examples: term.ui - add a pong clone (#6857)
Larpon
GitHub
parent
ba2c5f68fc
commit
f44853a87f
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import term
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import term.ui
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import time
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enum Mode {
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menu
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game
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}
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const (
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player_one = 1 // Human control this racket
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player_two = 0 // Take over this AI controller
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white = ui.Color{255, 255, 255}
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orange = ui.Color{255, 140, 0}
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)
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struct App {
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mut:
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tui &ui.Context = 0
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mode Mode = Mode.menu
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width int
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height int
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game &Game = 0
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dt f32
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ticks i64
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}
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fn (mut a App) init() {
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a.game = &Game{
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app: a
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}
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w, h := a.tui.window_width, a.tui.window_height
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a.width = w
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a.height = h
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term.erase_del_clear()
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term.set_cursor_position({
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x: 0
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y: 0
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})
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}
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fn (mut a App) start_game() {
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if a.mode != .game {
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a.mode = .game
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}
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a.game.init()
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}
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fn (mut a App) frame() {
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ticks := time.ticks()
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a.dt = f32(ticks - a.ticks) / 1000.0
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a.width, a.height = a.tui.window_width, a.tui.window_height
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if a.mode == .game {
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a.game.update()
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}
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a.tui.clear()
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a.render()
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a.tui.flush()
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a.ticks = ticks
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}
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fn (mut a App) quit() {
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if a.mode != .menu {
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a.game.quit()
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return
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}
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term.set_cursor_position({
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x: 0
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y: 0
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})
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exit(0)
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}
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fn (mut a App) event(e &ui.Event) {
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match e.typ {
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.mouse_move {
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if a.mode != .game {
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return
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}
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// TODO mouse movement for real Pong sharks
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// a.game.move_player(player_one, 0, -1)
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}
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.key_down {
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match e.code {
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.escape, .q {
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a.quit()
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}
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.w {
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if a.mode != .game {
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return
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}
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a.game.move_player(player_one, 0, -1)
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}
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.a {
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if a.mode != .game {
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return
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}
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a.game.move_player(player_one, 0, -1)
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}
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.s {
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if a.mode != .game {
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return
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}
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a.game.move_player(player_one, 0, 1)
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}
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.d {
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if a.mode != .game {
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return
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}
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a.game.move_player(player_one, 0, 1)
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}
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.left {
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if a.mode != .game {
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return
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}
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a.game.move_player(player_two, 0, -1)
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}
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.right {
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if a.mode != .game {
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return
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}
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a.game.move_player(player_two, 0, 1)
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}
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.up {
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if a.mode != .game {
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return
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}
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a.game.move_player(player_two, 0, -1)
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}
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.down {
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if a.mode != .game {
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return
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}
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a.game.move_player(player_two, 0, 1)
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}
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.enter, .space {
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if a.mode == .menu {
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a.start_game()
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}
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}
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else {}
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}
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}
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else {}
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}
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}
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fn (mut a App) free() {
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unsafe {
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a.game.free()
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free(a.game)
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}
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}
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fn (mut a App) render() {
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match a.mode {
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.menu { a.draw_menu() }
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else { a.draw_game() }
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}
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}
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fn (mut a App) draw_menu() {
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cx := int(f32(a.width) * 0.5)
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y025 := int(f32(a.height) * 0.25)
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y075 := int(f32(a.height) * 0.75)
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cy := int(f32(a.height) * 0.5)
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//
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a.tui.set_color(white)
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a.tui.bold()
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a.tui.draw_text(cx - 2, y025, 'VONG')
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a.tui.reset()
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a.tui.draw_text(cx - 13, y025 + 1, '(A game of Pong written in V)')
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//
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a.tui.set_color(white)
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a.tui.bold()
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a.tui.draw_text(cx - 3, cy + 1, 'START')
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a.tui.reset()
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//
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a.tui.draw_text(cx - 9, y075 + 1, 'Press SPACE to start')
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a.tui.reset()
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a.tui.draw_text(cx - 5, y075 + 3, 'ESC to Quit')
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a.tui.reset()
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}
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fn (mut a App) draw_game() {
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a.game.draw()
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}
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struct Player {
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mut:
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game &Game
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pos Vec
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racket_size int = 4
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score int
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ai bool
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}
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fn (mut p Player) move(x f32, y f32) {
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p.pos.x += x
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p.pos.y += y
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}
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fn (mut p Player) update() {
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if !p.ai {
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return
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}
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if isnil(p.game) {
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return
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}
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// dt := p.game.app.dt
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ball := &p.game.ball
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// Evil AI that eventually will take over the world
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p.pos.y = ball.pos.y - int(f32(p.racket_size) * 0.5)
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}
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struct Vec {
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mut:
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x f32
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y f32
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}
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fn (mut v Vec) set(x f32, y f32) {
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v.x = x
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v.y = y
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}
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struct Ball {
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mut:
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pos Vec
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vel Vec
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acc Vec
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}
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fn (mut b Ball) update(dt f32) {
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b.pos.x += b.vel.x * b.acc.x * dt
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b.pos.y += b.vel.y * b.acc.y * dt
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}
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struct Game {
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mut:
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app &App = 0
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players []Player
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ball Ball
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}
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fn (mut g Game) move_player(id int, x int, y int) {
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mut p := &g.players[id]
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if p.ai { // disable AI when moved
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p.ai = false
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}
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p.move(x, y)
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}
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fn (mut g Game) init() {
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if g.players.len == 0 {
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g.players = []Player{len: 2, init: Player{ // <- BUG omitting the init will result in smaller racket sizes???
