public void UpdateVelocity(Matrix MatrixTransform, float delta)
{
/*Anti Acc Force*/
Drag = DragCoff * Speed; //Unit: N
Vector3 directedThrust = Vector3.TransformNormal(new Vector3(0, 0, 1), MatrixTransform); /*(0,0,1) is the original ship direction*/
/*Compute Acc and De-Acc*/
Acc = UserThrust / CurrentWeight;
Deacc = Drag / CurrentWeight;
if (Acc > 0)
{
/*Compute Velocity and Speed*/
CurrentVelocity += directedThrust * Acc * delta;
SpeedDir = CurrentVelocity;
if (Speed != 0 && SpeedDir != Vector3.Zero)
{
SpeedDir.Normalize();
}
CurrentVelocity -= SpeedDir * Deacc * delta; //M/S^2
Speed = CurrentVelocity.Length(); //M/S
}
else
{
SpeedDir = CurrentVelocity;
if (Speed != 0 && SpeedDir != Vector3.Zero)
{
SpeedDir.Normalize();
}
CurrentVelocity -= SpeedDir * (Deacc - Acc) * delta; //M/S^2
Speed = CurrentVelocity.Length(); //M/S
}
}
public override void Update()
{
if (IsDead)
{
return;
}
if (CurrentVelocity.Length() > 1)
{
CurrentVelocity.Normalize();
}
// Update speed
Character.SetVelocity(CurrentVelocity * MaximumSpeed);
ApplyHeadRotation(HeadRotation);
ApplyBodyRotation(BodyRotation);
// Body hover
const float amp = 0.05f;
const float freq = 0.5f;
Model.Entity.Transform.Position.Y = initialHeight +
amp *
(float)
Math.Sin((initialShift + Game.UpdateTime.Total.TotalSeconds) * freq * 2 *
Math.PI);
}
public void CancelMovementAlongAxis(Vector2 axis)
{
CurrentVelocity -= CurrentVelocity.Dot(axis) * axis;
CurrentAcceleration -= CurrentAcceleration.Dot(axis) * axis;
}
