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

#include "eggGroupNode.h"

Inheritance diagram for EggGroupNode:
EggNode EggNamedObject EggObject Namable TypedReferenceCount TypedObject ReferenceCount MemoryBase MemoryBase EggData EggGroup EggTable EggXfmSAnim EggBin

List of all members.

Classes

class  NVertexReference
class  TBNVertexReference
class  TBNVertexValue

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 string &name="")
 EggGroupNode (const EggGroupNode &copy)
EggNodeadd_child (EggNode *node)
 Adds the indicated child to the group and returns it.
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.
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.
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().
bool empty () const
iterator end () const
iterator erase (iterator position)
iterator erase (iterator first, iterator last)
EggNodefind_child (const 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.
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.
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.
EggNodeget_first_child ()
 Returns the first child in the group's list of children, or NULL if the list of children is empty.
EggNodeget_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.
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.
virtual bool has_normals () const
 Returns true if any of the primitives (e.g.
virtual bool has_primitives () const
 Returns true if there are any primitives (e.g.
iterator insert (iterator position, PT(EggNode) x)
virtual bool joint_has_primitives () const
 Returns true if there are any primitives (e.g.
void mesh_triangles (int flags)
 Combine triangles together into triangle strips, at this group and below.
EggGroupNodeoperator= (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*.
 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.
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.
bool recompute_tangent_binormal (const vector_string &names)
 This function recomputes the tangent and binormal for the named texture coordinate sets.
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.
bool recompute_tangent_binormal_auto ()
 This function recomputes the tangent and binormal for any texture coordinate set that affects a normal map.
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.
int remove_invalid_primitives (bool recurse)
 Removes primitives at this level and below which appear to be degenerate; e.g.
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.
int rename_nodes (vector_string strip_prefix, bool recurse)
 Rename by stripping out the prefix.
reverse_iterator rend () const
void replace (iterator position, PT(EggNode) x)
 Replaces the node at the indicated position with the indicated node.
void resolve_filenames (const DSearchPath &searchpath)
 Walks the tree and attempts to resolve any filenames encountered.
void reverse_vertex_ordering ()
 Reverses the vertex ordering of all polygons defined at this node and below.
size_type size () const
void steal_children (EggGroupNode &other)
 Moves all the children from the other node to this one.
void strip_normals ()
 Removes all normals from primitives, and the vertices they reference, at this node and below.
int triangulate_polygons (int flags)
 Replace all higher-order polygons at this point in the scene graph and below with triangles.
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.
virtual void write (ostream &out, int indent_level) const
 Writes the group and all of its children to the indicated output stream in Egg format.

Static Public Member Functions

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

Protected Member Functions

CoordinateSystem find_coordsys_entry ()
 Walks the tree, looking for an EggCoordinateSystem entry.
int find_materials (EggMaterialCollection *collection)
 Walks the tree, looking for EggMaterials.
int find_textures (EggTextureCollection *collection)
 Walks the tree, looking for EggTextures.
virtual void r_apply_texmats (EggTextureCollection &textures)
 The recursive implementation of apply_texmats().
virtual void r_flatten_transforms ()
 The recursive implementation of flatten_transforms().
bool r_load_externals (const DSearchPath &searchpath, CoordinateSystem coordsys, BamCacheRecord *record)
 Walks the tree and locates unloaded external reference nodes, which it attempts to locate and load in.
virtual void r_mark_coordsys (CoordinateSystem cs)
 This is only called immediately after loading an egg file from disk, to propagate the value found in the CoordinateSystem entry (or the default Y-up coordinate system) to all nodes that care about what the coordinate system is.
virtual void r_transform (const LMatrix4d &mat, const LMatrix4d &inv, CoordinateSystem to_cs)
 This is called from within the egg code by transform().
virtual void r_transform_vertices (const LMatrix4d &mat)
 This is called from within the egg code by transform_vertices_only()().
virtual void update_under (int depth_offset)
 This function is called from within EggGroupNode whenever the parentage of the node has changed.

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 51 of file eggGroupNode.h.


Member Function Documentation

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 1139 of file eggGroupNode.cxx.

References EggPrimitive::apply_first_attribute(), and TypedObject::is_of_type().

Referenced by EggLoader::make_polyset().

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 1108 of file eggGroupNode.cxx.

References EggPrimitive::apply_last_attribute(), and TypedObject::is_of_type().

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 995 of file eggGroupNode.cxx.

References EggPrimitive::clear_connected_shading(), and TypedObject::is_of_type().

EggNode * EggGroupNode::find_child ( const 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 342 of file eggGroupNode.cxx.

Referenced by EggXfmSAnim::add_component_data(), EggXfmSAnim::add_data(), SoftNodeDesc::make_vertex_offsets(), and EggXfmSAnim::set_value().

CoordinateSystem EggGroupNode::find_coordsys_entry ( ) [protected]

Walks the tree, looking for an EggCoordinateSystem entry.

