vector3d.c

#include "vector3d.h"

/*!
  \file
  \brief Vector functions
*/


  bool vector3d_eq ( const Vector3D * v1, const Vector3D * v2 )
  {
    return (
      FPeq(v1->x, v2->x) &&
      FPeq(v1->y, v2->y) &&
      FPeq(v1->z, v2->z)
    );
  }


  Vector3D * vector3d_cross ( Vector3D * out , const Vector3D * v1 , const Vector3D * v2 )
  {
    out->x    =  v1->y * v2->z - v1->z * v2->y;
    out->y    =  v1->z * v2->x - v1->x * v2->z;
    out->z    =  v1->x * v2->y - v1->y * v2->x;
    return out;
  }


  float8  vector3d_scalar ( Vector3D * v1 , Vector3D * v2 ){
	float8 out = 0;
    out     += v1->x * v2->x;
    out     += v1->y * v2->y;
    out     += v1->z * v2->z;
    return ( out );
  }

  float8 vector3d_length ( const Vector3D * v ){
    return sqrt( sqr(v->x) + sqr(v->y) + sqr(v->z) );
  }