Javafx 如何通过 tilePane 移动对象

Javafx How move objects through tilePane

我有一个 tilePanes 网格,其中对象(动物)作为图像随机放置在上面。在它们真正移动之前,我需要找到一种方法来检查那个特定单元格旁边的四个 slots/cells(北、南、东、西),看看里面是否有食物来源,如果是的话,移动到那个细胞。如果错误尝试下一个方向,或者如果全部错误,则随机移动。

目前它们只是随机移动,如果幸运地在牢房上有食物来源,它们就会进食。这就是我目前拥有的,确实有效

private void makeAnimalsMove() {
    Random random = new Random();

    // Mark all animals that they haven't moved yet
    for (Slot[] row : slots) {
        for (Slot slot : row) { 
            for (Animal animal : slot.getAnimals()) { 
                animal.setMoved(false); 
            }
        }
    }

    // Now we move only those who needs to be moved
    for (int row = 0; row < slots.length; row++) {
        for (int column = 0; column < slots[row].length; column++) {
            final Slot slot = slots[row][column];

            for (final Animal animal : slot.getAnimals()) {
                if (animal.hasMoved()) {
                    continue;
                }

                int[][] directions = {
                    {row - 1, column}, // north
                    {row, column + 1}, // east
                    {row + 1, column}, // south
                    {row, column - 1}, // west
                };

                int[] selectedDirection = directions[random.nextInt(directions.length)];

                // Move the animal to the chosen direction if possible
                final int rowDirection = selectedDirection[0];
                final int columnDirection = selectedDirection[1];

                if (rowDirection >= 0 && rowDirection < slots.length && columnDirection >= 0 && columnDirection < slots[rowDirection].length) {
                    Platform.runLater(new Runnable() { 
                    @Override
                    public void run() { 
                        slot.removeObject(animal);
                        slots[rowDirection][columnDirection].addObject(animal);
                        }
                    });
                }

                // Decrease the animal's life
                animal.setMoved(true);
                animal.setLifeSpan(animal.getLifeSpan() - 1);
            }
        }
    }
}

'eating' 部分有一个单独的方法,如果单元格包含食物源,将调用该方法。我只是不确定如何让它在移动前检查四个单元格?

为了让我的解决方案生效,我建议您从 TilePane 切换到 GridPane

您可以轻松绘制元素网格:

GridPane grid = new GridPane();
grid.add(child, columnIndex, rowIndex);

然后检测特定单元格中是否有东西,例如使用这个助手:

private static boolean isCellOccupied(GridPane gridPane, int column, int row)
{
    return gridPane
            .getChildren()
            .stream()
            .filter(Node::isManaged)
            .anyMatch(
                    n -> Objects.equals(GridPane.getRowIndex(n), row)
                            && Objects.equals(GridPane.getColumnIndex(n),
                                    column));
}