If one is found, extracts it and returns its value. If multiple entries are found, extracts all of them and returns CS_invalid if they disagree.

Definition at line 1517 of file eggGroupNode.cxx.

References TypedObject::is_of_type().

int EggGroupNode::find_materials ( EggMaterialCollection collection) [protected]

Walks the tree, looking for EggMaterials.

Each EggMaterial that is found is removed from the hierarchy and added to the EggMaterialCollection. Returns the number of EggMaterials found.

Definition at line 1621 of file eggGroupNode.cxx.

References EggMaterialCollection::add_material(), and TypedObject::is_of_type().

Referenced by EggMaterialCollection::extract_materials().

int EggGroupNode::find_textures ( EggTextureCollection collection) [protected]

Walks the tree, looking for EggTextures.

Each EggTexture that is found is removed from the hierarchy and added to the EggTextureCollection. Returns the number of EggTextures found.

Definition at line 1575 of file eggGroupNode.cxx.

References EggTextureCollection::add_texture(), and TypedObject::is_of_type().

Referenced by EggTextureCollection::extract_textures().

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 461 of file eggGroupNode.cxx.

References EggTexture::get_alpha_filename(), EggFilenameNode::get_filename(), EggTexture::has_alpha_filename(), Filename::is_local(), TypedObject::is_of_type(), and EggTexture::set_alpha_filename().

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 1018 of file eggGroupNode.cxx.

References EggPrimitive::get_connected_shading(), and TypedObject::is_of_type().

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 246 of file eggGroupNode.cxx.

References 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 267 of file eggGroupNode.cxx.

Referenced by get_first_child().

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 362 of file eggGroupNode.cxx.

References EggTexture::get_alpha_filename(), EggFilenameNode::get_filename(), EggTexture::has_alpha_filename(), Filename::is_local(), and TypedObject::is_of_type().

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 1234 of file eggGroupNode.cxx.

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 1188 of file eggGroupNode.cxx.

static void EggGroupNode::init_type ( ) [inline, static]

This function is declared non-inline to work around a compiler bug in g++ 2.96.

Making it inline seems to cause problems in the optimizer.

Reimplemented from EggNode.

Reimplemented in EggBin, EggData, EggGroup, EggTable, and EggXfmSAnim.

Definition at line 240 of file eggGroupNode.h.

References EggNode::init_type().

Referenced by EggXfmSAnim::init_type(), EggTable::init_type(), EggGroup::init_type(), and EggData::init_type().

bool EggGroupNode::is_right ( const LVector2d v1,
const LVector2d v2 
) [inline, static]

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

Definition at line 22 of file eggGroupNode.I.

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 1209 of file eggGroupNode.cxx.

References EggNode::is_joint(), and EggNode::joint_has_primitives().

void EggGroupNode::mesh_triangles ( int  flags)

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

Definition at line 844 of file eggGroupNode.cxx.

References EggMesher::mesh(), and mesh_triangles().

Referenced by EggLoader::make_polyset(), and mesh_triangles().

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 1164 of file eggGroupNode.cxx.

References TypedObject::is_of_type(), and EggPrimitive::post_apply_flat_attribute().

Referenced by EggLoader::make_polyset().

void EggGroupNode::r_apply_texmats ( EggTextureCollection textures) [protected, virtual]

The recursive implementation of apply_texmats().

Reimplemented from EggNode.

Definition at line 1499 of file eggGroupNode.cxx.

void EggGroupNode::r_flatten_transforms ( ) [protected, virtual]

The recursive implementation of flatten_transforms().

Reimplemented from EggNode.

Reimplemented in EggGroup.

Definition at line 1484 of file eggGroupNode.cxx.

bool EggGroupNode::r_load_externals ( const DSearchPath searchpath,
CoordinateSystem  coordsys,
BamCacheRecord record 
) [protected]

Walks the tree and locates unloaded external reference nodes, which it attempts to locate and load in.

The reference node is replaced with the entire subtree loaded. This is intended to be called from EggData::load_externals().

Definition at line 1668 of file eggGroupNode.cxx.

References BamCacheRecord::add_dependent_file(), Filename::get_basename_wo_extension(), TypedObject::is_of_type(), EggData::load_externals(), r_load_externals(), EggData::read(), replace(), EggData::resolve_egg_filename(), EggData::set_auto_resolve_externals(), EggData::set_coordinate_system(), and steal_children().

Referenced by EggData::load_externals(), and r_load_externals().

void EggGroupNode::r_mark_coordsys ( CoordinateSystem  cs) [protected, virtual]

This is only called immediately after loading an egg file from disk, to propagate the value found in the CoordinateSystem entry (or the default Y-up coordinate system) to all nodes that care about what the coordinate system is.

Reimplemented from EggNode.

Reimplemented in EggXfmSAnim.

