C++ ON_Plane::IsValid方法代码示例

bool ON_PlaneSurface::CreatePseudoInfinitePlane( 
        const ON_Plane& plane,
        int point_count,
        const ON_3dPoint* point_list,
        double padding
        )
{
  if ( !plane.IsValid() )
    return false;
  if ( point_count < 1 )
    return false;
  if ( 0 == point_list )
    return false;
  if ( !ON_IsValid(padding) || padding < 0.0 )
    return false;

  ON_Interval plane_domain[2];
  double s, t;
  s = ON_UNSET_VALUE;
  t = ON_UNSET_VALUE;
  if ( !plane.ClosestPointTo( point_list[0], &s, &t ) || !ON_IsValid(s) || !ON_IsValid(t) )
    return 0;
  plane_domain[0].m_t[1] = plane_domain[0].m_t[0] = s;
  plane_domain[1].m_t[1] = plane_domain[1].m_t[0] = t;
  
  for ( int i = 1; i < point_count; i++ )
  {
    s = ON_UNSET_VALUE;
    t = ON_UNSET_VALUE;
    if ( !plane.ClosestPointTo( point_list[i], &s, &t ) || !ON_IsValid(s) || !ON_IsValid(t) )
      return 0;
    if ( s < plane_domain[0].m_t[0] ) plane_domain[0].m_t[0] = s; else if ( s > plane_domain[0].m_t[1] ) plane_domain[0].m_t[1] = s;
    if ( t < plane_domain[1].m_t[0] ) plane_domain[1].m_t[0] = t; else if ( t > plane_domain[1].m_t[1] ) plane_domain[1].m_t[1] = t;
  }

  s = padding*plane_domain[0].Length() + padding;
  if ( !(s > 0.0) && !plane_domain[0].IsIncreasing() )
    s = 1.0;
  plane_domain[0].m_t[0] -= s;
  plane_domain[0].m_t[1] += s;

  t = padding*plane_domain[1].Length() + padding;
  if ( !(t > 0.0) && !plane_domain[1].IsIncreasing() )
    t = 1.0;
  plane_domain[1].m_t[0] -= t;
  plane_domain[1].m_t[1] += t;

  m_plane = plane;
  m_domain[0] = plane_domain[0];
  m_domain[1] = plane_domain[1];
  m_extents[0] = plane_domain[0];
  m_extents[1] = plane_domain[1];

  return IsValid()?true:false;
}

ON_BOOL32 ON_Surface::FrameAt( double u, double v, ON_Plane& frame) const
{
  ON_BOOL32 rc = false;
  ON_3dPoint origin;
  ON_3dVector udir, vdir, normal;
  if( EvNormal( u, v, origin, udir, vdir, normal))
  {
    if ( udir.Unitize() )
      vdir = ON_CrossProduct( normal, udir);
    else if ( vdir.Unitize() )
      udir = ON_CrossProduct( vdir, normal);
    frame.CreateFromFrame( origin, udir, vdir);
    rc = frame.IsValid();
  }
  return rc;
}

CRhinoCommand::result CCommandSampleOrientOnCrv::GetBasePlane( ON_Plane& base_plane )
{
  CRhinoGetPoint get;
  get.SetCommandPrompt( L"Base point" );
  get.AcceptNothing();
  get.GetPoint();

  CRhinoCommand::result rc = get.CommandResult();
  if( rc == CRhinoCommand::success )
  {
    base_plane = get.View()->Viewport().ConstructionPlane().m_plane;
    base_plane.origin = get.Point();
    base_plane.UpdateEquation();
    if( !base_plane.IsValid() )
      rc = CRhinoCommand::cancel;
  }

  return rc;
}

bool ON_Quaternion::GetRotation(ON_Plane& plane) const
{
  plane.xaxis.x = a*a + b*b - c*c - d*d;
  plane.xaxis.y = 2.0*(a*d + b*c);
  plane.xaxis.z = 2.0*(b*d - a*c);

  plane.yaxis.x = 2.0*(b*c - a*d);
  plane.yaxis.y = a*a - b*b + c*c - d*d;
  plane.yaxis.z = 2.0*(a*b + c*d);

  plane.zaxis.x = 2.0*(a*c + b*d);
  plane.zaxis.y = 2.0*(c*d - a*b);
  plane.zaxis.z = a*a - b*b - c*c + d*d;

  plane.xaxis.Unitize();
  plane.yaxis.Unitize();
  plane.zaxis.Unitize();
  plane.origin.Set(0.0,0.0,0.0);
  plane.UpdateEquation();

  return plane.IsValid();
}

int ON_ArePointsOnPlane( // returns 0=no, 1 = yes, 2 = pointset is (to tolerance) a single point on the line
        int dim,     // 2 or 3
        int is_rat,
        int count, 
        int stride, const double* point,
        const ON_BoundingBox& bbox, // if needed, use ON_GetBoundingBox(dim,is_rat,count,stride,point)
        const ON_Plane& plane,  // line to test
        double tolerance
        )
{
  double w;
  int i, j, k;

  if ( count < 1 )
    return 0;
  if ( !plane.IsValid() )
  {
    ON_ERROR("plane parameter is not valid");
    return 0;
  }
  if ( !bbox.IsValid() )
  {
    ON_ERROR("bbox parameter is not valid");
    return 0;
  }
  if ( !ON_IsValid(tolerance) || tolerance < 0.0 )
  {
    ON_ERROR("tolerance must be >= 0.0");
    return 0;
  }
  if ( dim < 2 || dim > 3 )
  {
    ON_ERROR("dim must be 2 or 3");
    return 0;
  }
  if ( stride < (is_rat?(dim+1):dim) )
  {
    ON_ERROR("stride parameter is too small");
    return 0;
  }
  if ( 0 == point )
  {
    ON_ERROR("point parameter is null");
    return 0;
  }

  int rc = 0;

  if ( tolerance == 0.0 ) {
    tolerance = bbox.Tolerance();
  }

  ON_3dPoint Q;

