A parametric NURBS surface. More...

#include "eggNurbsSurface.h"

Inheritance diagram for EggNurbsSurface:

Public Types
typedef plist< PT(EggNurbsCurve) >	Curves

typedef Curves	Loop

typedef plist< Loop >	Loops

typedef Loops	Trim

typedef plist< Trim >	Trims

Public Types inherited from EggPrimitive
typedef Vertices::const_iterator	const_iterator

typedef Vertices::const_pointer	const_pointer

typedef Vertices::const_reference	const_reference

typedef Vertices::const_reverse_iterator	const_reverse_iterator

typedef Vertices::difference_type	difference_type

typedef Vertices::const_iterator	iterator

typedef Vertices::const_pointer	pointer

typedef Vertices::const_reference	reference

typedef Vertices::const_reverse_iterator	reverse_iterator

enum	Shading { S_unknown, S_overall, S_per_face, S_per_vertex }

typedef Vertices::size_type	size_type

Public Types inherited from EggRenderMode
enum	AlphaMode { AM_unspecified, AM_off, AM_on, AM_blend, AM_blend_no_occlude, AM_ms, AM_ms_mask, AM_binary, AM_dual, AM_premultiplied }

enum	DepthTestMode { DTM_unspecified, DTM_off, DTM_on }

enum	DepthWriteMode { DWM_unspecified, DWM_off, DWM_on }

enum	VisibilityMode { VM_unspecified, VM_hidden, VM_normal }

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

	EggNurbsSurface (const EggNurbsSurface &copy)

virtual TypeHandle	force_init_type () override

EggVertex *	get_cv (int ui, int vi) const
	Returns the control vertex at the indicate U, V position. More...

int	get_num_cvs () const
	Returns the total number of control vertices that should be defined for the surface. More...

int	get_num_u_cvs () const
	Returns the number of control vertices that should be present in the U direction. More...

int	get_num_u_knots () const

int	get_num_v_cvs () const
	Returns the number of control vertices that should be present in the V direction. More...

int	get_num_v_knots () const

virtual TypeHandle	get_type () const override

int	get_u_degree () const
	Returns the degree of the surface in the U direction. More...

int	get_u_index (int vertex_index) const
	Returns the U index number of the given vertex within the EggPrimitive's linear list of vertices. More...

double	get_u_knot (int k) const

int	get_u_order () const
	Returns the order of the surface in the U direction. More...

int	get_v_degree () const
	Returns the degree of the surface in the V direction. More...

int	get_v_index (int vertex_index) const
	Returns the V index number of the given vertex within the EggPrimitive's linear list of vertices. More...

double	get_v_knot (int k) const

int	get_v_order () const
	Returns the order of the surface in the V direction. More...

int	get_vertex_index (int ui, int vi) const
	Returns the index number within the EggPrimitive's list of the control vertex at position ui, vi. More...

bool	is_closed_u () const
	Returns true if the surface appears to be closed in the U direction. More...

bool	is_closed_v () const
	Returns true if the surface appears to be closed in the V direction. More...

bool	is_valid () const
	Returns true if the NURBS parameters are all internally consistent (e.g. More...

virtual EggNurbsSurface *	make_copy () const override
	Makes a copy of this object. More...

EggNurbsSurface &	operator= (const EggNurbsSurface &copy)

void	set_cv (int ui, int vi, EggVertex *vertex)
	Redefines the control vertex associated with a particular u, v coordinate pair. More...

void	set_num_u_knots (int num)
	Directly changes the number of knots in the U direction. More...

void	set_num_v_knots (int num)
	Directly changes the number of knots in the V direction. More...

void	set_u_knot (int k, double value)
	Resets the value of the indicated knot as indicated. More...

void	set_u_order (int u_order)
	Directly changes the order in the U direction to the indicated value (which must be an integer in the range 1 <= u_order <= 4). More...

void	set_v_knot (int k, double value)
	Resets the value of the indicated knot as indicated. More...

void	set_v_order (int v_order)
	Directly changes the order in the V direction to the indicated value (which must be an integer in the range 1 <= v_order <= 4). More...

void	setup (int u_order, int v_order, int num_u_knots, int num_v_knots)
	Prepares a new surface definition with the indicated order and number of knots in each dimension. More...

virtual void	write (std::ostream &out, int indent_level) const override
	Writes the nurbsSurface to the indicated output stream in Egg format. More...

