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examples: cleanup snek.v, by using math.vec, the builtin array support, instead of datatypes, and by removing casts that are no longer needed
This commit is contained in:
Delyan Angelov
parent
1ba80211c2
commit
e9a4312491
@ -1,11 +1,12 @@
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import datatypes
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import gg
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import gx
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import os
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import rand
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import time
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import math.vec { Vec2 }
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// constants
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const font = $embed_file('../assets/fonts/RobotoMono-Regular.ttf')
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const top_height = 100
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const canvas_size = 700
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const game_size = 17
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@ -14,20 +15,8 @@ const tick_rate_ms = 100
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const high_score_file_path = os.join_path(os.cache_dir(), 'v', 'examples', 'snek')
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// types
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struct Vec {
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x int
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y int
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}
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fn (a Vec) + (b Vec) Vec {
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return Vec{a.x + b.x, a.y + b.y}
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}
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fn (a Vec) - (b Vec) Vec {
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return Vec{a.x - b.x, a.y - b.y}
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}
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type HighScore = int
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type Vec = Vec2[int]
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fn (mut h HighScore) save() {
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os.mkdir_all(os.dir(high_score_file_path)) or { return }
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@ -45,7 +34,7 @@ mut:
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best HighScore
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snake []Vec
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dir Vec
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dir_queue datatypes.Queue[Vec]
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dir_queue []Vec
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food Vec
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last_tick i64
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}
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@ -53,14 +42,9 @@ mut:
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// utility
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fn (mut app App) reset_game() {
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app.score = 0
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app.snake = [
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Vec{3, 8},
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Vec{2, 8},
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Vec{1, 8},
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Vec{0, 8},
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]
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app.snake = [Vec{3, 8}, Vec{2, 8}, Vec{1, 8}, Vec{0, 8}]
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app.dir = Vec{1, 0}
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app.dir_queue = datatypes.Queue[Vec]{}
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app.dir_queue = []
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app.food = Vec{10, 8}
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app.last_tick = time.ticks()
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}
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@ -70,35 +54,12 @@ fn (mut app App) move_food() {
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x := rand.intn(game_size) or { 0 }
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y := rand.intn(game_size) or { 0 }
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app.food = Vec{x, y}
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if app.food !in app.snake {
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return
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}
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}
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}
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// events
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fn on_keydown(key gg.KeyCode, mod gg.Modifier, mut app App) {
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dir := match key {
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.w, .up {
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Vec{0, -1}
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}
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.s, .down {
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Vec{0, 1}
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}
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.a, .left {
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Vec{-1, 0}
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}
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.d, .right {
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Vec{1, 0}
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}
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else {
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return
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}
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}
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app.dir_queue.push(dir)
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}
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fn on_frame(mut app App) {
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// check if snake bit itself
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if app.snake[0] in app.snake[1..] {
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@ -110,10 +71,10 @@ fn on_frame(mut app App) {
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|| app.snake[0].y >= game_size {
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app.reset_game()
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}
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progress := f32_min(1, f32(time.ticks() - app.last_tick) / f32(tick_rate_ms))
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app.gg.begin()
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// draw everything:
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app.gg.begin()
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// draw food
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app.gg.draw_rect_filled(tile_size * app.food.x, tile_size * app.food.y + top_height,
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tile_size, tile_size, gx.red)
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@ -126,16 +87,14 @@ fn on_frame(mut app App) {
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// draw partial head
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head := app.snake[0]
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app.gg.draw_rect_filled(int(tile_size * (head.x + app.dir.x * progress)),
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int(tile_size * (head.y + app.dir.y * progress)) + top_height, tile_size, tile_size,
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gx.blue)
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app.gg.draw_rect_filled(tile_size * (head.x + app.dir.x * progress), tile_size * (head.y +
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app.dir.y * progress) + top_height, tile_size, tile_size, gx.blue)
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// draw partial tail
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tail := app.snake.last()
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tail_dir := app.snake[app.snake.len - 2] - tail
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app.gg.draw_rect_filled(int(tile_size * (tail.x + tail_dir.x * progress)),
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int(tile_size * (tail.y + tail_dir.y * progress)) + top_height, tile_size, tile_size,
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gx.blue)
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app.gg.draw_rect_filled(tile_size * (tail.x + tail_dir.x * progress), tile_size * (tail.y +
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tail_dir.y * progress) + top_height, tile_size, tile_size, gx.blue)
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// draw score bar
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app.gg.draw_rect_filled(0, 0, canvas_size, top_height, gx.black)
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@ -156,11 +115,8 @@ fn on_frame(mut app App) {
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// "snake" along
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mut prev := app.snake[0]
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app.snake[0] = app.snake[0] + app.dir
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for i in 1 .. app.snake.len {
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tmp := app.snake[i]
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app.snake[i] = prev
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prev = tmp
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app.snake[i], prev = prev, app.snake[i]
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}
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// add tail segment if food has been eaten
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@ -174,7 +130,8 @@ fn on_frame(mut app App) {
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app.move_food()
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}
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if dir := app.dir_queue.pop() {
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if app.dir_queue.len > 0 {
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dir := app.dir_queue.pop()
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if dir.x != -app.dir.x || dir.y != -app.dir.y {
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app.dir = dir
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}
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@ -186,31 +143,40 @@ fn on_frame(mut app App) {
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app.gg.end()
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}
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const font = $embed_file('../assets/fonts/RobotoMono-Regular.ttf')
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// setup
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fn main() {
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mut app := App{}
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app.reset_game()
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app.best.load()
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mut font_copy := font
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font_bytes := unsafe {
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font_copy.data().vbytes(font_copy.len)
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// events
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fn on_keydown(key gg.KeyCode, mod gg.Modifier, mut app App) {
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app.dir_queue << match key {
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.w, .up {
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Vec{0, -1}
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}
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.s, .down {
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Vec{0, 1}
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}
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.a, .left {
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Vec{-1, 0}
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}
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.d, .right {
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Vec{1, 0}
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}
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else {
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return
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}
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}
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app.gg = gg.new_context(
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bg_color: gx.white
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frame_fn: on_frame
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keydown_fn: on_keydown
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user_data: &app
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width: canvas_size
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height: top_height + canvas_size
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create_window: true
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resizable: false
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window_title: 'snek'
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font_bytes_normal: font_bytes
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)
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app.gg.run()
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}
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mut app := App{}
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app.reset_game()
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app.best.load()
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mut font_copy := font
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app.gg = gg.new_context(
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bg_color: gx.white
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frame_fn: on_frame
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keydown_fn: on_keydown
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user_data: &app
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width: canvas_size
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height: top_height + canvas_size
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window_title: 'snek'
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font_bytes_normal: unsafe { font_copy.data().vbytes(font_copy.len) }
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)
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app.gg.run()
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