func drawObstacles(r *sdl.Renderer) {
r.SetDrawColor(255, 128, 100, 255)
for _, o := range obstacles {
rect := sdl.Rect{int32(o.X - o.Size), int32(o.Y - o.Size), int32(o.Size * 2), int32(o.Size * 2)}
r.DrawRect(&rect)
}
}
func drawShip(r *sdl.Renderer) {
ship := make([]sdl.Point, 4)
for i := 0; i < 4; i++ {
p := shipPoints[i%3]
ship[i] = sdl.Point{p.X + int32(x), p.Y + int32(y)}
}
r.SetDrawColor(255, 255, 255, 255)
err := r.DrawLines(ship)
if err != 0 {
error("Draw error")
}
}
func MainLoop(renderer *sdl.Renderer, font *ttf.Font) {
lastTick := sdl.GetTicks()
lastSecond := lastTick
frames := 0
fpsText := gfx.CreateText(renderer, font, "FPS: ... "+StatusCallback(), sdl.Color{255, 255, 255, 255})
framesPerSecond := 0
for running {
tick := sdl.GetTicks()
if tick < lastTick+10 {
sdl.Delay(1)
continue
}
delta := float64(tick-lastTick) / 1000.0
lastTick = tick
fpsText.Destroy()
fpsText = gfx.CreateText(renderer, font, fmt.Sprintf("FPS: %3d ", framesPerSecond)+StatusCallback(), sdl.Color{255, 255, 255, 255})
if tick > (lastSecond + 1000) {
lastSecond = tick
framesPerSecond = frames
frames = 0
} else {
frames++
}
handleEvents()
UpdateCallback(delta)
renderer.SetDrawColor(0, 0, 0, 0)
renderer.Clear()
RenderCallback(renderer)
gfx.RenderTexture(renderer, fpsText, 0, 0)
renderer.Present()
}
fpsText.Destroy()
}
func main() {
var window *sdl.Window
var renderer *sdl.Renderer
var points []sdl.Point
var rect sdl.Rect
var rects []sdl.Rect
window = sdl.CreateWindow(winTitle, sdl.WINDOWPOS_UNDEFINED, sdl.WINDOWPOS_UNDEFINED,
winWidth, winHeight, sdl.WINDOW_SHOWN)
if window == nil {
fmt.Fprintf(os.Stderr, "Failed to create window: %s\n", sdl.GetError())
os.Exit(1)
}
renderer = sdl.CreateRenderer(window, -1, sdl.RENDERER_ACCELERATED)
if renderer == nil {
fmt.Fprintf(os.Stderr, "Failed to create renderer: %s\n", sdl.GetError())
os.Exit(2)
}
renderer.SetDrawColor(255, 255, 255, 255)
renderer.DrawPoint(150, 300)
renderer.SetDrawColor(0, 0, 255, 255)
renderer.DrawLine(0, 0, 200, 200)
points = []sdl.Point{{0, 0}, {100, 300}, {100, 300}, {200, 0}}
renderer.SetDrawColor(255, 255, 0, 255)
renderer.DrawLines(&points, 4)
rect = sdl.Rect{300, 0, 200, 200}
renderer.SetDrawColor(255, 0, 0, 255)
renderer.DrawRect(&rect)
rects = []sdl.Rect{{400, 400, 100, 100}, {550, 350, 200, 200}}
renderer.SetDrawColor(0, 255, 255, 255)
renderer.DrawRects(&rects, 2)
rect = sdl.Rect{250, 250, 200, 200}
renderer.SetDrawColor(0, 255, 0, 255)
renderer.FillRect(&rect)
rects = []sdl.Rect{{500, 300, 100, 100}, {200, 300, 200, 200}}
renderer.SetDrawColor(255, 0, 255, 255)
renderer.FillRects(&rects, 2)
renderer.Present()
sdl.Delay(2000)
renderer.Destroy()
window.Destroy()
}