Segment2

2023年2月21日

Library "Segment2"
Structure representation of a directed straight line in two dimensions from origin to target vectors.
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reference:
graphics.stanford.edu/courses/cs368/CGAL/ref-manual1/CGAL_Segment_2.html
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new(origin, target)
  Generate a new segment.
  Parameters:
    origin: Vector2 . Origin of the segment.
    target: Vector2 . Target of the segment.
  Returns: Segment2.

new(origin_x, origin_y, target_x, target_y)
  Generate a new segment.
  Parameters:
    origin_x: float . Origin of the segment x coordinate.
    origin_y: float . Origin of the segment y coordinate.
    target_x: float . Target of the segment x coordinate.
    target_y: float . Target of the segment y coordinate.
  Returns: Segment2.

copy(this)
  Copy a segment.
  Parameters:
    this: Vector2 . Segment to copy.
  Returns: Segment2.

length_squared(this)
  Squared length of the normalized segment vector. For comparing vectors this is computationaly lighter.
  Parameters:
    this: Segment2 . Sorce segment.
  Returns: float.

length(this)
  Length of the normalized segment vector.
  Parameters:
    this: Segment2 . Sorce segment.
  Returns: float.

opposite(this)
  Reverse the direction of the segment.
  Parameters:
    this: Segment2 . Source segment.
  Returns: Segment2.

is_degenerate(this)
  Segment is degenerate when origin and target are equal.
  Parameters:
    this: Segment2 . Source segment.
  Returns: bool.

is_horizontal(this)
  Segment is horizontal?.
  Parameters:
    this: Segment2 . Source segment.
  Returns: bool.

is_horizontal(this, precision)
  Segment is horizontal?.
  Parameters:
    this: Segment2 . Source segment.
    precision: float . Limit of precision.
  Returns: bool.

is_vertical(this)
  Segment is vertical?.
  Parameters:
    this: Segment2 . Source segment.
  Returns: bool.

is_vertical(this, precision)
  Segment is vertical?.
  Parameters:
    this: Segment2 . Source segment.
    precision: float . Limit of precision.
  Returns: bool.

equals(this, other)
  Tests two segments for equality (share same origin and target).
  Parameters:
    this: Segment2 . Source segment.
    other: Segment2 . Target segment.
  Returns: bool.

nearest_to_point(this, point)
  Find the nearest point in a segment to another point.
  Parameters:
    this: Segment2 . Source segment.
    point: Vector2 . Point to aproximate.
  Returns: Vector2.

intersection(this, other)
  Find the intersection vector of 2 lines.
  Parameters:
    this: Segment2 . Segment A.
    other: Segment2 . Segment B.
  Returns: Vector2.Vector2 Object.

extend(this, at_origin, at_target)
  Extend a segment by the percent ratio provided.
  Parameters:
    this: Segment2 . Source segment.
    at_origin: float . Percent ratio to extend at origin vector.
    at_target: float . Percent ratio to extend at target vector.
  Returns: Segment2.

to_string(this)
  Translate segment to string format `( (x,y), (x,y) )`.
  Parameters:
    this: Segment2 . Source segment.
  Returns: string.

to_string(this, format)
  Translate segment to string format `((x,y), (x,y))`.
  Parameters:
    this: Segment2 . Source segment.
    format: string . Format string to apply.
  Returns: string.

to_array(this)
  Translate segment to array format.
  Parameters:
    this: Segment2 . Source segment.
  Returns: array<float>.