如何让播放器和世界同时滚动？ 因为不管我做什么总是有一点延迟...... 我的观点是：我的游戏是2d sidescroller（terraria / minecraft / rpg）游戏，我需要能够将地形与世界一起移动...
Player.java
package game.test.src;
import java.awt.Color;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Rectangle;
import java.awt.event.MouseEvent;
import javax.swing.ImageIcon;
public class Player {
static final int MOVE_UP = 0, MOVE_DOWN = 1, MOVE_LEFT= 2, MOVE_RIGHT = 3;
private World world;
private Rectangle playerRect;
private Image playerImg;
//Block Variables
private int hoverX, hoverY;
private boolean hovering = false;
protected static int xDirection;
protected static int yDirection;
private Weapon weapon;
public Player(World world){
this.world = world;
playerImg = new ImageIcon("H:/2D game test/Game test 2/src/game/test/src/images/Character.png").getImage();
playerRect = new Rectangle(50, 0, 10, 36);
weapon = new Weapon(weapon.PICKAXE);
}
private static void setXDirection(int d){
xDirection = d;
}
private static void setYDirection(int d){
yDirection = d;
}
public void update()
{
move();
checkForCollision();
}
private void checkForCollision() {
}
private void move()
{
playerRect.x += xDirection;
playerRect.y += yDirection;
gravity();
}
private void gravity()
{
for(int i=0;i<world.arrayNum; i++)
{
if(!world.isSolid[i])
{
setYDirection(1);
}
else if(world.isSolid[i] && playerRect.intersects(world.blocks[i]))
{
setYDirection(0);
}
}
}
//MotionEvents
public void mousePressed(MouseEvent e)
{
}
public void mouseReleased(MouseEvent e)
{
}
public void mouseClicked(MouseEvent e)
{
}
public void mouseMoved(MouseEvent e)
{
int x = e.getX();
int y = e.getY();
int px = playerRect.x;
int py = playerRect.y;
for(int i = 0; i < world.arrayNum; i++)
{
if(weapon.isEquipped(Weapon.PICKAXE) &&
x > world.blocks[i].x && x < world.blocks[i].x + world.blocks[i].width &&
y > world.blocks[i].x && y < world.blocks[i].y + world.blocks[i].height && world.isSolid[i] &&
(world.blocks[i].x + (world.blocks[i].width / 2) ) <= (px + playerRect.width/2) + weapon.WEAPON_RADIUS &&
(world.blocks[i].x + (world.blocks[i].width / 2) ) >= (px + playerRect.width/2) - weapon.WEAPON_RADIUS &&
(world.blocks[i].y + (world.blocks[i].height / 2) ) <= (py + playerRect.height/2) + weapon.WEAPON_RADIUS &&
(world.blocks[i].y + (world.blocks[i].height / 2) ) >= (py + playerRect.height/2) - weapon.WEAPON_RADIUS)
{
hovering = true;
hoverX = world.blocks[i].x;
hoverY = world.blocks[i].y;
break;
}
else
hovering = false;
}
}
public void mouseDragged(MouseEvent e)
{
}
public void mouseEntered(MouseEvent e)
{
}
public void mouseExited(MouseEvent e)
{
}
//Drawing Methods
public void draw(Graphics g)
{
g.drawImage(playerImg, playerRect.x, playerRect.y, null);
if(hovering)
drawBlockOutline(g);
}
private void drawBlockOutline(Graphics g)
{
g.setColor(Color.black);
g.drawRect(hoverX, hoverY, world.blocks[0].width,world.blocks[0].height);
}
private class Weapon
{
public static final int UNARMED = 0;
public static final int PICKAXE = 1;
public static final int GUN = 2;
public int CURRENT_WEAPON;
public int WEAPON_RADIUS;
public Weapon(int w)
{
switch(w)
{
default:
System.out.println("No weapon selected");
break;
case UNARMED:
CURRENT_WEAPON = UNARMED;
WEAPON_RADIUS = 100;
break;
case PICKAXE:
CURRENT_WEAPON = PICKAXE;
WEAPON_RADIUS = 100;
break;
case GUN:
CURRENT_WEAPON = GUN;
WEAPON_RADIUS = 100;
break;
}
}
public void selectWeapon(int w)
{
switch(w)
{
default:
System.out.println("No weapon selected");
break;
case UNARMED:
CURRENT_WEAPON = UNARMED;
WEAPON_RADIUS = 100;
break;
