public virtual bool Move(double dtMS)
{
// do incremental move of the piece
Point2D tempLocation;
if (MovementAssist.CalculateNewLocation(CurrentLocation, SpeedMS, TravelDirectionRads, dtMS, out tempLocation))
{
CurrentLocation = tempLocation;
return(true);
}
return(false);
}
bool RotateTextureZeroPtAboutCentre(Texture2D tex, double hdgRads, out Point2D newZeroPoint)
{
Point2D textTopPt = new Point2D();
textTopPt.X = -tex.Width / 2;
textTopPt.Y = -tex.Height / 2;
Point2D rotPt = new Point2D();
rotPt.X = 0.0;
rotPt.Y = 0.0;
MovementAssist.RotatePoint(rotPt, textTopPt, -hdgRads, out newZeroPoint);
Debug.WriteLine("resPt.X = " + newZeroPoint.X.ToString());
Debug.WriteLine("resPt.Y = " + newZeroPoint.Y.ToString());
return(true);
}
public override bool Move(double dt)
{
Debug.WriteLine("dt = " + dt.ToString());
// currently just doing forward motion
double forwardPropulsionForce;
double rotationalTorque;
if (CalculateForceAndTorque(dt, out forwardPropulsionForce, out rotationalTorque) == false)
{
return(false);
}
double I;
if (PhysicsMaths.CalculateMomentOfInertia(DISK_INERTIA_CONSTANT, ROCKET_MASS_KG, ROCKET_RADIUS, out I) == false)
{
return(false);
}
Debug.WriteLine("forwardPropulsionForce = " + forwardPropulsionForce.ToString());
Debug.WriteLine("rotationalTorque = " + rotationalTorque.ToString());
double rotationalFriction;
if (PhysicsMaths.CalculateRotationalFrictionTorqueOfDisc(ROCKET_RADIUS, ROCKET_HEIGHT, RateOfRotationRadsSec, AIR_DENSITY, out rotationalFriction) == false)
{
return(false);
}
Debug.WriteLine("rotationalFriction = " + rotationalFriction.ToString());
Debug.WriteLine("RateOfRotationRadsSec = " + RateOfRotationRadsSec.ToString());
rotationalTorque = rotationalTorque - rotationalFriction;
double rotAccn;
if (PhysicsMaths.CalculateRotationalAcceleration(rotationalTorque, I, out rotAccn) == false)
{
return(false);
}
// calc rate of rotation
RateOfRotationRadsSec += rotAccn;
// calc new heading
HeadingRads = MovementAssist.RotateHeadingRadians(RateOfRotationRadsSec, HeadingRads, dt);
double friction = 0.0;
double resultantForce = 0.0;
if (PhysicsMaths.CalculateFriction(SpeedMS, CROSS_SECTION, Cd, AIR_DENSITY, out friction))
{
Vector powerAndFrictionVector;
Debug.WriteLine("HeadingRads = " + HeadingRads.ToString());
Debug.WriteLine(" TravelDirectionRads = " + TravelDirectionRads.ToString());
// calculate the resultant force acting on the
if (CalculateResultantForceVector(HeadingRads, forwardPropulsionForce, TravelDirectionRads + Math.PI, friction, out powerAndFrictionVector) == false)
{
return(false);
}
Debug.WriteLine("powerAndFrictionVector.Magnitude = " + powerAndFrictionVector.Magnitude.ToString());
if (CalculateNewCourseAndSpeed(powerAndFrictionVector, dt, ROCKET_MASS_KG) == false)
{
return(false);
}
}
Debug.WriteLine("SpeedMS = " + SpeedMS.ToString());
return(base.Move(dt));
}