Collisions/zh

Minecraft 的碰撞物理非常简单：游戏没有光线追踪碰撞，而是简单地沿每个轴顺序移动玩家。

在此提醒，Minecraft的物理更新速度为每秒 20 ticks。玩家的移动和碰撞每Tick更新一次。

碰撞箱

一个碰撞箱由一个或多个边界箱组成，边界箱是由最小和最大 X/Y/Z 坐标定义的简单长方体。

碰撞通常涉及一个实体和一个方块：方块和方块之间通常不会相互碰撞。

• 玩家只有一个边界箱，尺寸为 0.6×1.8×0.6 m³。它们的位置（如F3所示）位于底部中心

• 方块有更复杂的碰撞箱（见这个列表）。

注意：判定箱'是玩家可以点击的（例如攻击实体、按下按钮、打开门）。它不一定与碰撞框重叠。

碰撞顺序

每次更新玩家速度后，游戏会执行以下步骤来检查碰撞情况：

• 沿 Y 轴移动玩家。如果在向下移动时检测到垂直碰撞，则玩家现在被认定在地面上。
• 沿 X 轴移动玩家。
• 沿 Z 轴移动玩家。
• 如果玩家在地面上撞到一堵墙并且墙的高度小于0.6米，他们可以跨过墙。
  • 参见跨步获取解释和视觉效果。
  • 该机制造成了卡角与跳跃取消，以及它们的变体。

垂直碰撞(Y)

在水平移动之前处理垂直移动。由于这个：

• The player is able to jump one tick after running off a block. In particular, this is why headhitter timing works.
• To land on a block, the player's bounding box must overlap its surface on the final tick of the jump.

When the player hits a floor or ceiling, their vertical speed is reset to 0.

Horizontal Collisions (X/Z)

Due to the X axis being processed before the Z axis, corner collisions don't behave the same depending on the direction.

This phenomenon is especially noticeable with more speed.

It's important to distinguish "X-facing" jumps from "Z-facing" ones:

• X-facing refers to jumps that point towards East/West. The corner is difficult to avoid, and the player may have to start jumping further back than expected.

• Z-facing refers to jumps that point towards North/South. The corner is easier to avoid, and in particular it's possible to do a hh-timing from the front.

The axis of a jump can be checked with F3.

Players tend to find Z-facing neos more intuitive, but X-facing neos can actually be more lenient:

• Z-facing neos are very similar to linear jumps (assuming optimal movement). To convert a neo, simply add 1.2 to its distance and increase its tier by one. For example, a triple neo is equivalent to a "4.2+0.25" (which cannot be built, but this sort of comparison is useful for analysis)
• X-facing neos don't have a linear equivalent. Compared to Z-facing neos, they are "shifted" by 1 tick (wall collision begins and ends 1 tick earlier). This shift reduces the momentum, but makes it more efficient as the player typically has more speed at the end of a jump than at the start.

Some jumps are only possible when facing one axis or the other (for example, a 2bm triple neo is only possible X-facing)

1.14+

In 1.14, the collision physics were updated. The collision order now depends on the player's velocity:

• If the player has more Z speed than X speed (in absolute value), the collision order is Y-X-Z.
• Otherwise, the collision order is Y-Z-X.

In most cases, all collisions now resemble X-facing. Some jumps which involve cutting corners may be very different compared to pre-1.14.