A Nonuniform Rational B-Spline. More...
#include "nurbsCurve.h"
Inheritance diagram for NurbsCurve:
Public Member Functions | |
| NurbsCurve (const ParametricCurve &pc) | |
| Constructs a NURBS curve equivalent to the indicated (possibly non-NURBS) curve. More... | |
| NurbsCurve (int order, int num_cvs, const PN_stdfloat knots[], const LVecBase4 cvs[]) | |
| Constructs a NURBS curve according to the indicated NURBS parameters. More... | |
| virtual bool | convert_to_nurbs (ParametricCurve *nc) const |
| Stores in the indicated NurbsCurve a NURBS representation of an equivalent curve. More... | |
| virtual TypeHandle | force_init_type () |
| CubicCurveseg * | get_curveseg (int ti) |
| virtual LVecBase4 | get_cv (int n) const |
| Returns the position in homogeneous space of the indicated CV. More... | |
| virtual PN_stdfloat | get_knot (int n) const |
| Retrieves the value of the indicated knot. More... | |
| virtual int | get_num_cvs () const |
| virtual int | get_num_knots () const |
| Returns the number of knots on the curve. More... | |
| virtual NurbsCurveInterface * | get_nurbs_interface () |
| Returns a pointer to the object as a NurbsCurveInterface object if it happens to be a NURBS-style curve; otherwise, returns NULL. More... | |
| virtual int | get_order () const |
| virtual TypeHandle | get_type () const |
| virtual bool | insert_cv (PN_stdfloat t) |
| Inserts a new CV into the middle of the curve at the indicated parametric value. More... | |
| virtual PandaNode * | make_copy () const |
| Returns a newly-allocated PandaNode that is a shallow copy of this one. More... | |
| virtual bool | rebuild_curveseg (int rtype0, PN_stdfloat t0, const LVecBase4 &v0, int rtype1, PN_stdfloat t1, const LVecBase4 &v1, int rtype2, PN_stdfloat t2, const LVecBase4 &v2, int rtype3, PN_stdfloat t3, const LVecBase4 &v3) |
| Rebuilds the current curve segment (as selected by the most recent call to find_curve()) according to the specified properties (see CubicCurveseg::compute_seg). More... | |
| virtual bool | recompute () |
| Recalculates the curve basis according to the latest position of the CV's, knots, etc. More... | |
| virtual void | remove_all_cvs () |
| Removes all CV's from the curve. More... | |
| virtual bool | remove_cv (int n) |
| Removes the indicated CV from the curve. More... | |
| virtual bool | set_cv (int n, const LVecBase4 &v) |
| Repositions the indicated CV. More... | |
| virtual bool | set_knot (int n, PN_stdfloat t) |
| Sets the value of the indicated knot. More... | |
| virtual void | set_order (int order) |
| Changes the order of the curve. More... | |
| virtual bool | stitch (const ParametricCurve *a, const ParametricCurve *b) |
| Regenerates this curve as one long curve: the first curve connected end-to- end with the second one. More... | |
| virtual void | write (std::ostream &out, int indent_level=0) const |
 Public Member Functions inherited from PiecewiseCurve | |
| virtual bool | adjust_point (PN_stdfloat t, PN_stdfloat px, PN_stdfloat py, PN_stdfloat pz) |
| Recomputes the curve such that it passes through the point (px, py, pz) at time t, but keeps the same tangent value at that point. More... | |
| virtual bool | adjust_pt (PN_stdfloat t, PN_stdfloat px, PN_stdfloat py, PN_stdfloat pz, PN_stdfloat tx, PN_stdfloat ty, PN_stdfloat tz) |
| Recomputes the curve such that it passes through the point (px, py, pz) with the tangent (tx, ty, tz). More... | |
| virtual bool | adjust_tangent (PN_stdfloat t, PN_stdfloat tx, PN_stdfloat ty, PN_stdfloat tz) |
| Recomputes the curve such that it has the tangent (tx, ty, tz) at time t, but keeps the same position at the point. More... | |
| virtual bool | get_2ndtangent (PN_stdfloat t, LVecBase3 &tangent2) const |
| Returns the tangent of the first derivative of the curve at the point t. More... | |
| virtual bool | get_bezier_segs (BezierSegs &bz_segs) const |
| Fills up the indicated vector with a list of BezierSeg structs that describe the curve. More... | |
| ParametricCurve * | get_curveseg (int ti) |
| Returns the curve segment corresponding to the given index. More... | |
| virtual PN_stdfloat | get_max_t () const |
| Returns the upper bound of t for the entire curve. More... | |
| int | get_num_segs () const |
| Returns the number of curve segments that make up the Piecewise curve. More... | |
| virtual bool | get_point (PN_stdfloat t, LVecBase3 &point) const |
| Returns the point of the curve at a given parametric point t. More... | |
| virtual bool | get_pt (PN_stdfloat t, LVecBase3 &point, LVecBase3 &tangent) const |
| Simultaneously returns the point and tangent of the curve at a given parametric point t. More... | |
| virtual bool | get_tangent (PN_stdfloat t, LVecBase3 &tangent) const |
| Returns the tangent of the curve at a given parametric point t. More... | |
| PN_stdfloat | get_tend (int ti) const |
| Returns the parametric end of the given segment of the curve. More... | |
| PN_stdfloat | get_tlength (int ti) const |
| Returns the parametric length of the given segment of the curve. More... | |
