从C++中删除二维数组中的值

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; 
       } 
      } 
     } 
    } 

我正在尝试使用OpenGL制作BrickSlayer游戏。在Draw()函数中，我绘制了游戏的结构，即砖块，踏板和球。现在我将这些砖的x和y坐标存储在一个二维数组中。在Animate()函数中，我调用函数Brick_collision()其中我已经应用了检测砖的条件。当球与砖块发生碰撞时，我使它变得不可思议，即我将它的颜色更改为白色，并且我必须从二维阵列中移除它的坐标，以便球不再检测到它。我怎样才能做到这一点？我用于去除坐标的所有方法都没有奏效。

Answer 1

我认为你的“Magic Number”解决方案可以工作。只需在碰撞检测中添加一些逻辑即可专门查找该幻数并在匹配时忽略它。 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. 

祝你好运！