u3d_math.hpp

// u3d_math.hpp
// $Id: u3d_math.hpp,v 1.9 2007/08/22 10:13:58 guser1 Exp $
#ifndef __u3d_math_hpp
#define __u3d_math_hpp

#include <u3d_point.hpp>

typedef std::vector<double> U3dMathDArray;

typedef std::vector<U3dMathDArray> U3dMathDMatrix;

class U3dMath
{
public:
  static double compositionMul(const U3dPoint &p1, const U3dPoint &p2, const U3dPoint &p3);
  
  static double scalarMul(const U3dPoint &p1, const U3dPoint &p2);
  
  static void matrix4x4Mul(const double (&m1)[4][4], const double (&m2)[4][4], double (&m3)[4][4], 
               bool tr1 = false, bool tr2 = false);
  
  static void matrix2vec4x4Mul(const double (&m)[4][4], const double (&u)[4], double (&v)[4], 
                   bool tr = false);
  
  static void vec2matrix4x4Mul(const double (&u)[4], const double (&m)[4][4], double (&v)[4], 
                   bool tr = false);

  static void getLineCoeffs(double x1, double y1, double x2, double y2, 
                double &k, double &b);
  
  static int solveSquareEq(double a, double b, double c, double &x1, double &x2); 

  static double m_d_prec;
};

#endif //__u3d_math_hpp