AdvancedStrokeShaders.h

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/*
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 */
 
#pragma once
 
#include "BasicStrokeShaders.h"
 
namespace Freestyle {
 
class CalligraphicShader : public StrokeShader {
 public:
  CalligraphicShader(real iMinThickness,
                     real iMaxThickness,
                     const Vec2f &iOrientation,
                     bool clamp);
 
  virtual ~CalligraphicShader()
  {
  }
 
  virtual int shade(Stroke &ioStroke) const;
 
 protected:
  real _maxThickness;
  real _minThickness;
  Vec2f _orientation;
  bool _clamp;
};
 
class SpatialNoiseShader : public StrokeShader {
 public:
  SpatialNoiseShader(float iAmount, float ixScale, int nbOctave, bool smooth, bool pureRandom);
 
  virtual ~SpatialNoiseShader()
  {
  }
 
  virtual int shade(Stroke &ioStroke) const;
 
 protected:
  float _amount;
  float _xScale;
  int _nbOctave;
  bool _smooth;
  bool _pureRandom;
};
 
class SmoothingShader : public StrokeShader {
 public:
  SmoothingShader(int iNbIteration,
                  real iFactorPoint,
                  real ifactorCurvature,
                  real iFactorCurvatureDifference,
                  real iAnisoPoint,
                  real iAnisoNormal,
                  real iAnisoCurvature,
                  real icarricatureFactor);
 
  virtual ~SmoothingShader()
  {
  }
 
  virtual int shade(Stroke &ioStroke) const;
 
 protected:
  int _nbIterations;
  real _factorPoint;
  real _factorCurvature;
  real _factorCurvatureDifference;
  real _anisoPoint;
  real _anisoNormal;
  real _anisoCurvature;
  real _carricatureFactor;
};
 
class Smoother {
 public:
  Smoother(Stroke &ioStroke);
 
  virtual ~Smoother();
 
  void smooth(int nbIterations,
              real iFactorPoint,
              real ifactorCurvature,
              real iFactorCurvatureDifference,
              real iAnisoPoint,
              real iAnisoNormal,
              real iAnisoCurvature,
              real icarricatureFactor);
 
  void computeCurvature();
 
 protected:
  real _factorPoint;
  real _factorCurvature;
  real _factorCurvatureDifference;
  real _anisoPoint;
  real _anisoNormal;
  real _anisoCurvature;
  real _carricatureFactor;
 
  void iteration();
  void copyVertices();
 
  Stroke *_stroke;
  int _nbVertices;
  Vec2r *_vertex;
  Vec2r *_normal;
  real *_curvature;
  bool *_isFixedVertex;
 
  bool _isClosedCurve;
  bool _safeTest;
};
 
class Omitter : public Smoother {
 public:
  Omitter(Stroke &ioStroke);
 
  virtual ~Omitter()
  {
  }
 
  void omit(real sizeWindow, real thrVari, real thrFlat, real lFlat);
 
 protected:
  real *_u;
 
  real _sizeWindow;
  real _thresholdVariation;
  real _thresholdFlat;
  real _lengthFlat;
};
 
class OmissionShader : public StrokeShader {
 public:
  OmissionShader(real sizeWindow, real thrVari, real thrFlat, real lFlat);
  virtual ~OmissionShader()
  {
  }
 
  virtual int shade(Stroke &ioStroke) const;
 
 protected:
  real _sizeWindow;
  real _thresholdVariation;
  real _thresholdFlat;
  real _lengthFlat;
};
 
} /* namespace Freestyle */