void hctConvertToPhantomActionFilter::process( hkRootLevelContainer& data )
{
// Find and hkxScene and a hkPhysics Data objects in the root level container
hkxScene* scenePtr = reinterpret_cast<hkxScene*>( data.findObjectByType( hkxSceneClass.getName() ) );
if (scenePtr == HK_NULL || (scenePtr->m_rootNode == HK_NULL) )
{
HK_WARN_ALWAYS(0xabbaa5f0, "No scene data (or scene data root hkxNode) found. Can't continue.");
return;
}
hkpPhysicsData* physicsPtr = reinterpret_cast<hkpPhysicsData*>( data.findObjectByType( hkpPhysicsDataClass.getName() ) );
if (physicsPtr == HK_NULL)
{
HK_WARN_ALWAYS(0xabbaa3d0, "No physics data found, you need to use Create Rigid Bodies before this filter or have bodies already in the input data.");
return;
}
// Keep track of how many phantoms we created so we can reported
int numConverted = 0;
// Search for rigid bodies in the scene
for (int psi=0; psi<physicsPtr->getPhysicsSystems().getSize(); psi++)
{
const hkpPhysicsSystem* psystem = physicsPtr->getPhysicsSystems()[psi];
for (int rbi=0; rbi<psystem->getRigidBodies().getSize(); rbi++)
{
hkpRigidBody* rbody = psystem->getRigidBodies()[rbi];
const char* rbName = rbody->getName();
// Require an associated node in the scene
hkxNode* rbNode = (rbName)? scenePtr->findNodeByName(rbName): HK_NULL;
if( !rbNode )
{
continue;
}
// Require an 'hkPhantomAction' attribute group
const hkxAttributeGroup* attrGroup = rbNode->findAttributeGroupByName("hkPhantomAction");
if (!attrGroup)
{
continue;
}
// Create our phantom shape
MyPhantomShape* myPhantomShape = new MyPhantomShape();
{
// Set action type (required)
const char* actionTypeStr = HK_NULL;
attrGroup->getStringValue( "action", true, actionTypeStr );
if( actionTypeStr )
{
if( hkString::strCasecmp( actionTypeStr, "wind" ) == 0 )
{
myPhantomShape->m_actionType = MyPhantomShape::ACTION_WIND;
}
else if( hkString::strCasecmp( actionTypeStr, "attract" ) == 0 )
{
myPhantomShape->m_actionType = MyPhantomShape::ACTION_ATTRACT;
}
else if( hkString::strCasecmp( actionTypeStr, "deflect" ) == 0 )
{
myPhantomShape->m_actionType = MyPhantomShape::ACTION_DEFLECT;
}
else
{
HK_WARN_ALWAYS(0xabbad3b4, "Unknow action type ("<<actionTypeStr<<").");
}
}
else
{
HK_WARN_ALWAYS(0xabba9834, "Can't fine \"action\" attribute");
}
// Set other attributes (optional)
attrGroup->getVectorValue( "direction", false, myPhantomShape->m_direction );
attrGroup->getFloatValue( "strength", false, myPhantomShape->m_strength );
// Useful warnings
if ((myPhantomShape->m_actionType == MyPhantomShape::ACTION_WIND) && (myPhantomShape->m_direction.lengthSquared3()==0.0f))
{
HK_WARN_ALWAYS(0xabbadf82, "Wind direction is invalid - action will have no effect");
}
if (myPhantomShape->m_strength==0.0f)
{
HK_WARN_ALWAYS(0xabbacc83, "Strength is 0 - action will have no effect");
}
}
// Set the phantom as a new bounding shape for the body
{
const hkpShape* oldShape = rbody->getCollidable()->getShape();
hkpBvShape* bvShape = new hkpBvShape( oldShape, myPhantomShape );
myPhantomShape->removeReference();
rbody->setShape( bvShape );
bvShape->removeReference();
}
// Remove meshes if the user chose to do so
if (m_options.m_removeMeshes && (hkString::strCmp(rbNode->m_object.getClass()->getName(), "hkxMesh")==0) )
{
rbNode->m_object = HK_NULL;
}
HK_REPORT("Converted rigid body \""<<rbName<<"\" to phantom action");
numConverted++;
}
}
// Give a warning if the filter didn't do anything useful
if (numConverted==0)
{
HK_WARN_ALWAYS(0xabba7632, "No rigid bodies converted to phantom action.");
}
else
{
HK_REPORT("Converted "<<numConverted<<" rigid bodies.");
}
}
PhantomEventsDemo::PhantomEventsDemo( hkDemoEnvironment* env )
: hkDefaultPhysicsDemo(env, DEMO_FLAGS_NO_SERIALIZE)
{
//
// Setup the camera
//
{
hkVector4 from(13.0f, 10.0f, 13.0f);
hkVector4 to (0.0f, 0.0f, 0.0f);
hkVector4 up (0.0f, 1.0f, 0.0f);
setupDefaultCameras( env, from, to, up );
}
//
// Create the world
//
{
hkpWorldCinfo info;
info.setupSolverInfo(hkpWorldCinfo::SOLVER_TYPE_4ITERS_MEDIUM);
info.setBroadPhaseWorldSize( 100.0f );
info.m_enableDeactivation = false;
m_world = new hkpWorld( info );
m_world->lock();
setupGraphics();
}
//
// Register the collision agents
//
{
hkpAgentRegisterUtil::registerAllAgents( m_world->getCollisionDispatcher() );
}
// In this demo we have three different objects; the wall, the sphere and a phantom volume. Both the wall, which is simply a box,
// and the sphere are created in the usual manner using a hkpRigidBodyCinfo 'blueprint' and are added to the world.
