A base class for nodes in the hierarchy that are not leaf nodes. More...

#include "eggGroupNode.h"

Inheritance diagram for EggGroupNode:

Public Types
typedef Children::const_iterator	const_iterator

typedef Children::const_pointer	const_pointer

typedef Children::const_reference	const_reference

typedef Children::const_reverse_iterator	const_reverse_iterator

typedef Children::difference_type	difference_type

typedef Children::const_iterator	iterator

typedef Children::const_pointer	pointer

typedef Children::const_reference	reference

typedef Children::const_reverse_iterator	reverse_iterator

typedef Children::size_type	size_type

enum	TriangulateFlags { T_polygon = 0x001, T_convex = 0x002, T_composite = 0x004, T_recurse = 0x008, T_flat_shaded = 0x010 }

Public Member Functions
	EggGroupNode (const std::string &name="")

	EggGroupNode (const EggGroupNode &copy)

EggNode *	add_child (EggNode *node)
	Adds the indicated child to the group and returns it. More...

void	apply_first_attribute (bool recurse)
	Sets the first vertex of the triangle (or each component) to the primitive normal and/or color, if the primitive is flat-shaded. More...

void	apply_last_attribute (bool recurse)
	Sets the last vertex of the triangle (or each component) to the primitive normal and/or color, if the primitive is flat-shaded. More...

iterator	begin () const

void	clear ()

void	clear_connected_shading ()
	Resets the connected_shading information on all primitives at this node and below, so that it may be accurately rederived by the next call to get_connected_shading(). More...

bool	empty () const

iterator	end () const

iterator	erase (iterator position)

iterator	erase (iterator first, iterator last)

EggNode *	find_child (const std::string &name) const
	Returns the child of this node whose name is the indicated string, or NULL if there is no child of this node by that name. More...

void	force_filenames (const Filename &directory)
	Similar to resolve_filenames, but each non-absolute filename encountered is arbitrarily taken to be in the indicated directory, whether or not the so- named filename exists. More...

virtual TypeHandle	force_init_type ()

void	get_connected_shading ()
	Queries the connected_shading information on all primitives at this node and below, to ensure that it has been completely filled in before we start mucking around with vertices. More...

EggNode *	get_first_child ()
	Returns the first child in the group's list of children, or NULL if the list of children is empty. More...

EggNode *	get_next_child ()
	Returns the next child in the group's list of children since the last call to get_first_child() or get_next_child(), or NULL if the last child has been returned. More...

virtual TypeHandle	get_type () const

bool	has_absolute_pathnames () const
	Returns true if any nodes at this level and below include a reference to a file via an absolute pathname, or false if all references are relative. More...

virtual bool	has_normals () const
	Returns true if any of the primitives (e.g. More...

virtual bool	has_primitives () const
	Returns true if there are any primitives (e.g. More...

iterator	insert (iterator position, PT(EggNode) x)

virtual bool	joint_has_primitives () const
	Returns true if there are any primitives (e.g. More...

void	make_point_primitives ()
	Creates PointLight primitives to reference any otherwise unreferences vertices discovered in this group or below. More...

void	mesh_triangles (int flags)
	Combine triangles together into triangle strips, at this group and below. More...

EggGroupNode &	operator= (const EggGroupNode &copy)

void	post_apply_flat_attribute (bool recurse)
	Intended as a followup to apply_last_attribute(), this also sets an attribute on the first vertices of the primitive, if they don't already have an attribute set, just so they end up with something. More...

	PT (EggNode) remove_child(EggNode *node)

reverse_iterator	rbegin () const

void	rebuild_vertex_pools (EggVertexPools &vertex_pools, unsigned int max_vertices, bool recurse)
	Copies vertices used by the primitives at this group node (and below, if recurse is true) into one or more new vertex pools, and updates the primitives to reference these pools. More...

void	recompute_polygon_normals (CoordinateSystem cs=CS_default)
	Recomputes all the polygon normals for polygon geometry at this group node and below so that they accurately reflect the vertex positions. More...

bool	recompute_tangent_binormal (const GlobPattern &uv_name)
	This function recomputes the tangent and binormal for the named texture coordinate set for all vertices at this level and below. More...

bool	recompute_tangent_binormal (const vector_string &names)
	This function recomputes the tangent and binormal for the named texture coordinate sets. More...

