) {
useHttp = true;
}
Q3World app = new Q3World();
app.start();
}
@Override
public void simpleInitApp() {
bulletAppState = new BulletAppState();
bulletAppState.setThreadingType(BulletAppState.ThreadingType.PARALLEL);
stateManager.attach(bulletAppState);
setupKeys();
DirectionalLight dl = new DirectionalLight();
dl.setColor(ColorRGBA.White.clone().multLocal(2));
dl.setDirection(new Vector3f(-1, -1, -1).normalize());
rootNode.addLight(dl);
AmbientLight am = new AmbientLight();
am.setColor(ColorRGBA.White.mult(2));
rootNode.addLight(am);
if (useHttp) {
assetManager
.registerLocator(
"http://jmonkeyengine.googlecode.com/files/quake3level.zip",
HttpZipLocator.class);
} else {
assetManager.registerLocator("quake3level.zip", ZipLocator.class);
}
// create the geometry and attach it
MaterialList matList = (MaterialList) assetManager
.loadAsset("Scene.material");
OgreMeshKey key = new OgreMeshKey("main.meshxml", matList);
gameLevel = (Node) assetManager.loadAsset(key);
gameLevel.setLocalScale(0.1f);
gameLevel.addControl(new RigidBodyControl(0));
getPhysicsSpace().addAll(gameLevel);
rootNode.attachChild(gameLevel);
getPhysicsSpace().addAll(gameLevel);
createCharacters();
setupChaseCamera();
setupAnimationController();
setupFilter();
}
private void setupFilter() {
FilterPostProcessor fpp = new FilterPostProcessor(assetManager);
BloomFilter bloom = new BloomFilter(BloomFilter.GlowMode.Objects);
fpp.addFilter(bloom);
viewPort.addProcessor(fpp);
}
private PhysicsSpace getPhysicsSpace() {
return bulletAppState.getPhysicsSpace();
}
private void setupKeys() {
inputManager.addMapping("wireframe", new KeyTrigger(KeyInput.KEY_T));
inputManager.addListener(this, "wireframe");
inputManager.addMapping("CharLeft", new KeyTrigger(KeyInput.KEY_A));
inputManager.addMapping("CharRight", new KeyTrigger(KeyInput.KEY_D));
inputManager.addMapping("CharUp", new KeyTrigger(KeyInput.KEY_W));
inputManager.addMapping("CharDown", new KeyTrigger(KeyInput.KEY_S));
inputManager.addMapping("CharSpace",
new KeyTrigger(KeyInput.KEY_SPACE));
inputManager
.addMapping("CharShoot", new MouseButtonTrigger(MouseInput.BUTTON_LEFT));
inputManager.addListener(this, "CharLeft");
inputManager.addListener(this, "CharRight");
inputManager.addListener(this, "CharUp");
inputManager.addListener(this, "CharDown");
inputManager.addListener(this, "CharSpace");
inputManager.addListener(this, "CharShoot");
}
private void createCharacters() {
CapsuleCollisionShape capsule = new CapsuleCollisionShape(0.05f, 0.05f);
character = new CharacterControl(capsule, 2);
character.setJumpSpeed(20f);
model = (Node) assetManager.loadModel("Models/Ninja/Ninja.mesh.xml");
model.scale(0.05f, 0.05f, 0.05f);
model.addControl(character);
character.setPhysicsLocation(new Vector3f(55, 15, -60));
model.setShadowMode(ShadowMode.CastAndReceive);
character.setViewDirection(new Vector3f(1, 0, 0));
rootNode.attachChild(model);
getPhysicsSpace().add(character);
BlenderKey blenderKey = new BlenderKey("Models/Oto/Oto.mesh.xml");
Spatial man = (Spatial) assetManager.loadModel(blenderKey);
man.setLocalTranslation(new Vector3f(67, 15, -60));
man.setShadowMode(ShadowMode.CastAndReceive);
rootNode.attachChild(man);
goblin = assetManager.loadModel("objects/goblin.j3o");
goblin.scale(4f, 4f, 4f);
//goblin.setLocalTranslation(60, 3.5f, -60);
goblincharacter = new CharacterControl(capsule, 2);
goblin.addControl(goblincharacter);
goblincharacter.setPhysicsLocation(new Vector3f(60, 3.5f, -60));
//goblincharacter.setViewDirection(new Vector3f(1, 0, 0));
//character.setWalkDirection(new Vector3f(1, 0, 0));
control = goblin.getControl(AnimControl.class);
control.addListener(this);
channel = control.createChannel();
for (String anim : control.getAnimationNames())
System.out.println("goblin can:"+anim);
channel.setAnim("walk");
rootNode.attachChild(goblin);
getPhysicsSpace().add(goblincharacter);