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game: g
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}}
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}
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g.reset()
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}
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fn (mut g Game) reset() {
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mut i := 0
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for mut p in g.players {
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p.score = 0
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if i != player_one {
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p.ai = true
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}
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i++
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}
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g.new_round()
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}
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fn (mut g Game) new_round() {
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mut i := 0
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for mut p in g.players {
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p.pos.x = if i == 0 { 3 } else { g.app.width - 2 }
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p.pos.y = f32(g.app.height) * 0.5 - f32(p.racket_size) * 0.5
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i++
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}
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g.ball.pos.set(f32(g.app.width) * 0.5, f32(g.app.height) * 0.5)
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g.ball.vel.set(-8, -15)
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g.ball.acc.set(2.0, 1.0)
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}
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fn (mut g Game) update() {
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dt := g.app.dt
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mut b := &g.ball
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for mut p in g.players {
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p.update()
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// Keep rackets within the game area
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if p.pos.y <= 0 {
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p.pos.y = 1
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}
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if p.pos.y + p.racket_size >= g.app.height {
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p.pos.y = g.app.height - p.racket_size - 1
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}
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// Check ball collision
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// Player left side
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if p.pos.x < f32(g.app.width) * 0.5 {
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// Racket collision
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if b.pos.x <= p.pos.x + 1 {
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if b.pos.y >= p.pos.y && b.pos.y <= p.pos.y + p.racket_size {
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b.vel.x *= -1
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}
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}
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// Behind racket
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if b.pos.x < p.pos.x {
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g.players[1].score++
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g.new_round()
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}
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} else {
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// Player right side
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if b.pos.x >= p.pos.x - 1 {
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if b.pos.y >= p.pos.y && b.pos.y <= p.pos.y + p.racket_size {
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b.vel.x *= -1
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}
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}
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if b.pos.x > p.pos.x {
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g.players[0].score++
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g.new_round()
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}
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}
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}
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if b.pos.x <= 1 || b.pos.x >= g.app.width {
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b.vel.x *= -1
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}
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if b.pos.y <= 2 || b.pos.y >= g.app.height {
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b.vel.y *= -1
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}
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b.update(dt)
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}
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fn (mut g Game) quit() {
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if g.app.mode != .game {
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return
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}
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g.app.mode = .menu
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}
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fn (mut g Game) draw_big_digit(px f32, py f32, digit int) {
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// TODO use draw_line or draw_point to fix tearing with non-monospaced terminal fonts
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mut gfx := g.app.tui
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x, y := int(px), int(py)
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match digit {
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0 {
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gfx.draw_text(x, y + 0, '█████')
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gfx.draw_text(x, y + 1, '█ █')
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gfx.draw_text(x, y + 2, '█ █')
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gfx.draw_text(x, y + 3, '█ █')
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gfx.draw_text(x, y + 4, '█████')
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}
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1 {
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gfx.draw_text(x + 3, y + 0, '█')
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gfx.draw_text(x + 3, y + 1, '█')
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gfx.draw_text(x + 3, y + 2, '█')
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gfx.draw_text(x + 3, y + 3, '█')
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gfx.draw_text(x + 3, y + 4, '█')
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}
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2 {
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gfx.draw_text(x, y + 0, '█████')
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gfx.draw_text(x, y + 1, ' █')
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gfx.draw_text(x, y + 2, '█████')
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gfx.draw_text(x, y + 3, '█')
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gfx.draw_text(x, y + 4, '█████')
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}
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3 {
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gfx.draw_text(x, y + 0, '█████')
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gfx.draw_text(x, y + 1, ' ██')
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gfx.draw_text(x, y + 2, ' ████')
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gfx.draw_text(x, y + 3, ' ██')
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gfx.draw_text(x, y + 4, '█████')
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}
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4 {
