java3d 迷宫游戏

import java.util.*; import javax.microedition.lcdui.*; import javax.microedition.lcdui.game.*; import javax.microedition.m3g.*; // Main class. It setups the 3D scene and does the movements // and rendering class MazeCanvas extends GameCanvas implements Runnable { // Height of the walls private final static float WALL_HEIGHT = 10.f; // overall side of the maze private final static float MAZE_SIDE_LENGTH =200f; // amount to advance at each step private final static float STEP = 3.0f; // amount to rotate each time private final static float ANGLE_STEP = 8.0f; // millis to wait in the main loop private final static int MILLIS_PER_TICK = 5; // Size of the steps to directions x and z // stored to avoid extra trigonometric calculations private float stepz = -STEP, stepx = 0f; // player's location private float locationx = 0f, locationz = 0; // player's rotation private float angley = 0f; // flags whether we are looking the game from the top private boolean topView = false; // flags to keep the drawing going private volatile boolean playing = true; // stores the amount of frames per second being displayed private volatile float fps = 0; // stores how long has taken to run thorugh the maze private volatile long gameStart = 0; // stores how long has taken to run thorugh the maze private volatile long duration = 0; // indicates whether the game has finished private boolean finished; // Parent MIDlet private final Maze3DMIDlet midlet; // Graphics 3D global instance private Graphics3D g3d; // the world of the application private World world; // the world has 2 cameras private Camera camera, topCamera; // world's background private Background background = null; // simple rectangular mesh used to locate the player private Mesh locationSquare = null; // wall alternate appeareances private Appearance wallClearAppearance = new Appearance(); private Appearance wallAppearance = new Appearance(); // points to the mesh last made semi transparent private Mesh transparentMesh = null; private Maze maze = new Maze(10, MAZE_SIDE_LENGTH, WALL_HEIGHT); private Thread mainThread = null; // Construct the Displayable MazeCanvas(Maze3DMIDlet midlet) { super(true); this.midlet = midlet; } // (Re)Starts the game void start() { playing = true; gameStart = System.currentTimeMillis() - duration; mainThread = new Thread(this); mainThread.start(); } // stops/pauses the game void stop() { duration = System.currentTimeMillis() - gameStart; playing = false; } // switches from top view to normal view and vice versa void switchView() { topView = !topView; setView(); // informs the MIDLet since this can be switched internally midlet.viewSwitched(); } void setView() { // reset the locaiton and draw on top of the maze locationSquare.setTranslation(locationx, 2 * WALL_HEIGHT + 3f, locationz); // the square is rendered only in top view locationSquare.setRenderingEnable(topView); // the background is removed in top view world.setBackground(topView ? null : background); // sets the actual active camera if (topView) { world.setActiveCamera(topCamera); } else { world.setActiveCamera(camera); } } // Builds the world void init() { setFullScreenMode(true); duration = 0; // get a Graphics3D instance g3d = Graphics3D.getInstance(); // build the world and the cameras world = new World(); camera = new Camera(); topCamera = new Camera(); world.addChild(camera); world.addChild(topCamera); float w = (float)getWidth(); float h = (float)getHeight(); // set the perspective camera.setPerspective(60.f, w / h, 0.1f, 1000.f); topCamera.setPerspective(60.f, w / h, 0.1f, 1000.f); // the top camer has a fixed transform looking from the top Transform topCameraTransform = new Transform(); topCameraTransform.postRotate(90, -1f, 0f, 0f); topCameraTransform.postTranslate(0f, 0f,MAZE_SIDE_LENGTH); //topCameraTransform.postTranslate(0f, 0f, 1.2f * MAZE_SIDE_LENGTH); topCamera.setTransform(topCameraTransform); // Setup the background background = new Background(); Image backgroundImage = Maze3DMIDlet.makeImage("/background.png"); if (backgroundImage != null) { background.setImage(new Image2D(Image2D.RGB, backgroundImage)); background.setImageMode(Background.REPEAT, Background.REPEAT); } world.setBackground(background); createFloor(); createLocationSquare(); setUpMaze(); createStartEndMarks(); setView(); // setup the initial location locationx = maze.findStartLocationX(); locationz = maze.findStartLocationZ(); // look at the center angley = -180f; setupCamera(); start(); } // creates the labeld at the start and at the end of the maze private void createStartEndMarks() { // The marks' appearance Appearance startMarkAppearance = new Appearance(); Appearance endMarkAppearance = new Appearance(); // The composite mode is ALPHA to show only the letters // the background is hidden using the alpha layer CompositingMode markCompositeMode = new CompositingMode(); markCompositeMode.setBlending(CompositingMode.ALPHA); startMarkAppearance.setCompositingMode(markCompositeMode); endMarkAppearance.setCompositingMode(markCompositeMode); // The label's text is built using a texture Texture2D startMarkTexture = null; Image startMarkTextureImage = Maze3DMIDlet.makeImage("/start_label.png"); if (startMarkTextureImage != null) { startMarkTexture = new Texture2D( new Image2D(Image2D.RGBA, startMarkTextureImage)); // the texture is not repeated startMarkTexture.setWrapping(Texture2D.WRAP_CLAMP, Texture2D.WRAP_CLAMP); startMarkTexture.setBlending(Texture2D.FUNC_REPLACE); startMarkTexture.setFiltering(Texture2D.FILTER_NEAREST, Texture2D.FILTER_NEAREST); startMarkAppearance.setTexture(0, startMarkTexture); } Texture2D endMarkTexture = null; Image endMarkTextureImage = Maze3DMIDlet.makeImage("/end_label.png"); if (endMarkTextureImage != null) { endMarkTexture = new Texture2D( new Image2D(Image2D.RGBA, endMarkTextureImage)); // the texture is not repeated endMarkTexture.setWrapping(Texture2D.WRAP_CLAMP, Texture2D.WRAP_CLAMP); endMarkTexture.setBlending(Texture2D.FUNC_REPLACE); endMarkTexture.setFiltering(Texture2D.FILTER_NEAREST, Texture2D.FILTER_NEAREST); endMarkAppearance.setTexture(0, endMarkTexture); } // create the start mesh Plane startMarkPlane = maze.createStartMark(); Mesh startMarkMesh = startMarkPlane.createMesh(); startMarkMesh.setAppearance(0, startMarkAppearance); // these are not pickable startMarkMesh.setPickingEnable(false); world.addChild(startMarkMesh); // creates the end mesh Plane endMarkPlane = maze.createEndMark(); Mesh endMarkMesh = endMarkPlane.createMesh(); endMarkMesh.setAppearance(0, endMarkAppearance); // is not pickable either endMarkMesh.setPickingEnable(false); // Create a sequence of 4 keyframes KeyframeSequence keyframes = new KeyframeSequence(4,3, KeyframeSequence.LINEAR); keyframes.setDuration(12000); keyframes.setRepeatMode(KeyframeSequence.LOOP); float[] trans = new float[4]; endMarkM