| PN_stdfloat | get_tstart (int ti) const |
| Returns the parametric start of the given segment of the curve. More... | |
| bool | insert_curveseg (int ti, ParametricCurve *seg, PN_stdfloat tlength) |
| Inserts a new curve segment at the indicated index. More... | |
| virtual bool | is_valid () const |
| Returns true if the curve is defined. More... | |
| void | make_nurbs (int order, int num_cvs, const PN_stdfloat knots[], const LVecBase4 cvs[]) |
| Defines the curve as a general NURBS curve. More... | |
| void | remove_all_curvesegs () |
| Removes all curve segments from the curve. More... | |
| bool | remove_curveseg (int ti) |
| Removes the given curve segment from the curve and frees it. More... | |
| bool | set_tlength (int ti, PN_stdfloat tlength) |
| Sets the parametric length of the given segment of the curve. More... | |
| Public Member Functions inherited from ParametricCurve | |
| ParametricCurve () | |
| This is a virtual base class. More... | |
| PN_stdfloat | calc_length () const |
| Approximates the length of the entire curve to within a few decimal places. More... | |
| PN_stdfloat | calc_length (PN_stdfloat from, PN_stdfloat to) const |
| Approximates the length of the curve segment from parametric time 'from' to time 'to'. More... | |
| virtual bool | convert_to_hermite (HermiteCurve *hc) const |
| Stores an equivalent curve representation in the indicated Hermite curve, if possible. More... | |
| PN_stdfloat | find_length (PN_stdfloat start_t, PN_stdfloat length_offset) const |
| Returns the parametric value corresponding to the indicated distance along the curve from the starting parametric value. More... | |
| virtual bool | get_bezier_seg (BezierSeg &) const |
| Fills the BezierSeg structure with a description of the curve segment as a Bezier, if possible, but does not change the _t member of the structure. More... | |
| int | get_curve_type () const |
| Returns the flag indicating the use to which the curve is intended to be put. More... | |
| int | get_num_dimensions () const |
| Returns the number of significant dimensions in the curve's vertices, as set by a previous call to set_num_dimensions(). More... | |
| void | register_drawer (ParametricCurveDrawer *drawer) |
| Registers a Drawer with this curve that will automatically be updated whenever the curve is modified, so that the visible representation of the curve is kept up to date. More... | |
| virtual bool | safe_to_flatten () const |
| Returns true if it is generally safe to flatten out this particular kind of PandaNode by duplicating instances, false otherwise (for instance, a Camera cannot be safely flattened, because the Camera pointer itself is meaningful). More... | |
| virtual bool | safe_to_transform () const |
| Returns true if it is generally safe to transform this particular kind of PandaNode by calling the xform() method, false otherwise. More... | |
| void | set_curve_type (int type) |
| Sets the flag indicating the use to which the curve is intended to be put. More... | |
| void | set_num_dimensions (int num) |
| Specifies the number of significant dimensions in the curve's vertices. More... | |
| void | unregister_drawer (ParametricCurveDrawer *drawer) |
| Removes a previously registered drawer from the list of automatically- refreshed drawers. More... | |
| bool | write_egg (Filename filename, CoordinateSystem cs=CS_default) |
| Writes an egg description of the nurbs curve to the specified output file. More... | |
| bool | write_egg (std::ostream &out, const Filename &filename, CoordinateSystem cs) |
| Writes an egg description of the nurbs curve to the specified output stream. More... | |
| Public Member Functions inherited from PandaNode | |
| PandaNode (const std::string &name) | |
| void | add_child (PandaNode *child_node, int sort=0, Thread *current_thread=Thread::get_current_thread()) |
| virtual void | add_for_draw (CullTraverser *trav, CullTraverserData &data) |
| Adds the node's contents to the CullResult we are building up during the cull traversal, so that it will be drawn at render time. More... | |
| void | add_stashed (PandaNode *child_node, int sort=0, Thread *current_thread=Thread::get_current_thread()) |
| Adds a new child to the node, directly as a stashed child. More... | |
| void | adjust_draw_mask (DrawMask show_mask, DrawMask hide_mask, DrawMask clear_mask) |
| Adjusts the hide/show bits of this particular node. More... | |
| virtual void | apply_attribs_to_vertices (const AccumulatedAttribs &attribs, int attrib_types, GeomTransformer &transformer) |
| Applies whatever attributes are specified in the AccumulatedAttribs object (and by the attrib_types bitmask) to the vertices on this node, if appropriate. More... | |
| virtual Light * | as_light () |
| Cross-casts the node to a Light pointer, if it is one of the four kinds of Light nodes, or returns NULL if it is not. More... | |
| void | clear_attrib (TypeHandle type) |
| void | clear_attrib (int slot) |
