public void Update(GameTime gameTime, float currentPhase /*, Vector3 headPos*/, float shipAngle)
{
Vector2 offset = Tunnel.GetTunnelOffset(currentPhase);
this.position = Vector3.Transform(this.up * distanceFromCentre, Matrix.CreateRotationZ(shipAngle)) + new Vector3(-offset.X, offset.Y, 0.0f);
Matrix cameraRotation = Matrix.CreateRotationZ(shipAngle + (float)Math.PI);
this.rotatedUp = Vector3.Transform(this.up, cameraRotation);
Vector3 direction = Tunnel.GetTunnelDirection(currentPhase);
direction.X = -direction.X;
//Matrix headRotationMatrix = Matrix.CreateFromAxisAngle(this.up, (float)Math.Atan(headPos.X));
//Vector3 newHeadPos = new Vector3(-1.0f * headPos.X, -1.0f * headPos.Y, 1.0f * headPos.Z);
//newHeadPos = Vector3.Transform(newHeadPos, headRotationMatrix * cameraRotation);
//newHeadPos.X *= headMovementScaleFactor.X;
//newHeadPos.Y *= headMovementScaleFactor.Y;
//newHeadPos.Z *= headMovementScaleFactor.Z;
//projects to a point far in the distance
Vector3 down = new Vector3(0.0f, -(lookAheadDistance * (float)Math.Tan(lookDownAngleDegrees * (float)Math.PI / 180.0f)), 0.0f);
this.cameraLookAt = position + (direction * lookAheadDistance) + Vector3.Transform(down, cameraRotation);
//this.cameraLookAt = Vector3.Transform(this.cameraLookAt, cameraRotation * Matrix.CreateRotationX(lookDownAngleDegrees * (float)(Math.PI / 180)));
View = Matrix.CreateLookAt(this.position /*+ newHeadPos*/, this.cameraLookAt, this.rotatedUp);
}
public static Vector3 GetTunnelDirection(float Phase)
{
float deltaPhase = 0.01f;
Vector3 currentPosition = new Vector3(Tunnel.GetTunnelOffset(Phase), Phase);
Vector3 newPosition = new Vector3(Tunnel.GetTunnelOffset(Phase + deltaPhase), Phase + deltaPhase);
return(Vector3.Normalize(newPosition - currentPosition));
//return new Vector3(0.0f, 0.0f, 1.0f);
}
public void ConstructCurves()
{
Vector2 offset;
for (int i = 0; i <= vertices.GetUpperBound(0); i++)
{
offset = Tunnel.GetTunnelOffset(this.PhaseAtStart - vertices[i].Position.Z + this.ZAtStart);
vertices[i].Position.X += offset.X;
vertices[i].Position.Y += offset.Y;
}
}
public float DeltaPhase(GameTime gameTime)
{
Vector3 currentDirection = Tunnel.GetTunnelDirection(this.currentPhase);
float distanceTravelled = (float)gameTime.ElapsedGameTime.TotalMilliseconds * this.speed / 1000.0f;
float deltaDistance = distanceTravelled / (float)Tunnel.deltaResolution;
Vector3 deltaPosition;
Vector3 currentPosition = new Vector3(Tunnel.GetTunnelOffset(this.currentPhase), this.currentPhase);
for (int i = 0; i < deltaResolution; i++)
{
deltaPosition = currentDirection * deltaDistance;
Vector2 realXY = Tunnel.GetTunnelOffset(currentPhase + deltaPosition.Z);
deltaPosition.X = realXY.X;
deltaPosition.Y = realXY.Y;
currentPosition += deltaPosition;
}
return(currentPosition.Z - currentPhase);
}
public Vector3 GetTunnelCentrePos(float deltaPhase)
{
Vector2 offset = Tunnel.GetTunnelOffset(this.currentPhase + deltaPhase);
return(new Vector3(-offset.X, offset.Y, deltaPhase));
}