#ifndef COLLISIONBOX_H

#define COLLISIONBOX_H

#include "pandabase.h"

#include "collisionSolid.h"

#include "parabola.h"

#include "plane.h"

#include "look_at.h"

#include "clipPlaneAttrib.h"

class EXPCL_PANDA_COLLIDE CollisionBox : public CollisionSolid {

PUBLISHED:

INLINE explicit CollisionBox(const LPoint3 &center,

PN_stdfloat x, PN_stdfloat y, PN_stdfloat z);

INLINE explicit CollisionBox(const LPoint3 &min, const LPoint3 &max);

virtual LPoint3 get_collision_origin() const;

INLINE CollisionBox();

INLINE CollisionBox(const CollisionBox &copy);

virtual CollisionSolid *make_copy();

virtual PT(CollisionEntry)

test_intersection(const CollisionEntry &entry) const;

virtual void xform(const LMatrix4 &mat);

virtual PStatCollector &get_volume_pcollector();

virtual PStatCollector &get_test_pcollector();

virtual void output(std::ostream &out) const;

INLINE static void flush_level();

void setup_box();

PUBLISHED:

INLINE int get_num_points() const;

INLINE LPoint3 get_point_aabb(int n) const;

INLINE LPoint3 get_point(int n) const;

INLINE int get_num_planes() const;

INLINE LPlane set_plane(int n) const;

INLINE LPlane get_plane(int n) const;

INLINE void set_center(const LPoint3 &center);

INLINE void set_center(PN_stdfloat x, PN_stdfloat y, PN_stdfloat z);

INLINE const LPoint3 &get_center() const;

INLINE const LPoint3 &get_min() const;

INLINE const LPoint3 &get_max() const;

INLINE LVector3 get_dimensions() const;

PUBLISHED:

MAKE_PROPERTY(center, get_center);

MAKE_PROPERTY(min, get_min);

MAKE_PROPERTY(max, get_max);

MAKE_PROPERTY(dimensions, get_dimensions);

virtual PT(BoundingVolume) compute_internal_bounds() const;

virtual PT(CollisionEntry)

test_intersection_from_sphere(const CollisionEntry &entry) const;

virtual PT(CollisionEntry)

test_intersection_from_line(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_parabola(const CollisionEntry &entry) const;

virtual PT(CollisionEntry)

test_intersection_from_capsule(const CollisionEntry &entry) const;

virtual PT(CollisionEntry)

test_intersection_from_box(const CollisionEntry &entry) const;

virtual void fill_viz_geom();

bool intersects_line(double &t1, double &t2,

const LPoint3 &from, const LVector3 &delta,

PN_stdfloat inflate_size=0) const;

LPoint3 _center;

LPoint3 _min;

LPoint3 _max;

PN_stdfloat _x, _y, _z, _radius;

LPoint3 _vertex[8]; // Each of the Eight Vertices of the Box

LPlane _planes[6]; //Points to each of the six sides of the Box

static const int plane_def[6][4];

static PStatCollector _volume_pcollector;

static PStatCollector _test_pcollector;

INLINE static bool is_right(const LVector2 &v1, const LVector2 &v2);

INLINE static PN_stdfloat dist_to_line(const LPoint2 &p,

const LPoint2 &f, const LVector2 &v);

static PN_stdfloat dist_to_line_segment(const LPoint2 &p,

const LPoint2 &f, const LPoint2 &t,

const LVector2 &v);

class PointDef {

};

typedef pvector<PointDef> Points;

static void compute_vectors(Points &points);

void draw_polygon(GeomNode *viz_geom_node, GeomNode *bounds_viz_geom_node,

const Points &points) const;

bool point_is_inside(const LPoint2 &p, const Points &points) const;

PN_stdfloat dist_to_polygon(const LPoint2 &p, const Points &points) const;

void setup_points(const LPoint3 *begin, const LPoint3 *end, int plane);

INLINE LPoint2 to_2d(const LVecBase3 &point3d, int plane) const;

INLINE void calc_to_3d_mat(LMatrix4 &to_3d_mat, int plane) const;

INLINE void rederive_to_3d_mat(LMatrix4 &to_3d_mat, int plane) const;

INLINE static LPoint3 to_3d(const LVecBase2 &point2d, const LMatrix4 &to_3d_mat);

bool clip_polygon(Points &new_points, const Points &source_points,

const LPlane &plane,int plane_no) const;

bool apply_clip_plane(Points &new_points, const ClipPlaneAttrib *cpa,

const TransformState *net_transform, int plane_no) const;

Points _points[6]; // one set of points for each of the six planes that make up the box

LMatrix4 _to_2d_mat[6];

INLINE Points get_plane_points( int n );

static void register_with_read_factory();

virtual void write_datagram(BamWriter *manager, Datagram &me);

static TypedWritable *make_CollisionBox(const FactoryParams &params);

void fillin(DatagramIterator &scan, BamReader *manager);

static TypeHandle get_class_type() {

return _type_handle;

}

static void init_type() {

}

virtual TypeHandle get_type() const {

return get_class_type();

}

virtual TypeHandle force_init_type() {init_type(); return get_class_type();}

static TypeHandle _type_handle;

};

#include "collisionBox.I"

#endif /* COLLISIONBOX_H */