| Removes the render attribute of the given type from this node. More... | |
| void | clear_bounds () |
| Reverses the effect of a previous call to set_bounds(), and allows the node's bounding volume to be automatically computed once more based on the contents of the node. More... | |
| void | clear_effect (TypeHandle type) |
| Removes the render effect of the given type from this node. More... | |
| void | clear_effects (Thread *current_thread=Thread::get_current_thread()) |
| void | clear_state (Thread *current_thread=Thread::get_current_thread()) |
| void | clear_tag (const std::string &key, Thread *current_thread=Thread::get_current_thread()) |
| void | clear_transform (Thread *current_thread=Thread::get_current_thread()) |
| void | clear_unexpected_change (unsigned int flags) |
| Sets one or more of the PandaNode::UnexpectedChange bits off, indicating that the corresponding property may once again change on this node. More... | |
| virtual PandaNode * | combine_with (PandaNode *other) |
| Collapses this PandaNode with the other PandaNode, if possible, and returns a pointer to the combined PandaNode, or NULL if the two PandaNodes cannot safely be combined. More... | |
| int | compare_tags (const PandaNode *other) const |
| Returns a number less than 0, 0, or greater than 0, to indicate the similarity of tags between this node and the other one. More... | |
| void | copy_all_properties (PandaNode *other) |
| Copies the TransformState, RenderState, RenderEffects, tags, Python tags, and the show/hide state from the other node onto this one. More... | |
| void | copy_children (PandaNode *other, Thread *current_thread=Thread::get_current_thread()) |
| Makes another instance of all the children of the other node, copying them to this node. More... | |
| void | copy_tags (PandaNode *other) |
| Copies all of the tags stored on the other node onto this node. More... | |
| int | count_num_descendants () const |
| virtual | CPT (TransformState) calc_tight_bounds(LPoint3 &min_point |
| CPT (RenderAttrib) get_attrib(TypeHandle type) const | |
| CPT (RenderAttrib) get_attrib(int slot) const | |
| CPT (RenderEffect) get_effect(TypeHandle type) const | |
| CPT (RenderState) get_state(Thread *current_thread | |
| CPT (RenderEffects) get_effects(Thread *current_thread | |
| CPT (TransformState) get_transform(Thread *current_thread | |
| CPT (TransformState) get_prev_transform(Thread *current_thread | |
| CPT (RenderAttrib) get_off_clip_planes(Thread *current_thread | |
| CPT (BoundingVolume) get_bounds(Thread *current_thread | |
| CPT (BoundingVolume) get_bounds(UpdateSeq &seq | |
| CPT (BoundingVolume) get_internal_bounds(Thread *current_thread | |
| virtual bool | cull_callback (CullTraverser *trav, CullTraverserData &data) |
| virtual PandaNode * | dupe_for_flatten () const |
| This is similar to make_copy(), but it makes a copy for the specific purpose of flatten. More... | |
| int | find_child (PandaNode *node, Thread *current_thread=Thread::get_current_thread()) const |
| Returns the index of the indicated child node, if it is a child, or -1 if it is not. More... | |
| int | find_parent (PandaNode *node, Thread *current_thread=Thread::get_current_thread()) const |
| Returns the index of the indicated parent node, if it is a parent, or -1 if it is not. More... | |
| int | find_stashed (PandaNode *node, Thread *current_thread=Thread::get_current_thread()) const |
| Returns the index of the indicated stashed node, if it is a stashed child, or -1 if it is not. More... | |
| BoundingVolume::BoundsType | get_bounds_type () const |
| PandaNode * | get_child (int n, Thread *current_thread=Thread::get_current_thread()) const |
| int | get_child_sort (int n, Thread *current_thread=Thread::get_current_thread()) const |
| Returns the sort index of the nth child node of this node (that is, the number that was passed to add_child()). More... | |
| Children | get_children (Thread *current_thread=Thread::get_current_thread()) const |
| DrawMask | get_draw_control_mask () const |
| DrawMask | get_draw_show_mask () const |
| int | get_fancy_bits (Thread *current_thread=Thread::get_current_thread()) const |
| Returns the union of all of the enum FancyBits values corresponding to the various "fancy" attributes that are set on the node. More... | |
| virtual int | get_first_visible_child () const |
| Returns the index number of the first visible child of this node, or a number >= get_num_children() if there are no visible children of this node. More... | |
| int | get_internal_vertices (Thread *current_thread=Thread::get_current_thread()) const |
| CollideMask | get_into_collide_mask () const |
| virtual CollideMask | get_legal_collide_mask () const |
| int | get_nested_vertices (Thread *current_thread=Thread::get_current_thread()) const |
| CollideMask | get_net_collide_mask (Thread *current_thread=Thread::get_current_thread()) const |
| Returns the union of all into_collide_mask() values set at CollisionNodes at this level and below. More... | |
| DrawMask | get_net_draw_control_mask () const |