bool	recompute_tangent_binormal_auto ()
	This function recomputes the tangent and binormal for any texture coordinate set that affects a normal map. More...

void	recompute_vertex_normals (double threshold, CoordinateSystem cs=CS_default)
	Recomputes all the vertex normals for polygon geometry at this group node and below so that they accurately reflect the vertex positions. More...

int	remove_invalid_primitives (bool recurse)
	Removes primitives at this level and below which appear to be degenerate; e.g. More...

int	remove_unused_vertices (bool recurse)
	Removes all vertices from VertexPools within this group or below that are not referenced by at least one primitive. More...

int	rename_nodes (vector_string strip_prefix, bool recurse)
	Rename by stripping out the prefix. More...

reverse_iterator	rend () const

void	replace (iterator position, PT(EggNode) x)
	Replaces the node at the indicated position with the indicated node. More...

void	resolve_filenames (const DSearchPath &searchpath)
	Walks the tree and attempts to resolve any filenames encountered. More...

void	reverse_vertex_ordering ()
	Reverses the vertex ordering of all polygons defined at this node and below. More...

size_type	size () const

void	steal_children (EggGroupNode &other)
	Moves all the children from the other node to this one. More...

void	strip_normals ()
	Removes all normals from primitives, and the vertices they reference, at this node and below. More...

int	triangulate_polygons (int flags)
	Replace all higher-order polygons at this point in the scene graph and below with triangles. More...

void	unify_attributes (bool use_connected_shading, bool allow_per_primitive, bool recurse)
	Applies per-vertex normal and color to all vertices, if they are in fact per-vertex (and different for each vertex), or moves them to the primitive if they are all the same. More...

virtual void	write (std::ostream &out, int indent_level) const
	Writes the group and all of its children to the indicated output stream in Egg format. More...

Public Member Functions inherited from EggNode
	EggNode (const std::string &name="")

	EggNode (const EggNode &copy)

void	apply_texmats ()
	Applies the texture matrices to the UV's of the vertices that reference them, and then removes the texture matrices from the textures themselves. More...

virtual EggRenderMode *	determine_alpha_mode ()
	Walks back up the hierarchy, looking for an EggGroup or EggPrimitive or some such object at this level or above this node that has an alpha_mode other than AM_unspecified. More...

virtual EggRenderMode *	determine_bin ()
	Walks back up the hierarchy, looking for an EggGroup or EggPrimitive or some such object at this level or above this node that has a bin specified. More...

virtual bool	determine_decal ()
	Walks back up the hierarchy, looking for an EggGroup at this level or above that has the "decal" flag set. More...

virtual EggRenderMode *	determine_depth_offset ()
	Walks back up the hierarchy, looking for an EggGroup or EggPrimitive or some such object at this level or above this node that has a depth_offset specified. More...

virtual EggRenderMode *	determine_depth_test_mode ()
	Walks back up the hierarchy, looking for an EggGroup or EggPrimitive or some such object at this level or above this node that has a depth_test_mode other than DTM_unspecified. More...

virtual EggRenderMode *	determine_depth_write_mode ()
	Walks back up the hierarchy, looking for an EggGroup or EggPrimitive or some such object at this level or above this node that has a depth_write_mode other than DWM_unspecified. More...

virtual EggRenderMode *	determine_draw_order ()
	Walks back up the hierarchy, looking for an EggGroup or EggPrimitive or some such object at this level or above this node that has a draw_order specified. More...

virtual bool	determine_indexed ()
	Walks back up the hierarchy, looking for an EggGroup at this level or above that has the "indexed" scalar set. More...

virtual EggRenderMode *	determine_visibility_mode ()
	Walks back up the hierarchy, looking for an EggGroup or EggPrimitive or some such object at this level or above this node that has a visibility_mode other than VM_unspecified. More...

void	flatten_transforms ()
	Removes any transform and instance records from this node in the scene graph and below. More...

int	get_depth () const

const LMatrix4d &	get_node_frame () const
	Returns the coordinate frame of the node itself. More...

const LMatrix4d &	get_node_frame_inv () const
	Returns the inverse of the matrix returned by get_node_frame(). More...

const LMatrix4d *	get_node_frame_inv_ptr () const
	Returns either a NULL pointer or a unique pointer shared by nodes with the same get_node_frame_inv() matrix. More...

const LMatrix4d *	get_node_frame_ptr () const
	Returns either a NULL pointer or a unique pointer shared by nodes with the same get_node_frame() matrix. More...

const LMatrix4d &	get_node_to_vertex () const
	Returns the transformation matrix suitable for converting vertices in the coordinate space of the node to the appropriate coordinate space for storing in the egg file. More...

const LMatrix4d *	get_node_to_vertex_ptr () const
	Returns either a NULL pointer or a unique pointer shared by nodes with the same get_node_to_vertex() matrix. More...

