Antoine Anceau
6efb18bfba
- Implement Newton-Raphson solver for faster draft finding. - Implement mesh simplification using meshopt for faster GZ computation. - Expose simplify and to_simplified methods to Python. - Fix Rust clippy warnings and update documentation.
450 lines
10 KiB
ReStructuredText
450 lines
10 KiB
ReStructuredText
Geometry
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========
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Classes for defining hull geometry and vessel structure.
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Hull
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----
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.. py:class:: Hull(file_path)
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A hull geometry loaded from an STL file.
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:param file_path: Path to the STL file
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:type file_path: str
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.. py:staticmethod:: from_box(length, breadth, depth)
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Create a box hull.
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:param length: Length of the box in meters
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:type length: float
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:param breadth: Breadth of the box in meters
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:type breadth: float
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:param depth: Depth of the box in meters
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:type depth: float
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:returns: Hull object
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:rtype: Hull
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.. py:method:: get_bounds()
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Returns the bounding box of the hull.
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:returns: (xmin, xmax, ymin, ymax, zmin, zmax)
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:rtype: tuple[float, float, float, float, float, float]
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.. py:method:: num_triangles()
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Returns the number of triangles in the mesh.
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:rtype: int
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.. py:method:: num_vertices()
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Returns the number of vertices in the mesh.
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:rtype: int
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.. py:method:: transform(translation, rotation, pivot)
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Applies a transformation to the hull.
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:param translation: (dx, dy, dz) translation vector
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:param rotation: (rx, ry, rz) rotation angles in degrees
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:param pivot: (px, py, pz) pivot point for rotation
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.. py:method:: scale(factor)
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Scales the hull uniformly.
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:param factor: Scale factor
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.. py:method:: scale_xyz(sx, sy, sz)
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Scales the hull non-uniformly along each axis.
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:param sx: Scale factor along X axis
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:param sy: Scale factor along Y axis
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:param sz: Scale factor along Z axis
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.. py:method:: simplify(target_count)
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Simplifies the hull mesh to a target number of triangles (in-place).
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:param target_count: Target number of triangles
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:type target_count: int
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.. py:method:: to_simplified(target_count)
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Returns a simplified copy of the hull.
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:param target_count: Target number of triangles
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:type target_count: int
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:returns: Simplified Hull object
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:rtype: Hull
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.. py:method:: export_stl(file_path)
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Exports the hull to an STL file.
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:param file_path: Output file path
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.. py:method:: get_vertices()
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Returns the vertices of the hull mesh.
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:returns: List of (x, y, z) tuples
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:rtype: list[tuple[float, float, float]]
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.. py:method:: get_faces()
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Returns the faces (triangles) of the hull mesh.
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:returns: List of (i, j, k) indices tuples
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:rtype: list[tuple[int, int, int]]
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Vessel
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------
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.. py:class:: Vessel(hull)
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A vessel containing one or more hulls, tanks, and silhouettes.
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:param hull: The hull geometry
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:type hull: Hull
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.. py:attribute:: ap
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:type: float
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Aft Perpendicular position (x-coordinate).
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.. py:attribute:: fp
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:type: float
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Forward Perpendicular position (x-coordinate).
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.. py:attribute:: lbp
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:type: float
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Length Between Perpendiculars.
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.. py:method:: get_bounds()
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Returns the combined bounding box of all hulls.
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.. py:method:: num_hulls()
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Returns the number of hulls.
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.. py:method:: num_tanks()
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Returns the number of tanks.
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.. py:method:: add_tank(tank)
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Adds a tank to the vessel.
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:param tank: Tank to add
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:type tank: Tank
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.. py:method:: get_total_tanks_mass()
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Returns the total mass of all tank fluids in kg.
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.. py:method:: get_tanks_center_of_gravity()
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Returns the combined CoG of all tank fluids [x, y, z].
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.. py:method:: add_silhouette(silhouette)
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Adds a silhouette profile to the vessel.
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:param silhouette: Silhouette to add
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:type silhouette: Silhouette
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.. py:method:: num_silhouettes()
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Returns the number of silhouettes.
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:rtype: int
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.. py:method:: has_silhouettes()
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Returns True if any silhouettes are defined.
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:rtype: bool
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.. py:method:: clear_silhouettes()
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Removes all silhouettes from the vessel.
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.. py:method:: get_total_emerged_area(waterline_z)
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Returns the total emerged area from all silhouettes (m²).
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:param waterline_z: Waterline Z coordinate
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:type waterline_z: float
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:rtype: float
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.. py:method:: get_combined_emerged_centroid(waterline_z)
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Returns the combined centroid of all emerged areas [x, z].
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:param waterline_z: Waterline Z coordinate
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:type waterline_z: float
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:rtype: list[float]
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.. py:method:: add_opening(opening)
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Adds a downflooding opening to the vessel.
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:param opening: Opening to add
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:type opening: DownfloodingOpening
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.. py:method:: num_openings()
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Returns the number of downflooding openings.
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:rtype: int
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.. py:method:: clear_openings()
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Removes all downflooding openings from the vessel.
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.. py:method:: get_hulls()
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Get all hulls in the vessel.
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:returns: List of Hull objects
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:rtype: list[Hull]
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.. py:method:: get_tanks()
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Get all tanks in the vessel.
