[2912] | 1 | #ifndef _POLYHEDRON_H__
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| 2 | #define _POLYHEDRON_H__
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| 3 |
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| 4 |
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| 5 | #include "common.h"
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| 6 | #include "AxisAlignedBox3.h"
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| 7 | #include "Polygon3.h"
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| 8 |
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| 9 | #include <iostream>
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| 10 |
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| 11 |
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| 12 |
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| 13 | namespace CHCDemoEngine
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| 14 | {
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| 15 |
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| 16 | class Plane3;
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| 17 | class AxisAlignedBox3;
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| 18 | class Vector3;
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| 19 |
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| 20 |
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| 21 | /** Class representing a convex polyhedron.
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| 22 | */
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| 23 | class Polyhedron
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| 24 | {
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| 25 | public:
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| 26 |
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| 27 | Polyhedron();
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| 28 | /** Copy constructor making a deep copy of the polygons.
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| 29 | */
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| 30 | Polyhedron(const Polyhedron &rhs);
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| 31 | /** Initialises the Polyhedron with the given polygons.
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| 32 | @NOTE The polygons are NOT duplicated, only
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| 33 | a shallow copy is used.
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| 34 | */
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| 35 | Polyhedron(const PolygonContainer &polys);
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| 36 |
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| 37 | ~Polyhedron();
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| 38 | /** Computes the intersection of the polyhedron with the given plane
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[3020] | 39 | and returns it as another polyhedron
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[2912] | 40 | @returns NULL if the geometry is not split by this plane
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| 41 | */
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| 42 | Polyhedron *CalcIntersection(const Plane3 &splitPlane) const;
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| 43 | /** Adds a polygon to the polyhedron.
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| 44 | */
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[3020] | 45 | //void Add(const Polygon3 &poly);
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| 46 |
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[2912] | 47 | void Add(Polygon3 *poly);
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[3020] | 48 |
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[2912] | 49 | /** Computes bounding box of the geometry.
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| 50 | */
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| 51 | AxisAlignedBox3 GetBoundingBox() const;
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| 52 | /** Returns
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| 53 | 1 if geometry in front of the plane
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| 54 | 0 if plane intersects geometry,
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| 55 | -1 if geometry is behind the plane
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| 56 | */
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| 57 | int Side(const Plane3 &plane) const;
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| 58 | /** Returns true if this geometry is well shaped.
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| 59 | */
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| 60 | bool Valid() const;
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| 61 | /** Number of polygons.
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| 62 | */
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| 63 | int NumPolygons() const;
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| 64 | /** Returns the polygons in a container.
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| 65 | */
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| 66 | const PolygonContainer &GetPolygons() const;
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| 67 |
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| 68 | float GetArea() const;
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| 69 |
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| 70 | float GetVolume() const;
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| 71 |
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| 72 | Vector3 CenterOfMass() const;
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| 73 | /** Returns all the vertices of this polyhedron
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| 74 | */
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| 75 | void CollectVertices(VertexArray &vertices) const;
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[2929] | 76 | /** Computes polyhedron from a couple of intersecting planes and a bounding box.
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| 77 | */
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| 78 | static Polyhedron *CreatePolyhedron(const std::vector<Plane3> &planes, const AxisAlignedBox3 &box);
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| 79 |
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[3020] | 80 | inline friend std::ostream &operator<<(std::ostream &s, const Polyhedron &a);
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| 81 |
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| 82 |
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[2912] | 83 | protected:
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| 84 |
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| 85 | /** Splits the given polygon with the polyhedron
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| 86 | Returns the part of the polygon inside of the polyhedron.
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| 87 | */
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| 88 | Polygon3 *SplitPolygon(Polygon3 *polygon) const;
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| 89 |
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| 90 |
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| 91 |
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| 92 | ///////////////
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| 93 |
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| 94 | /// the polygons
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| 95 | PolygonContainer mPolygons;
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| 96 | /// the bounding box
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| 97 | AxisAlignedBox3 mBox;
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| 98 | };
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| 99 |
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| 100 |
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| 101 | std::ostream &operator<<(std::ostream &s, const Polyhedron &a)
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| 102 | {
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| 103 | PolygonContainer::const_iterator it, it_end = a.mPolygons.end();
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| 104 |
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| 105 | for (it = a.mPolygons.begin(); it != it_end; ++ it)
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| 106 | s << *(*it) << std::endl;
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| 107 | return s << std::endl;
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| 108 | }
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| 109 |
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| 110 |
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| 111 | }
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| 112 |
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| 113 | #endif |
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