EggGroupNode *	get_parent () const

const LMatrix4d &	get_vertex_frame () const
	Returns the coordinate frame of the vertices referenced by primitives at or under this node. More...

const LMatrix4d &	get_vertex_frame_inv () const
	Returns the inverse of the matrix returned by get_vertex_frame(). More...

const LMatrix4d *	get_vertex_frame_inv_ptr () const
	Returns either a NULL pointer or a unique pointer shared by nodes with the same get_vertex_frame_inv() matrix. More...

const LMatrix4d *	get_vertex_frame_ptr () const
	Returns either a NULL pointer or a unique pointer shared by nodes with the same get_vertex_frame() matrix. More...

const LMatrix4d &	get_vertex_to_node () const
	Returns the transformation matrix suitable for converting the vertices as read from the egg file into the coordinate space of the node. More...

const LMatrix4d *	get_vertex_to_node_ptr () const
	Returns either a NULL pointer or a unique pointer shared by nodes with the same get_vertex_to_node() matrix. More...

virtual bool	is_anim_matrix () const
	Returns true if this node represents a table of animation transformation data, false otherwise. More...

virtual bool	is_joint () const
	Returns true if this particular node represents a <Joint> entry or not. More...

bool	is_local_coord () const
	Returns true if this node's vertices are not in the global coordinate space. More...

bool	is_under_instance () const
	Returns true if there is an <Instance> node somewhere in the egg tree at or above this node, false otherwise. More...

bool	is_under_transform () const
	Returns true if there is a <Transform> entry somewhere in the egg tree at or above this node, false otherwise. More...

EggNode &	operator= (const EggNode &copy)

bool	parse_egg (const std::string &egg_syntax)
	Parses the egg syntax given in the indicate string as if it had been read from the egg file within this object's definition. More...

int	rename_node (vector_string strip_prefix)
	Rename by stripping out the prefix. More...

void	test_under_integrity () const

void	transform (const LMatrix4d &mat)
	Applies the indicated transformation to the node and all of its descendants. More...

void	transform_vertices_only (const LMatrix4d &mat)
	Applies the indicated transformation only to vertices that appear in global space within vertex pools at this node and below. More...

Public Member Functions inherited from EggNamedObject
	EggNamedObject (const std::string &name="")

	EggNamedObject (const EggNamedObject &copy)

EggNamedObject &	operator= (const EggNamedObject &copy)

void	output (std::ostream &out) const

void	write_header (std::ostream &out, int indent_level, const char *egg_keyword) const
	Writes the first line of the egg object, e.g. More...

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

virtual EggTransform *	as_transform ()
	Returns this object cross-cast to an EggTransform pointer, if it inherits from EggTransform, or NULL if it does not. More...

void	clear_user_data ()
	Removes all user data pointers from the node. More...

void	clear_user_data (TypeHandle type)
	Removes the user data pointer of the indicated type. More...

EggUserData *	get_user_data () const
	Returns the user data pointer most recently stored on this object, or NULL if nothing was previously stored. More...

EggUserData *	get_user_data (TypeHandle type) const
	Returns the user data pointer of the indicated type, if it exists, or NULL if it does not. More...

bool	has_user_data () const
	Returns true if a generic user data pointer has recently been set and not yet cleared, false otherwise. More...

bool	has_user_data (TypeHandle type) const
	Returns true if the user data pointer of the indicated type has been set, false otherwise. More...

EggObject &	operator= (const EggObject &copy)

void	set_user_data (EggUserData *user_data)
	Sets the user data associated with this object. 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...

