Panda3D
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A cuboid collision volume or object. More...
#include "collisionBox.h"
Classes | |
class | PointDef |
Public Types | |
typedef pvector< PointDef > | Points |
Public Member Functions | |
CollisionBox (const LPoint3 ¢er, PN_stdfloat x, PN_stdfloat y, PN_stdfloat z) | |
Create the Box by giving a Center and distances of of each of the sides of box from the Center. More... | |
CollisionBox (const LPoint3 &min, const LPoint3 &max) | |
Create the Box by Specifying the Diagonal Points. More... | |
CollisionBox (const CollisionBox ©) | |
bool | apply_clip_plane (Points &new_points, const ClipPlaneAttrib *cpa, const TransformState *net_transform, int plane_no) const |
Clips the polygon by all of the clip planes named in the clip plane attribute and fills new_points up with the resulting points. More... | |
void | calc_to_3d_mat (LMatrix4 &to_3d_mat, int plane) const |
Fills the indicated matrix with the appropriate rotation transform to move points from the 2-d plane into the 3-d (X, 0, Z) plane. More... | |
bool | clip_polygon (Points &new_points, const Points &source_points, const LPlane &plane, int plane_no) const |
Clips the source_points of the polygon by the indicated clipping plane, and modifies new_points to reflect the new set of clipped points (but does not compute the vectors in new_points). More... | |
PN_stdfloat | dist_to_polygon (const LPoint2 &p, const Points &points) const |
Returns the linear distance from the 2-d point to the nearest part of the polygon defined by the points vector. More... | |
void | draw_polygon (GeomNode *viz_geom_node, GeomNode *bounds_viz_geom_node, const Points &points) const |
virtual TypeHandle | force_init_type () |
virtual LPoint3 | get_approx_center () const |
const LPoint3 & | get_center () const |
virtual LPoint3 | get_collision_origin () const |
Returns the point in space deemed to be the "origin" of the solid for collision purposes. More... | |
virtual LPoint3 | get_max () const |
virtual LPoint3 | get_min () const |
int | get_num_planes () const |
Returns 6: the number of faces of a rectangular solid. More... | |
int | get_num_points () const |
Returns 8: the number of vertices of a rectangular solid. More... | |
LPlane | get_plane (int n) const |
Returns the nth face of the rectangular solid. More... | |
Points | get_plane_points (int n) |
returns the points that form the nth plane More... | |
LPoint3 | get_point (int n) const |
Returns the nth vertex of the OBB. More... | |
LPoint3 | get_point_aabb (int n) const |
Returns the nth vertex of the Axis Aligned Bounding Box. More... | |
PN_stdfloat | get_radius () const |
virtual PStatCollector & | get_test_pcollector () |
Returns a PStatCollector that is used to count the number of intersection tests made against a solid of this type in a given frame. More... | |
virtual TypeHandle | get_type () const |
virtual PStatCollector & | get_volume_pcollector () |
Returns a PStatCollector that is used to count the number of bounding volume tests made against a solid of this type in a given frame. More... | |
LPoint3 | legacy_to_3d (const LVecBase2 &point2d, int axis) const |
virtual CollisionSolid * | make_copy () |
virtual void | output (ostream &out) const |
bool | point_is_inside (const LPoint2 &p, const Points &points) const |
Returns true if the indicated point is within the polygon's 2-d space, false otherwise. More... | |
virtual | PT (CollisionEntry) test_intersection(const CollisionEntry &entry) const |
void | rederive_to_3d_mat (LMatrix4 &to_3d_mat, int plane) const |
Fills the indicated matrix with the appropriate rotation transform to move points from the 2-d plane into the 3-d (X, 0, Z) plane. More... | |
void | set_center (const LPoint3 ¢er) |
void | set_center (PN_stdfloat x, PN_stdfloat y, PN_stdfloat z) |
LPlane | set_plane (int n) const |
Creates the nth face of the rectangular solid. More... | |
void | setup_box () |
Compute parameters for each of the box's sides. More... | |
void | setup_points (const LPoint3 *begin, const LPoint3 *end, int plane) |
Computes the plane and 2d projection of points that make up this side. More... | |
LPoint2 | to_2d (const LVecBase3 &point3d, int plane) const |
Assuming the indicated point in 3-d space lies within the polygon's plane, returns the corresponding point in the polygon's 2-d definition space. More... | |
virtual void | write_datagram (BamWriter *manager, Datagram &me) |
Function to write the important information in the particular object to a Datagram. More... | |
virtual void | xform (const LMatrix4 &mat) |
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CollisionSolid (const CollisionSolid ©) | |
void | clear_effective_normal () |
Removes the normal previously set by set_effective_normal(). More... | |
CPT (BoundingVolume) get_bounds() const | |
const LVector3 & | get_effective_normal () const |
Returns the normal that was set by set_effective_normal(). More... | |
bool | get_respect_effective_normal () const |
See set_respect_effective_normal(). More... | |
bool | has_effective_normal () const |
Returns true if a special normal was set by set_effective_normal(), false otherwise. More... | |
bool | is_tangible () const |
