How to Ensure Correct Tile Movement in the 2048 Game?

Correct Tile Movement for a 2048 Game

In the 2048 game, tiles move in the direction of the player's input. This presents a challenge in implementing tile movement correctly.

Merging Problem

The current implementation attempts to move tiles from the top-left to the bottom-right, regardless of the player's move direction. However, in 2048, tiles only merge when they move in the same direction.

Consider the following scenario:

[2][2][4][0]
[0][0][2][2]
[0][0][4][0]
[0][0][0][0]

If the player presses down, the code will merge the 2s and 4s in the bottom row, resulting in:

[0][0][0][4]
[0][0][0][0]
[0][0][4][0]
[0][0][0][0]

However, if we merge in the opposite direction (from the bottom to the top):

[0][0][0][0]
[0][0][0][0]
[0][4][4][0]
[0][0][0][0]

We correctly obtain the desired board state.

Solution

To solve this problem, scan the tiles in the opposite direction of the player's move. This ensures that tiles only merge in the desired direction.

Code Optimization

The provided code contains duplicated code for each move direction. This can be optimized by using a single loop to iterate over all tiles and a switch statement to determine the appropriate action based on the input direction.

The above is the detailed content of How to Ensure Correct Tile Movement in the 2048 Game?. For more information, please follow other related articles on the PHP Chinese website!