嗨，我是一名新手Android游戏开发者，我使用AndEngine。我需要绘制一条路径，但是有一个问题，请看下面的图片：
看一下这张图片。我需要的路径就像第一个图，物体应该从屏幕底部移动到屏幕中间。但是当我画我的路径时，它会移动到屏幕中间，但会返回到第二个点，如第二个图所示。图片沿着路径移动，但它像第二个图那样。我需要的是第一个图。它应该在第三个点停止，并再次从第一个点开始。
以下是我的代码：
看一下这张图片。我需要的路径就像第一个图，物体应该从屏幕底部移动到屏幕中间。但是当我画我的路径时，它会移动到屏幕中间，但会返回到第二个点，如第二个图所示。图片沿着路径移动，但它像第二个图那样。我需要的是第一个图。它应该在第三个点停止，并再次从第一个点开始。以下是我的代码：
package com.example.sss;
import org.andengine.engine.camera.Camera;
import org.andengine.engine.options.EngineOptions;
import org.andengine.engine.options.ScreenOrientation;
import org.andengine.engine.options.resolutionpolicy.RatioResolutionPolicy;
import org.andengine.entity.IEntity;
import org.andengine.entity.modifier.LoopEntityModifier;
import org.andengine.entity.modifier.PathModifier;
import org.andengine.entity.modifier.PathModifier.IPathModifierListener;
import org.andengine.entity.modifier.PathModifier.Path;
import org.andengine.entity.scene.Scene;
import org.andengine.entity.scene.background.RepeatingSpriteBackground;
import org.andengine.entity.sprite.AnimatedSprite;
import org.andengine.entity.util.FPSLogger;
import org.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlas;
import org.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlasTextureRegionFactory;
import org.andengine.opengl.texture.atlas.bitmap.source.AssetBitmapTextureAtlasSource;
import org.andengine.opengl.texture.region.TiledTextureRegion;
import org.andengine.ui.activity.SimpleBaseGameActivity;
/**
* (c) 2010 Nicolas Gramlich
* (c) 2011 Zynga
*
* @author Nicolas Gramlich
* @since 13:58:48 - 19.07.2010
*/
public class MainActivity extends SimpleBaseGameActivity {
// ===========================================================
// Constants
// ===========================================================
private static final int CAMERA_WIDTH = 720;
private static final int CAMERA_HEIGHT = 480;
// ===========================================================
// Fields
// ===========================================================
private RepeatingSpriteBackground mGrassBackground;
private BitmapTextureAtlas mBitmapTextureAtlas;
private TiledTextureRegion mPlayerTextureRegion;
// ===========================================================
// Constructors
// ===========================================================
// ===========================================================
// Getter & Setter
// ===========================================================
// ===========================================================
// Methods for/from SuperClass/Interfaces
// ===========================================================
public EngineOptions onCreateEngineOptions() {
final Camera camera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT);
return new EngineOptions(true, ScreenOrientation.LANDSCAPE_FIXED, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), camera);
}
public void onCreateResources() {
BitmapTextureAtlasTextureRegionFactory.setAssetBasePath("gfx/");
this.mBitmapTextureAtlas = new BitmapTextureAtlas(this.getTextureManager(), 128, 128);
this.mPlayerTextureRegion = BitmapTextureAtlasTextureRegionFactory.createTiledFromAsset(this.mBitmapTextureAtlas, this, "player.png", 0, 0, 3, 4);
this.mGrassBackground = new RepeatingSpriteBackground(CAMERA_WIDTH, CAMERA_HEIGHT, this.getTextureManager(), AssetBitmapTextureAtlasSource.create(this.getAssets(), "gfx/background_grass.png"), this.getVertexBufferObjectManager());
this.mBitmapTextureAtlas.load();
}
public Scene onCreateScene() {
