從C++中刪除二維數組中的值

Question

void Draw() { 
int c1; 
int x = 59; 
int y = 500; 
int temp = x; 
for (int i = 0; i < 13; ++i){ 
    for (int j = 0; j < 10; ++j){ 
     x_coordinates[i][j] = x; 
     y_coordinates[i][j] = y; 

    c1 = temp_color[i][j]; 
    DrawRectangle(x, y, 65, 25, colors[c1]); 
      x += 67; 
     } 
     x = temp; 
     y -= 28; 
} 
DrawRectangle(tempx, 0, 85, 12, colors[5]); 
DrawCircle(templx, temply, 10, colors[7]); 
    } 
    // This function will be called automatically by this frequency 1000.0/FPS 
    void Animate() { 
     //if (temply < - 10) 
     //exit(1); 
     Brick_collision(); 
     glutPostRedisplay(); // Once again call the Draw member function 
    } 
    int Brick_collision(){ 
    for (int i=0; i<13; ++i){ 
     for (int j=0; j<10; ++j){ 
      if (((templx >= x_coordinates[i][j]) && (templx <= x_coordinates[i][j] + 65)) && ((temply + 5 >= y_coordinates[i][j]) && (temply + 5 <= y_coordinates[i][j] + 35 ))){ 
       vy = -vy; 

       temp_color[i][j] = 2; 
       // x_coordinates[i][j] -= 300; 
       // y_coordinates[i][j] -= 300; 
       // I HAVE USED THESE VALUES BECAUSE NOW THE BRICK WOULD BE OUTSIDE THE SCREEN AND THE BALL WILL NOT COLLIDE WITH IT AGAIN BUT THIS DOESN'T WORK. 

       return 1; 
       } 
      } 
     } 
    } 

我正在嘗試使用OpenGL製作BrickSlayer遊戲。在Draw()函數中，我繪製了遊戲的結構，即磚塊，踏板和球。現在我將這些磚的x和y座標存儲在一個二維數組中。在Animate()函數中，我調用函數Brick_collision()其中我已經應用了檢測磚的條件。當球與磚塊發生碰撞時，我使它變得不可思議，即我將它的顏色更改爲白色，並且我必須從二維陣列中移除它的座標，以便球不再檢測到它。我怎樣才能做到這一點？我用於去除座標的所有方法都沒有奏效。

Answer 1

我認爲你的「Magic Number」解決方案可以工作。只需在碰撞檢測中添加一些邏輯即可專門查找該幻數並在匹配時忽略它。 I.E .:

int Brick_collision(){ 
    for (int i=0; i<13; ++i){ 
     for (int j=0; j<10; ++j){ 
      if (((x_coordinates[i][j] != -300) && 
       (y_coordinates[i][j] != -300) && 
       (templx >= x_coordinates[i][j]) && 
       (templx <= x_coordinates[i][j] + 65)) && 
       ((temply + 5 >= y_coordinates[i][j]) && 
       (temply + 5 <= y_coordinates[i][j] + 35))){ 

       vy = -vy; 

       temp_color[i][j] = 2; 

       // x_coordinates[i][j] -= 300; 
       // y_coordinates[i][j] -= 300; 
       // I HAVE USED THESE VALUES BECAUSE NOW THE BRICK 
       // WOULD BE OUTSIDE THE SCREEN AND THE BALL WILL NOT 
       // COLLIDE WITH IT AGAIN BUT THIS DOESN'T WORK. 

祝你好運！