SurfaceScrollDetector と PinchZoomDetector を使用して、スムーズな TMX マップのスクロールとズームを実装しようとしています。
これが私のコードです:
public class TMXTiledMapExample extends SimpleBaseGameActivity implements IOnSceneTouchListener, IScrollDetectorListener, IPinchZoomDetectorListener {
private static final int CAMERA_WIDTH = 480;
private static final int CAMERA_HEIGHT = 320;
private SmoothCamera camera;
private TMXTiledMap mTMXTiledMap;
private SurfaceScrollDetector mScrollDetector;
private PinchZoomDetector mPinchZoomDetector;
private float mPinchZoomStartedCameraZoomFactor;
@Override
public EngineOptions onCreateEngineOptions() {
this.camera = new SmoothCamera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT, 400, 400, 10f);
final CroppedResolutionPolicy canvasSurface = new CroppedResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT);
EngineOptions engineOptions = new EngineOptions(true, ScreenOrientation.LANDSCAPE_FIXED, canvasSurface, this.camera);
if (MultiTouch.isSupported(this)) {
if (MultiTouch.isSupportedDistinct(this)) {
Toast.makeText(this, "MultiTouch detected --> Both controls will work properly!", Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(this, "MultiTouch detected, but your device has problems distinguishing between fingers.\n\nControls are placed at different vertical locations.", Toast.LENGTH_LONG)
.show();
}
} else {
Toast.makeText(this, "Sorry your device does NOT support MultiTouch!\n\n(Falling back to SingleTouch.)\n\nControls are placed at different vertical locations.", Toast.LENGTH_LONG).show();
}
return engineOptions;
}
@Override
public void onCreateResources() {
BitmapTextureAtlasTextureRegionFactory.setAssetBasePath("gfx/");
}
@Override
public Scene onCreateScene() {
this.mEngine.registerUpdateHandler(new FPSLogger());
final Scene scene = new Scene();
scene.setOnAreaTouchTraversalFrontToBack();
this.mScrollDetector = new SurfaceScrollDetector(this);
this.mPinchZoomDetector = new PinchZoomDetector(this);
scene.setOnSceneTouchListener(this);
scene.setTouchAreaBindingOnActionDownEnabled(true);
try {
final TMXLoader tmxLoader = new TMXLoader(this.getAssets(), this.mEngine.getTextureManager(), TextureOptions.BILINEAR, this.getVertexBufferObjectManager(),
new ITMXTilePropertiesListener() {
@Override
public void onTMXTileWithPropertiesCreated(final TMXTiledMap pTMXTiledMap, final TMXLayer pTMXLayer, final TMXTile pTMXTile,
final TMXProperties<TMXTileProperty> pTMXTileProperties) {
}
});
this.mTMXTiledMap = tmxLoader.loadFromAsset("tmx/desert2.tmx");
} catch (final TMXLoadException e) {
Debug.e(e);
}
final TMXLayer tmxLayer = this.mTMXTiledMap.getTMXLayers().get(0);
scene.attachChild(tmxLayer);
this.camera.setBounds(0, 0, tmxLayer.getHeight(), tmxLayer.getWidth());
this.camera.setBoundsEnabled(true);
return scene;
}
@Override
public void onScrollStarted(final ScrollDetector pScollDetector, final int pPointerID, final float pDistanceX, final float pDistanceY) {
final float zoomFactor = this.camera.getZoomFactor();
this.camera.offsetCenter(-pDistanceX / zoomFactor, -pDistanceY / zoomFactor);
}
@Override
public void onScroll(final ScrollDetector pScollDetector, final int pPointerID, final float pDistanceX, final float pDistanceY) {
final float zoomFactor = this.camera.getZoomFactor();
this.camera.offsetCenter(-pDistanceX / zoomFactor, -pDistanceY / zoomFactor);
}
@Override
public void onScrollFinished(final ScrollDetector pScollDetector, final int pPointerID, final float pDistanceX, final float pDistanceY) {
final float zoomFactor = this.camera.getZoomFactor();
this.camera.offsetCenter(-pDistanceX / zoomFactor, -pDistanceY / zoomFactor);
}
@Override
public void onPinchZoomStarted(final PinchZoomDetector pPinchZoomDetector, final TouchEvent pTouchEvent) {
this.mPinchZoomStartedCameraZoomFactor = this.camera.getZoomFactor();
}
@Override
public void onPinchZoom(final PinchZoomDetector pPinchZoomDetector, final TouchEvent pTouchEvent, final float pZoomFactor) {
this.camera.setZoomFactor(this.mPinchZoomStartedCameraZoomFactor * pZoomFactor);
}
@Override
public void onPinchZoomFinished(final PinchZoomDetector pPinchZoomDetector, final TouchEvent pTouchEvent, final float pZoomFactor) {
this.camera.setZoomFactor(this.mPinchZoomStartedCameraZoomFactor * pZoomFactor);
}
@Override
public boolean onSceneTouchEvent(final Scene pScene, final TouchEvent pSceneTouchEvent) {
this.mPinchZoomDetector.onTouchEvent(pSceneTouchEvent);
if (this.mPinchZoomDetector.isZooming()) {
this.mScrollDetector.setEnabled(false);
} else {
if (pSceneTouchEvent.isActionDown()) {
this.mScrollDetector.setEnabled(true);
}
this.mScrollDetector.onTouchEvent(pSceneTouchEvent);
}
return true;
}
}
このコードでのスクロールとズームはあまりスムーズではありません。問題はどこにありますか?素敵な慣性スクロールを作成するには?
ズームについてもう1つ質問です。min および max zoomfactor でどのように制限できますか? IPinchZoomDetectorListener メソッドに特別な条件を設定する必要がありますか?それとも、カメラ オブジェクトに提供されるいくつかのパラメーターで実現できますか?
また、最後の 3 つの SmoothCamera パラメータの「通常の」値は何ですか? final float pMaxVelocityX、final float pMaxVelocityY、final float pMaxZoomFactorChange ?