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# Common/vtkPlane.h

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    00001 /*=========================================================================
    00002
    00003   Program:   Visualization Toolkit
    00004   Module:    $RCSfile: vtkPlane.h,v $
    00005   Language:  C++
    00006
    00007   Copyright (c) 1993-2002 Ken Martin, Will Schroeder, Bill Lorensen
    00008   All rights reserved.
    00009   See Copyright.txt or http://www.kitware.com/Copyright.htm for details.
    00010
    00011      This software is distributed WITHOUT ANY WARRANTY; without even
    00012      the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
    00013      PURPOSE.  See the above copyright notice for more information.
    00014
    00015 =========================================================================*/
    00047 #ifndef __vtkPlane_h
    00048 #define __vtkPlane_h
    00049
    00050 #include "vtkImplicitFunction.h"
    00051
    00052 class VTK_COMMON_EXPORT vtkPlane : public vtkImplicitFunction
    00053 {
    00054 public:
    00056   static vtkPlane *New();
    00057
    00058   vtkTypeRevisionMacro(vtkPlane,vtkImplicitFunction);
    00059   void PrintSelf(ostream& os, vtkIndent indent);
    00060
    00062
    00063   float EvaluateFunction(float x[3]);
    00064   float EvaluateFunction(float x, float y, float z)
    00065     {return this->vtkImplicitFunction::EvaluateFunction(x, y, z); } ;
    00067
    00069   void EvaluateGradient(float x[3], float g[3]);
    00070
    00072
    00073   vtkSetVector3Macro(Normal,float);
    00074   vtkGetVectorMacro(Normal,float,3);
    00076
    00078
    00080   vtkSetVector3Macro(Origin,float);
    00081   vtkGetVectorMacro(Origin,float,3);
    00083
    00086   void Push(float distance);
    00087
    00089
    00092   static void ProjectPoint(float x[3], float origin[3], float normal[3],
    00093                            float xproj[3]);
    00094   static void ProjectPoint(double x[3], double origin[3], double normal[3],
    00095                            double xproj[3]);
    00097
    00099
    00102   static void GeneralizedProjectPoint(float x[3], float origin[3],
    00103                                       float normal[3], float xproj[3]);
    00105
    00107
    00108   static float Evaluate(float normal[3], float origin[3], float x[3]);
    00109   static float Evaluate(double normal[3], double origin[3], double x[3]);
    00111
    00114   static float DistanceToPlane(float x[3], float n[3], float p0[3]);
    00115
    00117
    00122   static int IntersectWithLine(float p1[3], float p2[3], float n[3],
    00123                                float p0[3], float& t, float x[3]);
    00125
    00126
    00127 protected:
    00128   vtkPlane();
    00129   ~vtkPlane() {};
    00130
    00131   float Normal[3];
    00132   float Origin[3];
    00133
    00134 private:
    00135   vtkPlane(const vtkPlane&);  // Not implemented.
    00136   void operator=(const vtkPlane&);  // Not implemented.
    00137 };
    00138
    00139 inline float vtkPlane::Evaluate(float normal[3], float origin[3], float x[3])
    00140 {
    00141   return normal[0]*(x[0]-origin[0]) + normal[1]*(x[1]-origin[1]) +
    00142          normal[2]*(x[2]-origin[2]);
    00143 }
    00144 inline float vtkPlane::Evaluate(double normal[3], double origin[3],double x[3])
    00145 {
    00146   return static_cast<float> (normal[0]*(x[0]-origin[0]) + normal[1]*(x[1]-origin[1]) +
    00147          normal[2]*(x[2]-origin[2]));
    00148 }
    00149
    00150 inline float vtkPlane::DistanceToPlane(float x[3], float n[3], float p0[3])
    00151 {
    00152 #define vtkPlaneAbs(x) ((x)<0?-(x):(x))
    00153   return ((float) vtkPlaneAbs(n[0]*(x[0]-p0[0]) + n[1]*(x[1]-p0[1]) +
    00154                               n[2]*(x[2]-p0[2])));
    00155 }
    00156
    00157 #endif
    00158
    00159