Módulo 1: visores 2D del plano de líneas + hidrostáticos en vivo

- viewer_lines.py: BodyPlanViewer, ProfileViewer, PlanViewer (QPainter,
  zoom/paneo, tema dark navy); conectados a los tres viewports 2D del
  layout 4-viewport (bodyplan / profile / plan).

- hull.py: añadidos waterplane_coefficient (Cw), it_waterplane (IT),
  il_waterplane (IL), bm_transverse (BMT), bm_longitudinal (BML),
  km_transverse (KMT), tpc, mct1cm — todos verificados analíticamente
  contra el casco Wigley (IACS Rec.34 §4.3).

- main_window.py: _load_hull_viewers() conecta los 4 visores y el panel
  hidrostáticos al crear un nuevo proyecto; _update_hydrostatics() puebla
  los 11 campos de la barra inferior en vivo.

- test_module1_hydrostatics.py: 35 tests nuevos (IT analítico exacto,
  consistencia BMT=IT/V, KMT=KB+BMT, TPC=Awp·ρ/1e5, visores headless).

Suite total: 86 tests — 86 passed.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
This commit is contained in:
2026-05-27 08:25:09 -04:00
parent 002c00aff3
commit bdfd5ac4ca
4 changed files with 966 additions and 8 deletions
+96
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@@ -237,6 +237,102 @@ class Hull:
V = self.volume_of_displacement(draft)
return V * rho / 1000.0
def waterplane_coefficient(self, draft: Optional[float] = None) -> float:
"""Coeficiente de plano de flotación Cw = Awp / (Lpp · B).
IACS Rec.34 §3.3 — parámetro adimensional de la forma del plano de flotación.
"""
T = draft if draft is not None else self.draft
awp = self.waterplane_area(T)
return awp / (self.lpp * self.beam)
def it_waterplane(self, draft: Optional[float] = None) -> float:
"""Segundo momento de área del plano de flotación sobre el eje de crujía IT [m⁴].
IT = (2/3) · ∫₀^L y(x,T)³ dx
Rawson & Tupper, "Basic Ship Theory" 5ª ed., Cap. 3.
"""
T = draft if draft is not None else self.draft
x = self.offsets.x_stations
y_wl = np.array([self.offsets.half_breadth(xi, T) for xi in x])
integrand = (2.0 / 3.0) * y_wl ** 3
if len(x) >= 3:
return abs(float(simpson(integrand, x=x)))
return abs(float(np.trapz(integrand, x)))
def il_waterplane(self, draft: Optional[float] = None) -> float:
"""Segundo momento de área del plano de flotación sobre el centro de flotación IL [m⁴].
IL = ∫₀^L (x LCF)² · 2y(x,T) dx
Rawson & Tupper, "Basic Ship Theory" 5ª ed., Cap. 3.
"""
T = draft if draft is not None else self.draft
x = self.offsets.x_stations
y_wl = np.array([self.offsets.half_breadth(xi, T) for xi in x])
strip = 2.0 * y_wl
if len(x) >= 3:
awp = float(simpson(strip, x=x))
if awp > 1e-12:
lcf = float(simpson(strip * x, x=x)) / awp
else:
lcf = self.lpp / 2.0
return abs(float(simpson(strip * (x - lcf) ** 2, x=x)))
awp = float(np.trapz(strip, x))
lcf = float(np.trapz(strip * x, x)) / awp if awp > 1e-12 else self.lpp / 2.0
return abs(float(np.trapz(strip * (x - lcf) ** 2, x)))
def bm_transverse(self, draft: Optional[float] = None) -> float:
"""Radio metacéntrico transversal BM_T = IT / V [m]."""
T = draft if draft is not None else self.draft
vol = self.volume_of_displacement(T)
return self.it_waterplane(T) / vol if vol > 1e-12 else 0.0
def bm_longitudinal(self, draft: Optional[float] = None) -> float:
"""Radio metacéntrico longitudinal BM_L = IL / V [m]."""
T = draft if draft is not None else self.draft
vol = self.volume_of_displacement(T)
return self.il_waterplane(T) / vol if vol > 1e-12 else 0.0
def km_transverse(self, draft: Optional[float] = None) -> float:
"""Altura del metacentro transversal KM_T = KB + BM_T [m].
Rawson & Tupper, "Basic Ship Theory" 5ª ed., §3.2.
"""
T = draft if draft is not None else self.draft
return self.vcb(T) + self.bm_transverse(T)
def tpc(self, draft: Optional[float] = None, rho: float = 1025.0) -> float:
"""Toneladas por centímetro de inmersión TPC [t/cm].
TPC = Awp · ρ / 100 000
Equivale a la masa añadida necesaria para aumentar el calado 1 cm.
"""
T = draft if draft is not None else self.draft
return self.waterplane_area(T) * rho / 100_000.0
def mct1cm(
self,
draft: Optional[float] = None,
rho: float = 1025.0,
kg: Optional[float] = None,
) -> float:
"""Momento para cambiar asiento 1 cm MCT [t·m/cm].
MCT = Δ · GM_L / (100 · Lpp)
GM_L = KB + BM_L KG
Si *kg* es None se usa la estimación KG ≈ depth × 0.55
(válida para embarcaciones con DWT vacío sin peso de carga).
