/*
* @brief remove a shape from body
* @param shape the shape to be removed
* @param reduceMassAndMoment if this is true, the body mass and moment will be reduced by shape. the default is true
*/
public void RemoveShape(CCPhysicsShape shape, bool reduceMassAndMoment = true)
{
if (_shapes.Exists((s) => s == shape))
{
// deduce the area, mass and moment
// area must update before mass, because the density changes depend on it.
if (reduceMassAndMoment)
{
_area -= shape.GetArea();
AddMass(-shape.GetMass());
AddMoment(-shape.GetMoment());
}
//remove
if (_world != null)
{
_world.RemoveShape(shape);
}
// set shape->_body = nullptr make the shape->setBody will not trigger the _body->removeShape function call.
shape._body = null;
shape.SetBody(null);
_shapes.Remove(shape);
}
}
/*
* @brief add a shape to body
* @param shape the shape to be added
* @param addMassAndMoment if this is true, the shape's mass and moment will be added to body. the default is true
*/
public virtual CCPhysicsShape AddShape(CCPhysicsShape shape, bool addMassAndMoment = true)
{
if (shape == null)
{
return(null);
}
// add shape to body
if (!_shapes.Exists((s) => s == shape))
{
shape.SetBody(this);
// calculate the area, mass, and desity
// area must update before mass, because the density changes depend on it.
if (addMassAndMoment)
{
_area += shape.GetArea();
AddMass(shape.GetMass());
AddMoment(shape.GetMoment());
}
if (_world != null)
{
_world.AddShape(shape);
}
_shapes.Add(shape);
if (_group != cp.NO_GROUP && shape.GetGroup() == cp.NO_GROUP)
{
shape.SetGroup(_group);
}
}
return(shape);
}
/*
* @brief remove a shape from body
* @param shape the shape to be removed
* @param reduceMassAndMoment if this is true, the body mass and moment will be reduced by shape. the default is true
*/
public void RemoveShape(CCPhysicsShape shape, bool reduceMassAndMoment = true)
{
if (_shapes.Exists((s) => s == shape))
{
// deduce the area, mass and moment
// area must update before mass, because the density changes depend on it.
if (reduceMassAndMoment)
{
_area -= shape.GetArea();
AddMass(-shape.GetMass());
AddMoment(-shape.GetMoment());
}
//remove
if (_world != null)
{
_world.RemoveShape(shape);
}
// set shape->_body = nullptr make the shape->setBody will not trigger the _body->removeShape function call.
shape._body = null;
shape.SetBody(null);
_shapes.Remove(shape);
}
}
/*
* @brief add a shape to body
* @param shape the shape to be added
* @param addMassAndMoment if this is true, the shape's mass and moment will be added to body. the default is true
*/
public virtual CCPhysicsShape AddShape(CCPhysicsShape shape, bool addMassAndMoment = true)
{
if (shape == null) return null;
// add shape to body
if (!_shapes.Exists((s) => s == shape))
{
shape.SetBody(this);
// calculate the area, mass, and desity
// area must update before mass, because the density changes depend on it.
if (addMassAndMoment)
{
_area += shape.GetArea();
AddMass(shape.GetMass());
AddMoment(shape.GetMoment());
}
if (_world != null)
{
_world.AddShape(shape);
}
_shapes.Add(shape);
if (_group != cp.NO_GROUP && shape.GetGroup() == cp.NO_GROUP)
{
shape.SetGroup(_group);
}
}
return shape;
}
