Clean Up Your Player Movement Code
How many times have you had to enter a line in your game to handle player movement that looks something like this:
if ((keyboardState.IsKeyDown(Keys.A)) ||
(gamePadState.DPad.Left == ButtonState.Pressed) ||
(gamePadState.ThumbSticks.Left.X < 0))
It's long and awkward to read and can be a pain to change. Wouldn't you rather just do this?
if (LeftPressed(currentKeyboardState, currentGamePadState))
I know I would! And now, thanks to the magic of a couple very simple functions that I will display below, now you can!
private bool LeftPressed(KeyboardState keyboardState, GamePadState gamePadState)
{
if (keyboardState.IsKeyDown(Keys.A))
{
return true;
}
if (gamePadState.DPad.Left == ButtonState.Pressed)
{
return true;
}
if (gamePadState.ThumbSticks.Left.X < 0)
{
return true;
}
return false;
}
private bool RightPressed(KeyboardState keyboardState, GamePadState gamePadState)
{
if (keyboardState.IsKeyDown(Keys.D))
{
return true;
}
if (gamePadState.DPad.Right == ButtonState.Pressed)
{
return true;
}
if (gamePadState.ThumbSticks.Left.X > 0)
{
return true;
}
return false;
}
private bool UpPressed(KeyboardState keyboardState, GamePadState gamePadState)
{
if (keyboardState.IsKeyDown(Keys.W))
{
return true;
}
if (gamePadState.DPad.Up == ButtonState.Pressed)
{
return true;
}
if (gamePadState.ThumbSticks.Left.Y > 0)
{
return true;
}
return false;
}
private bool DownPressed(KeyboardState keyboardState, GamePadState gamePadState)
{
if (keyboardState.IsKeyDown(Keys.S))
{
return true;
}
if (gamePadState.DPad.Down == ButtonState.Pressed)
{
return true;
}
if (gamePadState.ThumbSticks.Left.Y < 0)
{
return true;
}
return false;
}
These four functions should handle all your basic movement needs (though will require some modification if you plan to take advantage of the analog nature of the thumbsticks).
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