CollisionDetectionExample.java - andengineexamples - AndEngine - Examples

Source path: hg/ src/ org/ anddev/ andengine/ examples/ CollisionDetectionExample.java

‹eef5877c2fc4

d6c91ccbed4f

package org.anddev.andengine.examples;

import javax.microedition.khronos.opengles.GL10;

import org.anddev.andengine.engine.Engine;
import org.anddev.andengine.engine.camera.Camera;
import org.anddev.andengine.engine.camera.hud.controls.AnalogOnScreenControl;
import org.anddev.andengine.engine.camera.hud.controls.AnalogOnScreenControl.IAnalogOnScreenControlListener;
import org.anddev.andengine.engine.camera.hud.controls.BaseOnScreenControl;
import org.anddev.andengine.engine.handler.IUpdateHandler;
import org.anddev.andengine.engine.handler.physics.PhysicsHandler;
import org.anddev.andengine.engine.options.EngineOptions;
import org.anddev.andengine.engine.options.EngineOptions.ScreenOrientation;
import org.anddev.andengine.engine.options.resolutionpolicy.RatioResolutionPolicy;
import org.anddev.andengine.entity.modifier.LoopEntityModifier;
import org.anddev.andengine.entity.modifier.ParallelEntityModifier;
import org.anddev.andengine.entity.modifier.RotationModifier;
import org.anddev.andengine.entity.modifier.ScaleModifier;
import org.anddev.andengine.entity.modifier.SequenceEntityModifier;
import org.anddev.andengine.entity.primitive.Line;
import org.anddev.andengine.entity.primitive.Rectangle;
import org.anddev.andengine.entity.scene.Scene;
import org.anddev.andengine.entity.scene.background.ColorBackground;
import org.anddev.andengine.entity.sprite.Sprite;
import org.anddev.andengine.entity.util.FPSLogger;
import org.anddev.andengine.extension.input.touch.controller.MultiTouch;
import org.anddev.andengine.extension.input.touch.controller.MultiTouchController;
import org.anddev.andengine.extension.input.touch.exception.MultiTouchException;
import org.anddev.andengine.opengl.texture.TextureOptions;
import org.anddev.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlas;
import org.anddev.andengine.opengl.texture.atlas.bitmap.BitmapTextureAtlasTextureRegionFactory;
import org.anddev.andengine.opengl.texture.region.TextureRegion;
import org.anddev.andengine.util.MathUtils;

import android.widget.Toast;

/**
 * (c) 2010 Nicolas Gramlich
 * (c) 2011 Zynga
 *
 * @author Nicolas Gramlich
 * @since 00:06:23 - 11.07.2010
 */
public class CollisionDetectionExample extends BaseExample {
	// ===========================================================
	// Constants
	// ===========================================================

	private static final int CAMERA_WIDTH = 480;
	private static final int CAMERA_HEIGHT = 320;

	// ===========================================================
	// Fields
	// ===========================================================

	private Camera mCamera;

	private BitmapTextureAtlas mBitmapTextureAtlas;
	private TextureRegion mFaceTextureRegion;

	private BitmapTextureAtlas mOnScreenControlTexture;
	private TextureRegion mOnScreenControlBaseTextureRegion;
	private TextureRegion mOnScreenControlKnobTextureRegion;

	private boolean mPlaceOnScreenControlsAtDifferentVerticalLocations = false;

	// ===========================================================
	// Constructors
	// ===========================================================

	// ===========================================================
	// Getter & Setter
	// ===========================================================

	// ===========================================================
	// Methods for/from SuperClass/Interfaces
	// ===========================================================

	@Override
	public Engine onLoadEngine() {
		this.mCamera = new Camera(0, 0, CAMERA_WIDTH, CAMERA_HEIGHT);
		final Engine engine = new Engine(new EngineOptions(true, ScreenOrientation.LANDSCAPE, new RatioResolutionPolicy(CAMERA_WIDTH, CAMERA_HEIGHT), this.mCamera));

		try {
			if(MultiTouch.isSupported(this)) {
				engine.setTouchController(new MultiTouchController());
				if(MultiTouch.isSupportedDistinct(this)) {
					Toast.makeText(this, "MultiTouch detected --> Both controls will work properly!", Toast.LENGTH_SHORT).show();
				} else {
					this.mPlaceOnScreenControlsAtDifferentVerticalLocations = true;
					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();
			}
		} catch (final MultiTouchException e) {
			Toast.makeText(this, "Sorry your Android Version does NOT support MultiTouch!\n\n(Falling back to SingleTouch.)\n\nControls are placed at different vertical locations.", Toast.LENGTH_LONG).show();
		}

		return engine;
	}

	@Override
	public void onLoadResources() {
		BitmapTextureAtlasTextureRegionFactory.setAssetBasePath("gfx/");

		this.mBitmapTextureAtlas = new BitmapTextureAtlas(32, 32, TextureOptions.BILINEAR_PREMULTIPLYALPHA);
		this.mFaceTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mBitmapTextureAtlas, this, "face_box.png", 0, 0);

		this.mOnScreenControlTexture = new BitmapTextureAtlas(256, 128, TextureOptions.BILINEAR_PREMULTIPLYALPHA);
		this.mOnScreenControlBaseTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mOnScreenControlTexture, this, "onscreen_control_base.png", 0, 0);
		this.mOnScreenControlKnobTextureRegion = BitmapTextureAtlasTextureRegionFactory.createFromAsset(this.mOnScreenControlTexture, this, "onscreen_control_knob.png", 128, 0);

		this.mEngine.getTextureManager().loadTextures(this.mBitmapTextureAtlas, this.mOnScreenControlTexture);
	}