| Returns the set of bits in get_net_draw_show_mask() that have been explicitly set via adjust_draw_mask(), rather than implicitly inherited. More... | |
| DrawMask | get_net_draw_show_mask () const |
| Returns the union of all draw_show_mask values–of renderable nodes only– at this level and below. More... | |
| virtual int | get_next_visible_child (int n) const |
| Returns the index number of the next visible child of this node following the indicated child, or a number >= get_num_children() if there are no more visible children of this node. More... | |
| int | get_num_children (Thread *current_thread=Thread::get_current_thread()) const |
| int | get_num_parents (Thread *current_thread=Thread::get_current_thread()) const |
| int | get_num_stashed (Thread *current_thread=Thread::get_current_thread()) const |
| size_t | get_num_tags () const |
| PandaNode * | get_parent (int n, Thread *current_thread=Thread::get_current_thread()) const |
| Parents | get_parents (Thread *current_thread=Thread::get_current_thread()) const |
| PandaNode * | get_stashed (int n, Thread *current_thread=Thread::get_current_thread()) const |
| Stashed | get_stashed (Thread *current_thread=Thread::get_current_thread()) const |
| int | get_stashed_sort (int n, Thread *current_thread=Thread::get_current_thread()) const |
| Returns the sort index of the nth stashed node of this node (that is, the number that was passed to add_child()). More... | |
| std::string | get_tag (const std::string &key, Thread *current_thread=Thread::get_current_thread()) const |
| std::string | get_tag_key (size_t i) const |
| void | get_tag_keys (vector_string &keys) const |
| Fills the given vector up with the list of tags on this PandaNode. More... | |
| unsigned int | get_unexpected_change (unsigned int flags) const |
| Returns nonzero if any of the bits in the input parameter are set on this node, or zero if none of them are set. More... | |
| virtual int | get_unsafe_to_apply_attribs () const |
| Returns the union of all attributes from SceneGraphReducer::AttribTypes that may not safely be applied to the vertices of this node. More... | |
| virtual int | get_visible_child () const |
| Returns the index number of the currently visible child of this node. More... | |
| bool | has_attrib (TypeHandle type) const |
| bool | has_attrib (int slot) const |
| bool | has_dirty_prev_transform () const |
| bool | has_effect (TypeHandle type) const |
| virtual bool | has_selective_visibility () const |
| Should be overridden by derived classes to return true if this kind of node has some restrictions on the set of children that should be rendered. More... | |
| virtual bool | has_single_child_visibility () const |
| Should be overridden by derived classes to return true if this kind of node has the special property that just one of its children is visible at any given time, and furthermore that the particular visible child can be determined without reference to any external information (such as a camera). More... | |
| bool | has_tag (const std::string &key, Thread *current_thread=Thread::get_current_thread()) const |
| bool | has_tags () const |
| virtual bool | is_ambient_light () const |
| Returns true if this is an AmbientLight, false if it is not a light, or it is some other kind of light. More... | |
| bool | is_bounds_stale () const |
| virtual bool | is_collision_node () const |
| A simple downcast check. More... | |
| bool | is_final (Thread *current_thread=Thread::get_current_thread()) const |
| virtual bool | is_geom_node () const |
| A simple downcast check. More... | |
| virtual bool | is_lod_node () const |
| A simple downcast check. More... | |
| bool | is_overall_hidden () const |
| virtual bool | is_renderable () const |
| Returns true if there is some value to visiting this particular node during the cull traversal for any camera, false otherwise. More... | |
| bool | is_scene_root () const |
| Returns true if this particular node is known to be the render root of some active DisplayRegion associated with the global GraphicsEngine, false otherwise. More... | |
| bool | is_under_scene_root () const |
| Returns true if this particular node is in a live scene graph: that is, it is a child or descendent of a node that is itself a scene root. More... | |
| void | list_tags (std::ostream &out, const std::string &separator="\n") const |
| Writes a list of all the tag keys assigned to the node to the indicated stream. More... | |
| void | ls (std::ostream &out, int indent_level) const |
| void | mark_bounds_stale (Thread *current_thread=Thread::get_current_thread()) const |
| void | mark_internal_bounds_stale (Thread *current_thread=Thread::get_current_thread()) |
| virtual void | output (std::ostream &out) const |
| void | prepare_scene (GraphicsStateGuardianBase *gsg, const RenderState *node_state) |
| virtual bool | preserve_name () const |
| Returns true if the node's name has extrinsic meaning and must be preserved across a flatten operation, false otherwise. More... | |
