Merge pull request faiface#272 from jstewart7/master

Added input event tracking to prevent missed inputs

pixelgl/input.go

@@ -13,14 +13,14 @@ func (w *Window) Pressed(button Button) bool {
  return w.currInp.buttons[button]
 }
 
-// JustPressed returns whether the Button has just been pressed down.
+// JustPressed returns whether the Button has been pressed in the last frame.
 func (w *Window) JustPressed(button Button) bool {
- return w.currInp.buttons[button] && !w.prevInp.buttons[button]
+ return w.pressEvents[button]
 }
 
-// JustReleased returns whether the Button has just been released up.
+// JustReleased returns whether the Button has been released in the last frame.
 func (w *Window) JustReleased(button Button) bool {
- return !w.currInp.buttons[button] && w.prevInp.buttons[button]
+ return w.releaseEvents[button]
 }
 
 // Repeated returns whether a repeat event has been triggered on button.
@@ -362,8 +362,10 @@ func (w *Window) initInput() {
  w.window.SetMouseButtonCallback(func(_ *glfw.Window, button glfw.MouseButton, action glfw.Action, mod glfw.ModifierKey) {
  switch action {
  case glfw.Press:
+ w.tempPressEvents[Button(button)] = true
  w.tempInp.buttons[Button(button)] = true
  case glfw.Release:
+ w.tempReleaseEvents[Button(button)] = true
  w.tempInp.buttons[Button(button)] = false
  }
  })
@@ -374,8 +376,10 @@ func (w *Window) initInput() {
  }
  switch action {
  case glfw.Press:
+ w.tempPressEvents[Button(key)] = true
  w.tempInp.buttons[Button(key)] = true
  case glfw.Release:
+ w.tempReleaseEvents[Button(key)] = true
  w.tempInp.buttons[Button(key)] = false
  case glfw.Repeat:
  w.tempInp.repeat[Button(key)] = true
@@ -431,6 +435,12 @@ func (w *Window) doUpdateInput() {
  w.prevInp = w.currInp
  w.currInp = w.tempInp
 
+ w.pressEvents = w.tempPressEvents
+ w.releaseEvents = w.tempReleaseEvents
+
+ // Clear last frame's temporary status
+ w.tempPressEvents = [KeyLast + 1]bool{}
+ w.tempReleaseEvents = [KeyLast + 1]bool{}
  w.tempInp.repeat = [KeyLast + 1]bool{}
  w.tempInp.scroll = pixel.ZV
  w.tempInp.typed = ""

pixelgl/window.go

@@ -100,6 +100,9 @@ type Window struct {
  typed string
  }
 
+ pressEvents, tempPressEvents [KeyLast + 1]bool
+ releaseEvents, tempReleaseEvents [KeyLast + 1]bool
+
  prevJoy, currJoy, tempJoy joystickState
 }