Why is my Texture becoming slower when it approaches it's destination?

Question

I have a texture drawn on screen. Whenever I click on the viewport it remembers its destination and starts moving towards it, until it is there. This is the code I am using therefore:

//Check if destination was reached
if ((currentDestination - position).Length() <= movementSpeed)
{
     // Stop moving
     position = currentDestination;                        
     playerState = PlayerState.Idle;
     reachedDestination = true;
}

// If destination is not reached
if(!reachedDestination)
{    
    Vector2 direction = (currentDestination - position); // gives the direction needed to travel from position to target
    angle = (float)(Math.Atan2(direction.Y, direction.X) + MathHelper.PiOver2);

    direction.Normalize(); // we need it as a unit vector

    position += direction * movementSpeed;
    // The Y coordinate stays the same in this case
    position.Y = 455;
}

It does work, but the closer the texture is to the destination, the slower it gets. Why is that?

Answer 1

I believe this is the line giving you trouble.

position.Y = 455;

The way you're doing this, the X component of the velocity is getting smaller. direction is always changing. Even though the distance is closing on the X axis, it stays the same on the Y-axis. So, when it's normalized, the Y distance is relatively greater, so X will get smaller. Something along the lines of this would work.

Vector2 alignedDestination = new Vector2(currentDestination.X, 455); //Added line
Vector2 direction = (alignedDestination - position); // gives the direction needed to travel from position to target