protected void OnMove(IGameObject sender)
{
//IGameObjects use a position located in the top-left corner of the object
//and use world units, not sim units, so we need to convert both.
if (Bodies != null)
{
Vector2 position = ConvertUnits.ToSimUnits(sender.Position);
foreach (Body body in Bodies.Values)
{
if (!body.IsStatic)
{
FarseerUserData userData = (FarseerUserData)body.UserData;
Vector2 myPosition = position - userData.TopLeftOffset + userData.Offset;
//If the position is different from the current position of the PhysicsBody then we need to
//change the actual position of the PhysicsBody.
if (Math.Abs(myPosition.X - body.Position.X) > 0.0001f ||
Math.Abs(myPosition.Y - body.Position.Y) > 0.0001f)
{
//Change the position of the PhysicsBody...
body.Position = myPosition;
}
}
}
}
}
protected void OnBodyRemoved(Body body)
{
var userData = new FarseerUserData();
if (body.UserData != null)
userData = (FarseerUserData) body.UserData;
if (bodyDictionary.ContainsKey(userData.Name))
bodyDictionary.Remove(userData.Name);
}
protected void OnBodyRemoved(Body body)
{
var userData = new FarseerUserData();
if (body.UserData != null)
{
userData = (FarseerUserData)body.UserData;
}
if (bodyDictionary.ContainsKey(userData.Name))
{
bodyDictionary.Remove(userData.Name);
}
}
public override void Update(GameTime gameTime)
{
if (Paused)
{
return;
}
//Update the position of our Parent to the current position of the PhysicsBody.
//WTo do this we'll track down the first 'Primary' body that we can find.
Body primary = null;
if (Bodies != null)
{
primary = GetPrimaryBody();
if (primary != null && (oldPosition.X != primary.Position.X || oldPosition.Y != primary.Position.Y))
{
Vector2 position = primary.Position;
FarseerUserData userData = (FarseerUserData)primary.UserData;
position += userData.TopLeftOffset;
position = ConvertUnits.ToDisplayUnits(position);
Parent.Position = position;
oldPosition = primary.Position;
Vector2 newVelocity = primary.LinearVelocity;
if (Math.Abs(primary.LinearVelocity.X) > MaxVelocity)
{
newVelocity.X = MaxVelocity;
}
if (Math.Abs(primary.LinearVelocity.Y) > MaxVelocity)
{
newVelocity.Y = MaxVelocity;
}
primary.LinearVelocity = newVelocity;
}
}
base.Update(gameTime);
}
public static Body DeserializeBody(XElement element, IPhysicsManager physicsManager, IPhysicsComponent parent)
{
Body body = null;
FarseerUserData userData = new FarseerUserData();
//Read the shape used for this body.
BodyType bodyType = BodyType.Static;
if (element.Attribute("bodyType") != null)
{
if (element.Attribute("bodyType").Value.StartsWith("d", StringComparison.InvariantCultureIgnoreCase))
{
bodyType = BodyType.Dynamic;
}
else if (element.Attribute("bodyType").Value.StartsWith("s", StringComparison.InvariantCultureIgnoreCase))
{
bodyType = BodyType.Static;
}
else if (element.Attribute("bodyType").Value.StartsWith("k", StringComparison.InvariantCultureIgnoreCase))
{
bodyType = BodyType.Kinematic;
}
}
bool primary = false;
if (element.Attribute("primary") != null)
{
bool.TryParse(element.Attribute("primary").Value, out primary);
}
Shape shape = null;
XElement shapeElement = element.Element("shape");
if (shapeElement != null && shapeElement.Attribute("type") != null)
{
if (shapeElement.Attribute("type").Value.StartsWith("b", StringComparison.InvariantCultureIgnoreCase))
{
shape = DeserializeBoxShape(shapeElement);
}
else if (shapeElement.Attribute("type").Value.StartsWith("c", StringComparison.InvariantCultureIgnoreCase))
{
shape = DeserializeCircleShape(shapeElement);
}
else if (shapeElement.Attribute("type").Value.StartsWith("p", StringComparison.InvariantCultureIgnoreCase))
{
shape = DeserializePolygonShape(shapeElement);
}
}
if (shape != null)
{
string name;
body = BodyFactory.CreateBody(physicsManager.PhysicsWorld);
body.BodyType = bodyType;
Vector2 offset = Vector2.Zero;
float friction = 0.5f, linearDamping = 5f, restitution = 0f, mass = 1f;
bool fixedRotation = false;
if (element.Element("friction") != null)
{
float.TryParse(element.Element("friction").Value, NumberStyles.Float, CultureInfo.InvariantCulture, out friction);
}
if (element.Element("linearDamping") != null)
{