Returns whether the solid is considered 'tangible' or not. More... | |
virtual | PT (PandaNode) get_viz(const CullTraverser *trav |
void | set_bounds (const BoundingVolume &bounding_volume) |
void | set_effective_normal (const LVector3 &effective_normal) |
Records a false normal for this CollisionSolid that will be reported by the collision system with all collisions into it, instead of its actual normal. More... | |
void | set_respect_effective_normal (bool respect_effective_normal) |
This is only meaningful for CollisionSolids that will be added to a traverser as colliders. More... | |
void | set_tangible (bool tangible) |
Sets the current state of the 'tangible' flag. More... | |
virtual void | write (ostream &out, int indent_level=0) const |
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CopyOnWriteObject (const CopyOnWriteObject ©) | |
void | operator= (const CopyOnWriteObject ©) |
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void | cache_ref () const |
Explicitly increments the cache reference count and the normal reference count simultaneously. More... | |
bool | cache_unref () const |
Explicitly decrements the cache reference count and the normal reference count simultaneously. More... | |
int | get_cache_ref_count () const |
Returns the current reference count. More... | |
bool | test_ref_count_integrity () const |
Does some easy checks to make sure that the reference count isn't completely bogus. More... | |
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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 ©) |
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TypedWritable (const TypedWritable ©) | |
virtual int | complete_pointers (TypedWritable **p_list, BamReader *manager) |
Receives an array of pointers, one for each time manager->read_pointer() was called in fillin(). More... | |
string | encode_to_bam_stream () const |
Converts the TypedWritable object into a single stream of data using a BamWriter, and returns that data as a string string. More... | |
bool | encode_to_bam_stream (string &data, BamWriter *writer=NULL) 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... | |
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... | |
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TypedObject (const TypedObject ©) | |
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... | |
void | operator= (const TypedObject ©) |
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int | get_ref_count () const |
Returns the current reference count. More... | |
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 | 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... | |
void | weak_ref (WeakPointerToVoid *ptv) |
Adds the indicated PointerToVoid as a weak reference to this object. More... | |
void | weak_unref (WeakPointerToVoid *ptv) |
Removes the indicated PointerToVoid as a weak reference to this object. More... | |
Static Public Member Functions | |
static void | compute_vectors (Points &points) |
Now that the _p members of the given points array have been computed, go back and compute all of the _v members. More... | |
static void | flush_level () |
Flushes the PStatCollectors used during traversal. More... | |
static TypeHandle | get_class_type () |
static void | init_type () |
static void | register_with_read_factory () |
Factory method to generate a CollisionBox object. More... | |
static LPoint3 | to_3d (const LVecBase2 &point2d, const LMatrix4 &to_3d_mat) |
Extrude the indicated point in the polygon's 2-d definition space back into 3-d coordinates. More... | |
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static TypeHandle | get_class_type () |
static void | init_type () |
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static TypeHandle | get_class_type () |
static void | init_type () |
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static TypeHandle | get_class_type () |
static void | init_type () |
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static TypeHandle | get_class_type () |
static void | init_type () |
static | PT (TypedWritableReferenceCount) decode_from_bam_stream(const string &data |
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static bool | decode_raw_from_bam_stream (TypedWritable *&ptr, ReferenceCount *&ref_ptr, const string &data, BamReader *reader=NULL) |
Reads the string created by a previous call to encode_to_bam_stream(), and extracts the single object on that string. More... | |
static TypeHandle | get_class_type () |
static void | init_type () |
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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... | |
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static TypeHandle | get_class_type () |
static void | init_type () |
Additional Inherited Members | |
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virtual const CullTraverserData bool bounds_only | const |
virtual const CullTraverserData & | data |
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static BamReader * | reader = NULL) |
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static TypedWritable *const | Null = (TypedWritable*)0L |
A cuboid collision volume or object.
