demogamecanvas.java

j2me的坦克大战 元代码 单机版和蓝牙联网版

                long start = System.currentTimeMillis();

                tick(g);
                input(g);
                drawBullet(g);
                long end = System.currentTimeMillis();
                int duration = (int) (end - start);
                if (duration < timeStep) {
                    try {
                        Thread.sleep(timeStep - duration);
                    } catch (InterruptedException e) {
                    }
                }
            } catch (IOException ex) {
                ex.printStackTrace();
            }
        }
    }

    public void input(Graphics g) {

        int keyState = getKeyStates();

        if ((keyState & GameCanvas.LEFT_PRESSED) != 0) {
            if (lastState != LEFT_PRESSED) {
                lastState = LEFT_PRESSED;
                tunk.setTransform(Sprite.TRANS_MIRROR_ROT90);
                bullet_x = tunk.getX();
                bullet_y = tunk.getY() + tunk.getHeight() / 2;
                i = 1;
            }
            if (tunk.getX() - step >= 0) {
                tunk.move(-step, 0);
            } else {
                tunk.setPosition(0, tunk.getY());
            }
            if (this.spriteCollides(tunk)) {
                tunk.move(step, 0);
            }
            conn.sentMessage("" + tunk.getX(), "" + tunk.getY(), "" + i, "" + 0);
        }

        if ((keyState & RIGHT_PRESSED) != 0) {
            if (lastState != RIGHT_PRESSED) {
                lastState = RIGHT_PRESSED;
                tunk.setTransform(Sprite.TRANS_ROT270);
                bullet_x = tunk.getX() + tunk.getWidth();
                bullet_y = tunk.getY() + tunk.getHeight() / 2;
                i = 2;
            }
            if (tunk.getX() + tunk.getWidth() <= getWidth()) {
                tunk.move(step, 0);
            } else {
                tunk.setPosition(getWidth() - tunk.getWidth(), tunk.getY());
            }
            if (this.spriteCollides(tunk)) {
                tunk.move(-step, 0);
            }
            conn.sentMessage("" + tunk.getX(), "" + tunk.getY(), "" + i, "" + 0);
        }

        if ((keyState & UP_PRESSED) != 0) {
            if (lastState != UP_PRESSED) {
                lastState = UP_PRESSED;
                tunk.setTransform(Sprite.TRANS_MIRROR_ROT180);
                bullet_x = tunk.getX() + tunk.getWidth() / 2;
                bullet_y = tunk.getY();
                i = 3;
            }
            if (tunk.getY() - step >= 0) {
                tunk.move(0, -step);
            } else {
                tunk.setPosition(tunk.getX(), 0);
            }
            if (this.spriteCollides(tunk)) {
                tunk.move(0, step);
            }
            conn.sentMessage("" + tunk.getX(), "" + tunk.getY(), "" + i, "" + 0);
        }

        if ((keyState & DOWN_PRESSED) != 0) {
            if (lastState != DOWN_PRESSED) {
                lastState = DOWN_PRESSED;
                tunk.setTransform(Sprite.TRANS_MIRROR);
                bullet_x = tunk.getX() + tunk.getWidth() / 2;
                bullet_y = tunk.getY() + tunk.getHeight();
                i = 4;
            }
            if (tunk.getY() + tunk.getHeight() <= getHeight()) {
                tunk.move(0, step);
            } else {
                tunk.setPosition(tunk.getX(), getHeight() - tunk.getHeight());
            }
            if (this.spriteCollides(tunk)) {
                tunk.move(0, -step);
            }
            conn.sentMessage("" + tunk.getX(), "" + tunk.getY(), "" + i, "" + 0);
        }
        if ((keyState & FIRE_PRESSED) != 0) {
            bullet = new Bullet(img);
            switch (lastState) {
                case LEFT_PRESSED:
                    //  tunk1.setTransform(Sprite.TRANS_MIRROR_ROT90);
                    bullet_x = tunk.getX();
                    bullet_y = tunk.getY() + tunk.getHeight() / 2;
                    // laststate = LEFT_PRESSED;
                    break;
                case RIGHT_PRESSED:
                    // tunk1.setTransform(Sprite.TRANS_MIRROR_ROT270);
                    bullet_x = tunk.getX() + tunk.getWidth();
                    bullet_y = tunk.getY() + tunk.getHeight() / 2;
                    // laststate = RIGHT_PRESSED;
                    break;
                case UP_PRESSED:
                    // tunk1.setTransform(Sprite.TRANS_MIRROR_ROT180);
                    bullet_x = tunk.getX() + tunk.getWidth() / 2;
                    bullet_y = tunk.getY();
                    //  laststate = UP_PRESSED;
                    break;
                case DOWN_PRESSED:
                    //tunk1.setTransform(Sprite.TRANS_MIRROR);
                    bullet_x = tunk.getX() + tunk.getWidth() / 2;
                    bullet_y = tunk.getY() + tunk.getHeight();
                    // laststate = DOWN_PRESSED;
                    break;
                }
            if (is) {
                if (bullet != null) {
                    bullet.setPosition(bullet_x, bullet_y);
                    bullet.setDirection(lastState);
                    bullet.setCanvasSize(getWidth(), getHeight());
                    bullets.addElement(bullet);
                    conn.sentMessage("" + tunk.getX(), "" + tunk.getY(), "" + i, "" + 1);
                }
                is = false;
            }
        }

