import gg import gx import os import rand import sokol.sapp struct Tile { id int points int picname string } struct Pos { x int = -1 y int = -1 } struct ImageLabel { pos Pos dim Pos } struct TextLabel { text string pos Pos cfg gx.TextCfg } const ( window_title = 'V 2048' window_width = 562 window_height = 580 points_label = TextLabel{ text: 'Points: ' pos: Pos{10, 5} cfg: gx.TextCfg{ align: .left size: 24 color: gx.rgb(0, 0, 0) } } moves_label = TextLabel{ text: 'Moves: ' pos: Pos{window_width - 160, 5} cfg: gx.TextCfg{ align: .left size: 24 color: gx.rgb(0, 0, 0) } } game_over_label = TextLabel{ text: 'Game Over' pos: Pos{80, 220} cfg: gx.TextCfg{ align: .left size: 100 color: gx.rgb(0, 0, 255) } } victory_image_label = ImageLabel{ pos: Pos{80, 220} dim: Pos{430, 130} } all_tiles = [ Tile{0, 0, '1.png'}, Tile{1, 2, '2.png'}, Tile{2, 4, '4.png'}, Tile{3, 8, '8.png'}, Tile{4, 16, '16.png'}, Tile{5, 32, '32.png'}, Tile{6, 64, '64.png'}, Tile{7, 128, '128.png'}, Tile{8, 256, '256.png'}, Tile{9, 512, '512.png'}, Tile{10, 1024, '1024.png'}, Tile{11, 2048, '2048.png'}, ] ) struct TileImage { tile Tile mut: image gg.Image } struct Board { mut: field [4][4]int points int shifts int } fn new_board(sb []string) Board { mut b := Board{} for y := 0; y < 4; y++ { for x := 0; x < 4; x++ { b.field[y][x] = sb[y][x] - 64 } } return b } fn (b Board) transpose() Board { mut res := b for y := 0; y < 4; y++ { for x := 0; x < 4; x++ { res.field[y][x] = b.field[x][y] } } return res } fn (b Board) hmirror() Board { mut res := b for y := 0; y < 4; y++ { for x := 0; x < 4; x++ { res.field[y][x] = b.field[y][4 - x - 1] } } return res } struct TileLine { ypos int mut: field [5]int points int shifts int } [no_inline] fn (t TileLine) to_left() TileLine { right_border_idx := 5 mut res := t mut zeros := 0 mut nonzeros := 0 // gather meta info about the line: for x := 0; x < 4; x++ { if res.field[x] == 0 { zeros++ } else { nonzeros++ } } if nonzeros == 0 { // when all the tiles are empty, there is nothing left to do return res } if zeros > 0 { // we have some 0s, do shifts to compact them: mut remaining_zeros := zeros for x := 0; x < right_border_idx - 1; x++ { for res.field[x] == 0 && remaining_zeros > 0 { res.shifts++ for k := x; k < right_border_idx; k++ { res.field[k] = res.field[k + 1] } remaining_zeros-- } } } // At this point, the non 0 tiles are all on the left, with no empty spaces // between them. we can safely merge them, when they have the same value: for x := 0; x < right_border_idx - 1; x++ { if res.field[x] == 0 { break } if res.field[x] == res.field[x + 1] { for k := x; k < right_border_idx; k++ { res.field[k] = res.field[k + 1] } res.shifts++ res.field[x]++ res.points += all_tiles[res.field[x]].points } } return res } fn (b Board) to_left() Board { mut res := b for y := 0; y < 4; y++ { mut hline := TileLine{y} for x := 0; x < 4; x++ { hline.field[x] = b.field[y][x] } reshline := hline.to_left() res.shifts += reshline.shifts res.points += reshline.points for x := 0; x < 4; x++ { res.field[y][x] = reshline.field[x] } } return res } // enum GameState { play over victory } struct App { mut: gg &gg.Context tiles []TileImage victory_image gg.Image // board Board undo []Board atickers [4][4]int state GameState = .play moves int } fn (mut app App) new_image(imagename string) gg.Image { ipath := os.resource_abs_path(os.join_path('assets', imagename)) return app.gg.create_image(ipath) } fn (mut app App) new_tile(t Tile) TileImage { mut timage := TileImage{ tile: t } timage.image = app.new_image(t.picname) return timage } fn (mut app App) load_tiles() { for t in all_tiles { app.tiles << app.new_tile(t) } } fn (mut app App) update_tickers() { for y := 0; y < 4; y++ { for x := 0; x < 4; x++ { mut old := app.atickers[y][x] if old > 0 { old-- app.atickers[y][x] = old } } } } fn (app &App) draw() { app.draw_background() app.draw_tiles() plabel := '$points_label.text ${app.board.points:08}' mlabel := '$moves_label.text ${app.moves:5d}' app.gg.draw_text(points_label.pos.x, points_label.pos.y, plabel, points_label.cfg) app.gg.draw_text(moves_label.pos.x, moves_label.pos.y, mlabel, moves_label.cfg) if