Public Member Functions inherited from Namable
	Namable (const std::string &initial_name="")

void	clear_name ()
	Resets the Namable's name to empty. More...

const std::string &	get_name () const

bool	has_name () const
	Returns true if the Namable has a nonempty name set, false if the name is empty. More...

void	output (std::ostream &out) const
	Outputs the Namable. More...

void	set_name (const std::string &name)

Static Public Member Functions
static TypeHandle	get_class_type ()

static void	init_type ()

static bool	is_right (const LVector2d &v1, const LVector2d &v2)
	Returns true if the 2-d v1 is to the right of v2. More...

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

static void	init_type ()

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

static void	init_type ()

Static Public Member Functions inherited from EggObject
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 ()

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

static void	init_type ()

Public Attributes
	get_children

Public Attributes inherited from EggNode
	get_depth
	Returns the number of nodes above this node in the egg hierarchy. More...

	get_parent

Public Attributes inherited from TypedObject
	get_type

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

Public Attributes inherited from Namable
	get_name

	set_name

Friends
class	EggMaterialCollection

class	EggTextureCollection

Detailed Description

A base class for nodes in the hierarchy that are not leaf nodes.

(See also EggGroup, which is specifically the "<Group>" node in egg.)

An EggGroupNode is an STL-style container of pointers to EggNodes, like a vector. Functions push_back()/pop_back() and insert()/erase() are provided to manipulate the list. The list may also be operated on (read-only) via iterators and begin()/end().

Definition at line 46 of file eggGroupNode.h.

Member Function Documentation

◆ add_child()

EggNode * EggGroupNode::add_child ( EggNode * node )

Adds the indicated child to the group and returns it.

If the child node is already a child of some other node, removes it first.

Definition at line 243 of file eggGroupNode.cxx.

References ReferenceCount::test_ref_count_integrity().

Referenced by EggXfmSAnim::add_component_data(), XFileAnimationSet::create_hierarchy(), EggXfmSAnim::EggXfmSAnim(), and XFileMesh::set_egg_parent().

◆ apply_first_attribute()

void EggGroupNode::apply_first_attribute ( bool recurse )

Sets the first vertex of the triangle (or each component) to the primitive normal and/or color, if the primitive is flat-shaded.

This reflects the DirectX convention of storing flat-shaded properties on the first vertex, although it is not usually a convention in Egg.

This may create redundant vertices in the vertex pool, so it may be a good idea to follow this up with remove_unused_vertices().

Definition at line 1039 of file eggGroupNode.cxx.

References TypedObject::is_of_type().

◆ apply_last_attribute()

void EggGroupNode::apply_last_attribute ( bool recurse )

Sets the last vertex of the triangle (or each component) to the primitive normal and/or color, if the primitive is flat-shaded.

This reflects the OpenGL convention of storing flat-shaded properties on the last vertex, although it is not usually a convention in Egg.

This may create redundant vertices in the vertex pool, so it may be a good idea to follow this up with remove_unused_vertices().

Definition at line 1013 of file eggGroupNode.cxx.

References TypedObject::is_of_type().

◆ clear_connected_shading()

void EggGroupNode::clear_connected_shading ( )

Resets the connected_shading information on all primitives at this node and below, so that it may be accurately rederived by the next call to get_connected_shading().

It may be a good idea to call remove_unused_vertices() as well, to establish the correct connectivity between common vertices.

Definition at line 917 of file eggGroupNode.cxx.

References TypedObject::is_of_type().

◆ find_child()

EggNode * EggGroupNode::find_child ( const std::string & name ) const

Returns the child of this node whose name is the indicated string, or NULL if there is no child of this node by that name.

Does not search recursively.

Definition at line 296 of file eggGroupNode.cxx.

Referenced by EggXfmSAnim::add_component_data().

◆ force_filenames()

void EggGroupNode::force_filenames ( const Filename & directory )

Similar to resolve_filenames, but each non-absolute filename encountered is arbitrarily taken to be in the indicated directory, whether or not the so- named filename exists.

Definition at line 406 of file eggGroupNode.cxx.

References TypedObject::is_of_type().

◆ get_connected_shading()

void EggGroupNode::get_connected_shading ( )

Queries the connected_shading information on all primitives at this node and below, to ensure that it has been completely filled in before we start mucking around with vertices.

Definition at line 937 of file eggGroupNode.cxx.

References TypedObject::is_of_type().

