145 lines
2.8 KiB
Go
145 lines
2.8 KiB
Go
package main
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import (
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"fmt"
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"log"
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"os"
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"runtime"
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"gitea.wisellama.rocks/Project-Ely/project-ely/config"
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"gitea.wisellama.rocks/Wisellama/gosimpleconf"
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"github.com/veandco/go-sdl2/sdl"
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)
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func main() {
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var err error
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configMap, err := config.Configure("game.conf")
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if err != nil {
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log.Printf("error during configure: %v\n", err)
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os.Exit(1)
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}
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err = run(configMap)
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if err != nil {
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log.Fatal(err)
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}
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}
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func run(configMap gosimpleconf.ConfigMap) error {
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runtime.LockOSThread()
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err := sdl.Init(config.SDL_INIT_FLAGS)
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if err != nil {
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err = fmt.Errorf("failed initializing SDL: %w", err)
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return err
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}
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defer sdl.Quit()
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err = config.SdlSettings()
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if err != nil {
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err = fmt.Errorf("failed in SDL settings: %w", err)
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return err
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}
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gameWindow, err := createWindow(configMap["game.title"])
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if err != nil {
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err = fmt.Errorf("failed creating SDL window: %w", err)
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return err
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}
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defer gameWindow.Destroy()
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renderer, err := sdl.CreateRenderer(gameWindow, -1, sdl.RENDERER_ACCELERATED)
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if err != nil {
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err = fmt.Errorf("failed creating SDL renderer: %w", err)
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return err
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}
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defer renderer.Destroy()
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var rect *sdl.Rect
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var x int32 = 0
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var y int32 = 0
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keystates := make(map[sdl.Keycode]bool)
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running := true
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for running {
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for event := sdl.PollEvent(); event != nil; event = sdl.PollEvent() {
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switch e := event.(type) {
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case *sdl.QuitEvent:
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running = false
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case *sdl.KeyboardEvent:
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if e.Keysym.Sym == sdl.K_ESCAPE {
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log.Println("Esc quitting")
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running = false
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}
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// Key states (just set a boolean whether the key is actively being pressed)
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if e.Type == sdl.KEYDOWN {
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keystates[e.Keysym.Sym] = true
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} else if e.Type == sdl.KEYUP {
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keystates[e.Keysym.Sym] = false
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}
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}
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}
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if keystates[sdl.K_a] {
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x -= 1
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if x < 0 {
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x = 0
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}
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}
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if keystates[sdl.K_d] {
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x += 1
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w, _ := gameWindow.GetSize()
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if x+rect.W > w {
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x = w - rect.W
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}
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}
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// Y is inverted, positive Y moves downward
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if keystates[sdl.K_w] {
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y -= 1
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if y < 0 {
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y = 0
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}
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}
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if keystates[sdl.K_s] {
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y += 1
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_, h := gameWindow.GetSize()
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if y+rect.H > h {
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y = h - rect.H
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}
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}
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// Black background
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renderer.SetDrawColor(0, 0, 0, 255)
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renderer.Clear()
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// Blue square
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renderer.SetDrawColor(0, 0, 255, 255)
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rect = &sdl.Rect{X: x, Y: y, W: 200, H: 200}
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renderer.DrawRect(rect)
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renderer.FillRect(rect)
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renderer.Present()
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sdl.Delay(16)
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}
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return nil
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}
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func createWindow(title string) (*sdl.Window, error) {
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window, err := sdl.CreateWindow(
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title,
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sdl.WINDOWPOS_UNDEFINED,
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sdl.WINDOWPOS_UNDEFINED,
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config.SDL_WINDOW_WIDTH,
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config.SDL_WINDOW_HEIGHT,
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config.SDL_WINDOW_FLAGS)
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if err != nil {
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log.Println("Failed creating SDL window")
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return nil, err
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}
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return window, nil
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}
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