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

	EggSurface (const EggSurface &copy)

int	get_u_subdiv () const
	Returns the requested number of subdivisions in the U direction, or 0 if no particular subdivisions have been requested. More...

int	get_v_subdiv () const
	Returns the requested number of subdivisions in the U direction, or 0 if no particular subdivisions have been requested. More...

EggSurface &	operator= (const EggSurface &copy)

void	set_u_subdiv (int subdiv)
	Sets the number of subdivisions in the U direction that will be requested across the surface. More...

void	set_v_subdiv (int subdiv)
	Sets the number of subdivisions in the U direction that will be requested across the surface. More...

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

	EggPrimitive (const EggPrimitive &copy)

void	add_texture (EggTexture *texture)
	Applies the indicated texture to the primitive. More...

EggVertex *	add_vertex (EggVertex *vertex)
	Adds the indicated vertex to the end of the primitive's list of vertices, and returns it. More...

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

virtual void	apply_last_attribute ()
	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

virtual bool	cleanup ()
	Cleans up modeling errors in whatever context this makes sense. More...

void	clear ()
	Removes all of the vertices from the primitive. More...

void	clear_connected_shading ()
	Resets the connected_shading member in this primitive, so that get_connected_shading() will recompute a new value. More...

void	clear_material ()

void	clear_texture ()
	Removes any texturing from the primitive. More...

void	copy_attributes (const EggAttributes &other)
	Copies the rendering attributes from the indicated primitive. More...

void	copy_attributes (const EggPrimitive &other)
	Copies the rendering attributes from the indicated primitive. More...

void	copy_vertices (const EggPrimitive &other)
	Replaces the current primitive's list of vertices with a copy of the list of vertices on the other primitive. 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 primitive 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 primitive that has a bin specified. 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 primitive 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 primitive that has a draw_order specified. 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...

bool	empty () const

iterator	end () const

iterator	erase (iterator position)

iterator	erase (iterator first, iterator last)
	Part of the implementaion of the EggPrimitive as an STL container. More...

iterator	find (EggVertex *vertex)
	Returns the iterator pointing to the indicated vertex, or end() if the vertex is not part of the primitive. More...

bool	get_bface_flag () const

Shading	get_connected_shading () const

EggMaterial *	get_material () const

int	get_num_textures () const

size_t	get_num_vertices () const

EggVertexPool *	get_pool () const

virtual Shading	get_shading () const

std::string	get_sort_name () const

EggTexture *	get_texture () const

EggTexture *	get_texture (int n) const

EggVertex *	get_vertex (size_t index) const

bool	has_material () const

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...

bool	has_texture () const
	Returns true if the primitive has any textures specified, false otherwise. More...

bool	has_texture (EggTexture *texture) const
	Returns true if the primitive has the particular indicated texture, false otherwise. More...

bool	has_vertex_color () const
	Returns true if any vertex on the primitive has a specific color set, false otherwise. More...

bool	has_vertex_normal () const
	Returns true if any vertex on the primitive has a specific normal set, false otherwise. More...

iterator	insert (iterator position, EggVertex *x)

void	insert_vertex (size_t index, EggVertex *vertex)

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

EggVertex *	operator [] (int index) const
	This is read-only: you can't assign directly to an indexed vertex. More...

EggPrimitive &	operator= (const EggPrimitive &copy)

virtual void	post_apply_flat_attribute ()
	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...

reverse_iterator	rbegin () const

void	remove_doubled_verts (bool closed)
	Certain kinds of primitives, particularly polygons, don't like to have the same vertex repeated consecutively. More...

void	remove_nonunique_verts ()
	Removes any multiple appearances of the same vertex from the primitive. More...

EggVertex *	remove_vertex (EggVertex *vertex)

void	remove_vertex (size_t index)

reverse_iterator	rend () const

void	replace (iterator position, EggVertex *vertex)
	Replaces the vertex at the indicated position with the indicated vertex. More...

virtual void	reverse_vertex_ordering ()
	Reverses the ordering of the vertices in this primitive, if appropriate, in order to change the direction the polygon appears to be facing. More...

void	set_bface_flag (bool flag)

void	set_material (EggMaterial *material)

void	set_texture (EggTexture *texture)
	Replaces the current list of textures with the indicated texture. More...

