Forums » Help » I'd like to save a sequence of keyboard inputs, then use that saved sequence to move an entity.

I'd like to listen for and then save various keyboard inputs (arrow keys, letters A and D).

When a user hits the 'enter' key I'd like to use those saved inputs to control the movement/action of an entity.

For example. A user might hit the left arrow, then up arrow, then right arrow, then ‘enter’. The Entity he’s controlling in my game would then move left, up and then right.

Is it possible to delay the movement/action commands to an Entity in this fashion?

Thanks in advance!

Ethan

Relevant.

So, what you need is an array of movement commands. This array is filled when the keys are pressed and played back after you press enter. You also need to keep track if your entity is in "recording" or "playback" mode.

If you want to have continuous movement, you have to record the movement in each frame. You can do this in your entity's update function. Something like this should get you started:

moves: [],
state: 'recording',

update: function() {
	if( this.state == 'recording' ) {
		
		// if a key was pressed, append it to the
		// moves array
		if( ig.input.state('up') ) {
			this.moves.push('up');
		}
		else if( ig.input.state('down') {
			this.moves.push('down');
		}
		// handle x axis in the same way
		
		
		if( ig.input.pressed('enter') ) {
			// switch to playback mode
			this.state = 'playback';
		}
	}
	else if( this.state == 'playback' ) {
		
		if( this.moves.length == 0 ) {
			// no more moves. do something here
			return;
		}
		
		
		// shift the first move from the moves array.
		var currentMove = this.moves.shift();
		
		if( currentMove == 'up' ) {
			this.vel.y = -50;
		}
		else if( currentMove == 'down' ) {
			this.vel.y = 50;
		}
		else {
			this.vel.y = 0;
		}
		// handle x axis in the same way
	}
	
	// don't forget to call the parent update();
	// this actually moves the entity according to
	// its velocity
	this.parent();
}

I&039;m curious. What if the frame rate drops from 60 FPS to 50 FPS? Wouldn't this mean that fewer actions are processed per second? And would that mean that, since #ig.Timer instances will have progressed the same regardless of the difference in frame rate, each playback could potentially yield very different results?