A box shaped region used to define a force field. More...

#include "physxBoxForceFieldShape.h"

Inheritance diagram for PhysxBoxForceFieldShape:

Public Member Functions
virtual TypeHandle	force_init_type ()

LVector3f	get_dimensions () const
	Retrieves the dimensions of the box. More...

virtual TypeHandle	get_type () const

void	link (NxForceFieldShape *shapePtr)

NxForceFieldShape *	ptr () const

void	save_to_desc (PhysxBoxForceFieldShapeDesc &shapeDesc) const
	Saves the state of the shape object to a descriptor. More...

void	set_dimensions (const LVector3f &dimensions)
	Sets the box dimensions. More...

void	unlink ()

Public Member Functions inherited from PhysxForceFieldShape
PhysxForceField *	get_force_field () const
	Returns the owning force field if this is a shape of an include group, else NULL will be returned. More...

LMatrix4f	get_mat () const
	Returns the force field shape's transform. More...

const char *	get_name () const
	Returns the name string. More...

LPoint3f	get_pos () const
	Returns the force field shape's translation. More...

PhysxForceFieldShapeGroup *	get_shape_group () const
	Returns the owning force field shape group. More...

void	ls () const

void	ls (std::ostream &out, int indent_level=0) const

void	release ()

void	set_mat (const LMatrix4f &mat)
	Sets the force field shape's transform. More...

void	set_name (const char *name)
	Sets a name string for this object. More...

void	set_pos (const LPoint3f &pos)
	Sets the force field shape's translation. More...

Public Member Functions inherited from TypedReferenceCount
	TypedReferenceCount (const TypedReferenceCount &copy)

void	operator= (const TypedReferenceCount &copy)

Public Member Functions inherited from TypedObject
	TypedObject (const TypedObject &copy)=default

TypedObject *	as_typed_object ()
	Returns the object, upcast (if necessary) to a TypedObject pointer. More...

const TypedObject *	as_typed_object () const
	Returns the object, upcast (if necessary) to a TypedObject pointer. More...

int	get_best_parent_from_Set (const std::set< int > &) const

int	get_type_index () const
	Returns the internal index number associated with this object's TypeHandle, a unique number for each different type. More...

bool	is_exact_type (TypeHandle handle) const
	Returns true if the current object is the indicated type exactly. More...

bool	is_of_type (TypeHandle handle) const
	Returns true if the current object is or derives from the indicated type. More...

TypedObject &	operator= (const TypedObject &copy)=default

Public Member Functions inherited from ReferenceCount
int	get_ref_count () const

WeakReferenceList *	get_weak_list () const
	Returns the WeakReferenceList associated with this ReferenceCount object. More...

bool	has_weak_list () const
	Returns true if this particular ReferenceCount object has a WeakReferenceList created, false otherwise. More...

void	local_object ()
	This function should be called, once, immediately after creating a new instance of some ReferenceCount-derived object on the stack. More...

void	ref () const
	Explicitly increments the reference count. More...

bool	ref_if_nonzero () const
	Atomically increases the reference count of this object if it is not zero. More...

bool	test_ref_count_integrity () const
	Does some easy checks to make sure that the reference count isn't completely bogus. More...

bool	test_ref_count_nonzero () const
	Does some easy checks to make sure that the reference count isn't zero, or completely bogus. More...

virtual bool	unref () const
	Explicitly decrements the reference count. More...

WeakReferenceList *	weak_ref ()
	Adds the indicated PointerToVoid as a weak reference to this object. More...

void	weak_unref ()
	Removes the indicated PointerToVoid as a weak reference to this object. More...

Static Public Member Functions
static TypeHandle	get_class_type ()

static void	init_type ()

Static Public Member Functions inherited from PhysxForceFieldShape
static PhysxForceFieldShape *	factory (NxShapeType shapeType)

static TypeHandle	get_class_type ()

static void	init_type ()

Static Public Member Functions inherited from PhysxObject
static TypeHandle	get_class_type ()

static void	init_type ()

Static Public Member Functions inherited from TypedReferenceCount
static TypeHandle	get_class_type ()

static void	init_type ()

Static Public Member Functions inherited from TypedObject
static TypeHandle	get_class_type ()

static void	init_type ()
	This function is declared non-inline to work around a compiler bug in g++ 2.96. More...