| PT (PandaNode) copy_subgraph(Thread *current_thread | |
| virtual void | r_prepare_scene (GraphicsStateGuardianBase *gsg, const RenderState *node_state, GeomTransformer &transformer, Thread *current_thread) |
| The recursive implementation of prepare_scene(). More... | |
| void | remove_all_children (Thread *current_thread=Thread::get_current_thread()) |
| Removes all the children from the node at once, including stashed children. More... | |
| void | remove_child (int child_index, Thread *current_thread=Thread::get_current_thread()) |
| Removes the nth child from the node. More... | |
| bool | remove_child (PandaNode *child_node, Thread *current_thread=Thread::get_current_thread()) |
| Removes the indicated child from the node. More... | |
| void | remove_stashed (int child_index, Thread *current_thread=Thread::get_current_thread()) |
| Removes the nth stashed child from the node. More... | |
| bool | replace_child (PandaNode *orig_child, PandaNode *new_child, Thread *current_thread=Thread::get_current_thread()) |
| Searches for the orig_child node in the node's list of children, and replaces it with the new_child instead. More... | |
| void | replace_node (PandaNode *other) |
| Inserts this node into the scene graph in place of the other one, and removes the other node. More... | |
| void | reset_prev_transform (Thread *current_thread=Thread::get_current_thread()) |
| Resets the transform that represents this node's "previous" position to the same as the current transform. More... | |
| virtual bool | safe_to_combine () const |
| Returns true if it is generally safe to combine this particular kind of PandaNode with other kinds of PandaNodes of compatible type, adding children or whatever. More... | |
| virtual bool | safe_to_combine_children () const |
| Returns true if it is generally safe to combine the children of this PandaNode with each other. More... | |
| virtual bool | safe_to_flatten_below () const |
| Returns true if a flatten operation may safely continue past this node, or false if nodes below this node may not be molested. More... | |
| virtual bool | safe_to_modify_transform () const |
| Returns true if it is safe to automatically adjust the transform on this kind of node. More... | |
| void | set_attrib (const RenderAttrib *attrib, int override=0) |
| Adds the indicated render attribute to the scene graph on this node. More... | |
| void | set_bound (const BoundingVolume *volume) |
| Deprecated. More... | |
| void | set_bounds (const BoundingVolume *volume) |
| Resets the bounding volume so that it is the indicated volume. More... | |
| void | set_bounds_type (BoundingVolume::BoundsType bounds_type) |
| Specifies the desired type of bounding volume that will be created for this node. More... | |
| void | set_effect (const RenderEffect *effect) |
| Adds the indicated render effect to the scene graph on this node. More... | |
| void | set_effects (const RenderEffects *effects, Thread *current_thread=Thread::get_current_thread()) |
| void | set_final (bool flag) |
| void | set_into_collide_mask (CollideMask mask) |
| void | set_overall_hidden (bool overall_hidden) |
| void | set_prev_transform (const TransformState *transform, Thread *current_thread=Thread::get_current_thread()) |
| Sets the transform that represents this node's "previous" position, one frame ago, for the purposes of detecting motion for accurate collision calculations. More... | |
| void | set_state (const RenderState *state, Thread *current_thread=Thread::get_current_thread()) |
| void | set_tag (const std::string &key, const std::string &value, Thread *current_thread=Thread::get_current_thread()) |
| void | set_transform (const TransformState *transform, Thread *current_thread=Thread::get_current_thread()) |
| void | set_unexpected_change (unsigned int flags) |
| Sets one or more of the PandaNode::UnexpectedChange bits on, indicating that the corresponding property should not change again on this node. More... | |
| bool | stash_child (PandaNode *child_node, Thread *current_thread=Thread::get_current_thread()) |
| Stashes the indicated child node. More... | |
| void | stash_child (int child_index, Thread *current_thread=Thread::get_current_thread()) |
| Stashes the indicated child node. More... | |
| void | steal_children (PandaNode *other, Thread *current_thread=Thread::get_current_thread()) |
| Moves all the children from the other node onto this node. More... | |
| bool | unstash_child (PandaNode *child_node, Thread *current_thread=Thread::get_current_thread()) |
| Returns the indicated stashed node to normal child status. More... | |
| void | unstash_child (int stashed_index, Thread *current_thread=Thread::get_current_thread()) |
| Returns the indicated stashed node to normal child status. More... | |
| virtual void | update_bam_nested (BamWriter *manager) |
| Called by the BamWriter when this object has not itself been modified recently, but it should check its nested objects for updates. More... | |
| void | write_recorder (BamWriter *manager, Datagram &dg) |