Spatial monster = assetManager.loadModel("objects/creatures/monster/monster.packed.j3o");
monster.scale(2f, 2f, 2f);
monster.setLocalTranslation(new Vector3f(53, 3, -55));
rootNode.attachChild(monster);
}
private void setupChaseCamera() {
flyCam.setEnabled(false);
chaseCam = new ChaseCamera(cam, model, inputManager);
chaseCam.setDefaultDistance(27);
}
private void setupAnimationController() {
animationControl = model.getControl(AnimControl.class);
animationControl.addListener(this);
animationChannel = animationControl.createChannel();
//shootingChannel = animationControl.createChannel();
}
@Override
public void simpleUpdate(float tpf) {
goblincharacter.setWalkDirection(goblin.getLocalRotation().mult(Vector3f.UNIT_Z).multLocal(0.4f));
Vector3f camDir = cam.getDirection().clone().multLocal(0.1f);
Vector3f camLeft = cam.getLeft().clone().multLocal(0.1f);
camDir.y = 0;
camLeft.y = 0;
walkDirection.set(0, 0, 0);
if (left) {
walkDirection.addLocal(camLeft);
}
if (right) {
walkDirection.addLocal(camLeft.negate());
}
if (up) {
walkDirection.addLocal(camDir);
}
if (down) {
walkDirection.addLocal(camDir.negate());
}
//if (attack) {
//animationChannel.setAnim("Attack1");
//animationChannel.setLoopMode(LoopMode.DontLoop);
//}
if (!character.onGround()) {
airTime = airTime + tpf;
} else {
airTime = 0;
}
if (walkDirection.length() == 0) {
if (!"Idle1".equals(animationChannel.getAnimationName())) {
animationChannel.setAnim("Idle1", 1f);
}
} else {
character.setViewDirection(walkDirection.negate());
if (airTime > .3f) {
if (!"stand".equals(animationChannel.getAnimationName())) {
animationChannel.setAnim("Idle1");
}
} else if (!"Walk".equals(animationChannel.getAnimationName())) {
animationChannel.setAnim("Walk", 1f);
}
}
character.setWalkDirection(walkDirection);
}
/*Ninja can: Walk
Ninja can: Kick
Ninja can: JumpNoHeight
Ninja can: Jump
Ninja can: Spin
Ninja can: Attack1
Ninja can: Idle1
Ninja can: Attack3
Ninja can: Idle2
Ninja can: Attack2
Ninja can: Idle3
Ninja can: Stealth
Ninja can: Death2
Ninja can: Death1
Ninja can: HighJump
Ninja can: SideKick
Ninja can: Backflip
Ninja can: Block
Ninja can: Climb
Ninja can: Crouch*/
public void onAction(String binding, boolean value, float tpf) {
if (binding.equals("CharLeft")) {
if (value) {
left = true;
} else {
left = false;
}
} else if (binding.equals("CharRight")) {
if (value) {
right = true;
} else {
right = false;
}
} else if (binding.equals("CharUp")) {
if (value) {
up = true;
} else {
up = false;
}
} else if (binding.equals("CharDown")) {
if (value) {
down = true;
} else {
down = false;
}
} else if (binding.equals("CharSpace")) {
character.jump();
} else if (binding.equals("CharShoot") && value) {
//bulletControl();
Vector3f origin = cam.getWorldCoordinates(inputManager.getCursorPosition(), 0.0f);
Vector3f direction = cam.getWorldCoordinates(inputManager.getCursorPosition(), 0.3f);
//direction.subtractLocal(origin).normalizeLocal();
//character.setWalkDirection(location);
System.out.println("origin"+origin);
System.out.println("direction"+direction);
character.setViewDirection(direction);
animationChannel.setAnim("Attack3");
animationChannel.setLoopMode(LoopMode.DontLoop);
}
}
public void onAnimCycleDone(AnimControl control, AnimChannel channel,
String animName) {
if (channel == shootingChannel) {
channel.setAnim("Idle1");
}
}
public void onAnimChange(AnimControl control, AnimChannel channel,
String animName) {
}
// Load an image from the net, making sure it has already been
// loaded when the method returns
public Image loadPicture(String imageName) {
return null;
}
// Load and play a sound from /usr/local/hacks/sounds/
public void playSound(String name) {
URL u = null;
try {
u = new URL("file:" + "/usr/local/hacks/sounds/" + name + ".au");
} catch (MalformedURLException e) {
}
AudioClip a = Applet.newAudioClip(u);
a.play();
}
}[/java] 