Static Public Member Functions inherited from ReferenceCount
static TypeHandle	get_class_type ()

static void	init_type ()

Additional Inherited Members
Public Types inherited from PhysxEnums
enum	PhysxActorFlag { AF_disable_collision = NX_AF_DISABLE_COLLISION, AF_disable_response = NX_AF_DISABLE_RESPONSE, AF_lock_com = NX_AF_LOCK_COM, AF_fluid_disable_collision = NX_AF_FLUID_DISABLE_COLLISION, AF_contact_modification = NX_AF_CONTACT_MODIFICATION, AF_force_cone_friction = NX_AF_FORCE_CONE_FRICTION, AF_user_actor_pair_filtering = NX_AF_USER_ACTOR_PAIR_FILTERING }

enum	PhysxBodyFlag { BF_disable_gravity = NX_BF_DISABLE_GRAVITY, Bf_frozen_pos_x = NX_BF_FROZEN_POS_X, BF_frozen_pos_y = NX_BF_FROZEN_POS_Y, BF_frozen_pos_z = NX_BF_FROZEN_POS_Z, BF_frozen_rot_x = NX_BF_FROZEN_ROT_X, BF_frozen_rot_y = NX_BF_FROZEN_ROT_Y, BF_frozen_rot_z = NX_BF_FROZEN_ROT_Z, BF_frozen_pos = NX_BF_FROZEN_POS, BF_frozen_rot = NX_BF_FROZEN_ROT, BF_frozen = NX_BF_FROZEN, BF_kinematic = NX_BF_KINEMATIC, BF_visualization = NX_BF_VISUALIZATION, BF_filter_sleep_vel = NX_BF_FILTER_SLEEP_VEL, BF_energy_sleep_test = NX_BF_ENERGY_SLEEP_TEST }

enum	PhysxBroadPhaseType { BPT_sap_single = NX_BP_TYPE_SAP_SINGLE, BPT_sap_multi = NX_BP_TYPE_SAP_MULTI }

enum	PhysxClothFlag { CLF_pressure = NX_CLF_PRESSURE, CLF_static = NX_CLF_STATIC, CLF_disable_collision = NX_CLF_DISABLE_COLLISION, CLF_selfcollision = NX_CLF_SELFCOLLISION, CLF_visualization = NX_CLF_VISUALIZATION, CLF_gravity = NX_CLF_GRAVITY, CLF_bending = NX_CLF_BENDING, CLF_bending_ortho = NX_CLF_BENDING_ORTHO, CLF_damping = NX_CLF_DAMPING, CLF_collision_twoway = NX_CLF_COLLISION_TWOWAY, CLF_triangle_collision = NX_CLF_TRIANGLE_COLLISION, CLF_tearable = NX_CLF_TEARABLE, CLF_hardware = NX_CLF_HARDWARE, CLF_comdamping = NX_CLF_COMDAMPING, CLF_validbounds = NX_CLF_VALIDBOUNDS, CLF_fluid_collision = NX_CLF_FLUID_COLLISION, CLF_disable_dynamic_ccd = NX_CLF_DISABLE_DYNAMIC_CCD, CLF_adhere = NX_CLF_ADHERE }

enum	PhysxCombineMode { CM_average = NX_CM_AVERAGE, CM_min = NX_CM_MIN, CM_multiply = NX_CM_MULTIPLY, CM_max = NX_CM_MAX }

enum	PhysxContactPairFlag { CPF_ignore_pair = NX_IGNORE_PAIR, CPF_notify_on_start_touch = NX_NOTIFY_ON_START_TOUCH, CPF_notify_on_end_touch = NX_NOTIFY_ON_END_TOUCH, CPF_notify_on_touch = NX_NOTIFY_ON_TOUCH, CPF_notify_on_impact = NX_NOTIFY_ON_IMPACT, CPF_notify_on_roll = NX_NOTIFY_ON_ROLL, CPF_notify_on_slide = NX_NOTIFY_ON_SLIDE, CPF_notify_forces = NX_NOTIFY_FORCES, CPF_notify_on_start_touch_threshold = NX_NOTIFY_ON_START_TOUCH_FORCE_THRESHOLD, CPF_notify_on_end_touch_threshold = NX_NOTIFY_ON_END_TOUCH_FORCE_THRESHOLD, CPF_notify_on_touch_threshold = NX_NOTIFY_ON_TOUCH_FORCE_THRESHOLD, CPF_notify_contact_modifications = NX_NOTIFY_CONTACT_MODIFICATION }

