I am currently learning Go and trying to make a game which allows players to press several buttons at the same time. Right now, my code works for a while, but sometimes when I randomly press, the GetKeyboardState() always records one or more keys as pressed. The weird key only can be released when I press the key again. Then everything goes correctly again. For example, I randomly press Up, Down, Left, Right, and right shift bottom on the keyboard to control the character in the game. Suddenly, the character always tries to go right and if I press Up or Down arrow, the character will just go to the top right or the bottom right. Only if I press the right arrow button again, the character can stop go right.
I thought maybe the game goes too fast so I limit the fps under 90 but the situation still exists.
Also, I tried to print out the keyboard status and it always shows the weird bottom was pressed when the situation happened even if I did not touch my keyboard.
func GetInput(keyState []uint8, prevKeyState []uint8) []Input {
input := make([]Input, 0)
if keyState[sdl.SCANCODE_UP] != 0 {
input = append(input, Input{Up})
}
...
// Handle Down, Right, Left
if keyState[sdl.SCANCODE_RSHIFT] == 0 && prevKeyState[sdl.SCANCODE_RSHIFT] != 0 {
input = append(input, Input{RShift})
}
if keyState[sdl.SCANCODE_B] == 0 && prevKeyState[sdl.SCANCODE_B] != 0
{
input = append(input, Input{Debug})
}
// something like prevKeyState = keystate
return input
}
How I use it
keyState := sdl.GetKeyboardState()
prevKeyState := make([]uint8, len(keyState))
for {
...
input := ui.GetInput(keyState, prevKeyState)
HandleInput(input, board)
...
}