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examples/tetris: remove allocations by parsing tetros once

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This commit is contained in:
Alexander Medvednikov 2019-04-19 19:33:54 +02:00
parent 3c32e40d85
commit f993484e76
1 changed files with 23 additions and 7 deletions
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30
examples/tetris/tetris.v
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@ -86,6 +86,8 @@ struct Game {
field array_array_int field array_array_int
// TODO: tetro Tetro // TODO: tetro Tetro
tetro []Block tetro []Block
// TODO: tetros_cache []Tetro
tetros_cache []Block
// Index of the dropping tetromino. Refers to its color. // Index of the dropping tetromino. Refers to its color.
tetro_idx int tetro_idx int
// Index of the rotation (0-3) // Index of the rotation (0-3)
@ -96,6 +98,7 @@ struct Game {
fn main() { fn main() {
mut game := &Game{} mut game := &Game{}
game.parse_tetros()
game.init_game() game.init_game()
glfw.init() glfw.init()
mut window := glfw.create_window(glfw.WinCfg { mut window := glfw.create_window(glfw.WinCfg {
@ -143,6 +146,16 @@ fn (g mut Game) init_game() {
} }
} }
fn (g mut Game) parse_tetros() {
for i, b_tetros in B_TETROS {
for b_tetro in b_tetros {
for t in parse_binary_tetro(b_tetro) {
g.tetros_cache << t
}
}
}
}
fn (g mut Game) run() { fn (g mut Game) run() {
for { for {
g.move_tetro() g.move_tetro()
@ -177,8 +190,8 @@ fn (g mut Game) move_tetro() {
} }
fn (g mut Game) move_right(dx int) { fn (g mut Game) move_right(dx int) {
// Reached left/right edge or another tetro?
for i := 0; i < TETRO_SIZE; i++ { for i := 0; i < TETRO_SIZE; i++ {
// Reached left/right edges?
tetro := g.tetro[i] tetro := g.tetro[i]
y := tetro.y + g.pos_y y := tetro.y + g.pos_y
x := tetro.x + g.pos_x + dx x := tetro.x + g.pos_x + dx
@ -219,11 +232,16 @@ fn (g mut Game) generate_tetro() {
g.pos_y = 0 g.pos_y = 0
g.pos_x = FIELD_WIDTH / 2 - TETRO_SIZE / 2 g.pos_x = FIELD_WIDTH / 2 - TETRO_SIZE / 2
g.tetro_idx = rand.next(B_TETROS.len) g.tetro_idx = rand.next(B_TETROS.len)
g.rotation_idx = 0 g.rotation_idx = 0
b := B_TETROS[g.tetro_idx] g.get_tetro()
g.tetro = parse_binary_tetro(b[0])
} }
// Get the right tetro from cache
fn (g mut Game) get_tetro() {
idx := g.tetro_idx * TETRO_SIZE * TETRO_SIZE + g.rotation_idx * TETRO_SIZE
g.tetro = g.tetros_cache.slice(idx, idx + TETRO_SIZE)
}
fn (g mut Game) drop_tetro() { fn (g mut Game) drop_tetro() {
for i := 0; i < TETRO_SIZE; i++ { for i := 0; i < TETRO_SIZE; i++ {
tetro := g.tetro[i] tetro := g.tetro[i]
@ -304,9 +322,7 @@ fn key_down(wnd voidptr, key int, code int, action, mods int) {
if game.rotation_idx == TETRO_SIZE { if game.rotation_idx == TETRO_SIZE {
game.rotation_idx = 0 game.rotation_idx = 0
} }
t := B_TETROS[game.tetro_idx] game.get_tetro()
// game.tetro = parse_binary_tetro(B_TETROS[game.tetro_idx][game.rotation_idx])
game.tetro = parse_binary_tetro(t[game.rotation_idx])
if game.pos_x < 0 { if game.pos_x < 0 {
game.pos_x = 1 game.pos_x = 1
} }