enum	PhysxD6JointDriveType { D6_joint_drive_position = NX_D6JOINT_DRIVE_POSITION, D6_joint_drive_velocity = NX_D6JOINT_DRIVE_VELOCITY }

enum	PhysxD6JointFlag { D6_joint_slerp_drive = NX_D6JOINT_SLERP_DRIVE, D6_joint_gear_disabled = NX_D6JOINT_GEAR_ENABLED }

enum	PhysxD6JointMotion { D6_joint_motion_locked = NX_D6JOINT_MOTION_LOCKED, D6_joint_motion_limited = NX_D6JOINT_MOTION_LIMITED, D6_joint_motion_free = NX_D6JOINT_MOTION_FREE }

enum	PhysxDistanceJointFlag { DJF_max_distance_enabled = NX_DJF_MAX_DISTANCE_ENABLED, DJF_mix_distance_enabled = NX_DJF_MIN_DISTANCE_ENABLED, DJF_spring_enabled = NX_DJF_SPRING_ENABLED }

enum	PhysxFilterOp { FO_and = NX_FILTEROP_AND, FO_or = NX_FILTEROP_OR, FO_xor = NX_FILTEROP_XOR, FO_nand = NX_FILTEROP_NAND, FO_nor = NX_FILTEROP_NOR, FO_nxor = NX_FILTEROP_NXOR, FO_swap_and = NX_FILTEROP_SWAP_AND }

enum	PhysxForceFieldCoordinates { FFC_cartesian, FFC_spherical, FFC_cylindrical, FFC_toroidal }

enum	PhysxForceFieldShapeGroupFlag { FFSG_exclude_group = NX_FFSG_EXCLUDE_GROUP }

enum	PhysxForceMode { FM_force = NX_FORCE, FM_impulse = NX_IMPULSE, FM_velocity_change = NX_VELOCITY_CHANGE, FM_smooth_impulse = NX_SMOOTH_IMPULSE, FM_smooth_velocity_change = NX_SMOOTH_VELOCITY_CHANGE, FM_acceleration = NX_ACCELERATION }

enum	PhysxJointFlag { JF_collision_enabled = NX_JF_COLLISION_ENABLED, JF_visualization = NX_JF_VISUALIZATION }

enum	PhysxMaterialFlag { MF_anisotropic = NX_MF_ANISOTROPIC, MF_disable_friction = NX_MF_DISABLE_FRICTION, MF_disable_strong_friction = NX_MF_DISABLE_STRONG_FRICTION }

