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Object-Oriented Graphics Rendering Engine
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OgrePlaneBoundedVolume.h
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28 #ifndef __PlaneBoundedVolume_H_
29 #define __PlaneBoundedVolume_H_
30 
31 // Precompiler options
32 #include "OgrePrerequisites.h"
33 #include "OgreAxisAlignedBox.h"
34 #include "OgreSphere.h"
35 #include "OgreMath.h"
36 #include "OgrePlane.h"
37 #include "OgreHeaderPrefix.h"
38 
39 namespace Ogre {
40 
50  {
51  public:
56 
57  PlaneBoundedVolume() :outside(Plane::NEGATIVE_SIDE) {}
60  : outside(theOutside) {}
61 
65  inline bool intersects(const AxisAlignedBox& box) const
66  {
67  if (box.isNull()) return false;
68  if (box.isInfinite()) return true;
69 
70  // Get centre of the box
71  Vector3 centre = box.getCenter();
72  // Get the half-size of the box
73  Vector3 halfSize = box.getHalfSize();
74 
75  PlaneList::const_iterator i, iend;
76  iend = planes.end();
77  for (i = planes.begin(); i != iend; ++i)
78  {
79  const Plane& plane = *i;
80 
81  Plane::Side side = plane.getSide(centre, halfSize);
82  if (side == outside)
83  {
84  // Found a splitting plane therefore return not intersecting
85  return false;
86  }
87  }
88 
89  // couldn't find a splitting plane, assume intersecting
90  return true;
91 
92  }
96  inline bool intersects(const Sphere& sphere) const
97  {
98  PlaneList::const_iterator i, iend;
99  iend = planes.end();
100  for (i = planes.begin(); i != iend; ++i)
101  {
102  const Plane& plane = *i;
103 
104  // Test which side of the plane the sphere is
105  Real d = plane.getDistance(sphere.getCenter());
106  // Negate d if planes point inwards
107  if (outside == Plane::NEGATIVE_SIDE) d = -d;
108 
109  if ( (d - sphere.getRadius()) > 0)
110  return false;
111  }
112 
113  return true;
114 
115  }
116 
121  inline std::pair<bool, Real> intersects(const Ray& ray)
122  {
123  return Math::intersects(ray, planes, outside == Plane::POSITIVE_SIDE);
124  }
125 
126  };
127 
129 
133 }
134 
135 #include "OgreHeaderSuffix.h"
136 
137 #endif
138 
Representation of a ray in space, i.e.
Definition: OgreRay.h:45
const Vector3 & getCenter(void) const
Returns the center point of the sphere.
Definition: OgreSphere.h:73
bool intersects(const Sphere &sphere) const
Intersection test with Sphere.
float Real
Software floating point type.
#define _OgreExport
Definition: OgrePlatform.h:255
PlaneList planes
Publicly accessible plane list, you can modify this direct.
Defines a plane in 3D space.
Definition: OgrePlane.h:61
PlaneBoundedVolume(Plane::Side theOutside)
Constructor, determines which side is deemed to be 'outside'.
Vector3 getCenter(void) const
Gets the centre of the box.
A 3D box aligned with the x/y/z axes.
static std::pair< bool, Real > intersects(const Ray &ray, const Plane &plane)
Ray / plane intersection, returns boolean result and distance.
std::pair< bool, Real > intersects(const Ray &ray)
Intersection test with a Ray.
vector< PlaneBoundedVolume >::type PlaneBoundedVolumeList
bool intersects(const AxisAlignedBox &box) const
Intersection test with AABB.
Side
The "positive side" of the plane is the half space to which the plane normal points.
Definition: OgrePlane.h:80
A sphere primitive, mostly used for bounds checking.
Definition: OgreSphere.h:51
Real getRadius(void) const
Returns the radius of the sphere.
Definition: OgreSphere.h:67
bool isNull(void) const
Returns true if the box is null i.e.
Standard 3-dimensional vector.
Definition: OgreVector3.h:50
Represents a convex volume bounded by planes.
vector< Plane >::type PlaneList
bool isInfinite(void) const
Returns true if the box is infinite.
Side getSide(const Vector3 &rkPoint) const
Real getDistance(const Vector3 &rkPoint) const
This is a pseudodistance.
Vector3 getHalfSize(void) const
Gets the half-size of the box.