LoaderM3G.rar_j2me loaderm_m3g_手机加载_手机游戏加载

import javax.microedition.lcdui.*; import javax.microedition.m3g.*; public class MobileCamera { // initial x-axis rotation and position private static final float X_ANGLE = -10.0f; // degrees private static final float X_POS = 0.0f; private static final float Y_POS = 0.0f; private static final float Z_POS = 200.0f; // move back and up, rotate down // translation and rotation increments private static final float ANGLE_INCR = 10.0f; // degrees private static final float MOVE_INCR = 0.1f; // key mode constants private static final int MOVE = 0; // move left, right, fwd, back private static final int ROTATE = 1; // turn left, right, up, down private static final int FLOAT = 2; // move up, down private static final int NUM_MODES = 3; // booleans for remembering key presses private boolean upPressed = false; private boolean downPressed = false; private boolean leftPressed = false; private boolean rightPressed = false; private int keyMode = MOVE; // current key mode // for examining the camera's (x,y,z) position private Transform trans = new Transform(); private float transMat[] = new float[16]; private float xCoord, yCoord, zCoord; // for storing the camera's current x- and y- rotations private float xAngle, yAngle; // scene graph elements for the camera private Group transGroup; private Camera cam; public MobileCamera(int width, int height) // transGroup --> camera { cam = new Camera(); float aspectRatio = ((float) width) / ((float) height); cam.setPerspective(70.0f, aspectRatio, 0.1f, 50.0f); cam.postRotate(X_ANGLE, 1.0f, 0, 0); // apply x-axis rotations to camera // translation an y-axis rotation group for the model transGroup = new Group(); // no initial rotation trans.postTranslate(X_POS, Y_POS, Z_POS); transGroup.setTransform(trans); transGroup.addChild(cam); // store initial rotations xAngle = X_ANGLE; yAngle = 0.0f; } // end of MobileCamera() public Group getCameraGroup() { return transGroup; } public Camera getCamera() { return cam; } // ----- handle key presses / releases, and return details ------ public void pressedKey(int gameAction) { switch(gameAction) { case Canvas.UP: upPressed = true; break; case Canvas.DOWN: downPressed = true; break; case Canvas.LEFT: leftPressed = true; break; case Canvas.RIGHT: rightPressed = true; break; case Canvas.FIRE: keyMode = (keyMode + 1) % NUM_MODES; break; default: break; } } // end of pressedKey() public void releasedKey(int gameAction) { switch(gameAction) { case Canvas.UP: upPressed = false; break; case Canvas.DOWN: downPressed = false; break; case Canvas.LEFT: leftPressed = false; break; case Canvas.RIGHT: rightPressed = false; break; default: break; } } // end of releasedKey() public String getKeyMode() { switch(keyMode) { case MOVE: return "Select Mode: move"; case ROTATE: return "Select Mode: rotate"; case FLOAT: return "Select Mode: float"; default: return "Select Mode: ??"; } } // end of getKeyMode() public String getPosition() { storePosition(); // round coords to 2 dp float x = ((int)((xCoord+0.005)*100.0f))/100.0f; float y = ((int)((yCoord+0.005)*100.0f))/100.0f; float z = ((int)((zCoord+0.005)*100.0f))/100.0f; return "Pos: (" + x + ", " + y + ", " + z + ")"; } // end of getPosition() private void storePosition() // extract the current (x,y,z) position from transGroup { transGroup.getTransform(trans); trans.get(transMat); xCoord = transMat[3]; yCoord = transMat[7]; zCoord = transMat[11]; } // end of storePosition() public String getRotation() { return "Rot: (" + xAngle + ", " + yAngle + ", 0.0)"; } // ------------- update camera position and rotation --------------- public void update() { switch(keyMode) { case MOVE: updateMove(); break; case ROTATE: updateRotation(); break; case FLOAT: updateFloating(); break; default: break; } } // end of update() private void updateMove() { transGroup.getTransform(trans); if (upPressed) // move forward trans.postTranslate(0, 0, -MOVE_INCR); else if (downPressed) // move backwards trans.postTranslate(0, 0, MOVE_INCR); else if (leftPressed) // move to the left trans.postTranslate(-MOVE_INCR, 0, 0); else if (rightPressed) // move to the right trans.postTranslate(MOVE_INCR, 0, 0); transGroup.setTransform(trans); } // end of updateMove() private void updateRotation() { if (upPressed) { // rotate up around x-axis cam.postRotate(ANGLE_INCR, 1.0f, 0, 0); xAngle += ANGLE_INCR; } else if (downPressed) { // rotate down around x-axis cam.postRotate(-ANGLE_INCR, 1.0f, 0, 0); xAngle -= ANGLE_INCR; } else if (leftPressed) // rotate left around the y-axis yAngle += ANGLE_INCR; else if (rightPressed) // rotate right around the y-axis yAngle -= ANGLE_INCR; // angle values are modulo 360 degrees if (xAngle >= 360.0f) xAngle -= 360.0f; else if (xAngle <= -360.0f) xAngle += 360.0f; if (yAngle >= 360.0f) yAngle -= 360.0f; else if (yAngle <= -360.0f) yAngle += 360.0f; // apply the y-axis rotation to transGroup if (leftPressed || rightPressed) { storePosition(); trans.setIdentity(); trans.postTranslate(xCoord, yCoord, zCoord); trans.postRotate(yAngle, 0, 1.0f, 0); transGroup.setTransform(trans); } } // end of updateRotation() private void updateFloating() { transGroup.getTransform(trans); if (upPressed) // move up trans.postTranslate(0, MOVE_INCR, 0); else if (downPressed) // move down trans.postTranslate(0, -MOVE_INCR, 0); else if (leftPressed) // move to the left (same as updateMove()) trans.postTranslate(-MOVE_INCR, 0, 0); else if (rightPressed) // move to the right (same as updateMove()) trans.postTranslate(MOVE_INCR, 0, 0); transGroup.setTransform(trans); } // end of updateFloating() } // end of MobileCamera class