enum	PhysxParameter { P_penalty_force = NX_PENALTY_FORCE, P_skin_width = NX_SKIN_WIDTH, P_default_sleep_lin_vel_squared = NX_DEFAULT_SLEEP_LIN_VEL_SQUARED, P_default_sleep_ang_vel_squared = NX_DEFAULT_SLEEP_ANG_VEL_SQUARED, P_bounce_threshold = NX_BOUNCE_THRESHOLD, P_dyn_frict_scaling = NX_DYN_FRICT_SCALING, P_sta_frict_scaling = NX_STA_FRICT_SCALING, P_max_angular_velocity = NX_MAX_ANGULAR_VELOCITY, P_continuous_cd = NX_CONTINUOUS_CD, P_visualization_scale = NX_VISUALIZATION_SCALE, P_adaptive_force = NX_ADAPTIVE_FORCE, P_coll_veta_jointed = NX_COLL_VETO_JOINTED, P_trigger_trigger_callback = NX_TRIGGER_TRIGGER_CALLBACK, P_select_hw_algo = NX_SELECT_HW_ALGO, P_ccd_epsilon = NX_CCD_EPSILON, P_solver_convergence_threshold = NX_SOLVER_CONVERGENCE_THRESHOLD, P_bbox_noise_level = NX_BBOX_NOISE_LEVEL, P_implicit_sweep_cache_size = NX_IMPLICIT_SWEEP_CACHE_SIZE, P_default_sleep_energy = NX_DEFAULT_SLEEP_ENERGY, P_constant_fluid_max_packets = NX_CONSTANT_FLUID_MAX_PACKETS, P_constant_fluid_max_particles_per_step = NX_CONSTANT_FLUID_MAX_PARTICLES_PER_STEP, P_asynchronous_mesh_creation = NX_ASYNCHRONOUS_MESH_CREATION, P_force_field_custom_kernel_epsilon = NX_FORCE_FIELD_CUSTOM_KERNEL_EPSILON, P_improved_spring_solver = NX_IMPROVED_SPRING_SOLVER, P_visualize_world_axes = NX_VISUALIZE_WORLD_AXES, P_visualize_body_axes = NX_VISUALIZE_BODY_AXES, P_visualize_body_mass_axes = NX_VISUALIZE_BODY_MASS_AXES, P_visualize_body_lin_velocity = NX_VISUALIZE_BODY_LIN_VELOCITY, P_visualize_body_ang_velocity = NX_VISUALIZE_BODY_ANG_VELOCITY, P_visualize_body_joint_groups = NX_VISUALIZE_BODY_JOINT_GROUPS, P_visualize_joint_local_axes = NX_VISUALIZE_JOINT_LOCAL_AXES, P_visualize_joint_world_axes = NX_VISUALIZE_JOINT_WORLD_AXES, P_visualize_joint_limits = NX_VISUALIZE_JOINT_LIMITS, P_visualize_contact_point = NX_VISUALIZE_CONTACT_POINT, P_visualize_contact_normal = NX_VISUALIZE_CONTACT_NORMAL, P_visualize_contact_error = NX_VISUALIZE_CONTACT_ERROR, P_visualize_contact_force = NX_VISUALIZE_CONTACT_FORCE, P_visualize_actor_axes = NX_VISUALIZE_ACTOR_AXES, P_visualize_collision_aabbs = NX_VISUALIZE_COLLISION_AABBS, P_visualize_collision_shapes = NX_VISUALIZE_COLLISION_SHAPES, P_visualize_collision_axes = NX_VISUALIZE_COLLISION_AXES, P_visualize_collision_compounds = NX_VISUALIZE_COLLISION_COMPOUNDS, P_visualize_collision_vnormals = NX_VISUALIZE_COLLISION_VNORMALS, P_visualize_collision_fnormals = NX_VISUALIZE_COLLISION_FNORMALS, P_visualize_collision_edges = NX_VISUALIZE_COLLISION_EDGES, P_visualize_collision_spheres = NX_VISUALIZE_COLLISION_SPHERES, P_visualize_collision_static = NX_VISUALIZE_COLLISION_STATIC, P_visualize_collision_dynamic = NX_VISUALIZE_COLLISION_DYNAMIC, P_visualize_collision_free = NX_VISUALIZE_COLLISION_FREE, P_visualize_collision_ccd = NX_VISUALIZE_COLLISION_CCD, P_visualize_collision_skeletons = NX_VISUALIZE_COLLISION_SKELETONS, P_visualize_fluid_emitters = NX_VISUALIZE_FLUID_EMITTERS, P_visualize_fluid_position = NX_VISUALIZE_FLUID_POSITION, P_visualize_fluid_velocity = NX_VISUALIZE_FLUID_VELOCITY, P_visualize_fluid_kernel_radius = NX_VISUALIZE_FLUID_KERNEL_RADIUS, P_visualize_fluid_bounds = NX_VISUALIZE_FLUID_BOUNDS, P_visualize_fluid_packets = NX_VISUALIZE_FLUID_PACKETS, P_visualize_fluid_motion_limit = NX_VISUALIZE_FLUID_MOTION_LIMIT, P_visualize_fluid_dyn_collision = NX_VISUALIZE_FLUID_DYN_COLLISION, P_visualize_fluid_stc_collision = NX_VISUALIZE_FLUID_STC_COLLISION, P_visualize_fluid_mesh_packets = NX_VISUALIZE_FLUID_MESH_PACKETS, P_visualize_fluid_drains = NX_VISUALIZE_FLUID_DRAINS, P_visualize_fluid_packet_data = NX_VISUALIZE_FLUID_PACKET_DATA, P_visualize_cloth_mesh = NX_VISUALIZE_CLOTH_MESH, P_visualize_cloth_collisions = NX_VISUALIZE_CLOTH_COLLISIONS, P_visualize_cloth_selfcollisions = NX_VISUALIZE_CLOTH_SELFCOLLISIONS, P_visualize_cloth_workpackets = NX_VISUALIZE_CLOTH_WORKPACKETS, P_visualize_cloth_sleep = NX_VISUALIZE_CLOTH_SLEEP, P_visualize_cloth_sleep_vertex = NX_VISUALIZE_CLOTH_SLEEP_VERTEX, P_visualize_cloth_tearable_vertices = NX_VISUALIZE_CLOTH_TEARABLE_VERTICES, P_visualize_cloth_tearing = NX_VISUALIZE_CLOTH_TEARING, P_visualize_cloth_attachment = NX_VISUALIZE_CLOTH_ATTACHMENT, P_visualize_cloth_validbounds = NX_VISUALIZE_CLOTH_VALIDBOUNDS, P_visualize_softbody_mesh = NX_VISUALIZE_SOFTBODY_MESH, P_visualize_softbody_collisions = NX_VISUALIZE_SOFTBODY_COLLISIONS, P_visualize_softbody_workpackets = NX_VISUALIZE_SOFTBODY_WORKPACKETS, P_visualize_softbody_sleep = NX_VISUALIZE_SOFTBODY_SLEEP, P_visualize_softbody_sleep_vertex = NX_VISUALIZE_SOFTBODY_SLEEP_VERTEX, P_visualize_softbody_tearable_vertices = NX_VISUALIZE_SOFTBODY_TEARABLE_VERTICES, P_visualize_softbody_tearing = NX_VISUALIZE_SOFTBODY_TEARING, P_visualize_softbody_attachment = NX_VISUALIZE_SOFTBODY_ATTACHMENT, P_visualize_softbody_validbounds = NX_VISUALIZE_SOFTBODY_VALIDBOUNDS, P_visualize_active_vertices = NX_VISUALIZE_ACTIVE_VERTICES, P_visualize_force_fields = NX_VISUALIZE_FORCE_FIELDS }