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gfx.draw_text(x, y + 0, '█ █')
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gfx.draw_text(x, y + 1, '█ █')
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gfx.draw_text(x, y + 2, '█████')
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gfx.draw_text(x, y + 3, ' █')
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gfx.draw_text(x, y + 4, ' █')
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}
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5 {
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gfx.draw_text(x, y + 0, '█████')
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gfx.draw_text(x, y + 1, '█')
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gfx.draw_text(x, y + 2, '█████')
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gfx.draw_text(x, y + 3, ' █')
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gfx.draw_text(x, y + 4, '█████')
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}
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6 {
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gfx.draw_text(x, y + 0, '█████')
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gfx.draw_text(x, y + 1, '█')
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gfx.draw_text(x, y + 2, '█████')
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gfx.draw_text(x, y + 3, '█ █')
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gfx.draw_text(x, y + 4, '█████')
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}
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7 {
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gfx.draw_text(x, y + 0, '█████')
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gfx.draw_text(x, y + 1, ' █')
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gfx.draw_text(x, y + 2, ' █')
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gfx.draw_text(x, y + 3, ' █')
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gfx.draw_text(x, y + 4, ' █')
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}
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8 {
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gfx.draw_text(x, y + 0, '█████')
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gfx.draw_text(x, y + 1, '█ █')
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gfx.draw_text(x, y + 2, '█████')
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gfx.draw_text(x, y + 3, '█ █')
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gfx.draw_text(x, y + 4, '█████')
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}
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9 {
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gfx.draw_text(x, y + 0, '█████')
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gfx.draw_text(x, y + 1, '█ █')
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gfx.draw_text(x, y + 2, '█████')
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gfx.draw_text(x, y + 3, ' █')
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gfx.draw_text(x, y + 4, '█████')
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}
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else {}
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}
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}
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fn (mut g Game) draw() {
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mut gfx := g.app.tui
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gfx.set_bg_color(white)
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// Border
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gfx.draw_empty_rect(1, 1, g.app.width, g.app.height)
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// Center line
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gfx.draw_dashed_line(int(f32(g.app.width) * 0.5), 0, int(f32(g.app.width) * 0.5),
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int(g.app.height))
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border := 1
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mut y, mut x := 0, 0
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for p in g.players {
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x = int(p.pos.x)
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y = int(p.pos.y)
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gfx.reset_bg_color()
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gfx.set_color(white)
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if x < f32(g.app.width) * 0.5 {
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g.draw_big_digit(f32(g.app.width) * 0.25, 3, p.score)
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} else {
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g.draw_big_digit(f32(g.app.width) * 0.75, 3, p.score)
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}
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gfx.reset_color()
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gfx.set_bg_color(white)
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// Racket
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gfx.draw_line(x, y + border, x, y + p.racket_size)
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}
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// Ball
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gfx.draw_point(int(g.ball.pos.x), int(g.ball.pos.y))
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// gfx.draw_text(22,2,'$g.ball.pos')
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gfx.reset_bg_color()
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}
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fn (mut g Game) free() {
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g.players.clear()
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}
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// TODO Remove these wrapper functions when we can assign methods as callbacks
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fn init(x voidptr) {
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mut app := &App(x)
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app.init()
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}
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fn frame(x voidptr) {
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mut app := &App(x)
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app.frame()
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}
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fn cleanup(x voidptr) {
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mut app := &App(x)
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app.free()
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}
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fn fail(error string) {
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eprintln(error)
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}
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fn event(e &ui.Event, x voidptr) {
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mut app := &App(x)
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app.event(e)
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}
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// main
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mut app := &App{}
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app.tui = ui.init({
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user_data: app
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init_fn: init
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frame_fn: frame
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cleanup_fn: cleanup
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event_fn: event
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fail_fn: fail
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capture_events: true
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hide_cursor: true
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frame_rate: 60
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})
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app.tui.run()
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