CullTraverserData Class Reference

This collects together the pieces of data that are accumulated for each node while walking the scene graph during the cull traversal. More...

#include "cullTraverserData.h"

Public Member Functions
	CullTraverserData (const NodePath &start, const TransformState *net_transform, const RenderState *state, GeometricBoundingVolume *view_frustum, Thread *current_thread)
	CullTraverserData (const CullTraverserData &parent, PandaNode *child)
	This constructor creates a CullTraverserData object that reflects the next node down in the traversal. More...
void	apply_transform (const TransformState *node_transform)
	Applies the indicated transform changes onto the current data. More...
void	apply_transform_and_state (CullTraverser *trav)
	Applies the transform and state from the current node onto the current data. More...
	CPT (TransformState) get_modelview_transform(const CullTraverser *trav) const
	CPT (TransformState) get_internal_transform(const CullTraverser *trav) const
	CPT (TransformState) _net_transform
	CPT (RenderState) _state
	CPT (CullPlanes) _cull_planes
const TransformState *	get_net_transform (const CullTraverser *trav) const
NodePath	get_node_path () const
bool	is_in_view (const DrawMask &camera_mask)
bool	is_this_node_hidden (const DrawMask &camera_mask) const
	Returns true if this particular node is hidden, even though we might be traversing past this node to find a child node that has had show_through() called for it. More...
PandaNode *	node () const
	Returns the node traversed to so far. More...
PandaNodePipelineReader *	node_reader ()
	Returns the PipelineReader for the node traversed to so far. More...
const PandaNodePipelineReader *	node_reader () const
	Returns the PipelineReader for the node traversed to so far. More...
	PT (GeometricBoundingVolume) _view_frustum

Public Attributes
DrawMask	_draw_mask
PandaNodePipelineReader	_node_reader
int	_portal_depth
	get_node_path
	Constructs and returns an actual NodePath that represents the same path we have just traversed. More...

Detailed Description

This collects together the pieces of data that are accumulated for each node while walking the scene graph during the cull traversal.

Having this as a separate object simplifies the parameter list to CullTraverser::r_traverse(), as well as to other functions like PandaNode::cull_callback(). It also makes it easier to add cull parameters, and provides a place to abstract out some of the cull behavior (like view-frustum culling).

Definition at line 40 of file cullTraverserData.h.

Constructor & Destructor Documentation

CullTraverserData()

CullTraverserData::CullTraverserData ( const CullTraverserData &  parent, PandaNode *  child  )

inline

This constructor creates a CullTraverserData object that reflects the next node down in the traversal.

Definition at line 43 of file cullTraverserData.I.

Member Function Documentation

apply_transform()

void CullTraverserData::apply_transform

(

const TransformState *

node_transform

)

Applies the indicated transform changes onto the current data.

Definition at line 78 of file cullTraverserData.cxx.

References TransformState::is_identity(), and TransformState::is_singular().

Referenced by apply_transform_and_state().

apply_transform_and_state()

void CullTraverserData::apply_transform_and_state

(

CullTraverser *

trav

)

Applies the transform and state from the current node onto the current data.

This also evaluates billboards, etc.

Definition at line 35 of file cullTraverserData.cxx.

References apply_transform(), PandaNodePipelineReader::check_cached(), PandaNodePipelineReader::compose_draw_mask(), RenderEffects::cull_callback(), SceneSetup::get_camera_node(), PandaNodePipelineReader::get_effects(), CullTraverser::get_scene(), PandaNodePipelineReader::get_state(), PandaNodePipelineReader::get_tag(), CullTraverser::get_tag_state_key(), PandaNodePipelineReader::get_transform(), RenderEffects::has_cull_callback(), PandaNodePipelineReader::has_tag(), and CullTraverser::has_tag_state_key().

is_this_node_hidden()

bool CullTraverserData::is_this_node_hidden ( const DrawMask &  camera_mask ) const

inline

Returns true if this particular node is hidden, even though we might be traversing past this node to find a child node that has had show_through() called for it.

If this returns true, the node should not be rendered.

Definition at line 160 of file cullTraverserData.I.

node()

PandaNode * CullTraverserData::node ( ) const

inline

Returns the node traversed to so far.

Definition at line 66 of file cullTraverserData.I.

Referenced by NodeCullCallbackData::upcall().

node_reader() [1/2]

PandaNodePipelineReader * CullTraverserData::node_reader ( )

inline

Returns the PipelineReader for the node traversed to so far.

Definition at line 74 of file cullTraverserData.I.

node_reader() [2/2]

const PandaNodePipelineReader * CullTraverserData::node_reader ( ) const

inline

Returns the PipelineReader for the node traversed to so far.

Definition at line 82 of file cullTraverserData.I.

Member Data Documentation

get_node_path

NodePath CullTraverserData::get_node_path

inline

Constructs and returns an actual NodePath that represents the same path we have just traversed.

Definition at line 70 of file cullTraverserData.h.

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The documentation for this class was generated from the following files:

• panda/src/pgraph/cullTraverserData.h
• panda/src/pgraph/cullTraverserData.cxx
• panda/src/pgraph/cullTraverserData.I