Question

任何人都知道为什么这对我的敌人的碰撞不起作用？似乎从侧面击中时它会通过他而不是反弹。

if(new Rectangle((int) position.x, (int) position.y, size, size).intersects(
new Rectangle((int) enemy.x, (int) enemy.y, enemy.width, enemy.height))){
            if(position.y + size >= enemy.y && position.y + size <= enemy.y + (enemy.height/6))
                velo.y = -velo.y;

            else if(position.y <= enemy.y + enemy.height && position.y >= 
enemy.y + enemy.height - (enemy.height/6))
                velo.y = -velo.y;

            else
                velo.x = -velo.x;

            enemy.hp--;
        }

Answer 1

您正在使用这些职位来确定您是否来自顶层。

考虑以下图表：

 \    |    /   Assume enemy is at the center.
  \ y | y /    Assume each angle is 45°
   \  |  /     Marked x or y is what you will reverse
 x  \ | /  X
_____\|/_____  An important feature of this is that
     /|\       the Y marked areas will have a slope
 x  / | \  X   through the origin where
   /  |  \          abs(slope) > 1
  / y | y \    And the X will have the remainder
 /    |    \

我会用这样的东西：

// split these out just for code clarity hilarity
Rectangle me = new Rectangle((int) position.x, (int) position.y, size, size);
Rectangle them = new Rectangle((int) enemy.x, (int) enemy.y, enemy.width, enemy.height);
if(me.intersects(them)){
    enemy.hp--;
    // find the relative location
    double relx = enemy.x - position.x;
    double rely = enemy.y - position.y;

    // find slope of line between the two of you
    double slope = relx / rely;

    // if abs(slope) > 1, you're in y territory, otherwise, x territory
    if(Math.abs(slope) > 1.0) {
        velo.y = -velo.y;
    }
    else {
        velo.x = -velo.x;
    }
}

Answer 2

如果你的位置和敌人的y位置是相同的，而你只是向左或向右移动，那么第一个if块将是真的，你会做

velo.y = -velo.y;

但由于velo.y为0，你不会注意到它。

碰撞检测问题

2 个答案: