Input

[asdfADRIAN]

Im trying to implement a double jump feature, heres the following code:

if (AirborneTime > 0.0f )
	{
		if (PlayerInput.JumpButton())
	              Velocity += Vector2.UnitY * JumpPower;
		      //AirborneTime = 0;
	}

 However, the problem with this is that I can consecutively press the Jump button and my character will continuously flutter in mid air like a bird flapping its wing. 

How would I be able to limit this? How would I check for a double tap or even better use double jump lets say only once every 2 seconds? 

[Spykam25]

I guess you can do this:

if (AirborneTime > 0.0f )
{
                bool dJumped;
                dJumped = false;
           
		if (PlayerInput.JumpButton() && !dJumped)
                {
	              Velocity += Vector2.UnitY * JumpPower;
		      //AirborneTime = 0;
                      dJumped = true;
                }
}

OR (For double jump again after two seconds)

Setup a Stopwatch:

Stopwatch watch = new Stopwatch();

Then you change the first lines of code to:

if (AirborneTime > 0.0f )
{
                bool dJumped;
                dJumped = false;
           
		if (PlayerInput.JumpButton() && !dJumped)
                {
	              Velocity += Vector2.UnitY * JumpPower;
		      watch.Start();
                      dJumped = true;
                }

                if (watch.Elapsed > TimeSpan.FromSeconds(2))
                {
                    dJumped = false;
                    watch.Stop();
                    watch.Reset();

   watch.Start();
                }
}

Basically, if the player is airbourne and dJumped is not equal to true (which means the player haven't double jumped) then enable double jump once and after 2 seconds enable the ability to double jump again.  I think that's it.  Tell me if it works!

[asdfADRIAN]

Thank you for your time to help me out! I appreciate your response. 

I have tried both solutions and unfortunately they do not work. The character is still able to double jump numerous times withotu any restrictions even with the timer.  

[Wild--Waller]

I'm a newbye and I'm not sure if I've realized what you need, but you could set a int n_jump = 0; so
if (PlayerInput.JumpButton() && jump <2)
{
Velocity += Vector2.UnitY * JumpPower;
//AirborneTime = 0;
n_jump++;
}

now I don't know how you calculate your jump's movement, but when you touch the ground you could reset n_jump to 0... If there aren't others floors a "if ( positiony = 0)" should go...

EDIT: int n_jump = 0; at the beginning of code (out the loop)

[asdfADRIAN]

Did not work either :\ 

Oh and the code you put has a typo in the following line: 

if (PlayerInput.JumpButton() && jump <2)

 it should be:

if (PlayerInput.JumpButton() && n_jump <2)

 But even with the correction it had the same result as my oriignal code and the code provided by Spykam25. ):

[Wild--Waller · Accepted solution]

using System;
using System.Collections.Generic;

using Sce.Pss.Core;
using Sce.Pss.Core.Environment;
using Sce.Pss.Core.Graphics;
using Sce.Pss.Core.Input;
using Sce.Pss.Core.Imaging; // for font

using Sce.Pss.HighLevel.GameEngine2D;
using Sce.Pss.HighLevel.GameEngine2D.Base;


namespace Updating
{
	public class AppMain
	{
		public static void Main (string[] args)
		{
			Director.Initialize();
			
			int CooY = 90;
			int n_jump = 0;
			
			
			Scene scene = new Scene();
			scene.Camera.SetViewFromViewport();
   
			//Left sprite
			Texture2D texture = new Texture2D("/Application/smile.png",false);
			TextureInfo ti = new TextureInfo(texture);
			SpriteUV sprite = new SpriteUV(ti);
			
			sprite.Quad.S = new Vector2(64,64);
			sprite.Position = scene.Camera.CalcBounds().Center;
			sprite.Position = new Vector2(sprite.Position.X - 256, CooY);
			sprite.CenterSprite();
   
			sprite.Schedule( (dt) => 
			               {		
				
				// Press X (S on the keyboard) to Jump
				if(Input2.GamePad0.Cross.Press == true && n_jump < 2)
				{
					sprite.Position = new Vector2(sprite.Position.X, sprite.Position.Y + 150);
					n_jump++;
				}
				if (sprite.Position.Y > CooY)
				{
					sprite.Position = new Vector2(sprite.Position.X, sprite.Position.Y - 5);				
				}
				else
					n_jump = 0;
			});

			
			scene.AddChild(sprite);

			Director.Instance.RunWithScene(scene);
		}
	}
}

oh, sry for the mistake

starting by the solution of this tutorial I've create a simple double jump if it could help you, it seems to work to me