src/beziertriangle.h

   1 //
   2 // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
   3 // +                                                                      +
   4 // + This file is part of enGrid.                                         +
   5 // +                                                                      +
   6 // + Copyright 2008,2009 Oliver Gloth                                     +
   7 // +                                                                      +
   8 // + enGrid is free software: you can redistribute it and/or modify       +
   9 // + it under the terms of the GNU General Public License as published by +
  10 // + the Free Software Foundation, either version 3 of the License, or    +
  11 // + (at your option) any later version.                                  +
  12 // +                                                                      +
  13 // + enGrid is distributed in the hope that it will be useful,            +
  14 // + but WITHOUT ANY WARRANTY; without even the implied warranty of       +
  15 // + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        +
  16 // + GNU General Public License for more details.                         +
  17 // +                                                                      +
  18 // + You should have received a copy of the GNU General Public License    +
  19 // + along with enGrid. If not, see <http://www.gnu.org/licenses/>.       +
  20 // +                                                                      +
  21 // ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
  22 //
  23 #ifndef BEZIERTRIANGLE_H
  24 #define BEZIERTRIANGLE_H
  25
  26 #include "math/mathvector.h"
  27 #include "math/linsolve.h"
  28 #include "math/smallsquarematrix.h"
  29
  30 #include "egvtkobject.h"
  31
  32 #include <vtkUnstructuredGrid.h>
  33
  34 class BezierTriangle : public EgVtkObject
  35 {
  36 public:
  37   vec3_t m_X_200;
  38   vec3_t m_X_020;
  39   vec3_t m_X_002;
  40   vec3_t m_X_011;
  41   vec3_t m_X_101;
  42   vec3_t m_X_110;
  43
  44 public:
  45   BezierTriangle();
  46   BezierTriangle(vec3_t X_200, vec3_t X_020, vec3_t X_002, vec3_t X_011, vec3_t X_101, vec3_t X_110);
  47
  48   void setControlPoints(vec3_t X_200, vec3_t X_020, vec3_t X_002, vec3_t X_011, vec3_t X_101, vec3_t X_110);
  49   void getControlPoints(vec3_t& X_200, vec3_t& X_020, vec3_t& X_002, vec3_t& X_011, vec3_t& X_101, vec3_t& X_110);
  50   vec2_t BaryCentric2xy(vec3_t barycoords);
  51   vec3_t xy2BaryCentric(vec2_t xycoords);
  52   vec3_t Bezier(vec2_t xycoords);
  53   vec3_t Bezier(vec3_t barycoords);
  54   vec3_t Projection(vec2_t xycoords);
  55   vec3_t Projection(vec3_t barycoords);
  56   mat2_t JacobiMatrix();
  57   vec2_t FixedPointFunction(vec2_t xycoords);
  58   void writeBezierSurface();
  59 //   vtkIdType addBezierSurface(vtkUnstructuredGrid* bezier, int offset, int N);
  60   vec3_t QuadraticBezierTriangle(double u, double v, double w);
  61   vec3_t QuadraticBezierTriangle(vec2_t M);
  62   vec3_t projectOnQuadraticBezierTriangle(vec3_t M);
  63 };
  64
  65 #endif