| This method is provided for the benefit of classes (like MouseRecorder) that inherit from PandaMode and also RecorderBase. More... | |
| virtual void | xform (const LMatrix4 &mat) |
| Transforms the contents of this PandaNode by the indicated matrix, if it means anything to do so. More... | |
| Public Member Functions inherited from TypedWritableReferenceCount | |
| TypedWritableReferenceCount (const TypedWritableReferenceCount ©) | |
| virtual ReferenceCount * | as_reference_count () |
| Returns the pointer cast to a ReferenceCount pointer, if it is in fact of that type. More... | |
| void | operator= (const TypedWritableReferenceCount ©) |
| Public Member Functions inherited from TypedWritable | |
| TypedWritable (const TypedWritable ©) | |
| vector_uchar | encode_to_bam_stream () const |
| Converts the TypedWritable object into a single stream of data using a BamWriter, and returns that data as a bytes object. More... | |
| bool | encode_to_bam_stream (vector_uchar &data, BamWriter *writer=nullptr) const |
| Converts the TypedWritable object into a single stream of data using a BamWriter, and stores that data in the indicated string. More... | |
| virtual void | finalize (BamReader *manager) |
| Called by the BamReader to perform any final actions needed for setting up the object after all objects have been read and all pointers have been completed. More... | |
| UpdateSeq | get_bam_modified () const |
| Returns the current bam_modified counter. More... | |
| void | mark_bam_modified () |
| Increments the bam_modified counter, so that this object will be invalidated and retransmitted on any open bam streams. More... | |
| void | operator= (const TypedWritable ©) |
| virtual bool | require_fully_complete () const |
| Some objects require all of their nested pointers to have been completed before the objects themselves can be completed. More... | |
| Public Member Functions inherited from TypedObject | |
| TypedObject (const TypedObject ©)=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 ©)=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 NurbsCurveInterface | |
| int | append_cv (PN_stdfloat x, PN_stdfloat y, PN_stdfloat z) |
| int | append_cv (const LVecBase3 &v) |
| int | append_cv (const LVecBase4 &v) |
| LVecBase3 | get_cv_point (int n) const |
| Returns the position of the indicated CV. More... | |
| PN_stdfloat | get_cv_weight (int n) const |
| Returns the weight of the indicated CV. More... | |
| bool | set_cv_point (int n, PN_stdfloat x, PN_stdfloat y, PN_stdfloat z) |
| Repositions the indicated CV. More... | |
| bool | set_cv_point (int n, const LVecBase3 &v) |
| Repositions the indicated CV. More... | |
| bool | set_cv_weight (int n, PN_stdfloat w) |
| Sets the weight of the indicated CV without affecting its position in 3-d space. More... | |
| void | write_cv (std::ostream &out, int n) const |
Static Public Member Functions | |
| static TypeHandle | get_class_type () |
| static void | init_type () |
| static void | register_with_read_factory () |
| Initializes the factory for reading these things from Bam files. More... | |
| Static Public Member Functions inherited from PiecewiseCurve | |
| static TypeHandle | get_class_type () |
| static void | init_type () |
| Static Public Member Functions inherited from ParametricCurve | |
| static TypeHandle | get_class_type () |
| static void | init_type () |
| Static Public Member Functions inherited from PandaNode | |
| static DrawMask | get_all_camera_mask () |
| static TypeHandle | get_class_type () |
| static DrawMask | get_overall_bit () |
| static void | init_type () |
| static | PT (PandaNode) decode_from_bam_stream(vector_uchar data |
| static void | register_with_read_factory () |
| Tells the BamReader how to create objects of type PandaNode. More... | |
| static void | reset_all_prev_transform (Thread *current_thread=Thread::get_current_thread()) |
| Visits all nodes in the world with the _dirty_prev_transform flag–that is, all nodes whose _prev_transform is different from the _transform in pipeline stage 0–and resets the _prev_transform to be the same as _transform. More... | |
| static void | set_scene_root_func (SceneRootFunc *func) |
| This is used by the GraphicsEngine to hook in a pointer to the scene_root_func(), the function to determine whether the node is an active scene root. More... | |
| Static Public Member Functions inherited from TypedWritableReferenceCount | |
| static TypeHandle | get_class_type () |
| static void | init_type () |
| static | PT (TypedWritableReferenceCount) decode_from_bam_stream(vector_uchar data |
| Static Public Member Functions inherited from TypedWritable | |
| static bool | decode_raw_from_bam_stream (TypedWritable *&ptr, ReferenceCount *&ref_ptr, vector_uchar data, BamReader *reader=nullptr) |
| Reads the bytes created by a previous call to encode_to_bam_stream(), and extracts the single object on those bytes. More... | |
| 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 NurbsCurveInterface | |
| static TypeHandle | get_class_type () |
