Double-tap

[Na]

Is there anyway I can make a character run by double-tapping a key?

For example, when I double tap the right key, I want the movement speed of the active object to increase by a number.

Thank you in advance

[Blue66]

Don't know if that is the most efficient way, but I would solve this in 3 events.

1. (this is just for reducing the tap-o-meter timer)
<player> Value X > 0
- sub 1 from <player>Value X

2. (this sets up the tap-o-meter)
joystick direction is pressed
<player> Megaspeedvalue = 0
- add 50 (or any number you want) to <player> Value X

3. (this triggers the increased speed)
<player> Value X > 60 (or any number that's bigger than the last one)
- add <player> Megaspeedvalue 10

[Na]

I don't really understand what you're saying (I'm still new to this).

Can you maybe describe this in more detail?

[Blue66]

Let's take the default values from my example.

First event just makes Value X a countdown. Whenever it's more than zero, it will substract 1 per frame. This means when you have a default frame rate of the game of 50, and you set the value to 50, it will take the game one second to reach zero again.

The second event is the double tap. It will add 50 to the countdown as soon as you press the button. If you press it repeatedly, it will add more and more to the countdown. But because it's a countdown, the number will always go back to zero if the player waits too long. This is to give the player a time limit in which he has to tap the key again to run faster.

The third event is the actual action that happens if the player has done it right. It will activate, as soon as the countdown (Value reaches 60. This means that the player has 40 frames (barely a second) time to touble tap and make the magic happen. Remember, when you press it once, it adds 50 to the countdown, which will be lowered by 1 per frame. So if it's still 10 or more and you hit the button again, it will go over 60 and the event will trigger.

[Stephen]

Chaos has a couple of examples on his site that use this method:
Examples