◆ get_first_child()

EggNode * EggGroupNode::get_first_child ( )

Returns the first child in the group's list of children, or NULL if the list of children is empty.

Can be used with get_next_child() to return the complete list of children without using the iterator class; however, this is non-thread-safe, and so is not recommended except for languages other than C++ which cannot use the iterators.

Definition at line 215 of file eggGroupNode.cxx.

References get_next_child().

◆ get_next_child()

EggNode * EggGroupNode::get_next_child ( )

Returns the next child in the group's list of children since the last call to get_first_child() or get_next_child(), or NULL if the last child has been returned.

Can be used with get_first_child() to return the complete list of children without using the iterator class; however, this is non- thread-safe, and so is not recommended except for languages other than C++ which cannot use the iterators.

It is an error to call this without previously calling get_first_child().

Definition at line 231 of file eggGroupNode.cxx.

Referenced by get_first_child().

◆ has_absolute_pathnames()

bool EggGroupNode::has_absolute_pathnames ( ) const

Returns true if any nodes at this level and below include a reference to a file via an absolute pathname, or false if all references are relative.

Definition at line 313 of file eggGroupNode.cxx.

References TypedObject::is_of_type().

◆ has_normals()

bool EggGroupNode::has_normals ( ) const

virtual

Returns true if any of the primitives (e.g.

polygons) defined within this group or below have either face or vertex normals defined, false otherwise.

Reimplemented from EggNode.

Definition at line 1122 of file eggGroupNode.cxx.

◆ has_primitives()

bool EggGroupNode::has_primitives ( ) const

virtual

Returns true if there are any primitives (e.g.

polygons) defined within this group or below, false otherwise.

Reimplemented from EggNode.

Definition at line 1082 of file eggGroupNode.cxx.

◆ is_right()

bool EggGroupNode::is_right	(	const LVector2d &	v1,
		const LVector2d &	v2
	)

inlinestatic

Returns true if the 2-d v1 is to the right of v2.

Definition at line 18 of file eggGroupNode.I.

◆ joint_has_primitives()

bool EggGroupNode::joint_has_primitives ( ) const

virtual

Returns true if there are any primitives (e.g.

polygons) defined within this group or below, but the search does not include nested joints.

Reimplemented from EggNode.

Definition at line 1100 of file eggGroupNode.cxx.

References EggNode::is_joint().

◆ make_point_primitives()

void EggGroupNode::make_point_primitives ( )

Creates PointLight primitives to reference any otherwise unreferences vertices discovered in this group or below.

Definition at line 771 of file eggGroupNode.cxx.

◆ mesh_triangles()

void EggGroupNode::mesh_triangles ( int flags )

Combine triangles together into triangle strips, at this group and below.

Definition at line 751 of file eggGroupNode.cxx.

References EggMesher::mesh().

◆ post_apply_flat_attribute()

void EggGroupNode::post_apply_flat_attribute ( bool recurse )

Intended as a followup to apply_last_attribute(), this also sets an attribute on the first vertices of the primitive, if they don't already have an attribute set, just so they end up with *something*.

Definition at line 1061 of file eggGroupNode.cxx.

References TypedObject::is_of_type().

◆ rebuild_vertex_pools()

void EggGroupNode::rebuild_vertex_pools	(	EggVertexPools &	vertex_pools,
		unsigned int	max_vertices,
		bool	recurse
	)

Copies vertices used by the primitives at this group node (and below, if recurse is true) into one or more new vertex pools, and updates the primitives to reference these pools.

It is up to the caller to parent the newly-created vertex pools somewhere appropriate in the egg hierarchy.

No more than max_vertices will be placed into any one vertex pool. This is the sole criteria for splitting vertex pools.

Definition at line 1145 of file eggGroupNode.cxx.

References TypedObject::is_of_type().

◆ recompute_polygon_normals()

void EggGroupNode::recompute_polygon_normals ( CoordinateSystem cs = CS_default )

Recomputes all the polygon normals for polygon geometry at this group node and below so that they accurately reflect the vertex positions.

Normals are removed from the vertices and defined only on polygons, giving the geometry a faceted appearance.

This function also removes degenerate polygons that do not have enough vertices to define a normal. It does not affect normals for other kinds of primitives like Nurbs or Points.