| static void | init_type () |
Additional Inherited Members | |
| Public Types inherited from ParametricCurve | |
| typedef pvector< BezierSeg > | BezierSegs |
| Public Types inherited from PandaNode | |
| enum | FancyBits { FB_transform = 0x0001, FB_state = 0x0002, FB_effects = 0x0004, FB_tag = 0x0010, FB_draw_mask = 0x0020, FB_cull_callback = 0x0040 } |
| typedef bool | SceneRootFunc(const PandaNode *) |
| enum | UnexpectedChange { UC_parents = 0x001, UC_children = 0x002, UC_transform = 0x004, UC_state = 0x008, UC_draw_mask = 0x010 } |
| Public Attributes inherited from PandaNode | |
| clear_tag | |
| Removes the value defined for this key on this particular node. More... | |
| virtual LPoint3 bool const TransformState Thread * | current_thread = Thread::get_current_thread()) const |
| Thread * | current_thread = Thread::get_current_thread()) const |
| virtual LPoint3 bool & | found_any |
| get_all_camera_mask | |
| Returns a DrawMask that is appropriate for rendering to all cameras. More... | |
| get_bounds_type | |
| Returns the bounding volume type set with set_bounds_type(). More... | |
| get_child | |
| Returns the nth child node of this node. More... | |
| get_children | |
| Returns an object that can be used to walk through the list of children of the node. More... | |
| get_draw_control_mask | |
| Returns the set of bits in draw_show_mask that are considered meaningful. More... | |
| get_draw_show_mask | |
| Returns the hide/show bits of this particular node. More... | |
| get_effects | |
| get_internal_bounds | |
| get_internal_vertices | |
| get_into_collide_mask | |
| Returns the "into" collide mask for this node. More... | |
| get_legal_collide_mask | |
| Returns the subset of CollideMask bits that may be set for this particular type of PandaNode. More... | |
| get_nested_vertices | |
| get_num_children | |
| Returns the number of child nodes this node has. More... | |
| get_num_parents | |
| Returns the number of parent nodes this node has. More... | |
| get_num_stashed | |
| Returns the number of stashed nodes this node has. More... | |
| get_num_tags | |
| get_overall_bit | |
| get_parent | |
| Returns the nth parent node of this node. More... | |
| get_parents | |
| Returns an object that can be used to walk through the list of parents of the node, similar to get_children() and get_stashed(). More... | |
| get_prev_transform | |
| get_python_tags | |
| get_stashed | |
| Returns the nth stashed child of this node. More... | |
| get_state | |
| get_tag | |
| get_tag_key | |
| get_transform | |
| has_tag | |
| is_bounds_stale | |
| is_final | |
| Returns the current state of the "final" flag. More... | |
| is_overall_hidden | |
| Returns true if the node has been hidden to all cameras by clearing its overall bit. More... | |
| virtual LPoint3 & | max_point |
| static BamReader * | reader = nullptr) |
| set_effects | |
| Sets the complete RenderEffects that will be applied this node. More... | |
| set_final | |
| set_into_collide_mask | |
| Sets the "into" CollideMask. More... | |
| set_overall_hidden | |
| Sets or clears the hidden flag. More... | |
| set_state | |
| Sets the complete RenderState that will be applied to all nodes at this level and below. More... | |
| set_tag | |
| Associates a user-defined value with a user-defined key which is stored on the node. More... | |
| set_transform | |
| Sets the transform that will be applied to this node and below. More... | |
| virtual LPoint3 bool const TransformState * | transform |
| Public Attributes inherited from TypedWritableReferenceCount | |
| static BamReader * | reader = nullptr) |
| 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 NurbsCurveInterface | |
| get_cv | |
| get_knot | |
| get_num_cvs | |
| get_num_knots | |
| Static Public Attributes inherited from TypedWritable | |
| static TypedWritable *const | Null = nullptr |
Detailed Description
A Nonuniform Rational B-Spline.
This class is actually implemented as a PiecewiseCurve made up of several CubicCurvesegs, each of which is created using the nurbs_basis() method. The list of CV's and knots is kept here, within the NurbsCurve class.
This class is the original Panda-native implementation of a NURBS curve. It is typedeffed as "NurbsCurve" and performs all NURBS curve functions if we do not have the NURBS++ library available.
However, if we *do* have the NURBS++ library, another class exists, the NurbsPPCurve, which is a wrapper around that library and provides some additional functionality. In that case, the other class is typedeffed to "NurbsCurve" instead of this one, and performs most of the NURBS curve functions. This class then becomes vestigial.
Definition at line 41 of file nurbsCurve.h.
Constructor & Destructor Documentation
◆ NurbsCurve() [1/2]
| NurbsCurve::NurbsCurve | ( | const ParametricCurve & | pc | ) |
Constructs a NURBS curve equivalent to the indicated (possibly non-NURBS) curve.
Definition at line 39 of file nurbsCurve.cxx.
References ParametricCurve::convert_to_nurbs().
