Joystick position: Difference between revisions
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ENDPROC</lang>
=={{header|Go}}==
{{libheader|termbox-go}}
{{libheader|joystick(go)}}
<lang go>package main
import (
"fmt"
"github.com/nsf/termbox-go"
"github.com/simulatedsimian/joystick"
"log"
"os"
"strconv"
"time"
)
func printAt(x, y int, s string) {
for _, r := range s {
termbox.SetCell(x, y, r, termbox.ColorDefault, termbox.ColorDefault)
x++
}
}
func readJoystick(js joystick.Joystick, hidden bool) {
jinfo, err := js.Read()
check(err)
w, h := termbox.Size()
tbcd := termbox.ColorDefault
termbox.Clear(tbcd, tbcd)
printAt(1, h-1, "q - quit")
if hidden {
printAt(11, h-1, "s - show buttons:")
} else {
bs := ""
printAt(11, h-1, "h - hide buttons:")
for button := 0; button < js.ButtonCount(); button++ {
if jinfo.Buttons&(1<<uint32(button)) != 0 {
// Buttons assumed to be numbered from 1, not 0.
bs += fmt.Sprintf(" %X", button+1)
}
}
printAt(28, h-1, bs)
}
// Map axis values in range -32767 to +32768 to termbox co-ordinates.
x := int(float64((jinfo.AxisData[0]+32767)*(w-1)) / 65535)
y := int(float64((jinfo.AxisData[1]+32767)*(h-2)) / 65535)
printAt(x, y, "+") // display crosshair
termbox.Flush()
}
func check(err error) {
if err != nil {
log.Fatal(err)
}
}
func main() {
// Under Linux the id is used to construct the joystick device name.
// For example: id 0 will open device: "/dev/input/js0"
// Under Windows the id is the actual numeric id of the joystick.
jsid := 0
// Optionally pass joystick id to be used as a command line argument.
if len(os.Args) > 1 {
i, err := strconv.Atoi(os.Args[1])
check(err)
jsid = i
}
js, jserr := joystick.Open(jsid)
check(jserr)
err := termbox.Init()
check(err)
defer termbox.Close()
eventQueue := make(chan termbox.Event)
go func() {
for {
eventQueue <- termbox.PollEvent()
}
}()
ticker := time.NewTicker(time.Millisecond * 40)
hidden := false // Controls whether button display hidden or not.
for doQuit := false; !doQuit; {
select {
case ev := <-eventQueue:
if ev.Type == termbox.EventKey {
if ev.Ch == 'q' {
doQuit = true
} else if ev.Ch == 'h' {
hidden = true
} else if ev.Ch == 's' {
hidden = false
}
}
if ev.Type == termbox.EventResize {
termbox.Flush()
}
case <-ticker.C:
readJoystick(js, hidden)
}
}
}</lang>
=={{header|GUISS}}==
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