处理循环

Question

int objectX = width/2; 
int objectY = height/2; 
int snelheidY = 1; 
int score = 0; 
int richting = 1; 
int positiebal; 
int bal = ellipse(objectX, objectY, 50, 50); 
lost = false; 

void setup() { 
    size(400, 400); 
    positiebal = height/2; 
    textSize(12); 
} 

void draw() { 
    background(0, 0, 0); 
    ellipse(positiebal, objectY, 50, 50); 
    if(objectY > 375) 
     snelheidY = -snelheidY; 
    if(objectY<25) 
     snelheidY = -snelheidY; 
    objectY = objectY + snelheidY; 
    text("score = " +score,4,10); 

    if (score < 0) 
     { textSize(20); 
      text("play again",50,50); 
      noLoop(); 
      lost = true; 
      textSize = 13; 
     } 

    } 

    void mousePressed() { 
     int distance = dist(200, objectY, mouseX, mouseY); 
     if (distance<=25) 
    //score hoger maken met 1 punt 
{ score=score+1; 

    if (snelheidY < 0) 
     { snelheidY = snelheidY -1; } 
    { snelheidY = snelheidY+1; } 
} 
    // score met 1 punt lager maken 
    else 
     { score = score - 1; 

      if (snelheidY > 1) 
       { snelheidY = snelheidY -1; } 


     } 

     if (lost == true) 
      { snelheidY = 1; 
       score = 0; 
       positiebal = height/2; 
       richting = 1; 
       lost= false; 
       loop();} 

      } 

我为整个过程做了一个循环，在得分< 0之后重新启动，但第二次不起作用。它第一次工作正常，但第二次只停止游戏而没有显示重新启动文本，也没有重新启动。

Answer 1

我不会为此使用loop()和noLoop()。相反，将您的状态存储在一组变量中，并使用这些变量绘制每个帧。这里有一个简单的例子：

boolean start = true; 
boolean play = false; 
boolean end = false; 

void draw() { 

    background(0); 

    if (start) { 
    text("start", 20, 20); 
    } else if (play) { 
    text("play", 20, 20); 
    } else if (end) { 
    text("end", 20, 20); 
    } 
} 

void mousePressed() { 
    if (start) { 
    start = false; 
    play = true; 
    } else if (play) { 
    play = false; 
    end = true; 
    } else if (end) { 
    end = false; 
    start = true; 
    } 
}