◆ NurbsCurve() [2/2]
| NurbsCurve::NurbsCurve | ( | int | order, |
| int | num_cvs, | ||
| const PN_stdfloat | knots[], | ||
| const LVecBase4 | cvs[] | ||
| ) |
Constructs a NURBS curve according to the indicated NURBS parameters.
Definition at line 52 of file nurbsCurve.cxx.
Member Function Documentation
◆ convert_to_nurbs()
|
virtual |
Stores in the indicated NurbsCurve a NURBS representation of an equivalent curve.
Returns true if successful, false otherwise.
Reimplemented from ParametricCurve.
Definition at line 434 of file nurbsCurve.cxx.
References ParametricCurve::set_curve_type().
◆ get_cv()
|
virtual |
Returns the position in homogeneous space of the indicated CV.
Implements NurbsCurveInterface.
Definition at line 221 of file nurbsCurve.cxx.
◆ get_knot()
|
virtual |
Retrieves the value of the indicated knot.
Implements NurbsCurveInterface.
Definition at line 249 of file nurbsCurve.cxx.
Referenced by recompute().
◆ get_num_knots()
|
virtual |
Returns the number of knots on the curve.
Implements NurbsCurveInterface.
Definition at line 119 of file nurbsCurve.cxx.
◆ get_nurbs_interface()
|
virtual |
Returns a pointer to the object as a NurbsCurveInterface object if it happens to be a NURBS-style curve; otherwise, returns NULL.
Reimplemented from ParametricCurve.
Definition at line 425 of file nurbsCurve.cxx.
◆ insert_cv()
|
virtual |
Inserts a new CV into the middle of the curve at the indicated parametric value.
This doesn't change the shape or timing of the curve; however, it is irreversible: if the new CV is immediately removed, the curve will be changed. Returns true if successful, false otherwise.
Implements NurbsCurveInterface.
Definition at line 132 of file nurbsCurve.cxx.
◆ make_copy()
|
virtual |
Returns a newly-allocated PandaNode that is a shallow copy of this one.
It will be a different pointer, but its internal data may or may not be shared with that of the original PandaNode. No children will be copied.
Reimplemented from PandaNode.
Definition at line 83 of file nurbsCurve.cxx.
◆ rebuild_curveseg()
|
virtual |
Rebuilds the current curve segment (as selected by the most recent call to find_curve()) according to the specified properties (see CubicCurveseg::compute_seg).
Returns true if possible, false if something goes horribly wrong.
Reimplemented from PiecewiseCurve.
Definition at line 303 of file nurbsCurve.cxx.
◆ recompute()
|
virtual |
Recalculates the curve basis according to the latest position of the CV's, knots, etc.
Until this function is called, adjusting the NURBS parameters will have no visible effect on the curve. Returns true if the resulting curve is valid, false otherwise.
Reimplemented from ParametricCurve.
Definition at line 267 of file nurbsCurve.cxx.
References get_knot(), and PiecewiseCurve::insert_curveseg().
◆ register_with_read_factory()
|
static |
Initializes the factory for reading these things from Bam files.
Definition at line 487 of file nurbsCurve.cxx.
References BamReader::get_factory(), and Factory< Type >::register_factory().
◆ remove_all_cvs()
|
virtual |
Removes all CV's from the curve.
Implements NurbsCurveInterface.
Definition at line 201 of file nurbsCurve.cxx.
◆ remove_cv()
|
virtual |
Removes the indicated CV from the curve.
Returns true if the CV index was valid, false otherwise.
Implements NurbsCurveInterface.
Definition at line 188 of file nurbsCurve.cxx.
◆ set_cv()
|
virtual |
Repositions the indicated CV.
Returns true if successful, false otherwise.
Implements NurbsCurveInterface.
Definition at line 210 of file nurbsCurve.cxx.
◆ set_knot()
|
virtual |
Sets the value of the indicated knot.
There are get_num_cvs() + _order knot values, but the first _order - 1 and the last 1 knot values cannot be changed. It is also an error to set a knot value outside the range of its neighbors.
Implements NurbsCurveInterface.
Definition at line 235 of file nurbsCurve.cxx.
◆ set_order()
|
virtual |
Changes the order of the curve.
Must be a value from 1 to 4. Can only be done when there are no cv's.
Implements NurbsCurveInterface.
Definition at line 92 of file nurbsCurve.cxx.
◆ stitch()
|
virtual |
Regenerates this curve as one long curve: the first curve connected end-to- end with the second one.
Either a or b may be the same as 'this'.
Returns true if successful, false on failure or if the curve type does not support stitching.
Reimplemented from ParametricCurve.
Definition at line 374 of file nurbsCurve.cxx.
The documentation for this class was generated from the following files:
- panda/src/parametrics/nurbsCurve.h
- panda/src/parametrics/nurbsCurve.cxx
- panda/src/parametrics/nurbsCurve.I