This function does not remove or adjust vertices in the vertex pool; it only adds new vertices with the normals removed. Thus, it is a good idea to call remove_unused_vertices() after calling this.

Definition at line 541 of file eggGroupNode.cxx.

Referenced by EggData::recompute_polygon_normals().

◆ recompute_tangent_binormal() [1/2]

bool EggGroupNode::recompute_tangent_binormal ( const GlobPattern & uv_name )

This function recomputes the tangent and binormal for the named texture coordinate set for all vertices at this level and below.

Use the empty string for the default texture coordinate set.

It is necessary for each vertex to already have a normal (or at least a polygon normal), as well as a texture coordinate in the named texture coordinate set, before calling this function. You might precede this with recompute_vertex_normals() to ensure that the normals exist.

Like recompute_vertex_normals(), this function does not remove or adjust vertices in the vertex pool; it only adds new vertices with the new tangents and binormals computed. Thus, it is a good idea to call remove_unused_vertices() after calling this.

Definition at line 639 of file eggGroupNode.cxx.

Referenced by recompute_tangent_binormal_auto().

◆ recompute_tangent_binormal() [2/2]

bool EggGroupNode::recompute_tangent_binormal ( const vector_string & names )

This function recomputes the tangent and binormal for the named texture coordinate sets.

Returns true if anything was done.

Definition at line 662 of file eggGroupNode.cxx.

◆ recompute_tangent_binormal_auto()

bool EggGroupNode::recompute_tangent_binormal_auto ( )

This function recomputes the tangent and binormal for any texture coordinate set that affects a normal map.

Returns true if anything was done.

Definition at line 683 of file eggGroupNode.cxx.

References EggTextureCollection::find_used_textures(), EggTexture::get_uv_name, and recompute_tangent_binormal().

◆ recompute_vertex_normals()

void EggGroupNode::recompute_vertex_normals	(	double	threshold,
		CoordinateSystem	cs = `CS_default`
	)

Recomputes all the vertex normals for polygon geometry at this group node and below so that they accurately reflect the vertex positions.

A shared edge between two polygons (even in different groups) is considered smooth if the angle between the two edges is less than threshold degrees.

This function also removes degenerate polygons that do not have enough vertices to define a normal. It does not affect normals for other kinds of primitives like Nurbs or Points.

This function does not remove or adjust vertices in the vertex pool; it only adds new vertices with the correct normals. Thus, it is a good idea to call remove_unused_vertices() after calling this.

Definition at line 475 of file eggGroupNode.cxx.

Referenced by EggData::recompute_vertex_normals().

◆ remove_invalid_primitives()

int EggGroupNode::remove_invalid_primitives ( bool recurse )

Removes primitives at this level and below which appear to be degenerate; e.g.

polygons with fewer than 3 vertices, etc. Returns the number of primitives removed.

Definition at line 879 of file eggGroupNode.cxx.

References TypedObject::is_of_type().

◆ remove_unused_vertices()

int EggGroupNode::remove_unused_vertices ( bool recurse )

Removes all vertices from VertexPools within this group or below that are not referenced by at least one primitive.

Also collapses together equivalent vertices, and renumbers all vertices after the operation so their indices are consecutive, beginning at zero. Returns the total number of vertices removed.

Note that this operates on the VertexPools within this group level, without respect to primitives that reference these vertices (unlike other functions like strip_normals()). It is therefore most useful to call this on the EggData root, rather than on a subgroup within the hierarchy, since a VertexPool may appear anywhere in the hierarchy.

Definition at line 841 of file eggGroupNode.cxx.

References TypedObject::is_of_type().

◆ rename_nodes()

int EggGroupNode::rename_nodes	(	vector_string	strip_prefix,
		bool	recurse
	)

Rename by stripping out the prefix.

Definition at line 800 of file eggGroupNode.cxx.

◆ replace()

void EggGroupNode::replace	(	iterator	position,
		PT(EggNode)	x
	)

Replaces the node at the indicated position with the indicated node.

It is an error to call this with an invalid position iterator (e.g. end()).

Definition at line 175 of file eggGroupNode.cxx.

◆ resolve_filenames()

void EggGroupNode::resolve_filenames ( const DSearchPath & searchpath )

Walks the tree and attempts to resolve any filenames encountered.

This looks up filenames along the specified search path; it does not automatically search the model_path for missing files.

