90 lines
1.7 KiB
V
90 lines
1.7 KiB
V
// Build this example with
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// v -live bounce.v
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module main
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import gx
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import gg
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import time
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struct Game {
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mut:
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gg &gg.Context
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x int
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y int
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dy int
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dx int
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height int
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width int
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draw_fn voidptr
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}
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const (
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window_width = 400
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window_height = 300
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width = 50
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)
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fn main() {
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mut game := &Game{
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gg: 0
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dx: 2
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dy: 2
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height: window_height
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width: window_width
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draw_fn: 0
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}
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game.gg = gg.new_context({
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width: window_width
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height: window_height
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font_size: 20
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use_ortho: true
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user_data: game
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window_title: 'Hot code reloading demo'
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create_window: true
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frame_fn: frame
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bg_color: gx.white
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font_path: gg.system_font_path()
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})
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// window.onkeydown(key_down)
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println('Starting the game loop...')
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go game.run()
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game.gg.run()
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}
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// Try uncommenting or changing the lines inside the live functions.
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// Guess what will happen:
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[live]
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fn frame (mut game Game) {
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game.gg.begin()
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game.gg.draw_text_def(10, 5, 'Modify examples/hot_reload/bounce.v to get instant updates')
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game.gg.draw_rect(game.x, game.y, width, width, gx.blue)
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game.gg.draw_rect(window_width - width - game.x + 10, 200 - game.y + width, width, width, gx.rgb(228, 10, 55))
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game.gg.draw_rect(game.x - 25, 250 - game.y, width, width, gx.rgb(28, 240, 55))
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game.gg.end()
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}
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[live]
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fn (mut game Game) update_model() {
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speed := 2
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game.x += speed * game.dx
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game.y += speed * game.dy
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if game.y >= game.height - width || game.y <= 0 {
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game.dy = -game.dy
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}
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if game.x >= game.width - width || game.x <= 0 {
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game.dx = -game.dx
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}
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}
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fn (mut game Game) run() {
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for {
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game.update_model()
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//glfw.post_empty_event() // Refresh
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time.sleep_ms(17) // 60fps
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}
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}
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