case PICKAXE:
CURRENT_WEAPON = PICKAXE;
WEAPON_RADIUS = 100;
break;
case GUN:
CURRENT_WEAPON = GUN;
WEAPON_RADIUS = 100;
break;
}
}
public boolean isEquipped(int w)
{
if(w == CURRENT_WEAPON)
{
return true;
}
else
return false;
}
}
public void moveMap(){
for(Rectangle r : world.blocks){
r.x += xDirection;
r.y += yDirection;
}
}
public static void stopMoveMap(){
setXDirection(0);
setYDirection(0);
}
private static void setXDirection1(int dir){
xDirection = dir;
}
private static void setYDirection1(int dir){
yDirection = dir;
}
public static void navigatePlayer(int nav){
switch(nav){
default:
System.out.println("default case entered... Doing nothing.");
break;
case MOVE_UP:
setYDirection1(-1);
break;
case MOVE_DOWN:
setYDirection1(1);
break;
case MOVE_LEFT:
setXDirection1(-1);
break;
case MOVE_RIGHT:
setXDirection1(1);
break;
}
}
}
World.java
package game.test.src;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Rectangle;
import javax.swing.ImageIcon;
public class World {
public Rectangle[] blocks;
public boolean[] isSolid;
public Image[] blockImg;
public final int arrayNum = 500;
//Block Images
public Image BLOCK_GRASS, BLOCK_DIRT, BLOCK_STONE, BLOCK_SKY;
private int x, y, xDirection, yDirection;;
//map navigation
static final int PAN_UP = 0, PAN_DOWN = 1, PAN_LEFT= 2, PAN_RIGHT = 3;
public World(){
BLOCK_GRASS = new ImageIcon("H:/2D game test/Game test 2/src/game/test/src/images/tile_grass.png").getImage();
BLOCK_DIRT = new ImageIcon("H:/2D game test/Game test 2/src/game/test/src/images/tile_dirt.png").getImage();
BLOCK_STONE = new ImageIcon("H:/2D game test/Game test 2/src/game/test/src/images/tile_stone.png").getImage();
BLOCK_SKY = new ImageIcon("H:/2D game test/Game test 2/src/game/test/src/images/tile_sky.png").getImage();
blocks = new Rectangle[500];
blockImg = new Image[500];
isSolid = new boolean[arrayNum];
loadArrays();
}
private void loadArrays(){
for(int i = 0; i < arrayNum; i++){
if(x >= 500){
x = 0;
y += 20;
}
if(i >= 0 && i < 100){
blockImg[i] = BLOCK_SKY;
isSolid[i] = false;
blocks[i] = new Rectangle(x, y, 20, 20);
}
if(i >= 100 && i < 125){
blockImg[i] = BLOCK_GRASS;
isSolid[i] = true;
blocks[i] = new Rectangle(x, y, 20, 20);
}
if(i >= 125 && i < 225){
blockImg[i] = BLOCK_DIRT;
isSolid[i] = true;
blocks[i] = new Rectangle(x, y, 20, 20);
}
if(i >= 225 && i < 500){
blockImg[i] = BLOCK_STONE;
isSolid[i] = true;
blocks[i] = new Rectangle(x, y, 20, 20);
}
x += 20;
}
}
public void draw(Graphics g){
for(int i = 0; i < arrayNum; i++){
g.drawImage(blockImg[i], blocks[i].x, blocks[i].y, null);
}
}
public void moveMap(){
for(Rectangle r : blocks){
r.x += xDirection;
r.y += yDirection;
}
}
public void stopMoveMap(){
setXDirection(0);
setYDirection(0);
}
private void setXDirection(int dir){
xDirection = dir;
}
private void setYDirection(int dir){
yDirection = dir;
}
public void navigateMap(int nav){
switch(nav){
default:
System.out.println("default case entered... Doing nothing.");
break;
case PAN_UP:
setYDirection(-1);
break;
case PAN_DOWN:
setYDirection(1);
break;
case PAN_LEFT:
setXDirection(-1);
break;
case PAN_RIGHT:
setXDirection(1);
break;
}
}
}
GamePanel.java
package game.test.src;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Image;
import java.awt.Toolkit;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.swing.JPanel;
public class GamePanel extends JPanel implements Runnable {
//Double buffering
private Image dbImage;
private Graphics dbg;
//JPanel variables
static final int GWIDTH = 500, GHEIGHT = 400;