Definition at line 30 of file collisionBox.h.
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Create the Box by giving a Center and distances of of each of the sides of box from the Center.
Definition at line 23 of file collisionBox.I.
References get_point_aabb(), set_plane(), and setup_box().
Create the Box by Specifying the Diagonal Points.
Definition at line 42 of file collisionBox.I.
References flush_level(), get_point_aabb(), set_plane(), and setup_box().
bool CollisionBox::apply_clip_plane | ( | CollisionBox::Points & | new_points, |
const ClipPlaneAttrib * | cpa, | ||
const TransformState * | net_transform, | ||
int | plane_no | ||
) | const |
Clips the polygon by all of the clip planes named in the clip plane attribute and fills new_points up with the resulting points.
The return value is true if the set of points is unmodified (all points are behind all the clip planes), or false otherwise.
Definition at line 714 of file collisionBox.cxx.
References clip_polygon(), compute_vectors(), PlaneNode::get_clip_effect(), ClipPlaneAttrib::get_num_on_planes(), ClipPlaneAttrib::get_on_plane(), PlaneNode::get_plane(), and NodePath::node().
Referenced by get_test_pcollector().
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Fills the indicated matrix with the appropriate rotation transform to move points from the 2-d plane into the 3-d (X, 0, Z) plane.
Definition at line 261 of file collisionBox.I.
References get_plane(), get_point(), rederive_to_3d_mat(), and LMatrix4f::set_row().
Referenced by setup_points(), and to_2d().
bool CollisionBox::clip_polygon | ( | CollisionBox::Points & | new_points, |
const Points & | source_points, | ||
const LPlane & | plane, | ||
int | plane_no | ||
) | const |
Clips the source_points of the polygon by the indicated clipping plane, and modifies new_points to reflect the new set of clipped points (but does not compute the vectors in new_points).
The return value is true if the set of points is unmodified (all points are behind the clip plane), or false otherwise.
Definition at line 764 of file collisionBox.cxx.
References dist_to_polygon(), get_plane(), get_point(), and to_2d().
Referenced by apply_clip_plane().
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Now that the _p members of the given points array have been computed, go back and compute all of the _v members.
Definition at line 1041 of file collisionBox.cxx.
References register_with_read_factory().
Referenced by apply_clip_plane(), point_is_inside(), and setup_points().
Returns the linear distance from the 2-d point to the nearest part of the polygon defined by the points vector.
The result is negative if the point is within the polygon.
Definition at line 852 of file collisionBox.cxx.
References LVecBase2f::length(), and point_is_inside().
Referenced by clip_polygon(), and get_test_pcollector().
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inlinestatic |
Flushes the PStatCollectors used during traversal.
Definition at line 96 of file collisionBox.I.
References get_num_points().
Referenced by CollisionTraverser::clear_colliders(), and CollisionBox().
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Returns the point in space deemed to be the "origin" of the solid for collision purposes.
The closest intersection point to this origin point is considered to be the most significant.
Implements CollisionSolid.
Definition at line 174 of file collisionBox.cxx.
References get_volume_pcollector().
Referenced by setup_points().
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Returns 6: the number of faces of a rectangular solid.
Definition at line 186 of file collisionBox.I.
References get_plane().
Referenced by get_point_aabb().
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Returns 8: the number of vertices of a rectangular solid.
Definition at line 149 of file collisionBox.I.
References get_point().
Referenced by flush_level().
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Returns the nth face of the rectangular solid.
Definition at line 196 of file collisionBox.I.
References set_plane().
Referenced by calc_to_3d_mat(), clip_polygon(), get_num_planes(), and get_test_pcollector().