	@Override
	public Scene onLoadScene() {
		this.mEngine.registerUpdateHandler(new FPSLogger());

		final Scene scene = new Scene();
		scene.setBackground(new ColorBackground(0.09804f, 0.6274f, 0.8784f));


		final int centerX = (CAMERA_WIDTH - this.mFaceTextureRegion.getWidth()) / 2;
		final int centerY = (CAMERA_HEIGHT - this.mFaceTextureRegion.getHeight()) / 2;

		final LoopEntityModifier entityModifier = new LoopEntityModifier(new ParallelEntityModifier(new RotationModifier(6, 0, 360), new SequenceEntityModifier(new ScaleModifier(3, 1, 1.5f), new ScaleModifier(3, 1.5f, 1))));

		/* Create A spinning rectangle and a line. */
		final Rectangle centerRectangle = new Rectangle(centerX - 50, centerY - 16, 32, 32);
		centerRectangle.registerEntityModifier(entityModifier);

		scene.attachChild(centerRectangle);
		
		final Line line = new Line(centerX + 50 - 16, centerY, centerX + 50 + 16, centerY);
		line.registerEntityModifier(entityModifier.deepCopy());
		scene.attachChild(line);

		final Sprite face = new Sprite(centerX, centerY + 42, this.mFaceTextureRegion);
		final PhysicsHandler physicsHandler = new PhysicsHandler(face);
		face.registerUpdateHandler(physicsHandler);

		scene.attachChild(face);

		/* Velocity control (left). */
		final int x1 = 0;
		final int y1 = CAMERA_HEIGHT - this.mOnScreenControlBaseTextureRegion.getHeight();
		final AnalogOnScreenControl velocityOnScreenControl = new AnalogOnScreenControl(x1, y1, this.mCamera, this.mOnScreenControlBaseTextureRegion, this.mOnScreenControlKnobTextureRegion, 0.1f, new IAnalogOnScreenControlListener() {
			@Override
			public void onControlChange(final BaseOnScreenControl pBaseOnScreenControl, final float pValueX, final float pValueY) {
				physicsHandler.setVelocity(pValueX * 100, pValueY * 100);
			}

			@Override
			public void onControlClick(final AnalogOnScreenControl pAnalogOnScreenControl) {
				/* Nothing. */
			}
		});
		velocityOnScreenControl.getControlBase().setBlendFunction(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
		velocityOnScreenControl.getControlBase().setAlpha(0.5f);

		scene.setChildScene(velocityOnScreenControl);


		/* Rotation control (right). */
		final int y2 = (this.mPlaceOnScreenControlsAtDifferentVerticalLocations) ? 0 : y1;
		final int x2 = CAMERA_WIDTH - this.mOnScreenControlBaseTextureRegion.getWidth();
		final AnalogOnScreenControl rotationOnScreenControl = new AnalogOnScreenControl(x2, y2, this.mCamera, this.mOnScreenControlBaseTextureRegion, this.mOnScreenControlKnobTextureRegion, 0.1f, new IAnalogOnScreenControlListener() {
			@Override
			public void onControlChange(final BaseOnScreenControl pBaseOnScreenControl, final float pValueX, final float pValueY) {
				if(pValueX == x1 && pValueY == x1) {
					face.setRotation(x1);
				} else {
					face.setRotation(MathUtils.radToDeg((float)Math.atan2(pValueX, -pValueY)));
				}
			}

			@Override
			public void onControlClick(final AnalogOnScreenControl pAnalogOnScreenControl) {
				/* Nothing. */
			}
		});
		rotationOnScreenControl.getControlBase().setBlendFunction(GL10.GL_SRC_ALPHA, GL10.GL_ONE_MINUS_SRC_ALPHA);
		rotationOnScreenControl.getControlBase().setAlpha(0.5f);

		velocityOnScreenControl.setChildScene(rotationOnScreenControl);

		/* The actual collision-checking. */
		scene.registerUpdateHandler(new IUpdateHandler() {
			@Override
			public void reset() { }

			@Override
			public void onUpdate(final float pSecondsElapsed) {
				if(centerRectangle.collidesWith(face)) {
					centerRectangle.setColor(1, 0, 0);
				} else {
					centerRectangle.setColor(0, 1, 0);
				}
				
				if(line.collidesWith(face)){
					line.setColor(1, 0, 0);
				} else {
					line.setColor(0, 1, 0);
				}
				
				if(!mCamera.isRectangularShapeVisible(face)) {
					centerRectangle.setColor(1, 0, 1);
				}
			}
		});

		return scene;
	}

	@Override
	public void onLoadComplete() {

	}

	// ===========================================================
	// Methods
	// ===========================================================

	// ===========================================================
	// Inner and Anonymous Classes
	// ===========================================================
}

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Change log

d6c91ccbed4f by NicolasGramlich on Aug 16, 2011 Diff

'clone()' to 'deepCopy()'.

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Older revisions

eef5877c2fc4 by Nicolas Gramlich <ngraml...@zynga.com> on Jul 27, 2011 Diff

Added copyright notice where missing.

ac7a595d9d6f by Nicolas Gramlich <ngraml...@zynga.com> on Jul 15, 2011 Diff

Merge with b5142cccd04c60b538952eb1c06
63926a938606e.

2b26f37114e5 by NicolasGramlich on Jul 14, 2011 Diff

Updated examples due to Texture
refactoring.
Added PVRTextureExample.
Damn, this should have been on the
CompressedTexture

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