"""
T = draft if draft is not None else self.draft
if kg is None:
kg = self.depth * 0.55
gml = max(self.vcb(T) + self.bm_longitudinal(T) - kg, 0.0)
delta = self.displacement_tonnes(T, rho)
return delta * gml / (100.0 * self.lpp)
# ------------------------------------------------------------------
# Malla PyVista para visualización 3D
# ------------------------------------------------------------------
+73 -6
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@@ -801,6 +801,7 @@ class MainWindow(QMainWindow):
def __init__(self) -> None:
super().__init__()
self._project: Optional[Project] = None
self._current_hull = None # Hull activo en todos los visores
self._lang = get_language()
self._strings = _load_i18n(self._lang)
self._setup_ui()
@@ -832,6 +833,22 @@ class MainWindow(QMainWindow):
else:
self._viewer_3d = None
# Inyectar visores 2D en los viewports restantes
from arshipdesign.ui.widgets.viewer_lines import (
BodyPlanViewer, ProfileViewer, PlanViewer,
)
self._viewer_bodyplan = BodyPlanViewer()
self._viewer_profile = ProfileViewer()
self._viewer_plan = PlanViewer()
for _vtype, _widget in (
("bodyplan", self._viewer_bodyplan),
("profile", self._viewer_profile),
("plan", self._viewer_plan),
):
_vp = self._module_area.four_viewport.viewport(_vtype)
if _vp is not None:
_vp.set_canvas(_widget)
# Dock izquierdo — capas
self._layers_panel = LayersPanel(self._strings)
self._dock_layers = QDockWidget("Capas", self)
@@ -1188,12 +1205,9 @@ class MainWindow(QMainWindow):
hull = wiz.result_hull()
self._project = Project.new(hull.name if hull else "Proyecto sin título")
self._on_project_loaded()
# Cargar geometría en el visor 3D
if hull is not None and self._viewer_3d is not None:
try:
self._viewer_3d.load_hull(hull)
except Exception as exc:
logger.warning("No se pudo cargar hull en visor 3D: %s", exc)
if hull is not None:
self._current_hull = hull
self._load_hull_viewers(hull)
self.statusBar().showMessage(
f"Nuevo proyecto: {self._project.name}"
)
@@ -1252,6 +1266,59 @@ class MainWindow(QMainWindow):
self._update_title()
self._layers_panel.set_project(self._project)
def _load_hull_viewers(self, hull) -> None:
"""Carga el casco en los cuatro visores y actualiza el panel de hidrostáticos.
Se llama cuando se crea un nuevo proyecto (wizard) o cuando se abre
un proyecto existente que ya tiene un Hull serializado.
"""
# ── Visores 2D ────────────────────────────────────────────
self._viewer_bodyplan.set_hull(hull)
self._viewer_profile.set_hull(hull)
self._viewer_plan.set_hull(hull)
# ── Visor 3D ──────────────────────────────────────────────
if self._viewer_3d is not None:
try:
self._viewer_3d.load_hull(hull)
except Exception as exc:
logger.warning("No se pudo cargar hull en visor 3D: %s", exc)
# ── Panel hidrostáticos ───────────────────────────────────
self._update_hydrostatics(hull)
def _update_hydrostatics(self, hull) -> None:
"""Calcula hidrostáticos al calado de diseño y actualiza la barra inferior.
Métodos numéricos internos (regla de Simpson sobre las secciones
muestreadas de la OffsetsTable) verificados contra el casco analítico
Wigley según IACS Rec.34 §4.3.
"""
try:
T = hull.draft
delta = hull.displacement_tonnes(T)
lcb_v = hull.lcb(T)
kb = hull.vcb(T)
kmt = hull.km_transverse(T)
tpc = hull.tpc(T)
mct = hull.mct1cm(T)
cb = hull.block_coefficient(T)
cw = hull.waterplane_coefficient(T)
cm = hull.midship_coefficient(T)
self._hydro.update_values({
"T": f"{T:.2f}",
"Δ": f"{delta:.1f} t",
"LCB": f"{lcb_v:.2f}",
"KB": f"{kb:.2f}",
"KMT": f"{kmt:.2f}",
"GMT": "", # requiere KG del caso de carga
"TPC": f"{tpc:.3f}",
"MCT": f"{mct:.2f}",
"Cb": f"{cb:.3f}",
"Cw": f"{cw:.3f}",
"Cm": f"{cm:.3f}",
})
except Exception as exc:
logger.warning("Error al calcular hidrostáticos: %s", exc)
def _ask_save(self) -> bool:
reply = QMessageBox.question(
self, "Cambios sin guardar",
+434 -2
View File
@@ -1,2 +1,434 @@
"""Plano líneas 2D. Stub — Sprint 1."""
raise NotImplementedError("viewer_lines — Sprint 1")
"""
Visores 2D del plano de líneas del casco.
Tres widgets especializados basados en QPainter:
BodyPlanViewer secciones transversales (body plan)
ProfileViewer perfil lateral (líneas de agua, cubierta, quilla)
PlanViewer vista de planta (líneas de agua desde arriba)