void	set_vertex (size_t index, EggVertex *vertex)

size_type	size () const

void	test_vref_integrity () const

virtual void	unify_attributes (Shading shading)
	If the shading property is S_per_vertex, ensures that all vertices have a normal and a color, and the overall primitive does not. 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 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 bool	determine_indexed ()
	Walks back up the hierarchy, looking for an EggGroup at this level or above that has the "indexed" scalar set. 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)

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

void	clear_color ()

void	clear_normal ()

int	compare_to (const EggAttributes &other) const
	An ordering operator to compare two vertices for sorting order. More...

void	copy_color (const EggAttributes &other)
	Sets this color to be the same as the other's, include morphs. More...

void	copy_normal (const EggAttributes &other)
	Sets this normal to be the same as the other's, include morphs. More...

LColor	get_color () const
	Returns the color set on this particular attribute. More...

const LNormald &	get_normal () const

bool	has_color () const

bool	has_normal () const

bool	matches_color (const EggAttributes &other) const
	Returns true if this color matches that of the other EggAttributes object, include the morph list. More...

bool	matches_normal (const EggAttributes &other) const
	Returns true if this normal matches that of the other EggAttributes object, include the morph list. More...

EggAttributes &	operator= (const EggAttributes &copy)

void	set_color (const LColor &Color)

void	set_normal (const LNormald &normal)

bool	sorts_less_than (const EggAttributes &other) const
	An ordering operator to compare two vertices for sorting order. More...

void	transform (const LMatrix4d &mat)
	Applies the indicated transformation matrix to the attributes. More...

void	write (std::ostream &out, int indent_level) const
	Writes the attributes to the indicated output stream in Egg format. More...

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

void	clear_bin ()
	Removes the bin name that was set for this particular object. More...

void	clear_depth_offset ()
	Removes the depth-offset flag from this particular object. More...

void	clear_draw_order ()
	Removes the draw-order flag from this particular object. More...

AlphaMode	get_alpha_mode () const
	Returns the alpha mode that was set, or AM_unspecified if nothing was set. More...

std::string	get_bin () const
	Returns the bin name that has been set for this particular object, if any. More...

int	get_depth_offset () const
	Returns the "depth-offset" flag as set for this particular object. More...

DepthTestMode	get_depth_test_mode () const
	Returns the depth_test mode that was set, or DTM_unspecified if nothing was set. More...

DepthWriteMode	get_depth_write_mode () const
	Returns the depth_write mode that was set, or DWM_unspecified if nothing was set. More...

int	get_draw_order () const
	Returns the "draw-order" flag as set for this particular object. More...

VisibilityMode	get_visibility_mode () const
	Returns the visibility mode that was set, or VM_unspecified if nothing was set. More...

bool	has_bin () const
	Returns true if a bin name has been set for this particular object. More...

bool	has_depth_offset () const
	Returns true if the depth-offset flag has been set for this particular object. More...

bool	has_draw_order () const
	Returns true if the draw-order flag has been set for this particular object. More...

bool	operator != (const EggRenderMode &other) const

bool	operator< (const EggRenderMode &other) const

EggRenderMode &	operator= (const EggRenderMode &copy)

bool	operator== (const EggRenderMode &other) const

void	set_alpha_mode (AlphaMode mode)
	Specifies precisely how the transparency for this geometry should be achieved, or if it should be used. More...

void	set_bin (const std::string &bin)
	Sets the "bin" string for this particular object. More...

void	set_depth_offset (int bias)
	Sets the "depth-offset" flag associated with this object. More...

void	set_depth_test_mode (DepthTestMode mode)
	Specifies whether this geometry should be tested against the depth buffer when it is drawn (assuming the rendering backend provides a depth buffer). More...

void	set_depth_write_mode (DepthWriteMode mode)
	Specifies whether writes should be made to the depth buffer (assuming the rendering backend provides a depth buffer) when rendering this geometry. More...

void	set_draw_order (int order)
	Sets the "draw-order" flag associated with this object. More...

void	set_visibility_mode (VisibilityMode mode)
	Specifies whether this geometry is to be considered normally visible, or hidden. More...

void	write (std::ostream &out, int indent_level) const
	Writes the attributes to the indicated output stream in Egg format. More...

