同時使用WASD和箭頭鍵

Question

我正在開發一個處理（在Java上運行）的雙人遊戲。一個用戶將使用WASD鍵控制他的角色，另一個用戶使用箭頭鍵控制移動。我遇到的問題是使用keyPressed時，按下箭頭時將WASD取消，反之亦然。我一直在搞這件事很長時間。有沒有人知道一個工作或注意到我做錯了什麼？

//global variables 
int wide = 600; //canvas width 
int tall = 600; //canvas height 
int s = 50; //player size 
float speed = 2.5; //player movement speed 

//colors 
int redColor = #CB4646; //player 1 color 
int blueColor = #4652CB; //player 2 color 
int backgroundColor = #DBE3B3; //background color 
float player1X = 600/3-s; //HOW COME width/3 DOESN'T WORK?????????? 
float player2X = 600*2/3; 
float playerY = 600/2-(s/2); 

//players 
Player player1 = new Player(player1X, playerY, s, speed, "wasd", redColor); //player 1 
Player player2 = new Player(player2X, playerY, s, speed, "arrows", blueColor); //player 2 

//setup 
void setup(){ 
    background(backgroundColor); 
    size(wide, tall); 
    smooth(); 
    println(player2.controls); 
} 

//draw 
void draw(){ 
    background(backgroundColor); 
    player1.usePlayer(); 
    player2.usePlayer(); 
} 

class Player{ 

    //class variables 
    float x; // x position 
    float y; // y position 
    int s; //size 
    float speed; //speed 
    String controls; //controls 
    int colors; //player color 
    char keyControls [] = new char [4]; 

    //construct 
    Player(float tempX, float tempY, int tempS , float tempSpeed, String tempControls, int tempColors){ 
    x = tempX; 
    y = tempY; 
    s = tempS; 
    speed = tempSpeed; 
    controls = tempControls; 
    colors = tempColors; 
    } 

    void usePlayer(){ 

    // draw player 
    fill(colors); 
    rect(x, y, s, s); 

    //move player 
    keyPressed(); 

    //wraparound 
    boundaries(); 

    } 

    void keyPressed(){ 

    //sets controls for wasd 
    if(controls == "wasd"){ 
      if(key == 'w' || key == 'W'){ 
      y -= speed; //move forwards 
      } 
      if(key == 's' || key == 'S'){ 
      y += speed; //move backwards 
      } 
      if(key == 'd' || key == 'D'){ 
      x += speed; //move right 
      } 
      if(key == 'a' || key == 'A'){ 
      x -= speed; //move left 
      } 
     } 

     //sets controls for arrows 
     if(controls == "arrows"){ 
     if(key == CODED){ 
      if(keyCode == UP){ 
      y -= speed; //move forwards 
      } 
      if(keyCode == DOWN){ 
      y += speed; //move backwards 
      } 
      if(keyCode == RIGHT){ 
      x += speed; //move right 
      } 
      if(keyCode == LEFT){ 
      x -= speed; //move left 
      } 
     } 
     } 
     } 

    //pacman style wraparound 
    void boundaries(){ 
    if(x == width) x = 2; 
    if(y == height) y = 2; 
    if(x == 0) x = width-s; 
    if(y == 0) y = height-s; 
    } 
} 

Answer 1

獨立跟蹤您的密鑰，不要依賴事件全局變量。

boolean[] keys = new int[255]; 

void keyPressed() { 
    keys[keyCode] = true; 
} 

void keyReleased() { 
    keys[keyCode] = false; 
} 

void draw() { 
    updatePlayers(); 
    drawStuff(); 
} 

void updatePlayers() { 
    if(keys[LEFT]) { p1.move(-1,0); } 
    if(keys[RIGHT]) { p1.move(1,0); } 
    if(keys[UP]) { p1.move(0,-1); } 
    if(keys[DOWN]) { p1.move(0,1); } 

    if(keys['a']) { p2.move(-1,0); } 
    if(keys['d']) { p2.move(1,0); } 
    if(keys['w']) { p2.move(0,-1); } 
    if(keys['s']) { p2.move(0,1); } 
} 

請注意，這必須是一系列if語句，因爲您要處理所有按下的鍵。如果某人左右舉行，p1會左移，右移。

另請注意，此示例代碼不會過濾出爲特殊鍵獲得的高於255的代碼，因此您可能希望在事件開始時放置「if（keyCode> 255）return」處理程序。

Answer 2

是key一個全局變量？我沒有看到它傳遞給玩家。如果它是全球性的，那麼它一次只能持有一把鑰匙，而不能一次控制兩名玩家。

Answer 3

這是我用來處理同時按鍵（對角移動）的Arduino/Processing代碼。它通過@Brannon解決了boolean[] cannot be cast to int[]錯誤的問題，並使用keyCodes代替密鑰。

import processing.serial.*; 
​ 
boolean[] keys = new boolean[255]; 
Serial port; 
​ 
void setup() { 
port = new Serial(this, Serial.list()[1], 9600); 
​ 
} 
​ 
void draw() { 

    // loop through boolean array and see which ones (index = keyCode) 
    // are true, then write to them. 
    for(int i = 0; i < 255; i++) { 
    if(keys[i]) { 
     if (i == 87) { port.write('w'); } 
     if (i == 65) { port.write('a'); } 
     if (i == 83) { port.write('s'); } 
     if (i == 68) { port.write('d'); } 
    } 
    } 
} 
​ 
void keyPressed() { 
    keys[keyCode] = true; 
} 
​ 
void keyReleased() { 
    keys[keyCode] = false; 
}