        this.lm.paint(g, 0, 0);
        flushGraphics(0, 0, getWidth(), getHeight());
    }

    private void drawBullet(Graphics g) {
        for (int i = 0; i < bullets.size(); i++) {
            bullet = (Bullet) bullets.elementAt(i);
            bullet.paint(g);
        }
        for (int i = 0; i < tunkBullet.size(); i++) {
            bullet = (Bullet) tunkBullet.elementAt(i);
            bullet.paint(g);
        }
        flushGraphics();
    }

    private void tick(Graphics g) throws IOException {
        int N = 100000;
        for (int i = 0; i < bullets.size(); i++) {
            bullet = (Bullet) bullets.elementAt(i);
            bullet.tick();
            if (bullet.isLive == false) {
                bullets.removeElementAt(i);
                is = true;
                Sprite exploit = new Sprite(explode);
                // tunk.setVisible(false);
                exploit.setPosition(bullet.getX(), bullet.getY());
                exploit.paint(g);
                for (int t = 0; t < N; t++) {
                    ;
                }
                exploit.setVisible(false);
                exploit = null;
            //   tunk = null;

            }
            if (bullet.collidesWith(tunk1, true)) {
                bullets.removeElementAt(i);
                is = true;
                bullet.setVisible(false);
                exploit = new Sprite(explode);
                tunk1.setVisible(false);
                exploit.setPosition(tunk1.getRefPixelX(), tunk1.getRefPixelY());
                exploit.paint(g);
                for (int t = 0; t < N; t++) {
                    ;
                }
                exploit.setVisible(false);
                exploit = null;
                //   conn.sentMessage("" + 0, "" + 0, "" + 0, "" + 2);
                --lifeB;
                if (lifeB > 0) {
                    for (int t = 0; t < N; t++) {
                        ;
                    }
                    tunk1.setVisible(true);
                    tunk1.setPosition(firstPositionX1, firstPositionY1);
                } else {
                    isPlay = false;
                    Image l = Image.createImage("/win.png");
                    Sprite lose = new Sprite(l);
                    lose.defineReferencePixel(lose.getWidth(), lose.getHeight());
                    lose.setRefPixelPosition(getWidth() / 2, getHeight() / 2);
                    lose.paint(g);
                    flushGraphics();
                    lm.setViewWindow(0, 0, 0, 0);
                }

            }
            if (bullet.collidesWith(tree, true) || bullet.collidesWith(brutal, true)) {
                bullets.removeElementAt(i);
                is = true;
                bullet.setVisible(false);
                exploit = new Sprite(explode);
                exploit.setPosition(bullet.getX(), bullet.getY());
                exploit.paint(g);
                for (int t = 0; t < N; t++) {
                    ;
                }
                exploit.setVisible(false);
                exploit = null;
            //   conn.sentMessage("" + 0, "" + 0, "" + 0, "" + 2);
            }
        // System.out.println(bullets.size());
        }
        for (int i = 0; i < tunkBullet.size(); i++) {
            bullet = (Bullet) tunkBullet.elementAt(i);
            bullet.tick();
            if (bullet.isLive == false) {
                tunkBullet.removeElementAt(i);
                colleis = true;

                exploit = new Sprite(explode);
                // tunk.setVisible(false);
                exploit.setPosition(bullet.getX(), bullet.getY());
                exploit.paint(g);
                for (int t = 0; t < N; t++) {
                    ;
                }
                exploit.setVisible(false);
                exploit = null;
            //   tunk = null;

            }
            if (bullet.collidesWith(tunk, true)) {
                bullet.setVisible(false);
                tunkBullet.removeElementAt(i);
                colleis = true;
                exploit = new Sprite(explode);
                tunk.setVisible(false);
                exploit.setPosition(tunk.getRefPixelX(), tunk.getRefPixelY());
                exploit.paint(g);
                for (int t = 0; t < N; t++) {
                    ;
                }
                exploit.setVisible(false);
                exploit = null;
                --lifeA;
                if (lifeA > 0) {
                    for (int t = 0; t < N; t++) {
                        ;
                    }
                    tunk.setVisible(true);
                    tunk.setPosition(firstPositionX, firstPositionY);
                } else {
                    isPlay = false;
                    Image l = Image.createImage("/lose.png");
                    Sprite lose = new Sprite(l);
                    lose.defineReferencePixel(lose.getWidth(), lose.getHeight());
                    lose.setRefPixelPosition(getWidth() / 2, getHeight() / 2);
                    lose.paint(g);
                    flushGraphics();
                    lm.setViewWindow(0, 0, 0, 0);
                }
            // conn.sentMessage("" + 0, "" + 0, "" + 0, "" + 3);

            }
            if (bullet.collidesWith(tree, true) || bullet.collidesWith(brutal, true)) {
                tunkBullet.removeElementAt(i);
                colleis = true;
                bullet.setVisible(false);
                exploit = new Sprite(explode);
                exploit.setPosition(bullet.getX(), bullet.getY());
                exploit.paint(g);
                for (int t = 0; t < N; t++) {
                    ;
                }
                exploit.setVisible(false);
                exploit = null;
            //   conn.sentMessage("" + 0, "" + 0, "" + 0, "" + 2);
            }
        }
        flushGraphics();
    }

    public void commandAction(Command arg0, Displayable arg1) {
//        throw new UnsupportedOperationException("Not supported yet.");
        if (arg0 == cmdExit) {
            gameMidlet.gameMenuCanvasBack();
        }

    }
}