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returns the points that form the nth plane
Definition at line 349 of file collisionBox.I.
Referenced by to_3d().
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Returns the nth vertex of the OBB.
Definition at line 159 of file collisionBox.I.
References get_point_aabb(), and LPoint3f::zero().
Referenced by calc_to_3d_mat(), clip_polygon(), get_num_points(), set_plane(), and setup_box().
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Returns the nth vertex of the Axis Aligned Bounding Box.
Definition at line 171 of file collisionBox.I.
References get_num_planes(), and LPoint3f::zero().
Referenced by CollisionBox(), and get_point().
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Returns a PStatCollector that is used to count the number of intersection tests made against a solid of this type in a given frame.
Reimplemented from CollisionSolid.
Definition at line 228 of file collisionBox.cxx.
References apply_clip_plane(), dist_to_polygon(), CollisionSolid::get_effective_normal(), CollisionEntry::get_from(), CollisionEntry::get_from_node_path(), CollisionEntry::get_into_node_path(), get_plane(), CollisionSolid::get_respect_effective_normal(), CollisionSolid::has_effective_normal(), LVecBase3f::length_squared(), point_is_inside(), GeomVertexWriter::set_data3(), and to_2d().
Referenced by get_volume_pcollector().
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Returns a PStatCollector that is used to count the number of bounding volume tests made against a solid of this type in a given frame.
Reimplemented from CollisionSolid.
Definition at line 216 of file collisionBox.cxx.
References get_test_pcollector().
Referenced by get_collision_origin().
Returns true if the indicated point is within the polygon's 2-d space, false otherwise.
Definition at line 1015 of file collisionBox.cxx.
References compute_vectors().
Referenced by dist_to_polygon(), and get_test_pcollector().
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Fills the indicated matrix with the appropriate rotation transform to move points from the 2-d plane into the 3-d (X, 0, Z) plane.
This is essentially similar to calc_to_3d_mat, except that the matrix is rederived from whatever is stored in _to_2d_mat, guaranteeing that it will match whatever algorithm produced that one, even if it was produced on a different machine with different numerical precision.
Definition at line 290 of file collisionBox.I.
References LMatrix4f::invert_from(), and to_3d().
Referenced by calc_to_3d_mat().
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Factory method to generate a CollisionBox object.
Definition at line 1055 of file collisionBox.cxx.
References BamReader::get_factory(), Factory< Type >::register_factory(), and write_datagram().
Referenced by compute_vectors().
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Creates the nth face of the rectangular solid.
Definition at line 207 of file collisionBox.I.
References get_point(), and to_2d().
Referenced by CollisionBox(), get_plane(), and setup_points().
void CollisionBox::setup_box | ( | ) |
Compute parameters for each of the box's sides.
Definition at line 68 of file collisionBox.cxx.
References get_point(), and setup_points().
Referenced by CollisionBox(), and setup_points().
Computes the plane and 2d projection of points that make up this side.
Definition at line 86 of file collisionBox.cxx.
References calc_to_3d_mat(), compute_vectors(), get_collision_origin(), CollisionEntry::get_into(), LMatrix4f::invert_from(), set_plane(), and setup_box().
Referenced by setup_box().
Assuming the indicated point in 3-d space lies within the polygon's plane, returns the corresponding point in the polygon's 2-d definition space.
Definition at line 248 of file collisionBox.I.
References calc_to_3d_mat().
Referenced by clip_polygon(), get_test_pcollector(), and set_plane().
Extrude the indicated point in the polygon's 2-d definition space back into 3-d coordinates.
Definition at line 301 of file collisionBox.I.
References get_plane_points().
Referenced by rederive_to_3d_mat().
Function to write the important information in the particular object to a Datagram.
Reimplemented from CollisionSolid.
Definition at line 1066 of file collisionBox.cxx.
References Datagram::add_stdfloat(), Datagram::add_uint16(), DatagramIterator::get_stdfloat(), DatagramIterator::get_uint16(), LVecBase2f::read_datagram(), LVecBase3f::read_datagram(), LMatrix4f::read_datagram(), CollisionSolid::write_datagram(), LVecBase3f::write_datagram(), and LMatrix4f::write_datagram().
Referenced by register_with_read_factory().