Processing 中制作游戏的问题 "Falling Blocks"

Question

所以我正在制作一个关于 Processing 的游戏，我似乎无法找到如何制作这个 if 语句条件。当我的圈子碰到一个块时，该条件应该扣除一条生命我有这个想法，但我不能把它写成代码，请帮助我。 “如果”条件在下方，完整的游戏代码紧随其后。

void difficulty()
      {
        if(/*what do i write here*/){
        lives--;    
      }
      else{
       fill(0, 255, 0); 
      }
      }

///////主要游戏代码从这里开始////////

int score;
    int score1;
    int miss;
    int lives=10;
    int ballx, bally;
     
    class Rect
    {
      float x;
      float y;
      float speed;
      float leng;
      color c;
      boolean valid;
     
      final int MAX_COLOR = 255;
      final int MIN_X = 50, MAX_X = 750;
      final int MIN_Y = -800, MAX_Y = -100;
      int MIN_SPEED = 1, MAX_SPEED = 2;
      final int MIN_Leng = 50, MAX_Leng =100 ;
     
      Rect()
      {
        initAll();
      }
     
      void initAll() {
        valid = true;
        c     = color(random(255), random(255), random(255));
        x     = random(MIN_X, MAX_X); 
        y     = random(MIN_Y, MAX_Y);
        speed = random(MIN_SPEED, MAX_SPEED);
        leng  = random(MIN_Leng, MAX_Leng);
      }
     
     
      void update() {
        if (!valid) {
          initAll();
          return;
        }
        move();
        draw_rect();
      }
      void draw_rect()
      {
        fill(c);
        rect (x, y, leng, leng);
      }
     
     
      void move()
      {
        if (y-leng <= height)
        {
          y += speed;
        } else if (y-leng > height )
        {
          valid = false;
          miss++;
        }
      }
     
      void difficulty()
      {
        if(){
        lives--;    
      }
      else{
       fill(0, 255, 0); 
      }
      }
      void GameOver()
      {
        if (lives==0)
        {
          for (int i = 0; i < Obj.length; i++)
          {
            Obj[i] = new Rect();
          }
     
          background(0);
          textSize(50 );
          fill(255);
          text( "You Lose ", 15, 150);
          text( "Score: " + score, 15, 100);
        }
      }
     
     
      boolean isOver(int mx, int my) {
        float disX = x - mx;
        float disY = y - my;
        if (sqrt(sq(disX) + sq(disY)) < leng/2 ) {
          return true;
        } else {
          return false;
        }
      }
    }
     
     
    Rect [] Obj = new Rect [10];
     
     
    void setup() {
      size (400, 600);
      ballx=200;
      bally=300;
      for (int i = 0; i < Obj.length; i++)
      {
        Obj[i] = new Rect();
      }
    }
     
     
    void draw() {
      
      background(0);
      textSize(50);
      text( "Score: " + score, 0, 100);
      text("Lives: " + lives, 0, 50);
      ellipse(ballx,bally,20,20);
     
      for (int i = 0; i < Obj.length; i++) {
        Obj[i].update();
        Obj[i].difficulty();
        Obj[i].GameOver();
      }
      surface.setTitle(nf(frameRate, 3, 2));
    }
    
    
    
    void keyPressed(){
      
      for(Rect s : Obj){
        if ( key =='q' ){
         ballx=ballx-2;
         score++;
         score1++;
        s.valid = false;
         break;
        }
        if ( key =='e'){
         ballx=ballx+2;
         score++;
         score1++;
         s.valid = false;
         break;
        }
      }
          
    }

Answer 1

您要做的是检查玩家是否与任何矩形发生碰撞。

想一想，玩家碰撞到一个矩形意味着什么？

就是玩家的x-position要大于左边的x-position，但要小于右边的x-positon。 y-positions.

也是如此

由于您需要检查所有个矩形的位置，您应该使用for或foreach循环。

你现在可以按照我到现在为止所说的去做，它会起作用，但你也应该考虑到播放器本身的大小。如果他的 left/right 边与矩形碰撞，玩家仍然应该与矩形碰撞，而不仅仅是他的中心。播放器在技术上是一个圆形，但为了简单起见，我们将其近似为一个矩形。

boolean isColliding = false;
for(Rect r : Obj)
{
  if (ballx + 10 > r.x &&          //is the right side of the ball further right than the left side of the rectangle?
  ballx - 10 < r.x + r.leng &&     //is the left side of the ball further left than the right side of the rectangle?
                                   //if both of the above are true, the balls x-position is between the left and right side of the ball
  
  bally + 10 > r.y &&              //is the bottom of the ball further down than the top of the rectangle?
  bally - 10 < r.y + r.leng) {     //is the top of the ball further up than the bottom of the rectangle?
    isColliding = true;            //if all of the above are true, the ball is colliding with the rectangle
  }
} 
if (isColliding) {
  lives--;
} else {
  fill(0, 255, 0);
}

Processing 中制作游戏的问题 "Falling Blocks"

Problems on making the game "Falling Blocks" on Processing

java

processing

project