Node* SceneReplication::CreateControllableObject()
{
ResourceCache* cache = GetSubsystem<ResourceCache>();
// Create the scene node & visual representation. This will be a replicated object
Node* ballNode = scene_->CreateChild("Ball");
ballNode->SetPosition(Vector3(Random(40.0f) - 20.0f, 5.0f, Random(40.0f) - 20.0f));
ballNode->SetScale(0.5f);
StaticModel* ballObject = ballNode->CreateComponent<StaticModel>();
ballObject->SetModel(cache->GetResource<Model>("Models/Sphere.mdl"));
ballObject->SetMaterial(cache->GetResource<Material>("Materials/StoneSmall.xml"));
// Create the physics components
RigidBody* body = ballNode->CreateComponent<RigidBody>();
body->SetMass(1.0f);
body->SetFriction(1.0f);
// In addition to friction, use motion damping so that the ball can not accelerate limitlessly
body->SetLinearDamping(0.5f);
body->SetAngularDamping(0.5f);
CollisionShape* shape = ballNode->CreateComponent<CollisionShape>();
shape->SetSphere(1.0f);
// Create a random colored point light at the ball so that can see better where is going
Light* light = ballNode->CreateComponent<Light>();
light->SetRange(3.0f);
light->SetColor(Color(0.5f + (Rand() & 1) * 0.5f, 0.5f + (Rand() & 1) * 0.5f, 0.5f + (Rand() & 1) * 0.5f));
return ballNode;
}
void CreateRagdoll::CreateRagdollBone(const String& boneName, ShapeType type, const Vector3& size, const Vector3& position,
const Quaternion& rotation)
{
// Find the correct child scene node recursively
Node* boneNode = node_->GetChild(boneName, true);
if (!boneNode)
{
URHO3D_LOGWARNING("Could not find bone " + boneName + " for creating ragdoll physics components");
return;
}
RigidBody* body = boneNode->CreateComponent<RigidBody>();
// Set mass to make movable
body->SetMass(1.0f);
// Set damping parameters to smooth out the motion
body->SetLinearDamping(0.05f);
body->SetAngularDamping(0.85f);
// Set rest thresholds to ensure the ragdoll rigid bodies come to rest to not consume CPU endlessly
body->SetLinearRestThreshold(1.5f);
body->SetAngularRestThreshold(2.5f);
CollisionShape* shape = boneNode->CreateComponent<CollisionShape>();
// We use either a box or a capsule shape for all of the bones
if (type == SHAPE_BOX)
shape->SetBox(size, position, rotation);
else
shape->SetCapsule(size.x_, size.y_, position, rotation);
}
void Vehicle::InitWheel(const String& name, const Vector3& offset, WeakPtr<Node>& wheelNode, unsigned& wheelNodeID)
{
ResourceCache* cache = GetSubsystem<ResourceCache>();
// Note: do not parent the wheel to the hull scene node. Instead create it on the root level and let the physics
// constraint keep it together
wheelNode = GetScene()->CreateChild(name);
wheelNode->SetPosition(node_->LocalToWorld(offset));
wheelNode->SetRotation(node_->GetRotation() * (offset.x_ >= 0.0 ? Quaternion(0.0f, 0.0f, -90.0f) :
Quaternion(0.0f, 0.0f, 90.0f)));
wheelNode->SetScale(Vector3(0.8f, 0.5f, 0.8f));
// Remember the ID for serialization
wheelNodeID = wheelNode->GetID();
StaticModel* wheelObject = wheelNode->CreateComponent<StaticModel>();
RigidBody* wheelBody = wheelNode->CreateComponent<RigidBody>();
CollisionShape* wheelShape = wheelNode->CreateComponent<CollisionShape>();
Constraint* wheelConstraint = wheelNode->CreateComponent<Constraint>();
wheelObject->SetModel(cache->GetResource<Model>("Models/Cylinder.mdl"));
wheelObject->SetMaterial(cache->GetResource<Material>("Materials/Stone.xml"));
wheelObject->SetCastShadows(true);
wheelShape->SetSphere(1.0f);
wheelBody->SetFriction(1.0f);
wheelBody->SetMass(1.0f);
wheelBody->SetLinearDamping(0.2f); // Some air resistance
wheelBody->SetAngularDamping(0.75f); // Could also use rolling friction
wheelBody->SetCollisionLayer(1);
wheelConstraint->SetConstraintType(CONSTRAINT_HINGE);
wheelConstraint->SetOtherBody(GetComponent<RigidBody>()); // Connect to the hull body
wheelConstraint->SetWorldPosition(wheelNode->GetPosition()); // Set constraint's both ends at wheel's location
wheelConstraint->SetAxis(Vector3::UP); // Wheel rotates around its local Y-axis
wheelConstraint->SetOtherAxis(offset.x_ >= 0.0 ? Vector3::RIGHT : Vector3::LEFT); // Wheel's hull axis points either left or right
wheelConstraint->SetLowLimit(Vector2(-180.0f, 0.0f)); // Let the wheel rotate freely around the axis
wheelConstraint->SetHighLimit(Vector2(180.0f, 0.0f));
wheelConstraint->SetDisableCollision(true); // Let the wheel intersect the vehicle hull
}