//
// Create the wall box
//
{
hkpRigidBodyCinfo info;
hkVector4 fixedBoxSize( 0.5f, 5.0f , 5.0f );
hkpBoxShape* fixedBoxShape = new hkpBoxShape( fixedBoxSize , 0 );
info.m_shape = fixedBoxShape;
info.m_motionType = hkpMotion::MOTION_FIXED;
info.m_position.set(-2.0f, 0.0f ,0.0f);
// Add some bounce.
info.m_restitution = 0.9f;
// Create fixed box
hkpRigidBody* floor = new hkpRigidBody(info);
m_world->addEntity(floor);
floor->removeReference();
fixedBoxShape->removeReference();
}
//
// Create a moving sphere
//
{
hkReal radius = 0.5f;
hkpConvexShape* sphereShape = new hkpSphereShape(radius);
// To illustrate using the shape, create a rigid body.
hkpRigidBodyCinfo sphereInfo;
sphereInfo.m_shape = sphereShape;
sphereInfo.m_position.set(2.0f, 0.0f, 0.0f);
sphereInfo.m_restitution = 0.9f;
sphereInfo.m_motionType = hkpMotion::MOTION_SPHERE_INERTIA;
// If we need to compute mass properties, we'll do this using the hkpInertiaTensorComputer.
if (sphereInfo.m_motionType != hkpMotion::MOTION_FIXED)
{
sphereInfo.m_mass = 10.0f;
hkpMassProperties massProperties;
hkpInertiaTensorComputer::computeSphereVolumeMassProperties(radius, sphereInfo.m_mass, massProperties);
sphereInfo.m_inertiaTensor = massProperties.m_inertiaTensor;
sphereInfo.m_centerOfMass = massProperties.m_centerOfMass;
sphereInfo.m_mass = massProperties.m_mass;
}
// Create a rigid body (using the template above)
hkpRigidBody* sphereRigidBody = new hkpRigidBody(sphereInfo);
// Remove reference since the body now "owns" the Shape
sphereShape->removeReference();
// Finally add body so we can see it, and remove reference since the world now "owns" it.
m_world->addEntity(sphereRigidBody);
sphereRigidBody->removeReference();
}
// Given below is the construction code for the phantom volume:
//
// Create a PHANTOM floor
//
{
hkpRigidBodyCinfo boxInfo;
hkVector4 boxSize( 4.0f, 1.5f , 2.0f );
hkpShape* boxShape = new hkpBoxShape( boxSize , 0 );
boxInfo.m_motionType = hkpMotion::MOTION_FIXED;
boxInfo.m_position.set(2.0f, -4.0f, 0.0f);
MyPhantomShape* myPhantomShape = new MyPhantomShape();
hkpBvShape* bvShape = new hkpBvShape( boxShape, myPhantomShape );
boxShape->removeReference();
myPhantomShape->removeReference();
boxInfo.m_shape = bvShape;
hkpRigidBody* boxRigidBody = new hkpRigidBody( boxInfo );
bvShape->removeReference();
m_world->addEntity( boxRigidBody );
// the color can only be changed after the entity has been added to the world
HK_SET_OBJECT_COLOR((hkUlong)boxRigidBody->getCollidable(), hkColor::rgbFromChars(255, 255, 255, 50));
boxRigidBody->removeReference();
}
// The phantom volume is created using a hkpBvShape using a hkpBoxShape as the bounding volume and a
// hkpPhantomCallbackShape as the child shape. The volume is set to be fixed in space and coloured with a slight alpha blend.
//
// Once the simulation starts the ball drops into the phantom volume, upon notification of this event we colour the ball
// RED and wait for an exit event. As soon as this event is raised we colour the ball GREEN and apply an impulse upwards
// back towards the wall and the simulation repeats.
m_world->unlock();
}