1 | #ifndef _Polygon3_h__ |
---|
2 | #define _Polygon3_h__ |
---|
3 | |
---|
4 | |
---|
5 | //#include <iostream> |
---|
6 | //#include <math.h> |
---|
7 | //#include "common.h" |
---|
8 | #include "Containers.h" |
---|
9 | #include "Mesh.h" |
---|
10 | #include <iomanip> |
---|
11 | |
---|
12 | class Polygon3; |
---|
13 | class Plane3; |
---|
14 | class Face; |
---|
15 | |
---|
16 | |
---|
17 | /** Class representing a general planar polygon in 3d. |
---|
18 | */ |
---|
19 | class Polygon3 |
---|
20 | { |
---|
21 | public: |
---|
22 | Polygon3(); |
---|
23 | Polygon3(const VertexContainer &vertices); |
---|
24 | |
---|
25 | /** Copies all the vertices of the face. |
---|
26 | */ |
---|
27 | Polygon3(Face *face, Mesh *parent); |
---|
28 | |
---|
29 | /** Returns supporting plane of this polygon. |
---|
30 | */ |
---|
31 | Plane3 GetSupportingPlane() const; |
---|
32 | |
---|
33 | /** Splits polygon. |
---|
34 | @param partition the split plane |
---|
35 | @param front the front polygon |
---|
36 | @param back the back polygon |
---|
37 | @param splits number of splits |
---|
38 | */ |
---|
39 | void Split(Plane3 *partition, Polygon3 *front, Polygon3 *back, int &splits); |
---|
40 | |
---|
41 | enum {BACK_SIDE, FRONT_SIDE, SPLIT, COINCIDENT}; |
---|
42 | |
---|
43 | /** Classify polygon with respect to the plane. |
---|
44 | @returns one of BACK_SIDE, FRONT_SIDE, SPLIT, COINCIDENT |
---|
45 | */ |
---|
46 | int ClassifyPlane(const Plane3 &plane) const; |
---|
47 | |
---|
48 | /** Side of the polygon with respect to the plane. |
---|
49 | @returns 1 if on front side, -1 if on back side, 0 else. |
---|
50 | */ |
---|
51 | int Side(const Plane3 &plane) const; |
---|
52 | |
---|
53 | /** Scales the polygon about its center |
---|
54 | */ |
---|
55 | void Scale(const float scale); |
---|
56 | |
---|
57 | /** Computes the center of mass of the polygon |
---|
58 | */ |
---|
59 | Vector3 Center() const; |
---|
60 | |
---|
61 | |
---|
62 | /// vertices are connected in counterclockwise order. |
---|
63 | VertexContainer mVertices; |
---|
64 | |
---|
65 | /// we can also store materials with polygons |
---|
66 | Material *mMaterial; |
---|
67 | |
---|
68 | static int mLeastSplitTable[4]; |
---|
69 | static int mBalancedTreeTable[4]; |
---|
70 | }; |
---|
71 | |
---|
72 | // Overload << operator for C++-style output |
---|
73 | inline ostream& |
---|
74 | operator<< (ostream &s, const Polygon3 &A) |
---|
75 | { |
---|
76 | VertexContainer::const_iterator it; |
---|
77 | |
---|
78 | s << setprecision(6) << "Polygon:\n"; |
---|
79 | |
---|
80 | for (it = A.mVertices.begin(); it != A.mVertices.end(); ++it) |
---|
81 | s << *it << endl; |
---|
82 | |
---|
83 | return s; |
---|
84 | } |
---|
85 | |
---|
86 | |
---|
87 | #endif |
---|