Static Public Member Functions
static TypeHandle	get_class_type ()

static void	init_type ()

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

static void	init_type ()

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

static void	init_type ()

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 ()

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

static void	init_type ()

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

static void	init_type ()

static AlphaMode	string_alpha_mode (const std::string &string)
	Returns the AlphaMode value associated with the given string representation, or AM_unspecified if the string does not match any known AlphaMode value. More...

static DepthTestMode	string_depth_test_mode (const std::string &string)
	Returns the DepthTestMode value associated with the given string representation, or DTM_unspecified if the string does not match any known DepthTestMode value. More...

static DepthWriteMode	string_depth_write_mode (const std::string &string)
	Returns the DepthWriteMode value associated with the given string representation, or DWM_unspecified if the string does not match any known DepthWriteMode value. More...

static VisibilityMode	string_visibility_mode (const std::string &string)
	Returns the HiddenMode value associated with the given string representation, or VM_unspecified if the string does not match any known HiddenMode value. More...

Public Attributes
Curves	_curves_on_surface

Trims	_trims

	get_num_u_knots
	Returns the number of knots in the U direction. More...

	get_num_v_knots
	Returns the number of knots in the V direction. More...

	get_u_knot
	Returns the nth knot value defined in the U direction. More...

	get_v_knot
	Returns the nth knot value defined in the V direction. More...

Public Attributes inherited from EggPrimitive
	clear_material
	Removes any material from the primitive. More...

	get_bface_flag
	Retrieves the backfacing flag of the polygon. More...

	get_connected_shading
	Determines what sort of shading properties this primitive's connected neighbors have. More...

	get_material
	Returns a pointer to the applied material, or NULL if there is no material applied. More...

	get_num_textures
	Returns the number of textures applied to the primitive. More...

	get_num_vertices

	get_pool
	Returns the vertex pool associated with the vertices of the primitive, or NULL if the primitive has no vertices. More...

	get_shading
	Returns the shading properties apparent on this particular primitive. More...

	get_sort_name
	Returns the name of the primitive for the purposes of sorting primitives into different groups, if there is one. More...

	get_texture
	Returns the first texture on the primitive, if any, or NULL if there are no textures on the primitive. More...

	get_vertex
	Returns a particular index based on its index number. More...

	has_material
	Returns true if the primitive is materiald (and get_material() will return a real pointer), false otherwise (and get_material() will return NULL). More...

	insert_vertex
	Inserts a vertex at the given position. More...

	remove_vertex
	Removes the indicated vertex from the primitive and returns it. More...

	set_bface_flag
	Sets the backfacing flag of the polygon. More...

	set_material
	Applies the indicated material to the primitive. More...

	set_vertex
	Replaces a particular vertex based on its index number in the list of vertices. More...

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

Public Attributes inherited from EggAttributes
EggMorphNormalList	_dnormals

EggMorphColorList	_drgbas

Detailed Description

A parametric NURBS surface.

Definition at line 27 of file eggNurbsSurface.h.

Member Function Documentation

◆ get_cv()

EggVertex * EggNurbsSurface::get_cv	(	int	ui,
		int	vi
	)		const

inline

Returns the control vertex at the indicate U, V position.

Definition at line 253 of file eggNurbsSurface.I.

◆ get_num_cvs()

int EggNurbsSurface::get_num_cvs ( ) const

inline

Returns the total number of control vertices that *should* be defined for the surface.

This is determined by the number of knots and the order, in each direction; it does not necessarily reflect the number of vertices that have actually been added to the surface. (However, if the number of vertices in the surface are wrong, the surface is invalid.)

Definition at line 192 of file eggNurbsSurface.I.

References get_num_u_cvs(), and get_num_v_cvs().

Referenced by is_valid().

◆ get_num_u_cvs()

int EggNurbsSurface::get_num_u_cvs ( ) const

inline

Returns the number of control vertices that should be present in the U direction.

This is determined by the number of knots and the order; it does not necessarily reflect the number of vertices that have actually been added to the surface. (However, if the number of vertices in the surface are wrong, the surface is invalid.)

Definition at line 168 of file eggNurbsSurface.I.

References get_num_u_knots, and get_u_order().

Referenced by get_num_cvs().

◆ get_num_v_cvs()

int EggNurbsSurface::get_num_v_cvs ( ) const

inline

Returns the number of control vertices that should be present in the V direction.

This is determined by the number of knots and the order; it does not necessarily reflect the number of vertices that have actually been added to the surface. (However, if the number of vertices in the surface are wrong, the surface is invalid.)

Definition at line 180 of file eggNurbsSurface.I.