enum	PhysxProjectionMode { PM_none = NX_JPM_NONE, PM_point_mindist = NX_JPM_POINT_MINDIST, PM_linear_mindist = NX_JPM_LINEAR_MINDIST }

enum	PhysxPruningStructure { PS_none = NX_PRUNING_NONE, PS_octree = NX_PRUNING_OCTREE, PS_quadtree = NX_PRUNING_QUADTREE, PS_dynamic_aabb_tree = NX_PRUNING_DYNAMIC_AABB_TREE, PS_static_aabb_tree = NX_PRUNING_STATIC_AABB_TREE }

enum	PhysxPulleyJointFlag { PJF_is_rigid = NX_PJF_IS_RIGID, PJF_motor_enabled = NX_PJF_MOTOR_ENABLED }

enum	PhysxRevoluteJointFlag { RJF_limit_enabled = NX_RJF_LIMIT_ENABLED, RJF_motor_enabled = NX_RJF_MOTOR_ENABLED, RJF_spring_enabled = NX_RJF_SPRING_ENABLED }

enum	PhysxSceneFlag { SF_disable_sse = NX_SF_DISABLE_SSE, SF_disable_collisions = NX_SF_DISABLE_COLLISIONS, SF_restricted_scene = NX_SF_RESTRICTED_SCENE, SF_disable_scene_mutex = NX_SF_DISABLE_SCENE_MUTEX, SF_force_cone_friction = NX_SF_FORCE_CONE_FRICTION, SF_sequential_primary = NX_SF_SEQUENTIAL_PRIMARY, SF_fluid_performance_hint = NX_SF_FLUID_PERFORMANCE_HINT }