app.state == .over { app.gg.draw_text(game_over_label.pos.x, game_over_label.pos.y, game_over_label.text, game_over_label.cfg) } if app.state == .victory { app.gg.draw_image(victory_image_label.pos.x, victory_image_label.pos.y, victory_image_label.dim.x, victory_image_label.dim.y, app.victory_image) } } fn (app &App) draw_background() { tw, th := 128, 128 for y := 30; y <= window_height; y+=tw { for x := 0; x <= window_width; x+=th { app.gg.draw_image(x, y, tw, th, app.tiles[0].image) } } } fn (app &App) draw_tiles() { border := 10 xstart := 10 ystart := 30 tsize := 128 for y := 0; y < 4; y++ { for x := 0; x < 4; x++ { tidx := app.board.field[y][x] if tidx == 0 { continue } tile := app.tiles[tidx] tw := tsize - 10 * app.atickers[y][x] th := tsize - 10 * app.atickers[y][x] tx := xstart + x * (tsize + border) + (tsize - tw) / 2 ty := ystart + y * (tsize + border) + (tsize - th) / 2 app.gg.draw_image(tx, ty, tw, th, tile.image) } } } fn (mut app App) new_game() { app.board = Board{} for y := 0; y < 4; y++ { for x := 0; x < 4; x++ { app.board.field[y][x] = 0 app.atickers[y][x] = 0 } } app.state = .play app.undo = [] app.moves = 0 app.new_random_tile() app.new_random_tile() } fn (mut app App) check_for_victory() { for y := 0; y < 4; y++ { for x := 0; x < 4; x++ { fidx := app.board.field[y][x] if fidx == 11 { app.victory() return } } } } fn (mut app App) check_for_game_over() { mut zeros := 0 mut remaining_merges := 0 for y := 0; y < 4; y++ { for x := 0; x < 4; x++ { fidx := app.board.field[y][x] if fidx == 0 { zeros++ continue } if x > 0 && fidx == app.board.field[y][x - 1] { remaining_merges++ } if x < 4 - 1 && fidx == app.board.field[y][x + 1] { remaining_merges++ } if y > 0 && fidx == app.board.field[y - 1][x] { remaining_merges++ } if y < 4 - 1 && fidx == app.board.field[y + 1][x] { remaining_merges++ } } } if remaining_merges == 0 && zeros == 0 { app.game_over() } } fn (mut app App) new_random_tile() { mut etiles := [16]Pos{} mut empty_tiles_max := 0 for y := 0; y < 4; y++ { for x := 0; x < 4; x++ { fidx := app.board.field[y][x] if fidx == 0 { etiles[empty_tiles_max] = Pos{x, y} empty_tiles_max++ } } } if empty_tiles_max > 0 { new_random_tile_index := rand.intn(empty_tiles_max) empty_pos := etiles[new_random_tile_index] random_value := 1 + rand.intn(2) app.board.field[empty_pos.y][empty_pos.x] = random_value app.atickers[empty_pos.y][empty_pos.x] = 30 } app.check_for_victory() app.check_for_game_over() } fn (mut app App) victory() { app.state = .victory } fn (mut app App) game_over() { app.state = .over } type BoardMoveFN fn(b Board) Board fn (mut app App) move(move_fn BoardMoveFN) { old := app.board new := move_fn(old) if old.shifts != new.shifts { app.moves++ app.board = new app.undo << old app.new_random_tile() } } fn (mut app App) on_key_down(key sapp.KeyCode) { // these keys are independent from the game state: match key { .escape { exit(0) } .n { app.new_game() } //.t {/* fast setup for a victory situation: */ app.board = new_board(['JJ@@', '@@@@', '@@@@', '@@@@'])} .backspace { if app.undo.len > 0 { app.state = .play app.board = app.undo.pop() app.moves-- return } } else {} } if app.state == .play { match key { .up, .w { app.move(fn (b Board) Board { return b.transpose().to_left().transpose() }) } .left, .a { app.move(fn (b Board) Board { return b.to_left() }) } .down, .s { app.move(fn (b Board) Board { return b.transpose().hmirror().to_left().hmirror().transpose() }) } .right, .d { app.move(fn (b Board) Board { return b.hmirror().to_left().hmirror() }) } else {} } } } // fn on_event(e &sapp.Event, mut app App) { if e.typ == .key_down { app.on_key_down(e.key_code) } } fn frame(mut app App) { app.update_tickers() app.gg.begin() app.draw() app.gg.end() } fn main() { mut app := &App{ gg: 0 state: .play } app.new_game() app.gg = gg.new_context({ bg_color: gx.white width: window_width height: window_height use_ortho: true create_window: true window_title: window_title frame_fn: frame event_fn: on_event user_data: app font_path: os.resource_abs_path('../assets/fonts/RobotoMono-Regular.ttf') }) app.load_tiles() app.victory_image = app.new_image('victory.png') app.gg.run() }