References get_num_v_knots, and get_v_order().

Referenced by get_num_cvs().

◆ get_u_degree()

int EggNurbsSurface::get_u_degree ( ) const

inline

Returns the degree of the surface in the U direction.

For a typical NURBS, the degree is 3.

Definition at line 131 of file eggNurbsSurface.I.

◆ get_u_index()

int EggNurbsSurface::get_u_index ( int vertex_index ) const

inline

Returns the U index number of the given vertex within the EggPrimitive's linear list of vertices.

An EggNurbsSurface maps a linear list of vertices to its 2-d mesh; this returns the U index number that corresponds to the nth vertex in the list.

Definition at line 203 of file eggNurbsSurface.I.

◆ get_u_order()

int EggNurbsSurface::get_u_order ( ) const

inline

Returns the order of the surface in the U direction.

The order is the degree of the NURBS equation plus 1; for a typical NURBS, the order is 4. With this implementation of NURBS, the order must be in the range [1, 4].

Definition at line 112 of file eggNurbsSurface.I.

Referenced by get_num_u_cvs(), and write().

◆ get_v_degree()

int EggNurbsSurface::get_v_degree ( ) const

inline

Returns the degree of the surface in the V direction.

for a typical NURBS, the degree is 3.

Definition at line 140 of file eggNurbsSurface.I.

◆ get_v_index()

int EggNurbsSurface::get_v_index ( int vertex_index ) const

inline

Returns the V index number of the given vertex within the EggPrimitive's linear list of vertices.

An EggNurbsSurface maps a linear list of vertices to its 2-d mesh; this returns the V index number that corresponds to the nth vertex in the list.

Definition at line 215 of file eggNurbsSurface.I.

◆ get_v_order()

int EggNurbsSurface::get_v_order ( ) const

inline

Returns the order of the surface in the V direction.

The order is the degree of the NURBS equation plus 1; for a typical NURBS, the order is 4. With this implementation of NURBS, the order must be in the range [1, 4].

Definition at line 122 of file eggNurbsSurface.I.

Referenced by get_num_v_cvs(), and write().

◆ get_vertex_index()

int EggNurbsSurface::get_vertex_index	(	int	ui,
		int	vi
	)		const

inline

Returns the index number within the EggPrimitive's list of the control vertex at position ui, vi.

Definition at line 225 of file eggNurbsSurface.I.

◆ is_closed_u()

bool EggNurbsSurface::is_closed_u ( ) const

Returns true if the surface appears to be closed in the U direction.

Since the Egg syntax does not provide a means for explicit indication of closure, this has to be guessed at by examining the surface itself.

Definition at line 136 of file eggNurbsSurface.cxx.

◆ is_closed_v()

bool EggNurbsSurface::is_closed_v ( ) const

Returns true if the surface appears to be closed in the V direction.

Since the Egg syntax does not provide a means for explicit indication of closure, this has to be guessed at by examining the surface itself.

Definition at line 157 of file eggNurbsSurface.cxx.

◆ is_valid()

bool EggNurbsSurface::is_valid ( ) const

Returns true if the NURBS parameters are all internally consistent (e.g.

it has the right number of vertices to match its number of knots and order in each dimension), or false otherwise.

Definition at line 102 of file eggNurbsSurface.cxx.

References get_num_cvs().

◆ make_copy()

EggNurbsSurface * EggNurbsSurface::make_copy ( ) const

overridevirtual

Makes a copy of this object.

Implements EggPrimitive.

Definition at line 24 of file eggNurbsSurface.cxx.

◆ set_cv()

void EggNurbsSurface::set_cv	(	int	ui,
		int	vi,
		EggVertex *	vertex
	)

inline

Redefines the control vertex associated with a particular u, v coordinate pair.

This is just a shorthand to access the EggPrimitive's normal vertex assignment for a 2-d control vertex.

Definition at line 101 of file eggNurbsSurface.I.

◆ set_num_u_knots()

void EggNurbsSurface::set_num_u_knots ( int num )

Directly changes the number of knots in the U direction.

This will either add zero-valued knots onto the end, or truncate knot values from the end, depending on whether the list is being increased or decreased. If possible, it is preferable to use the setup() method instead of directly setting the number of knots, as this may result in an invalid surface.

Definition at line 62 of file eggNurbsSurface.cxx.

