How do I have an arrow follow different height parabolas depending on how long the player holds down a key?
- by Moondustt
i'm trying to throw an arrow in my game, but i'm having a hard time trying to realize how to make a good parabola.
What I need:
The more you hold "enter" stronger the arrow goes.
The arrow angle will be always the same, 45 degrees.
This is what I have already have:
private float velocityHeld = 1f;
protected override void Update(GameTime gameTime)
{
private void GetKeyboardEvent()
{
if (Keyboard.GetState().IsKeyDown(Keys.Enter) && !released)
{
timeHeld += velocityHeld;
holding = true;
}
else
{
if (holding)
{
released = true;
holding = false;
lastTimeHeld = timeHeld;
}
}
}
if (released && timeHeld > 0)
{
float alpha = MathHelper.ToRadians(45f);
double vy = timeHeld * Math.Sin(alpha);
double vx = timeHeld * Math.Cos(alpha);
ShadowPosition.Y -= (int)vy;
ShadowPosition.X += (int)vx;
timeHeld -= velocityHeld;
}
else
{
released = false;
}
}
My question is, what do I need to do to make the arrow to go bottom as it loses velocity (timeHeld) to make a perfect parabola?