  // test bounding box to quickly detect the common coordinate axis cases
  rc = (count == 1 || bbox.Diagonal().Length() <= tolerance) ? 2 : 1;
  for ( i = 0; rc && i < 2; i++ ) {
    Q.x = bbox[i].x;
    for ( j = 0; rc && j < 2; j++) {
      Q.y = bbox[j].y;
      for ( k = 0; rc && k < 2; k++) {
        Q.z = bbox[k].z;
        if ( Q.DistanceTo( plane.ClosestPointTo( Q ) ) > tolerance )
          rc = 0;
      }
    }
  }

  if ( !rc ) {
    // test points one by one
    Q.Zero();
    rc = (count == 1 || bbox.Diagonal().Length() <= tolerance) ? 2 : 1;
    if ( is_rat ) {
      for ( i = 0; i < count; i++ ) {
        w = point[dim];
        if ( w == 0.0 ) {
          ON_ERROR("rational point has zero weight");
          return 0;
        }
        ON_ArrayScale( dim, 1.0/w, point, &Q.x );
        if ( Q.DistanceTo( plane.ClosestPointTo( Q ) ) > tolerance ) {
          rc = 0;
          break;
        }
        point += stride;
      }
    }
    else {
      for ( i = 0; i < count; i++ ) {
        memcpy( &Q.x, point, dim*sizeof(Q.x) );
        if ( Q.DistanceTo( plane.ClosestPointTo( Q ) ) > tolerance ) {
          rc = 0;
          break;
        }
        point += stride;
      }
    }
  }

  return rc;
//.........这里部分代码省略.........

bool ON_Plane::Morph( const ON_SpaceMorph& morph )
{
  ON_Plane mp;
  double s = sqrt( fabs(origin.MaximumCoordinate())*ON_SQRT_EPSILON + ON_ZERO_TOLERANCE );
  mp.xaxis = morph.MorphVector(origin,s*xaxis);
  mp.yaxis = morph.MorphVector(origin,s*yaxis);
  mp.zaxis = morph.MorphVector(origin,s*zaxis);
  origin = morph.MorphPoint(origin);
  UpdateEquation();
  bool bx = mp.xaxis.Unitize();
  bool by = mp.yaxis.Unitize();
  bool bz = mp.zaxis.Unitize();
  if (!bx)
  {
    mp.xaxis = ON_CrossProduct(mp.yaxis,mp.zaxis);
    bx = mp.xaxis.Unitize();
  }
  if (!by)
  {
    mp.yaxis = ON_CrossProduct(mp.zaxis,mp.xaxis);
    by = mp.yaxis.Unitize();
  }
  if (!bz)
  {
    mp.zaxis = ON_CrossProduct(mp.xaxis,mp.yaxis);
    bz = mp.zaxis.Unitize();
  }

  mp.origin.Set(0.0,0.0,0.0);
  mp.UpdateEquation();
  bool rc = mp.IsValid();
  ON_3dVector x, y, z;
  if ( rc )
  {
    x = mp.xaxis;
    y = mp.yaxis;
    z = mp.zaxis;
  }
  else
  {
    x = ON_CrossProduct(mp.yaxis,mp.zaxis);
    y = ON_CrossProduct(mp.zaxis,mp.xaxis);
    z = ON_CrossProduct(mp.xaxis,mp.yaxis);
    x.Unitize();
    y.Unitize();
    z.Unitize();
    x = mp.xaxis + x;
    y = mp.yaxis + y;
    z = mp.zaxis + z;
    x.Unitize();
    y.Unitize();
    z.Unitize();
    rc = mp.CreateFromFrame(ON_origin,x,y);
    if (rc)
    {
      x = mp.xaxis;
      y = mp.yaxis;
      z = mp.zaxis;
    }
    else
    {
      rc = mp.CreateFromFrame(ON_origin,y,z);
      if ( rc )
      {
        y = mp.xaxis;
        z = mp.yaxis;
        x = mp.zaxis;
      }
      else
      {
        rc = mp.CreateFromFrame(ON_origin,z,x);
        if (rc)
        {
          z = mp.xaxis;
          x = mp.yaxis;
          y = mp.zaxis;
        }
        else
        {
          rc = mp.CreateFromNormal(ON_origin,z);
          if (rc)
          {
            x = mp.xaxis;
            y = mp.yaxis;
            z = mp.zaxis;
          }
        }
      }
    }
  }

  if (rc)
  {
    xaxis = x;
    yaxis = y;
    zaxis = z;
    UpdateEquation();
  }

  return rc;
//.........这里部分代码省略.........