//The main loop. Handles drawing, events, ... This should be broken up into a smaller set of functions
// if more event logic is handled.
func mainLoop(screen *sdl.Surface, markers []Marker, goals []*Goal) {
var curGoal int
timer := make(chan bool, 0)
running := true
redraw := true
requestRedraw := false
stickCount := len(markers)
// start the timer
go timeLoop(timer)
for running {
if redraw {
items := list.New()
nextGoal := false
var curRect *sdl.Rect
if curGoal >= 0 && curGoal < len(goals) {
curRect = goals[curGoal].Rect()
}
for i := 0; i < stickCount; i++ {
markers[i].Update()
items.PushBack(markers[i])
if curRect != nil {
if markers[i].Intersects(curRect) {
nextGoal = true
}
}
}
if nextGoal {
curGoal++
if curGoal >= len(goals) {
curGoal = 0
}
}
if curGoal >= 0 && curGoal < len(goals) {
items.PushBack(goals[curGoal])
}
draw(screen, items)
screen.Flip()
//fmt.Printf(".")
redraw = false
requestRedraw = false
}
select {
case <-timer:
zeroCnt := 0
for _, m := range markers {
if m.last2Zero {
zeroCnt++
}
}
if zeroCnt < stickCount || requestRedraw {
redraw = true
}
case _event := <-sdl.Events:
switch e := _event.(type) {
case sdl.QuitEvent:
running = false
case sdl.KeyboardEvent:
if e.Keysym.Sym == sdl.K_ESCAPE || e.Keysym.Sym == sdl.K_q {
running = false
}
case sdl.JoyAxisEvent:
if e.Axis < 2 {
val := float32(0.0)
if e.Value > 2000 || e.Value < -2000 {
val = float32(e.Value) / float32(uint32(0x0ffff))
}
//fmt.Println("got joystick axis event ", e)
if e.Axis == 0 {
markers[e.Which].Vax = val
} else {
markers[e.Which].Vay = val
}
requestRedraw = true
}
case sdl.JoyButtonEvent:
if e.State > 0 {
markers[e.Which].Big++
} else {
markers[e.Which].Big--
}
if markers[e.Which].Big < 0 {
markers[e.Which].Big = 0
}
requestRedraw = true
case sdl.JoyHatEvent:
switch e.Value {
case sdl.HAT_CENTERED:
markers[e.Which].Vhx = 0.0
markers[e.Which].Vhy = 0.0
case sdl.HAT_UP:
markers[e.Which].Vhx = 0.0
markers[e.Which].Vhy = -1.0
case sdl.HAT_RIGHT:
markers[e.Which].Vhx = 1.0
markers[e.Which].Vhy = 0.0
case sdl.HAT_DOWN:
markers[e.Which].Vhx = 0.0
markers[e.Which].Vhy = 1.0
case sdl.HAT_LEFT:
markers[e.Which].Vhx = -1.0
markers[e.Which].Vhy = 0.0
case sdl.HAT_RIGHTUP:
markers[e.Which].Vhx = 1.0
markers[e.Which].Vhy = -1.0
case sdl.HAT_RIGHTDOWN:
markers[e.Which].Vhx = 1.0
markers[e.Which].Vhy = 1.0
case sdl.HAT_LEFTUP:
markers[e.Which].Vhx = -1.0
markers[e.Which].Vhy = -1.0
case sdl.HAT_LEFTDOWN:
markers[e.Which].Vhx = -1.0
markers[e.Which].Vhy = 1.0
}
//fmt.Println("Hat event ", e, " (",markers[e.Which].Vhx,",",markers[e.Which].Vhy,")")
requestRedraw = true
case sdl.ResizeEvent:
//println("resize screen ", e.W, e.H)
panic("Resize not supported yet")
//screen = sdl.SetVideoMode(int(e.W), int(e.H), 32, sdl.RESIZABLE)
//if screen == nil {
// fmt.Println(sdl.GetError())
//}
}
}
// yeild to allow other activities (such as the timer loop)
runtime.Gosched()
}
}
