public void Update(Seconds deltaSeconds)
{
if (this is MovableEntity movableEntity)
{
Meters horizontalDelta = deltaSeconds * movableEntity.Horizontal.Speed;
Meters newXlocation = movableEntity.Location.X + horizontalDelta;
//if you are leaving the screen
if (newXlocation >= movableEntity.Horizontal.UpperBound)
{
//change direction
movableEntity.Horizontal.Speed *= (-1);
//move as far as you can
movableEntity.Location.X = movableEntity.Horizontal.UpperBound;
}
else if (newXlocation <= movableEntity.Horizontal.LowerBound)
{
//change direction
movableEntity.Horizontal.Speed *= (-1);
//move as far as you can
movableEntity.Location.X = movableEntity.Horizontal.LowerBound;
}
else
{
//just move
movableEntity.Location.X += horizontalDelta;
}
}
if (this is MovableJumpingEntity movableJumpingEntity)
{
Meters verticalDelta = deltaSeconds * movableJumpingEntity.Vertical.Speed;
Meters newYlocation = movableJumpingEntity.Location.Y + verticalDelta;
//if you are tryint to fly away from the screen
if (newYlocation >= movableJumpingEntity.Vertical.UpperBound)
{
//change direction
movableJumpingEntity.Vertical.Speed *= (-1);
//move as far as you can
movableJumpingEntity.Location.Y = movableJumpingEntity.Vertical.UpperBound;
}
//if you reach the ground
else if (newYlocation <= movableJumpingEntity.Vertical.LowerBound)
{
//just stop falling
movableJumpingEntity.Location.Y = movableJumpingEntity.Vertical.LowerBound;
}
else
{
//just move
movableJumpingEntity.Location.Y += verticalDelta;
}
}
}
public static Meters Meters(this int value)
{
Meters met = new Meters(value);
return(met);
}