float.TryParse(element.Element("linearDamping").Value, NumberStyles.Float, CultureInfo.InvariantCulture, out linearDamping);
}
if (element.Element("restitution") != null)
{
float.TryParse(element.Element("restitution").Value, NumberStyles.Float, CultureInfo.InvariantCulture, out restitution);
}
if (element.Element("mass") != null)
{
float.TryParse(element.Element("mass").Value, NumberStyles.Float, CultureInfo.InvariantCulture, out mass);
}
if (element.Element("fixedRotation") != null)
{
bool.TryParse(element.Element("fixedRotation").Value, out fixedRotation);
}
if (element.Element("offset") != null)
{
offset = offset.DeserializeOffset(element.Element("offset"));
}
body.CreateFixture(shape);
body.Friction = friction;
body.LinearDamping = linearDamping;
body.Restitution = restitution;
body.Mass = mass;
body.FixedRotation = fixedRotation;
name = element.Attribute("name") != null?element.Attribute("name").Value : body.BodyId.ToString();
userData.TopLeftOffset = ConvertUnits.GetTopLeftCorner(body.FixtureList[0], 0);
userData.Name = name;
userData.Primary = primary;
userData.Owner = parent;
userData.Offset = offset;
body.UserData = userData;
}
return(body);
}
public static Body DeserializeBody(XElement element, IPhysicsManager physicsManager, IPhysicsComponent parent)
{
Body body = null;
FarseerUserData userData = new FarseerUserData();
//Read the shape used for this body.
BodyType bodyType = BodyType.Static;
if (element.Attribute("bodyType") != null)
{
if (element.Attribute("bodyType").Value.StartsWith("d", StringComparison.InvariantCultureIgnoreCase))
bodyType = BodyType.Dynamic;
else if (element.Attribute("bodyType").Value.StartsWith("s", StringComparison.InvariantCultureIgnoreCase))
bodyType = BodyType.Static;
else if (element.Attribute("bodyType").Value.StartsWith("k", StringComparison.InvariantCultureIgnoreCase))
bodyType = BodyType.Kinematic;
}
bool primary = false;
if (element.Attribute("primary") != null)
bool.TryParse(element.Attribute("primary").Value, out primary);
Shape shape = null;
XElement shapeElement = element.Element("shape");
if (shapeElement != null && shapeElement.Attribute("type") != null)
{
if (shapeElement.Attribute("type").Value.StartsWith("b", StringComparison.InvariantCultureIgnoreCase))
shape = DeserializeBoxShape(shapeElement);
else if (shapeElement.Attribute("type").Value.StartsWith("c", StringComparison.InvariantCultureIgnoreCase))
shape = DeserializeCircleShape(shapeElement);
else if (shapeElement.Attribute("type").Value.StartsWith("p", StringComparison.InvariantCultureIgnoreCase))
shape = DeserializePolygonShape(shapeElement);
}
if (shape != null)
{
string name;
body = BodyFactory.CreateBody(physicsManager.PhysicsWorld);
body.BodyType = bodyType;
Vector2 offset = Vector2.Zero;
float friction = 0.5f, linearDamping = 5f, restitution = 0f, mass = 1f;
bool fixedRotation = false;
if (element.Element("friction") != null)
float.TryParse(element.Element("friction").Value, NumberStyles.Float, CultureInfo.InvariantCulture, out friction);
if (element.Element("linearDamping") != null)
float.TryParse(element.Element("linearDamping").Value, NumberStyles.Float, CultureInfo.InvariantCulture, out linearDamping);
if (element.Element("restitution") != null)
float.TryParse(element.Element("restitution").Value, NumberStyles.Float, CultureInfo.InvariantCulture, out restitution);
if (element.Element("mass") != null)
float.TryParse(element.Element("mass").Value, NumberStyles.Float, CultureInfo.InvariantCulture, out mass);
if (element.Element("fixedRotation") != null)
bool.TryParse(element.Element("fixedRotation").Value, out fixedRotation);
if (element.Element("offset") != null)
offset = offset.DeserializeOffset(element.Element("offset"));
body.CreateFixture(shape);
body.Friction = friction;
body.LinearDamping = linearDamping;
body.Restitution = restitution;
body.Mass = mass;
body.FixedRotation = fixedRotation;
name = element.Attribute("name") != null ? element.Attribute("name").Value : body.BodyId.ToString();
userData.TopLeftOffset = ConvertUnits.GetTopLeftCorner(body.FixtureList[0], 0);
userData.Name = name;
userData.Primary = primary;
userData.Owner = parent;
userData.Offset = offset;
body.UserData = userData;
}
return body;
}