Definition at line 368 of file eggGroupNode.cxx.

◆ reverse_vertex_ordering()

void EggGroupNode::reverse_vertex_ordering ( )

Reverses the vertex ordering of all polygons defined at this node and below.

Does not change the surface normals, if any.

Definition at line 444 of file eggGroupNode.cxx.

References TypedObject::is_of_type().

◆ steal_children()

void EggGroupNode::steal_children ( EggGroupNode & other )

Moves all the children from the other node to this one.

This is especially useful because the group node copy assignment operator does not copy children.

Definition at line 278 of file eggGroupNode.cxx.

Referenced by EggJointNodePointer::do_finish_reparent().

◆ strip_normals()

void EggGroupNode::strip_normals ( )

Removes all normals from primitives, and the vertices they reference, at this node and below.

This function does not remove or adjust vertices in the vertex pool; it only adds new vertices with the normal removed. Thus, it is a good idea to call remove_unused_vertices() after calling this.

Definition at line 592 of file eggGroupNode.cxx.

References TypedObject::is_of_type().

Referenced by EggData::strip_normals().

◆ triangulate_polygons()

int EggGroupNode::triangulate_polygons ( int flags )

Replace all higher-order polygons at this point in the scene graph and below with triangles.

Returns the total number of new triangles produced, less degenerate polygons removed.

If flags contains T_polygon and T_convex, both concave and convex polygons will be subdivided into triangles; with only T_polygon, only concave polygons will be subdivided, and convex polygons will be largely unchanged.

Definition at line 713 of file eggGroupNode.cxx.

References TypedObject::is_of_type().

◆ unify_attributes()

void EggGroupNode::unify_attributes	(	bool	use_connected_shading,
		bool	allow_per_primitive,
		bool	recurse
	)

Applies per-vertex normal and color to all vertices, if they are in fact per-vertex (and different for each vertex), or moves them to the primitive if they are all the same.

After this call, either the primitive will have normals or its vertices will, but not both. Ditto for colors.

If use_connected_shading is true, each polygon is considered in conjunction with all connected polygons; otherwise, each polygon is considered individually.

If allow_per_primitive is false, S_per_face or S_overall will treated like S_per_vertex: normals and colors will always be assigned to the vertices. In this case, there will never be per-primitive colors or normals after this call returns. On the other hand, if allow_per_primitive is true, then S_per_face means that normals and colors should be assigned to the primitives, and removed from the vertices, as described above.

This may create redundant vertices in the vertex pool, so it may be a good idea to follow this up with remove_unused_vertices().

Definition at line 974 of file eggGroupNode.cxx.

References TypedObject::is_of_type().

◆ write()

void EggGroupNode::write	(	std::ostream &	out,
		int	indent_level
	)		const

virtual

Writes the group and all of its children to the indicated output stream in Egg format.

Implements EggNode.

Reimplemented in EggGroup, EggXfmSAnim, and EggTable.

Definition at line 84 of file eggGroupNode.cxx.

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

panda/src/egg/eggGroupNode.h
panda/src/egg/eggGroupNode.cxx
panda/src/egg/eggGroupNode.I

Public Types

Public Member Functions

Static Public Member Functions

Public Attributes

Friends

Detailed Description

Member Function Documentation

◆ add_child()

◆ apply_first_attribute()

◆ apply_last_attribute()

◆ clear_connected_shading()

◆ find_child()

◆ force_filenames()

◆ get_connected_shading()

◆ get_first_child()

◆ get_next_child()

◆ has_absolute_pathnames()

◆ has_normals()

◆ has_primitives()

◆ is_right()

◆ joint_has_primitives()

◆ make_point_primitives()

◆ mesh_triangles()

◆ post_apply_flat_attribute()

◆ rebuild_vertex_pools()

◆ recompute_polygon_normals()

◆ recompute_tangent_binormal() [1/2]

◆ recompute_tangent_binormal() [2/2]

◆ recompute_tangent_binormal_auto()

◆ recompute_vertex_normals()

◆ remove_invalid_primitives()

◆ remove_unused_vertices()

◆ rename_nodes()

◆ replace()

◆ resolve_filenames()

◆ reverse_vertex_ordering()

◆ steal_children()

◆ strip_normals()

◆ triangulate_polygons()

◆ unify_attributes()

◆ write()