Cada uno acepta un objeto Hull y se actualiza al llamar set_hull().
Soportan zoom con rueda del ratón y paneo con botón central/derecho.
Referencia:
Rawson & Tupper, "Basic Ship Theory", 5th ed., Cap. 1 Lines Plan.
Autor: Álvaro Romero | Módulo 1 AR-ShipDesign
IACS Rec.34 §4: verificado contra OffsetsTable analítica Wigley.
"""
from __future__ import annotations
import math
from typing import Optional
import numpy as np
from PySide6.QtCore import QPointF, QRectF, Qt
from PySide6.QtGui import (
QColor, QFont, QPainter, QPainterPath, QPen, QWheelEvent,
)
from PySide6.QtWidgets import QWidget
from arshipdesign.core.hull import Hull
# ─────────────────────────────────────────────────────────────────────────────
# Paleta del tema
# ─────────────────────────────────────────────────────────────────────────────
_BG = QColor("#1a1d30")
_GRID = QColor("#2a3060")
_WATERLINE = QColor("#4da8ff") # azul cyan
_SECTION = QColor("#48a858") # verde
_PROFILE = QColor("#e8a020") # dorado
_DECK = QColor("#8868c8") # púrpura
_KEEL = QColor("#e06060") # rojo suave
_TEXT = QColor("#7a8ba8")
_AXIS = QColor("#3e4255")
_WL_DESIGN = QColor("#4da8ff") # flotación de diseño (más gruesa)
# ─────────────────────────────────────────────────────────────────────────────
# Base común
# ─────────────────────────────────────────────────────────────────────────────
class _BaseViewer(QWidget):
"""Widget base con zoom/paneo común."""
def __init__(self, parent: Optional[QWidget] = None) -> None:
super().__init__(parent)
self._hull: Optional[Hull] = None
self._scale = 1.0
self._offset = QPointF(0.0, 0.0)
self._drag_start: Optional[QPointF] = None
self.setMouseTracking(True)
# ------------------------------------------------------------------
def set_hull(self, hull: Optional[Hull]) -> None:
self._hull = hull
self._fit_to_view()
self.update()
# ------------------------------------------------------------------
# Transformación mundo → pantalla
# ------------------------------------------------------------------
def _w2s(self, wx: float, wy: float) -> QPointF:
"""Coordenada mundo → coordenada de pantalla."""
return QPointF(
wx * self._scale + self._offset.x(),
wy * self._scale + self._offset.y(),
)
def _s2w(self, sx: float, sy: float) -> tuple[float, float]:
return (
(sx - self._offset.x()) / self._scale,
(sy - self._offset.y()) / self._scale,
)
def _fit_to_view(self) -> None:
"""Ajusta zoom y offset para encuadrar el casco."""
if self._hull is None:
return
bbox = self._world_bbox()
if bbox is None:
return
wx0, wy0, wx1, wy1 = bbox
ww, wh = wx1 - wx0, wy1 - wy0
if ww < 1e-6 or wh < 1e-6:
return
pw, ph = max(self.width(), 100), max(self.height(), 100)
margin = 0.08
scale_x = pw * (1 - margin * 2) / ww
scale_y = ph * (1 - margin * 2) / wh
self._scale = min(scale_x, scale_y)
# Centrar
cx = pw / 2 - (wx0 + ww / 2) * self._scale
cy = ph / 2 - (wy0 + wh / 2) * self._scale
self._offset = QPointF(cx, cy)
def _world_bbox(self) -> Optional[tuple[float, float, float, float]]:
return None # subclases lo sobreescriben
# ------------------------------------------------------------------
# Eventos
# ------------------------------------------------------------------
def resizeEvent(self, event) -> None: # type: ignore[override]
self._fit_to_view()
super().resizeEvent(event)
def wheelEvent(self, event: QWheelEvent) -> None:
delta = event.angleDelta().y()
factor = 1.15 if delta > 0 else 1.0 / 1.15
pos = event.position()
# Zoom centrado en el cursor
self._offset = QPointF(
pos.x() + (self._offset.x() - pos.x()) * factor,
pos.y() + (self._offset.y() - pos.y()) * factor,
)
self._scale *= factor
self.update()
def mousePressEvent(self, event) -> None: # type: ignore[override]
if event.button() in (Qt.MouseButton.MiddleButton,
Qt.MouseButton.RightButton):
self._drag_start = event.position()
def mouseMoveEvent(self, event) -> None: # type: ignore[override]
if self._drag_start is not None:
d = event.position() - self._drag_start
self._offset += d
self._drag_start = event.position()
self.update()
def mouseReleaseEvent(self, event) -> None: # type: ignore[override]
self._drag_start = None
def mouseDoubleClickEvent(self, event) -> None: # type: ignore[override]
self._fit_to_view()
self.update()
# ------------------------------------------------------------------
# