使用浮油庫移動2D遊戲的問題

Question

由於某種原因，您只是繼續向左移動，我無法弄清楚原因。鍵盤輸入讀數不是問題，因爲向任何其他方向移動都可以很好地工作。忽略isClipped（）方法，因爲我還沒有完成它。謝謝您的幫助。

主類

package Genisis; 

import java.io.FileNotFoundException; 
import java.util.ArrayList; 

import org.lwjgl.input.Mouse; 
import org.newdawn.slick.*; 
import org.newdawn.slick.state.*; 
import org.newdawn.slick.tiled.TiledMap; 

public class Play extends BasicGameState 
{ 
int mouseX; 
int mouseY; 
Level testLevel; 
boolean[][] blocked; 

MainCharacter mc; 

public Play(int state) 
{ 

} 

public void init(GameContainer gc, StateBasedGame sbg) throws SlickException 
{ 

    gc.setMouseCursor("res/sprites/Cursor.png", 0, 0); 

    try { 
     testLevel = new Level(0, 0, "res/maps/testmap.tmx"); 
    } catch (FileNotFoundException e) { 
     System.out.println("Failed to load map."); 
     e.printStackTrace(); 
    } 

    mouseX = Mouse.getX(); 
    mouseY = gc.getHeight() - Mouse.getY(); 

    mc = new MainCharacter(50, 50, new Image("res/sprites/mcg.png")); 
} 

public void render(GameContainer gc, StateBasedGame sbg, Graphics g) throws 
                     SlickException 
{ 
    testLevel.render(mc.x, mc.y); 
    mc.render(mouseX, mouseY); 
} 

public void update(GameContainer gc, StateBasedGame sbg, int delta) throws 
                     SlickException 
{ 
    mc.move(gc, testLevel); 
    mc.render(gc.getWidth()/2, gc.getHeight()/2); 
    testLevel.render(mc.x, mc.y); 
} 

public int getID() 
{ 
    return 1; 
} 

public void spawnMC(float spwnMCX, float spwnMCY) 
{ 
    testLevel.render(spwnMCX, spwnMCY); 
    testLevel.render(spwnMCX, spwnMCY); 
} 

public void spawnOC() 
{ 
    //todo 
} 
} 

Player類

 package Genisis; 

import org.newdawn.slick.GameContainer; 
import org.newdawn.slick.Image; 
import org.newdawn.slick.Input; 
import org.newdawn.slick.SlickException; 


public class MainCharacter extends Player 
{ 

public MainCharacter(float newX, float newY, Image newSprite) throws SlickException 
{ 
    sprite = newSprite; 
    x = newX; 
    y = newY; 
} 

public void move(GameContainer gc, Level map) 
{ 
    Input in = gc.getInput(); 

    if(in.isKeyDown(Input.KEY_W)) 
     if(map.isClipped(x, y + 1)) 
      y += 1; 
    if(in.isKeyDown(Input.KEY_D)) 
     if(map.isClipped(x + 1, y)) 
      x -= 1; 
    if(in.isKeyDown(Input.KEY_S)) 
     if(map.isClipped(x, y - 1)) 
      y -= 1; 
    if(in.isKeyDown(Input.KEY_A)); 
     if(map.isClipped(x - 1, y)) 
      x += 1; 
} 

public void render(float mX, float mY) 
{ 
    float xDist = mX - (500 + (sprite.getWidth()/2)); 
    float yDist = mY - (250 + (sprite.getHeight()/2)); 

    double angleToTurn = Math.toDegrees(Math.atan2(yDist, xDist)); 
    sprite.setRotation((float)angleToTurn); 

    sprite.draw(500, 250); 
} 
} 

水平類

package Genisis; 

import org.newdawn.slick.Image; 
import org.newdawn.slick.SlickException; 
import org.newdawn.slick.SpriteSheet; 
import org.newdawn.slick.tiled.TiledMap; 

import java.io.FileNotFoundException; 
import java.io.FileReader; 
import java.util.Scanner; 

public class Level 
{ 

//height of background (in tiles) 
public int height; 

//width of background (in tiles) 
public int width; 

public boolean[][] clipped; 

public TiledMap map; 


public Level(int newHeight, int newWidth, String path) throws 
                FileNotFoundException, SlickException 
{ 
    map = new TiledMap(path); 
    clipped = new boolean[map.getHeight()][map.getWidth()]; 

    for(int i = 0; i < map.getHeight(); i++) 
     for(int j = 0; i < map.getWidth(); i++) 
     { 
      if("true".equals(map.getTileProperty(map.getTileId(i, j, 
          0), "blocked", "false"))) 
       clipped[i][j] = false; 
     } 
} 

//render map 
public void render(float mcX, float mcY) 
{ 
    map.render((int)(mcX), (int)(mcY)); 
} 

//return height of level (in pixels) 
public int getHeight() 
{ 
    return map.getHeight(); 
} 

//return width of level (in pixels) 
public int getWidth() 
{ 
    return map.getWidth(); 
} 

public boolean isClipped(float charX, float charY) 
{ 
    //return clipped[(int)(charX/50)][(int)(charY/50)]; 
     return true; 
} 
} 

Answer 1

實測值的PROBL EM。 if語句後面有一個額外的分號（它總是一個分號-_-），用於向左移動。

if(in.isKeyDown(Input.KEY_A)); 
    if(map.isClipped(x - 1, y)) 
     x += 1;