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. | |
CollisionBox (const LPoint3 &min, const LPoint3 &max) | |
Create the Box by Specifying the Diagonal Points. | |
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. | |
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. | |
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). | |
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. | |
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. | |
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. | |
int | get_num_points () const |
Returns 8: the number of vertices of a rectangular solid. | |
LPlane | get_plane (int n) const |
Returns the nth face of the rectangular solid. | |
Points | get_plane_points (int n) |
returns the points that form the nth plane | |
LPoint3 | get_point (int n) const |
Returns the nth vertex of the OBB. | |
LPoint3 | get_point_aabb (int n) const |
Returns the nth vertex of the Axis Aligned Bounding Box. | |
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. | |
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. | |
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. | |
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. | |
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. | |
void | setup_box () |
Compute parameters for each of the box's sides. | |
void | setup_points (const LPoint3 *begin, const LPoint3 *end, int plane) |
Computes the plane and 2d projection of points that make up this side. | |
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. | |
virtual void | write_datagram (BamWriter *manager, Datagram &me) |
Function to write the important information in the particular object to a Datagram. | |
virtual void | xform (const LMatrix4 &mat) |
Transforms the solid by the indicated matrix. | |
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. | |
static void | flush_level () |
Flushes the PStatCollectors used during traversal. | |
static TypeHandle | get_class_type () |
static void | init_type () |
static void | register_with_read_factory () |
Factory method to generate a CollisionBox object. | |
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. | |
Protected Member Functions | |
CollisionBox () | |
Creates an invalid Box. | |
virtual void | fill_viz_geom () |
Fills the _viz_geom GeomNode up with Geoms suitable for rendering this solid. | |
void | fillin (DatagramIterator &scan, BamReader *manager) |
Function that reads out of the datagram (or asks manager to read) all of the data that is needed to re-create this object and stores it in the appropiate place. | |
virtual | PT (BoundingVolume) compute_internal_bounds() const |
virtual | PT (CollisionEntry) test_intersection_from_sphere(const CollisionEntry &entry) const |
virtual | PT (CollisionEntry) test_intersection_from_ray(const CollisionEntry &entry) const |
virtual | PT (CollisionEntry) test_intersection_from_segment(const CollisionEntry &entry) const |
virtual | PT (CollisionEntry) test_intersection_from_box(const CollisionEntry &entry) const |
Static Protected Member Functions | |
static TypedWritable * | make_CollisionBox (const FactoryParams ¶ms) |
Factory method to generate a CollisionBox object. |
A cuboid collision volume or object.
Definition at line 30 of file collisionBox.h.
CollisionBox::CollisionBox | ( | const LPoint3 & | center, |
PN_stdfloat | x, | ||
PN_stdfloat | y, | ||
PN_stdfloat | z | ||
) | [inline] |
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().
CollisionBox::CollisionBox | ( | const LPoint3 & | min, |
const LPoint3 & | max | ||
) | [inline] |
Create the Box by Specifying the Diagonal Points.
Definition at line 42 of file collisionBox.I.
References get_point_aabb(), set_plane(), and setup_box().
CollisionBox::CollisionBox | ( | ) | [inline, protected] |
Creates an invalid Box.
Only used when reading from a bam file.
Definition at line 64 of file collisionBox.I.
Referenced by make_CollisionBox().
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 678 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().
void CollisionBox::calc_to_3d_mat | ( | LMatrix4 & | to_3d_mat, |
int | plane | ||
) | const [inline] |
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(), and LMatrix4f::set_row().
Referenced by setup_points().
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 728 of file collisionBox.cxx.
References get_plane(), get_point(), and to_2d().
Referenced by apply_clip_plane().
void CollisionBox::compute_vectors | ( | Points & | points | ) | [static] |
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 1005 of file collisionBox.cxx.
Referenced by apply_clip_plane(), and setup_points().
PN_stdfloat CollisionBox::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.
The result is negative if the point is within the polygon.
Definition at line 816 of file collisionBox.cxx.
void CollisionBox::fill_viz_geom | ( | ) | [protected, virtual] |
Fills the _viz_geom GeomNode up with Geoms suitable for rendering this solid.
Reimplemented from CollisionSolid.
Definition at line 639 of file collisionBox.cxx.
References GeomVertexWriter::add_data3(), get_point(), and GeomVertexFormat::get_v3().
void CollisionBox::fillin | ( | DatagramIterator & | scan, |
BamReader * | manager | ||
) | [protected, virtual] |
Function that reads out of the datagram (or asks manager to read) all of the data that is needed to re-create this object and stores it in the appropiate place.
Reimplemented from CollisionSolid.
