89 lines
1.3 KiB
Go
89 lines
1.3 KiB
Go
// 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 gl
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import gg
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import glfw
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import time
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struct Game {
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mut:
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vg *gg.GG
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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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main_wnd *glfw.Window
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draw_fn voidptr
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}
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fn main() {
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glfw.init()
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width := 600
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height := 300
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mut game := &Game{
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vg: 0
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dx: 3
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dy: 3
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height: height
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width: width
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}
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mut window := glfw.create_window(glfw.WinCfg {
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width: width,
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height: height,
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borderless: false,
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title: 'Hot code reloading demo'
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ptr: game
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})
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//window.onkeydown(key_down)
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game.main_wnd = window
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window.make_context_current()
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gg.init()
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game.vg = gg.new_context(gg.Cfg {
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width: width
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height: height
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font_size: 20
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use_ortho: true
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})
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println('Starting game loop...')
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go game.run()
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for {
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gl.clear()
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gl.clear_color(255, 255, 255, 255)
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game.draw()
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window.swap_buffers()
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glfw.wait_events()
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}
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}
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const (
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W = 50
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)
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//[live] TODO segfaults
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fn (ctx &Game) draw() {
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ctx.vg.draw_rect(ctx.x, ctx.y, W, W, gx.rgb(0, 0, 255))
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}
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fn (ctx mut Game) run() {
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for {
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ctx.x += ctx.dx
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ctx.y += ctx.dy
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if ctx.y >= ctx.height - W || ctx.y <= 0 {
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ctx.dy = - ctx.dy
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}
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if ctx.x >= ctx.width - W || ctx.x <= 0 {
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ctx.dx = - ctx.dx
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}
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// Refresh
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time.sleep_ms(30)
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glfw.post_empty_event()
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}
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}
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