◆ set_num_v_knots()

void EggNurbsSurface::set_num_v_knots ( int num )

Directly changes the number of knots in the V direction.

This will either add zero-valued knots onto the end, or truncate knot values from the end, depending on whether the list is being increased or decreased. If possible, it is preferable to use the setup() method instead of directly setting the number of knots, as this may result in an invalid surface.

Definition at line 83 of file eggNurbsSurface.cxx.

◆ set_u_knot()

void EggNurbsSurface::set_u_knot	(	int	k,
		double	value
	)

inline

Resets the value of the indicated knot as indicated.

k must be in the range 0 <= k < get_num_u_knots(), and the value must be in the range get_u_knot(k - 1) <= value <= get_u_knot(k + 1).

Definition at line 79 of file eggNurbsSurface.I.

◆ set_u_order()

void EggNurbsSurface::set_u_order ( int u_order )

inline

Directly changes the order in the U direction to the indicated value (which must be an integer in the range 1 <= u_order <= 4).

If possible, it is preferable to use the setup() method instead of this method, since changing the order directly may result in an invalid surface.

Definition at line 56 of file eggNurbsSurface.I.

◆ set_v_knot()

void EggNurbsSurface::set_v_knot	(	int	k,
		double	value
	)

inline

Resets the value of the indicated knot as indicated.

k must be in the range 0 <= k < get_num_v_knots(), and the value must be in the range get_v_knot(k - 1) <= value <= get_v_knot(k + 1).

Definition at line 90 of file eggNurbsSurface.I.

◆ set_v_order()

void EggNurbsSurface::set_v_order ( int v_order )

inline

Directly changes the order in the V direction to the indicated value (which must be an integer in the range 1 <= v_order <= 4).

If possible, it is preferable to use the setup() method instead of this method, since changing the order directly may result in an invalid surface.

Definition at line 68 of file eggNurbsSurface.I.

◆ setup()

void EggNurbsSurface::setup	(	int	u_order,
		int	v_order,
		int	num_u_knots,
		int	num_v_knots
	)

Prepares a new surface definition with the indicated order and number of knots in each dimension.

This also implies a particular number of vertices in each dimension as well (the number of knots minus the order), but it is up to the user to add the correct number of vertices to the surface by repeatedly calling push_back().

Definition at line 36 of file eggNurbsSurface.cxx.

◆ write()

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

overridevirtual

Writes the nurbsSurface to the indicated output stream in Egg format.

Implements EggPrimitive.

Definition at line 171 of file eggNurbsSurface.cxx.

References get_u_order(), EggSurface::get_u_subdiv(), get_v_order(), EggSurface::get_v_subdiv(), indent(), EggNamedObject::write_header(), and write_long_list().

Member Data Documentation

◆ get_num_u_knots

int EggNurbsSurface::get_num_u_knots

inline

Returns the number of knots in the U direction.

Definition at line 73 of file eggNurbsSurface.h.

Referenced by get_num_u_cvs().

◆ get_num_v_knots

int EggNurbsSurface::get_num_v_knots

inline

Returns the number of knots in the V direction.

Definition at line 75 of file eggNurbsSurface.h.

Referenced by get_num_v_cvs().

◆ get_u_knot

double EggNurbsSurface::get_u_knot

inline

Returns the nth knot value defined in the U direction.

Definition at line 73 of file eggNurbsSurface.h.

◆ get_v_knot

double EggNurbsSurface::get_v_knot

inline

Returns the nth knot value defined in the V direction.

Definition at line 75 of file eggNurbsSurface.h.

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

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

Public Types

Public Member Functions

Static Public Member Functions

Public Attributes

Detailed Description

Member Function Documentation

◆ get_cv()

◆ get_num_cvs()

◆ get_num_u_cvs()

◆ get_num_v_cvs()

◆ get_u_degree()

◆ get_u_index()

◆ get_u_order()

◆ get_v_degree()

◆ get_v_index()

◆ get_v_order()

◆ get_vertex_index()

◆ is_closed_u()

◆ is_closed_v()

◆ is_valid()

◆ make_copy()

◆ set_cv()

◆ set_num_u_knots()

◆ set_num_v_knots()

◆ set_u_knot()

◆ set_u_order()

◆ set_v_knot()

◆ set_v_order()

◆ setup()

◆ write()

Member Data Documentation

◆ get_num_u_knots

◆ get_num_v_knots

◆ get_u_knot

◆ get_v_knot