OE2DPath¶

class OE2DPath

A sequence of lines and curves.

Example of path¶

See also

OEImageBase::DrawPath

Constructors¶

OE2DPath()

Default constructor. The starting point of the path have to be defined using the OE2DPath::AddStartPoint method.

OE2DPath(const OE2DPoint &start, bool closed=true)

Create a new path with a starting point.

start: The current point that will be starting point of the first line or curve.
closed: If true, than a line segment will be added from the starting point to the end point of the last line or curve segment of the path. See examples in Table: Examples of closed and open paths.

Note

The starting point of the path will be associated with the OE2DPathPointType::Start type when returned by the OE2DPath::GetPoints method.

**Examples of closed and open paths**¶
closed paths	open paths

OE2DPath(const OE2DPath &rhs)

Copy constructor.

OE2DPath(const OE2DPath &rhs, double scale)

Copy constructor with scaling.

scale: The scaling factor is used to create a new image from the given one. The scaling factor has to be a positive (non-zero) number.

OE2DPath(const OE2DPath &rhs, const OE2DPoint &offset)

Copy constructor with offset.

offset: The offset of new path relative to the copied one.

OE2DPath(const OE2DPath &rhs, const OE2DPoint &center, double degrees)

Copy constructor with rotation.

center: The center of the rotation.
degree: The rotation in degrees.

operator=¶

OE2DPath &operator=(const OE2DPath &rhs)

Assignment operator.

AddCurveSegment¶

void AddCurveSegment(const OE2DPoint &c1, const OE2DPoint &c2,
                     const OE2DPoint &end)

Adds a cubic Bézier curve to the path from the end point of the last line or curve segment of the path to the position end using c1 and c2 control points.

c1, c2: The control points of the curve.
end: The end point of the curve segment.

../../_images/OE2DPoint_AddCurveSegment.png

Example of adding a curve segment to a path¶

Note

Points added to the path with the OE2DPath::AddCurveSegment method will be associated with the following types when returned by the OE2DPath::GetPoints method:

See also

AddLineSegment¶

void AddLineSegment(const OE2DPoint &end)

Adds a line to the path from the end point of the last line or curve segment of the path to the position end.

end: The end point of the line segment.

../../_images/OE2DPoint_AddLineSegment.png

Example of adding a line segment to a path¶

Note

Points added to the path with the OE2DPath::AddLineSegment method will be associated with the OE2DPathPointType::LineEnd type when returned by the OE2DPath::GetPoints method.

See also

OE2DPoint class
OEImageBase::DrawLine method

AddStartPoint¶

void AddStartPoint(const OE2DPoint& start);

Adds the starting point of the path. If clears all previously added line or curve segments.

GetEnd¶

OE2DPoint  GetEnd() const;

Returns the end position of the path.

See also

OE2DPath::GetStart method

GetPoints¶

OESystem::OEIterBase<OE2DPathPoint> *GetPoints() const

Returns an iterator over all points of the path. Each point is associated with a type from the OE2DPathPointType namespace.

Example:

for (OEIter<const OE2DPathPoint> pi = path.GetPoints(); pi; ++pi)
{
  const OE2DPoint& pos = pi->GetPoint();
  std::cout << pos.GetX() << " " << pos.GetY() << " ";
  std::cout << pi->GetPointType() << std::endl;
}

See also

OE2DPathPoint class
OE2DPathPointType namespace

GetStart¶

OE2DPoint  GetStart() const;

Returns the starting position of the path.

See also

OE2DPath::GetEnd method

IsClosed¶

bool IsClosed() const

Returns whether a line segment will be added from the starting point to the end point of the last line or curve segment of the path. See examples in Table: Examples of closed and open paths.

See also

OE2DPath::SetClosed method

IsValid¶

bool IsValid() const

Returns whether the OE2DPath object is valid. A path is considered valid if it has a starting point.

SetClosed¶

void SetClosed(bool closed)

Sets whether a line segment will be added from the starting point to the end point of the last line or curve segment of the path.