如何使用C＃和XNA进行双跳？

Question

This is my current code for a single jump, input from the user sets jump to true and a single jump works with no errors, however I cannot produce a second midair jump for my game. I had to do this without unity for school so it is only working with rectangles.

if (jumping) //only run when jump has been initiated by space or A
{
    rect.Y = centreY - (int)(Math.Sin(angle) * range); //move player up to a maximum of range's value

    angle += speedY; //gradually reduce player's y by reducing angle's value

    newCentreY = rect.Y;

    if (angle > Math.PI) //reset player to not jumping when angle is greater than 3.14
    {
        angle = 0;
        jumping = false;
    }
}

Here's the input handler for jumps:

if (userControl.Buttons.A == ButtonState.Pressed || keystate.IsKeyDown(Keys.Space)) //jump when A or space is pressed 
{ 
    jumping = true; 
} 
Jump(userControl, keystate); //jump method

Answer 1

I think you should make your angle to be 0 to continue jumping.

if (doubleJumping)
{
    angle = 0;
    doubleJumping = false;
}
if (jumping) //only run when jump has been initiated by space or A
{
    rect.Y = centreY - (int)(Math.Sin(angle) * range); //move player up to a maximum of range's value

    angle += speedY; //gradually reduce player's y by reducing angle's value

    newCentreY = rect.Y;

    if (angle > Math.PI) //reset player to not jumping when angle is greater than 3.14
    {
        angle = 0;
        jumping = false;
    }
 }