Definition at line 1082 of file collisionBox.cxx.
References DatagramIterator::get_stdfloat(), DatagramIterator::get_uint16(), LVecBase2f::read_datagram(), LVecBase3f::read_datagram(), and LMatrix4f::read_datagram().
Referenced by make_CollisionBox().
void CollisionBox::flush_level | ( | ) | [inline, static] |
Flushes the PStatCollectors used during traversal.
Definition at line 96 of file collisionBox.I.
LPoint3 CollisionBox::get_collision_origin | ( | ) | const [virtual] |
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 170 of file collisionBox.cxx.
int CollisionBox::get_num_planes | ( | ) | const [inline] |
Returns 6: the number of faces of a rectangular solid.
Definition at line 186 of file collisionBox.I.
int CollisionBox::get_num_points | ( | ) | const [inline] |
Returns 8: the number of vertices of a rectangular solid.
Definition at line 149 of file collisionBox.I.
LPlane CollisionBox::get_plane | ( | int | n | ) | const [inline] |
Returns the nth face of the rectangular solid.
Definition at line 196 of file collisionBox.I.
Referenced by calc_to_3d_mat(), and clip_polygon().
CollisionBox::Points CollisionBox::get_plane_points | ( | int | n | ) | [inline] |
returns the points that form the nth plane
Definition at line 349 of file collisionBox.I.
LPoint3 CollisionBox::get_point | ( | int | n | ) | const [inline] |
Returns the nth vertex of the OBB.
Definition at line 159 of file collisionBox.I.
References LPoint3f::zero().
Referenced by calc_to_3d_mat(), clip_polygon(), fill_viz_geom(), set_plane(), and setup_box().
LPoint3 CollisionBox::get_point_aabb | ( | int | n | ) | const [inline] |
Returns the nth vertex of the Axis Aligned Bounding Box.
Definition at line 171 of file collisionBox.I.
References LPoint3f::zero().
Referenced by CollisionBox().
PStatCollector & CollisionBox::get_test_pcollector | ( | ) | [virtual] |
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 224 of file collisionBox.cxx.
PStatCollector & CollisionBox::get_volume_pcollector | ( | ) | [virtual] |
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 212 of file collisionBox.cxx.
TypedWritable * CollisionBox::make_CollisionBox | ( | const FactoryParams & | params | ) | [static, protected] |
Factory method to generate a CollisionBox object.
Definition at line 1063 of file collisionBox.cxx.
References CollisionBox(), and fillin().
Referenced by register_with_read_factory().
bool CollisionBox::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.
Definition at line 979 of file collisionBox.cxx.
void CollisionBox::rederive_to_3d_mat | ( | LMatrix4 & | to_3d_mat, |
int | plane | ||
) | const [inline] |
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().
void CollisionBox::register_with_read_factory | ( | ) | [static] |
Factory method to generate a CollisionBox object.
Definition at line 1019 of file collisionBox.cxx.
References BamReader::get_factory(), make_CollisionBox(), and Factory< Type >::register_factory().
LPlane CollisionBox::set_plane | ( | int | n | ) | const [inline] |
Creates the nth face of the rectangular solid.
Definition at line 207 of file collisionBox.I.
References get_point().
Referenced by CollisionBox(), and xform().
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 xform().
void CollisionBox::setup_points | ( | const LPoint3 * | begin, |
const LPoint3 * | end, | ||
int | plane | ||
) |
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(), and LMatrix4f::invert_from().
Referenced by setup_box().
LPoint2 CollisionBox::to_2d | ( | const LVecBase3 & | point3d, |
int | plane | ||
) | const [inline] |
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.
Referenced by clip_polygon().
LPoint3 CollisionBox::to_3d | ( | const LVecBase2 & | point2d, |
const LMatrix4 & | to_3d_mat | ||
) | [inline, static] |
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.
void CollisionBox::write_datagram | ( | BamWriter * | manager, |
Datagram & | me | ||
) | [virtual] |
Function to write the important information in the particular object to a Datagram.
Reimplemented from CollisionSolid.
Definition at line 1030 of file collisionBox.cxx.
References Datagram::add_stdfloat(), Datagram::add_uint16(), LVecBase3f::write_datagram(), and LMatrix4f::write_datagram().
void CollisionBox::xform | ( | const LMatrix4 & | mat | ) | [virtual] |
Transforms the solid by the indicated matrix.
Reimplemented from CollisionSolid.
Definition at line 146 of file collisionBox.cxx.
References CollisionSolid::mark_internal_bounds_stale(), CollisionSolid::mark_viz_stale(), set_plane(), and setup_box().