void PhysicsActor::InitPhysics(float density, float friction, float restitution, eShapeType shapeType, bool isSensor, int groupIndex, int collisionFlags, bool fixedRotation)
{
if (!theWorld.IsPhysicsSetUp())
{
std::cout << "ERROR: World physics must be initialized before Actor's." << std::endl;
return;
}
b2CircleDef circle;
b2PolygonDef box;
b2ShapeDef* shape;
if (shapeType == SHAPETYPE_BOX)
{
// The extents is just a vector of the box's half widths.
// Box2D is tuned for meters, kilograms, and seconds. (Unless you've changed its units.)
box.SetAsBox(0.5f*_size.X, 0.5f*_size.Y);
shape = &box;
}
else if (shapeType == SHAPETYPE_CIRCLE)
{
// TODO: handle ellipse?
circle.radius = 0.5f*_size.X;
shape = &circle;
}
else
{
std::cout << "ERROR: Invalid shape type given." << std::endl;
return;
}
shape->density = density;
shape->friction = friction;
shape->restitution = restitution;
shape->groupIndex = groupIndex;
shape->isSensor = isSensor;
if( collisionFlags != -1 )
{
shape->maskBits = (short)collisionFlags;
shape->categoryBits = (short)collisionFlags;
}
InitShape( shape );
b2BodyDef bd;
bd.userData = this;
bd.position.Set(_position.X, _position.Y);
bd.angle = MathUtil::ToRadians(_rotation);
bd.fixedRotation = fixedRotation;
if (MathUtil::FuzzyEquals(density, 0.0))
{
_physBody = theWorld.GetPhysicsWorld().CreateStaticBody(&bd);
}
else
{
_physBody = theWorld.GetPhysicsWorld().CreateDynamicBody(&bd);
}
_physBody->CreateShape(shape);
_physBody->SetMassFromShapes();
CustomInitPhysics();
}
void PhysicsActor::InitPhysics()
{
if (!theWorld.IsPhysicsSetUp())
{
sysLog.Log("ERROR: World physics must be initialized before Actor's.");
return;
}
b2CircleShape circle;
b2PolygonShape box;
b2Shape* shape = NULL;
if (_shapeType == SHAPETYPE_BOX)
{
// The extents is just a vector of the box's half widths.
// Box2D is tuned for meters, kilograms, and seconds. (Unless you've changed its units. [You probably shouldn't.])
box.SetAsBox(0.5f*_size.X, 0.5f*_size.Y);
shape = &box;
}
else if (_shapeType == SHAPETYPE_CIRCLE)
{
circle.m_radius = 0.5f*_size.X;
shape = &circle;
}
else
{
sysLog.Log("ERROR: Invalid shape type given.");
return;
}
b2FixtureDef fixtureDef;
fixtureDef.shape = shape;
fixtureDef.density = _density;
fixtureDef.friction = _friction;
fixtureDef.restitution = _restitution;
fixtureDef.filter.groupIndex = _groupIndex;
fixtureDef.isSensor = _isSensor;
InitShape( shape );
b2BodyDef bd;
bd.userData = this;
bd.position.Set(_position.X, _position.Y);
bd.angle = MathUtil::ToRadians(_rotation);
bd.fixedRotation = _fixedRotation;
if (MathUtil::FuzzyEquals(_density, 0.0f))
{
bd.type = b2_staticBody;
}
else
{
bd.type = b2_dynamicBody;
}
_physBody = theWorld.GetPhysicsWorld().CreateBody(&bd);
_physBody->CreateFixture(&fixtureDef);
_physBody->SetUserData(this);
CustomInitPhysics();
}
