private void Body_ApplyForce(Body sender, BodyForceEventArgs e)
{
// Apply Gravity
if (!_bodyForces.ContainsKey(sender))
{
return;
}
e.AddForce(_bodyForces[sender]);
}
private void Body_ApplyForce(Body sender, BodyForceEventArgs e)
{
if (_shouldRandomizeVelocities)
{
#region Set Velocities
_didRandomizeVelocities = true;
Vector3D newVelocity = Math3D.GetRandomVector_Spherical(MAXRANDVELOCITY * _randVelMultiplier);
e.AddImpulse(newVelocity, sender.CenterOfMass.ToVector());
#endregion
}
// Apply Gravity
if (!_cubeForces.ContainsKey(sender))
{
return;
}
e.AddForce(_cubeForces[sender]);
}
private void Cube_ApplyForce(Body sender, BodyForceEventArgs e)
{
if (_shouldRandomizeVelocities)
{
#region Set Velocities
_didRandomizeVelocities = true;
Vector3D newVelocity = Math3D.GetRandomVector_Spherical(MAXRANDVELOCITY * _randVelMultiplier);
//sender.Velocity.X = newVelocity.X;
//sender.Velocity.Y = newVelocity.Y;
//sender.Velocity.Z = newVelocity.Z;
e.AddImpulse(newVelocity, sender.CenterOfMass.ToVector());
#endregion
}
#region Do Gravity
// Calculate force between the two
//TODO: Calculate these forces in one place and remember the results
Point3D blueCenterWorld = GetWorldCenterMass(_blueCube);
Point3D redCenterWorld = GetWorldCenterMass(_redCube);
Vector3D gravityLink = blueCenterWorld - redCenterWorld;
double force = GRAVITATIONALCONSTANT * (_blueCube.Mass * _redCube.Mass) / gravityLink.LengthSquared;
gravityLink.Normalize();
gravityLink = Vector3D.Multiply(force, gravityLink);
// Apply the force
if (sender == _blueCube)
{
e.AddForce(Vector3D.Multiply(-1d, gravityLink));
}
else if (sender == _redCube)
{
e.AddForce(gravityLink);
}
else
{
MessageBox.Show("Unknown Sender: " + sender.ToString(), this.Title, MessageBoxButton.OK, MessageBoxImage.Error);
return;
}
#endregion
}
private void Body_ApplyForce(Body sender, BodyForceEventArgs e)
{
ConvexBody3D senderCast = sender as ConvexBody3D;
if (senderCast == null)
{
return;
}
#region Boundry Force
Vector3D positionWorld = senderCast.PositionToWorld(senderCast.CenterOfMass).ToVector();
// Just using one property from boundry assumes the boundry is square, and max is positive
double boundryMax = _boundryMax.X;
double maxDistance = _boundryMax.X * .85d;
if (positionWorld.LengthSquared > maxDistance * maxDistance)
{
// Get the distance from the max distance
double distFromMax = positionWorld.Length - maxDistance; // wait till now to do the expensive operation.
// I want an acceleration of zero when distFromMax is 1, but an accel of 10 when it's boundryMax
//NOTE: _boundryMax.X is to the edge of the box. If they are in the corner the distance will be greater, so the accel will be greater
double accel = UtilityCore.GetScaledValue(0, 30, 0, boundryMax - maxDistance, distFromMax);
// Apply a force
Vector3D force = positionWorld;
force.Normalize();
force *= accel * senderCast.Mass * -1d;
e.AddForce(force);
}
#endregion
#region Gravity
if (_hasGravity)
{
//TODO: Attract all other objects to the asteroids
if (senderCast.MaterialGroupID == _materialManager.AsteroidMaterialID && _asteroidGravityForces.ContainsKey(senderCast))
{
e.AddForce(_asteroidGravityForces[senderCast]);
}
else if (senderCast.MaterialGroupID == _materialManager.ShipMaterialID && _asteroidGravityForces.Keys.Count > 0) // the asteroids only attract every few frames. If I attract every frame, the forces are unbalanced, and the ship ends up propelling the asteroid around
{
#region Ship to asteroids
Point3D shipPos = senderCast.PositionToWorld(senderCast.CenterOfMass);
double shipMass = senderCast.Mass;
Vector3D gravityForce = new Vector3D(0, 0, 0);
foreach (Asteroid asteroid in _asteroids)
{
#region Apply Gravity
Vector3D gravityLink = shipPos - asteroid.PositionWorld;
double force = GRAVITATIONALCONSTANT * (asteroid.Mass * shipMass) / gravityLink.LengthSquared;
gravityLink.Normalize();
gravityLink *= force;
//_asteroidGravityForces[_asteroids[innerCntr].PhysicsBody] += gravityLink;
gravityForce -= gravityLink;
#endregion
}
e.AddForce(gravityForce);
#endregion
}
}
#endregion
#region Set Velocities
if (_setVelocityArgs != null)
{
_hasSetVelocities = true;
// See if the velocity should be set for this type of object
bool shouldSetVelocity = false;
if (_setVelocityArgs.Asteroids && senderCast.MaterialGroupID == _materialManager.AsteroidMaterialID)
{
shouldSetVelocity = true;
}
else if (_setVelocityArgs.Minerals && senderCast.MaterialGroupID == _materialManager.MineralMaterialID)
{
shouldSetVelocity = true;
}
if (shouldSetVelocity)
{
// Figure out the velocity
Vector3D velocity = new Vector3D(0, 0, 0);
Vector3D angularVelocity = new Vector3D(0, 0, 0);
if (_setVelocityArgs.Speed > 0d)
{
velocity = Math3D.GetRandomVector_Spherical(_setVelocityArgs.Speed);
angularVelocity = Math3D.GetRandomVector_Spherical(_setVelocityArgs.Speed / 10d);
if (_setVelocityArgs.IsRandom)
{
double halfSpeed = _setVelocityArgs.Speed / 2d;
if (velocity.Length < halfSpeed)
{
// It's going too slow, choose a new speed between half and full
velocity.Normalize();
double newSpeed = halfSpeed + (StaticRandom.NextDouble() * halfSpeed);
velocity *= newSpeed;
}
}
else
{
// GetRandomVectorSpherical returns random, but this should be fixed
velocity.Normalize();
velocity *= _setVelocityArgs.Speed;
}
}
// Set it (and clear rotation)
senderCast.Omega = angularVelocity;
senderCast.Velocity = velocity;
}
}
#endregion
}