AndEngine实现多点触控

最新推荐文章于 2024-05-01 17:27:00 发布

最新推荐文章于 2024-05-01 17:27:00 发布 · 78 阅读

本文介绍了一个游戏开发场景中如何设置并利用多点触控功能，包括检查设备是否支持多点触控、根据支持情况显示提示信息及调整控制布局的方法，并实现了卡片类Sprite的触摸响应逻辑。

final EngineOptions engineOptions = new EngineOptions(true, ScreenOrientation.LANDSCAPE_FIXED, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), this.mCamera);
		engineOptions.getTouchOptions().setNeedsMultiTouch(true);


		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();
		}

final Sprite sprite = new Sprite(pX, pY, this.mCardTotextureRegionMap.get(pCard), this.getVertexBufferObjectManager()) {
			boolean mGrabbed = false;


			@Override
			public boolean onAreaTouched(final TouchEvent pSceneTouchEvent, final float pTouchAreaLocalX, final float pTouchAreaLocalY) {
				switch(pSceneTouchEvent.getAction()) {
					case TouchEvent.ACTION_DOWN:
						this.setScale(1.25f);
						this.mGrabbed = true;
						break;
					case TouchEvent.ACTION_MOVE:
						if(this.mGrabbed) {
							this.setPosition(pSceneTouchEvent.getX() - Card.CARD_WIDTH / 2, pSceneTouchEvent.getY() - Card.CARD_HEIGHT / 2);
						}
						break;
					case TouchEvent.ACTION_UP:
						if(this.mGrabbed) {
							this.mGrabbed = false;
							this.setScale(1.0f);
						}
						break;
				}
				return true;
			}
		};


		this.mScene.attachChild(sprite);
		this.mScene.registerTouchArea(sprite);