this.mEngine.registerUpdateHandler(new FPSLogger());
final Scene scene = new Scene();
final Scene scene_one = new Scene();
scene.setBackground(this.mGrassBackground);
/* Calculate the coordinates for the face, so its centered on the camera. */
final float centerX = (CAMERA_WIDTH - this.mPlayerTextureRegion.getWidth()) / 2;
final float centerY = (CAMERA_HEIGHT - this.mPlayerTextureRegion.getHeight()) / 2;
System.out.println("aaaaaa"+centerX+"asdadas");
/* Create the sprite and add it to the scene. */
final AnimatedSprite player_one = new AnimatedSprite(centerX, centerY, 48, 64, this.mPlayerTextureRegion, this.getVertexBufferObjectManager());
final Path path_one = new Path(5).to(CAMERA_WIDTH - 58, 10).to(10, 10).to(100, CAMERA_HEIGHT/2f);//to(10, 10).to(10, CAMERA_HEIGHT - 74).to(CAMERA_WIDTH - 58, CAMERA_HEIGHT - 74).to(CAMERA_WIDTH - 58, 10).to(10, 10);
final AnimatedSprite player = new AnimatedSprite(centerX, centerY, 48, 64, this.mPlayerTextureRegion, this.getVertexBufferObjectManager());
final Path path = new Path(5).to(CAMERA_WIDTH - 58, 10).to(10, 10).to(10, CAMERA_HEIGHT/2f);
player.registerEntityModifier(new LoopEntityModifier(new PathModifier(5, path, null, new IPathModifierListener() {
public void onPathStarted(final PathModifier pPathModifier, final IEntity pEntity) {
}
public void onPathWaypointStarted(final PathModifier pPathModifier, final IEntity pEntity, final int pWaypointIndex) {
switch(pWaypointIndex) {
case 0:
player.animate(new long[]{200, 200, 200}, 6, 8, true);
break;
case 1:
player.animate(new long[]{200, 200, 200}, 3, 5, true);
break;
case 2:
player.animate(new long[]{200, 200, 200}, 0, 2, true);
break;
case 3:
//scene.setVisible(false);
player.animate(new long[]{200, 200, 200}, 9, 11, true);
break;
}
}
public void onPathWaypointFinished(final PathModifier pPathModifier, final IEntity pEntity, final int pWaypointIndex) {
}
public void onPathFinished(final PathModifier pPathModifier, final IEntity pEntity) {
System.out.println("tileesdfsdfsdfgfdgdfsee"+player.getCurrentTileIndex() );
}
})));
player_one.registerEntityModifier(new LoopEntityModifier(new PathModifier(5, path_one, null, new IPathModifierListener() {
public void onPathStarted(final PathModifier pPathModifier, final IEntity pEntity) {
}
public void onPathWaypointStarted(final PathModifier pPathModifier, final IEntity pEntity, final int pWaypointIndex) {
switch(pWaypointIndex) {
case 0:
player.animate(new long[]{200, 200, 200}, 6, 8, true);
break;
case 1:
player.animate(new long[]{200, 200, 200}, 3, 5, true);
break;
case 2:
player.animate(new long[]{200, 200, 200}, 0, 2, true);
System.out.println("insideeeeeeeeeeeeeeeeeeeeeeeee");
scene.detachChild(player_one);
scene.attachChild(player);
break;
case 3:
player.animate(new long[]{200, 200, 200}, 9, 11, true);
break;
}
}
public void onPathWaypointFinished(final PathModifier pPathModifier, final IEntity pEntity, final int pWaypointIndex) {
}
public void onPathFinished(final PathModifier pPathModifier, final IEntity pEntity) {
System.out.println("tileesdfsdfsdfgfdgdfsee"+player.getCurrentTileIndex() );
}
})));
scene.attachChild(player);
return scene;
}
// ===========================================================
// Methods
// ===========================================================
// ===========================================================
// Inner and Anonymous Classes
// ===========================================================
}
请帮助我。谢谢您提前。