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:returns: List of Tank objects
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:rtype: list[Tank]
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.. py:method:: get_silhouettes()
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Get all silhouettes in the vessel.
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:returns: List of Silhouette objects
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:rtype: list[Silhouette]
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.. py:method:: get_openings()
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Get all downflooding openings in the vessel.
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:returns: List of DownfloodingOpening objects
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:rtype: list[DownfloodingOpening]
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Silhouette
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----------
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.. py:class:: Silhouette(file_path)
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A 2D silhouette profile in the X-Z plane for wind heeling calculations.
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Used for calculating wind heeling moments per IMO 2008 IS Code (MSC.267).
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:param file_path: Path to the geometry file (DXF, VTK, VTP)
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:type file_path: str
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.. py:staticmethod:: from_points(points, name)
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Create a silhouette from a list of (x, z) points.
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:param points: List of (x, z) tuples defining the contour
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:type points: list[tuple[float, float]]
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:param name: Silhouette name
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:type name: str
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:returns: Silhouette object
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:rtype: Silhouette
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.. py:attribute:: name
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:type: str
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Silhouette name (from filename or user-defined).
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.. py:method:: num_points()
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Returns the number of points in the contour.
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:rtype: int
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.. py:method:: is_closed()
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Returns True if the contour is closed (first == last point).
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:rtype: bool
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.. py:method:: get_points()
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Returns the points as a list of (x, y, z) tuples.
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:rtype: list[tuple[float, float, float]]
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.. py:method:: get_area()
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Returns the total lateral area (m²).
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:rtype: float
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.. py:method:: get_centroid()
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Returns the centroid [x, z].
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:rtype: list[float]
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.. py:method:: get_bounds()
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Returns the bounding box (x_min, x_max, z_min, z_max).
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:rtype: tuple[float, float, float, float]
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.. py:method:: get_emerged_area(waterline_z)
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Returns the emerged area above waterline (m²).
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:param waterline_z: Waterline Z coordinate
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:type waterline_z: float
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:rtype: float
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.. py:method:: get_emerged_centroid(waterline_z)
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Returns the centroid of the emerged area [x, z].
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:param waterline_z: Waterline Z coordinate
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:type waterline_z: float
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:rtype: list[float]
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OpeningType
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-----------
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.. py:class:: OpeningType
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Type of opening that can cause downflooding.
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.. py:staticmethod:: vent()
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Ventilator opening.
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.. py:staticmethod:: air_pipe()
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Air pipe without automatic closing device.
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.. py:staticmethod:: hatch()
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Hatch or manhole.
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.. py:staticmethod:: door()
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Weathertight door (kept open for operation).
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.. py:staticmethod:: window()
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Non-weathertight window.
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.. py:staticmethod:: other(name)
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Custom opening type.
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:param name: Opening type name
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:type name: str
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DownfloodingOpening
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-------------------
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.. py:class:: DownfloodingOpening
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A downflooding opening point or contour for θf calculation.
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Per IMO 2008 IS Code, used to determine when non-weathertight
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openings become submerged during heel.
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.. py:staticmethod:: from_point(name, position, opening_type)
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Create opening from a single point.
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:param name: Opening name
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:type name: str
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:param position: (x, y, z) position in ship coordinates
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:type position: tuple[float, float, float]
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:param opening_type: Type of opening
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:type opening_type: OpeningType
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:returns: DownfloodingOpening object
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:rtype: DownfloodingOpening
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.. py:staticmethod:: from_contour(name, points, opening_type)
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Create opening from a contour (polyline boundary).
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:param name: Opening name
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:type name: str
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:param points: List of (x, y, z) tuples defining the boundary
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:type points: list[tuple[float, float, float]]
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:param opening_type: Type of opening
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:type opening_type: OpeningType
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:returns: DownfloodingOpening object
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:rtype: DownfloodingOpening
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.. py:staticmethod:: from_file(file_path, default_type, name=None)
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Load openings from a file (DXF or VTK).
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If ``name`` is provided:
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- Single opening: sets logic name to ``name``
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- Multiple openings: sets names to ``{name}_{i+1}``
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:param file_path: Path to the geometry file (DXF, VTK, VTP)
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:type file_path: str
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:param default_type: Default OpeningType for loaded openings
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:type default_type: OpeningType
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:param name: Optional base name for loaded openings
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:type name: str or None
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.. py:attribute:: name
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:type: str
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Opening name.
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.. py:attribute:: is_active
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:type: bool
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Whether opening is active in calculations.
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.. py:method:: set_active(active)
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Set opening active state.
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:param active: True to include in calculations
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:type active: bool
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.. py:method:: num_points()
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Returns the number of points defining the opening.
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:rtype: int
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.. py:method:: get_points()
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Returns points as list of (x, y, z) tuples.
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:rtype: list[tuple[float, float, float]]
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.. py:method:: is_submerged(heel, trim, pivot, waterline_z)
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Check if opening is submerged at given conditions.
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:param heel: Heel angle in degrees
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:type heel: float
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:param trim: Trim angle in degrees
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:type trim: float
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:param pivot: Rotation pivot (x, y, z)
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:type pivot: tuple[float, float, float]
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:param waterline_z: Waterline Z coordinate
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:type waterline_z: float
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:rtype: bool
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