static final Dimension gameDim = new Dimension(GWIDTH, GHEIGHT);
//Game variables
private static final int DELAYS_BEFORE_YIELD = 10;
private Thread game;
private volatile boolean running = false;
private long period = 6*1000000; //ms -> nano
//Game Objects
World world;
Player p1;
public GamePanel(){
world = new World();
p1 = new Player(world);
setPreferredSize(gameDim);
setBackground(Color.WHITE);
setFocusable(true);
requestFocus();
//Handle all key inputs from user
addKeyListener(new KeyAdapter(){
@Override
public void keyPressed(KeyEvent e){
if(e.getKeyCode() == KeyEvent.VK_LEFT){
Player.navigatePlayer(Player.MOVE_LEFT);
world.navigateMap(World.PAN_LEFT);
}
if(e.getKeyCode() == KeyEvent.VK_RIGHT){
Player.navigatePlayer(Player.MOVE_RIGHT);
world.navigateMap(World.PAN_RIGHT);
}
if(e.getKeyCode() == KeyEvent.VK_UP){
Player.navigatePlayer(Player.MOVE_UP);
world.navigateMap(World.PAN_UP);
}
if(e.getKeyCode() == KeyEvent.VK_DOWN){
Player.navigatePlayer(Player.MOVE_DOWN);
world.navigateMap(World.PAN_DOWN);
}
}
@Override
public void keyReleased(KeyEvent e){
Player.stopMoveMap();
world.stopMoveMap();
}
@Override
public void keyTyped(KeyEvent e){
}
});
addMouseListener(new MouseAdapter()
{
@Override
public void mousePressed(MouseEvent e)
{
}
@Override
public void mouseReleased(MouseEvent e)
{
}
@Override
public void mouseClicked(MouseEvent e)
{
}
});
addMouseMotionListener(new MouseAdapter()
{
public void mouseMoved(MouseEvent e)
{
p1.mouseMoved(e);
}
public void mouseDragged(MouseEvent e)
{
}
public void mouseEntered(MouseEvent e)
{
}
public void mouseExited(MouseEvent e)
{
}
});
}
public void run(){
long beforeTime, afterTime, diff, sleepTime, overSleepTime = 0;
int delays = 0;
while(running){
beforeTime = System.nanoTime();
gameUpdate();
gameRender();
paintScreen();
afterTime = System.nanoTime();
diff = afterTime - beforeTime;
sleepTime = (period - diff) - overSleepTime;
//if sleepTime is between peiod and 0, then sleep
if(sleepTime < period && sleepTime > 0)
{
try{
Thread.sleep(sleepTime/1000000L);
overSleepTime = 0;
}catch(InterruptedException ex){
Logger.getLogger(GamePanel.class.getName()).log(Level.SEVERE, "EXCEPTION");
}
}
//the diff was greater than the period
else if(diff > period)
{
overSleepTime = diff - period;
}
else if(++delays >= DELAYS_BEFORE_YIELD)
{
Thread.yield();
delays = 0;
overSleepTime = 0;
}
//the loop took less time than expected
else
{
overSleepTime = 0;
}
}
}
private void gameUpdate(){
if(running && game != null){
world.moveMap();
p1.update();
}
}
private void gameRender(){
if(dbImage == null){ // Create the buffer
dbImage = createImage(GWIDTH, GHEIGHT);
if(dbImage == null){
System.err.println("dbImage is still null!");
return;
}else{
dbg = dbImage.getGraphics();
}
}
//Clear the screen
dbg.setColor(Color.WHITE);
dbg.fillRect(0, 0, GWIDTH, GHEIGHT);
//Draw Game elements
draw(dbg);
}
/* Draw all game content in this method */
public void draw(Graphics g){
world.draw(g);
p1.draw(g);
}
private void paintScreen(){
Graphics g;
try{
g = this.getGraphics();
if(dbImage != null && g != null){
g.drawImage(dbImage, 0, 0, null);
}
Toolkit.getDefaultToolkit().sync(); //For some operating systems
g.dispose();
}catch(Exception e){
System.err.println(e);
}
}
public void addNotify(){
super.addNotify();
startGame();
}
private void startGame(){
if(game == null || !running){
game = new Thread(this);
game.start();
running = true;
}
}
public void stopGame(){
if(running){
running = false;
}
}
private void log(String s){
System.out.println(s);
}
}
感谢您的帮助！