Function asRect

app/utils/common.ts:65–101

(
  item: BulletRecord | TankRecord | EagleRecord | PowerUpRecord,
  enlargement = 0,
)

// 将BulletRecord/TankRecord/Eagle/PowerUpRecord转换为Rect类型对象
export function asRect(
  item: BulletRecord | TankRecord | EagleRecord | PowerUpRecord,
  enlargement = 0,
): Rect {
  if (item instanceof BulletRecord) {
    return {
      x: item.x - (BULLET_SIZE / 2) * enlargement,
      y: item.y - (BULLET_SIZE / 2) * enlargement,
      width: BULLET_SIZE * (1 + enlargement),
      height: BULLET_SIZE * (1 + enlargement),
    }
  } else if (item instanceof TankRecord) {
    return {
      x: item.x - (TANK_SIZE / 2) * enlargement,
      y: item.y - (TANK_SIZE / 2) * enlargement,
      width: TANK_SIZE * (1 + enlargement),
      height: TANK_SIZE * (1 + enlargement),
    }
  } else if (item instanceof EagleRecord) {
    return {
      x: item.x - (BLOCK_SIZE / 2) * enlargement,
      y: item.y - (BLOCK_SIZE / 2) * enlargement,
      width: BLOCK_SIZE * (1 + enlargement),
      height: BLOCK_SIZE * (1 + enlargement),
    }
  } else if (item instanceof PowerUpRecord) {
    DEV.ASSERT && console.assert(enlargement === -0.5)
    return {
      x: item.x - (BLOCK_SIZE / 2) * enlargement,
      y: item.y - (BLOCK_SIZE / 2) * enlargement,
      width: BLOCK_SIZE * (1 + enlargement),
      height: BLOCK_SIZE * (1 + enlargement),
    }
  } else {
    throw new Error('Cannot convert to type Rect')
  }
}

type UpdaterMaker = (amount: number) => (x: number) => number
export const inc: UpdaterMaker = amount => x => x + amount