Tetris/TetrisKit/GamePiece.swift

48 lines
1.1 KiB
Swift

//
// GamePiece.swift
// TetrisKit
//
// Created by Shadowfacts on 10/13/19.
// Copyright © 2019 Shadowfacts. All rights reserved.
//
import Foundation
public struct GamePiece {
public let tetromino: Tetromino
public internal(set) var topLeft: (Int, Int)
public internal(set) var tiles: [[Bool]]
public init(tetromino: Tetromino) {
self.tetromino = tetromino
self.tiles = tetromino.shape
self.topLeft = (0, 0)
}
mutating func rotate(direction: RotationDirection) {
switch direction {
case .clockwise:
self.tiles.rotateClockwise()
case .counterClockwise:
self.tiles.rotateCounterclockwise()
}
}
}
public enum RotationDirection {
case clockwise, counterClockwise
}
extension GamePiece {
public func moved(by: (Int, Int)) -> GamePiece {
var modified = self
modified.topLeft = (topLeft.0 + by.0, topLeft.1 + by.1)
return modified
}
public func rotated(_ direction: RotationDirection) -> GamePiece {
var modified = self
modified.rotate(direction: direction)
return modified
}
}