OGRE  1.9.0
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
39namespace 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
#define _OgreExport
A 3D box aligned with the x/y/z axes.
bool isNull(void) const
Returns true if the box is null i.e.
Vector3 getHalfSize(void) const
Gets the half-size of the box.
Vector3 getCenter(void) const
Gets the centre of the box.
bool isInfinite(void) const
Returns true if the box is infinite.
Represents a convex volume bounded by planes.
PlaneBoundedVolume(Plane::Side theOutside)
Constructor, determines which side is deemed to be 'outside'.
PlaneList planes
Publicly accessible plane list, you can modify this direct.
bool intersects(const Sphere &sphere) const
Intersection test with Sphere.
std::pair< bool, Real > intersects(const Ray &ray)
Intersection test with a Ray.
bool intersects(const AxisAlignedBox &box) const
Intersection test with AABB.
vector< Plane >::type PlaneList
Defines a plane in 3D space.
Definition OgrePlane.h:62
Side getSide(const Vector3 &rkPoint) const
Real getDistance(const Vector3 &rkPoint) const
This is a pseudodistance.
Side
The "positive side" of the plane is the half space to which the plane normal points.
Definition OgrePlane.h:81
Representation of a ray in space, i.e.
Definition OgreRay.h:47
A sphere primitive, mostly used for bounds checking.
Definition OgreSphere.h:52
Real getRadius(void) const
Returns the radius of the sphere.
Definition OgreSphere.h:67
const Vector3 & getCenter(void) const
Returns the center point of the sphere.
Definition OgreSphere.h:73
Standard 3-dimensional vector.
Definition OgreVector3.h:52
vector< PlaneBoundedVolume >::type PlaneBoundedVolumeList
float Real
Software floating point type.
std::vector< T, A > type