TransformMatrix.h

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#ifndef TRANSFORMMATRIX_H
#define TRANSFORMMATRIX_H

#include "Triangle.h"

#ifndef NDEBUG
# ifndef BUILDING_DOX
#   include <iostream>
# endif
#endif

struct SpatialVector {
    float dx; 
    float dy; 
    float dz; 
    
    operator float() const;
};

inline SpatialVector& operator*= (SpatialVector &vect, float f) {
  vect.dx*= f;
  vect.dy*= f;
  vect.dz*= f;
  return vect;
}

#ifndef NDEBUG

inline std::ostream& operator<< (std::ostream &out, const SpatialVector &vect) {
  out << "vect(" <<
      vect.dx << ", " <<
      vect.dy << ", " <<
      vect.dz << ")";
  return out;
}
#endif

class TransformMatrix {
public:
    enum { MATRIX_DIM = 4 };
    
    typedef float TTransformMatrix[MATRIX_DIM][MATRIX_DIM];
    
    static void setIdentity(
        TTransformMatrix dest);
    
    static void copyMatrix(
        TTransformMatrix dest,
        TTransformMatrix src);
    
    static void mulMatrix(
        TTransformMatrix dest,
        TTransformMatrix a,
        TTransformMatrix b);
    
    TransformMatrix();

    void rotate (float angle, SpatialVector vect );

    void translate (SpatialVector vect );

    void scale (SpatialVector vect );

    void shear (SpatialVector);

    Vertex transform (Vertex vertex);
    
  private:
    TTransformMatrix matrix_;
  
  protected:
#ifndef BUILDING_DOX
    void mulMatrixFromLeft(TTransformMatrix mm);
    void mulMatrixFromRight(TTransformMatrix mm);
#endif
};

#endif // TRANSFORMMATRIX_H

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