ebiten/examples/gamepad/main.go

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// Copyright 2015 Hajime Hoshi
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// +build example jsgo
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package main
import (
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"fmt"
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"log"
"strconv"
"strings"
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"github.com/hajimehoshi/ebiten"
"github.com/hajimehoshi/ebiten/ebitenutil"
"github.com/hajimehoshi/ebiten/inpututil"
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)
const (
screenWidth = 640
screenHeight = 480
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)
var (
gamepadIDs = map[int]struct{}{}
)
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func update(screen *ebiten.Image) error {
// Log the gamepad connection events.
for _, id := range inpututil.JustConnectedGamepadIDs() {
log.Printf("gamepad connected: id: %d", id)
gamepadIDs[id] = struct{}{}
}
for id := range gamepadIDs {
if inpututil.IsGamepadJustDisconnected(id) {
log.Printf("gamepad disconnected: id: %d", id)
delete(gamepadIDs, id)
}
}
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ids := ebiten.GamepadIDs()
axes := map[int][]string{}
pressedButtons := map[int][]string{}
for _, id := range ids {
maxAxis := ebiten.GamepadAxisNum(id)
for a := 0; a < maxAxis; a++ {
v := ebiten.GamepadAxis(id, a)
axes[id] = append(axes[id], fmt.Sprintf("%d:%0.2f", a, v))
}
maxButton := ebiten.GamepadButton(ebiten.GamepadButtonNum(id))
for b := ebiten.GamepadButton(id); b < maxButton; b++ {
if ebiten.IsGamepadButtonPressed(id, b) {
pressedButtons[id] = append(pressedButtons[id], strconv.Itoa(int(b)))
}
// Log button events.
if inpututil.IsGamepadButtonJustPressed(id, b) {
log.Printf("button pressed: id: %d, button: %d", id, b)
}
if inpututil.IsGamepadButtonJustReleased(id, b) {
log.Printf("button released: id: %d, button: %d", id, b)
}
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}
}
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if ebiten.IsRunningSlowly() {
return nil
}
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// Draw the current gamepad status.
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str := ""
if len(ids) > 0 {
for _, id := range ids {
str += fmt.Sprintf("Gamepad (ID: %d):\n", id)
str += fmt.Sprintf(" Axes: %s\n", strings.Join(axes[id], ", "))
str += fmt.Sprintf(" Buttons: %s\n", strings.Join(pressedButtons[id], ", "))
str += "\n"
}
} else {
str = "Please connect your gamepad."
}
ebitenutil.DebugPrint(screen, str)
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return nil
}
func main() {
if err := ebiten.Run(update, screenWidth, screenHeight, 1, "Gamepad (Ebiten Demo)"); err != nil {
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log.Fatal(err)
}
}