Definition at line 1469 of file eggGroupNode.cxx.

void EggGroupNode::r_transform ( const LMatrix4d mat,
const LMatrix4d inv,
CoordinateSystem  to_cs 
) [protected, virtual]

This is called from within the egg code by transform().

It applies a transformation matrix to the current node in some sensible way, then continues down the tree.

The first matrix is the transformation to apply; the second is its inverse. The third parameter is the coordinate system we are changing to, or CS_default if we are not changing coordinate systems.

Reimplemented from EggNode.

Reimplemented in EggGroup, EggTable, and EggXfmSAnim.

Definition at line 1430 of file eggGroupNode.cxx.

Referenced by EggData::set_coordinate_system().

void EggGroupNode::r_transform_vertices ( const LMatrix4d mat) [protected, virtual]

This is called from within the egg code by transform_vertices_only()().

It applies a transformation matrix to the current node in some sensible way (if the current node is a vertex pool with vertices), then continues down the tree.

Reimplemented from EggNode.

Definition at line 1450 of file eggGroupNode.cxx.

Referenced by EggData::set_coordinate_system().

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 1262 of file eggGroupNode.cxx.

References EggPrimitive::add_vertex(), EggPrimitive::clear(), EggVertex::copy_grefs_from(), EggVertexPool::create_unique_vertex(), EggVertexPool::find_matching_vertex(), EggCompositePrimitive::get_component(), EggCompositePrimitive::get_num_components(), TypedObject::is_of_type(), EggCompositePrimitive::set_component(), and EggVertexPool::size().

Referenced by EggLoader::make_polyset().

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 612 of file eggGroupNode.cxx.

References EggVertex::copy_grefs_from(), EggVertexPool::create_unique_vertex(), EggVertex::get_pool(), EggPrimitive::get_vertex(), TypedObject::is_of_type(), EggPolygon::recompute_polygon_normal(), and EggPrimitive::set_vertex().

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 719 of file eggGroupNode.cxx.

Referenced by recompute_tangent_binormal(), and recompute_tangent_binormal_auto().

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 746 of file eggGroupNode.cxx.

References recompute_tangent_binormal().

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 769 of file eggGroupNode.cxx.

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

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 539 of file eggGroupNode.cxx.

Referenced by XFileMesh::create_polygons().

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 953 of file eggGroupNode.cxx.

References EggPrimitive::cleanup(), and TypedObject::is_of_type().

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 912 of file eggGroupNode.cxx.

References EggVertexPool::empty(), TypedObject::is_of_type(), and EggVertexPool::remove_unused_vertices().

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

Rename by stripping out the prefix.

Definition at line 865 of file eggGroupNode.cxx.

References EggNode::rename_node(), and rename_nodes().

Referenced by rename_nodes().

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 196 of file eggGroupNode.cxx.

Referenced by r_load_externals().

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 420 of file eggGroupNode.cxx.

References EggTexture::get_alpha_filename(), EggFilenameNode::get_default_extension(), EggFilenameNode::get_filename(), VirtualFileSystem::get_global_ptr(), EggTexture::has_alpha_filename(), TypedObject::is_of_type(), VirtualFileSystem::resolve_filename(), and EggTexture::set_alpha_filename().

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 502 of file eggGroupNode.cxx.

References TypedObject::is_of_type(), and EggPrimitive::reverse_vertex_ordering().

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 322 of file eggGroupNode.cxx.

Referenced by EggJointNodePointer::do_finish_reparent(), SomethingToEggConverter::handle_external_reference(), EggData::merge(), EggMesher::mesh(), r_load_externals(), EggXfmSAnim::r_transform(), and EggData::read().

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.

Reimplemented in EggData.

Definition at line 666 of file eggGroupNode.cxx.

References EggVertex::copy_grefs_from(), EggVertexPool::create_unique_vertex(), EggVertex::get_pool(), EggPrimitive::get_vertex(), TypedObject::is_of_type(), and EggPrimitive::set_vertex().

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 803 of file eggGroupNode.cxx.

References TypedObject::is_of_type().

Referenced by EggLoader::make_polyset().

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 1064 of file eggGroupNode.cxx.

References EggPrimitive::get_connected_shading(), EggPrimitive::get_shading(), TypedObject::is_of_type(), and EggPrimitive::unify_attributes().

void EggGroupNode::update_under ( int  depth_offset) [protected, virtual]

This function is called from within EggGroupNode whenever the parentage of the node has changed.

It should update the depth and under_instance flags accordingly.

Offset is the difference between the old depth value and the new value. It should be consistent with the supplied depth value. If it is not, we have some error.

Reimplemented from EggNode.

Definition at line 1404 of file eggGroupNode.cxx.

Referenced by EggGroup::set_billboard_center(), EggData::set_coordinate_system(), and EggGroup::transform_changed().

void EggGroupNode::write ( 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 EggData, EggGroup, EggTable, and EggXfmSAnim.

Definition at line 87 of file eggGroupNode.cxx.


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