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00020 #ifndef __CS_PLANE3_H__
00021 #define __CS_PLANE3_H__
00022
00023 #ifndef __CS_CSSYSDEFS_H__
00024 #error "cssysdef.h must be included in EVERY source file!"
00025 #endif
00026
00027 #include "csgeom/vector3.h"
00028
00034 class csPlane3
00035 {
00036 public:
00038 csVector3 norm;
00039
00041 float DD;
00042
00044 csPlane3 () : norm(0,0,1), DD(0) {}
00045
00047 csPlane3 (const csVector3& plane_norm, float d=0) : norm(plane_norm), DD(d) {}
00048
00050 csPlane3 (float a, float b, float c, float d=0) : norm(a,b,c), DD(d) {}
00051
00053 csPlane3 (const csVector3& v1, const csVector3& v2, const csVector3& v3);
00055 csPlane3 (const csVector3& v2, const csVector3& v3)
00056 {
00057 norm = v2 % v3; DD = 0;
00058 }
00059
00061 inline csVector3& Normal () { return norm; }
00063 inline const csVector3& Normal () const { return norm; }
00064
00066 inline float A () const { return norm.x; }
00068 inline float B () const { return norm.y; }
00070 inline float C () const { return norm.z; }
00072 inline float D () const { return DD; }
00073
00075 inline float& A () { return norm.x; }
00077 inline float& B () { return norm.y; }
00079 inline float& C () { return norm.z; }
00081 inline float& D () { return DD; }
00082
00084 inline void Set (float a, float b, float c, float d)
00085 { norm.x = a; norm.y = b; norm.z = c; DD = d; }
00086
00088 inline void Set (const csVector3& normal, float d)
00089 { norm = normal; DD = d; }
00090
00092 void Set (const csVector3& v1, const csVector3& v2, const csVector3& v3);
00094 void Set (const csVector3& v2, const csVector3& v3)
00095 {
00096 norm = v2 % v3; DD = 0;
00097 }
00098
00100 inline float Classify (const csVector3& pt) const { return norm*pt+DD; }
00101
00103 static float Classify (float A, float B, float C, float D,
00104 const csVector3& pt)
00105 { return A*pt.x + B*pt.y + C*pt.z + D; }
00106
00112 inline float Distance (const csVector3& pt) const
00113 { return ABS (Classify (pt)); }
00114
00116 void Invert() { norm = -norm; DD = -DD; }
00117
00119 void Normalize()
00120 {
00121 float f = norm.Norm();
00122 if (f) { norm /= f; DD /= f; }
00123 }
00124 };
00125
00126 #endif // __CS_PLANE3_H__