enum	PhysxShapeFlag { SF_trigger_on_enter = NX_TRIGGER_ON_ENTER, SF_trigger_on_leave = NX_TRIGGER_ON_LEAVE, SF_trigger_on_stay = NX_TRIGGER_ON_STAY, SF_trigger_enable = NX_TRIGGER_ENABLE, SF_visualization = NX_SF_VISUALIZATION, SF_disable_collision = NX_SF_DISABLE_COLLISION, SF_disable_raycasting = NX_SF_DISABLE_RAYCASTING, SF_disable_response = NX_SF_DISABLE_RESPONSE, SF_disable_scene_queries = NX_SF_DISABLE_SCENE_QUERIES, SF_point_contact_force = NX_SF_POINT_CONTACT_FORCE, SF_feature_indices = NX_SF_FEATURE_INDICES, SF_dynamic_dynamic_ccd = NX_SF_DYNAMIC_DYNAMIC_CCD, SF_fluid_drain = NX_SF_FLUID_DRAIN, SF_fluid_disable_collision = NX_SF_FLUID_DISABLE_COLLISION, SF_fluid_twoway = NX_SF_FLUID_TWOWAY, SF_cloth_drain = NX_SF_CLOTH_DRAIN, SF_cloth_disable_collision = NX_SF_CLOTH_DISABLE_COLLISION, SF_cloth_twoway = NX_SF_CLOTH_TWOWAY, SF_softbody_drain = NX_SF_SOFTBODY_DRAIN, SF_softbody_disable_collision = NX_SF_SOFTBODY_DISABLE_COLLISION, SF_softbody_twoway = NX_SF_SOFTBODY_TWOWAY }

enum	PhysxShapesType { ST_static = NX_STATIC_SHAPES, ST_dynamic = NX_DYNAMIC_SHAPES, ST_all = NX_ALL_SHAPES }

enum	PhysxSoftBodyFlag { SBF_static = NX_SBF_STATIC, SBF_disable_collision = NX_SBF_DISABLE_COLLISION, SBF_selfcollision = NX_SBF_SELFCOLLISION, SBF_visualization = NX_SBF_VISUALIZATION, SBF_gravity = NX_SBF_GRAVITY, SBF_volume_conservtion = NX_SBF_VOLUME_CONSERVATION, SBF_damping = NX_SBF_DAMPING, SBF_collision_twoway = NX_SBF_COLLISION_TWOWAY, SBF_tearable = NX_SBF_TEARABLE, SBF_hardware = NX_SBF_HARDWARE, SBF_comdamping = NX_SBF_COMDAMPING, SBF_validbounds = NX_SBF_VALIDBOUNDS, SBF_fluid_collision = NX_SBF_FLUID_COLLISION, SBF_disable_dynamic_ccd = NX_SBF_DISABLE_DYNAMIC_CCD, SBF_adhere = NX_SBF_ADHERE }

enum	PhysxSphericalJointFlag { SJF_twist_limit_enabled = NX_SJF_TWIST_LIMIT_ENABLED, SJF_swing_limit_enabled = NX_SJF_SWING_LIMIT_ENABLED, SJF_twist_spring_enabled = NX_SJF_TWIST_SPRING_ENABLED, SJF_swing_spring_enabled = NX_SJF_SWING_SPRING_ENABLED, SJF_joint_spring_enabled = NX_SJF_JOINT_SPRING_ENABLED, SJF_perpendicular_dir_constraints = NX_SJF_PERPENDICULAR_DIR_CONSTRAINTS }

enum	PhysxUpAxis { X_up = NX_X, Y_up = NX_Y, Z_up = NX_Z }

enum	PhysxVertexAttachmentStatus { VAS_none = NX_CLOTH_VERTEX_ATTACHMENT_NONE, VAS_global = NX_CLOTH_VERTEX_ATTACHMENT_GLOBAL, VAS_shape = NX_CLOTH_VERTEX_ATTACHMENT_SHAPE }

enum	PhysxWheelFlag { WF_steerable_input = 1<<0, WF_steerable_auto = 1<<1, WF_affected_by_handbrake = 1<<2, WF_accelerated = 1<<3 }

enum	PhysxWheelShapeFlag { WSF_wheel_axis_contact_normal = NX_WF_WHEEL_AXIS_CONTACT_NORMAL, WSF_input_lat_slipvelocity = NX_WF_INPUT_LAT_SLIPVELOCITY, WSF_input_lng_slipvelocity = NX_WF_INPUT_LNG_SLIPVELOCITY, WSF_unscaled_spring_behavior = NX_WF_UNSCALED_SPRING_BEHAVIOR, WSF_axle_speed_override = NX_WF_AXLE_SPEED_OVERRIDE, WSF_emulate_legacy_wheel = NX_WF_EMULATE_LEGACY_WHEEL, WSF_clamped_friction = NX_WF_CLAMPED_FRICTION }

Public Attributes inherited from TypedObject
	get_type

Public Attributes inherited from ReferenceCount
	get_ref_count
	Returns the current reference count. More...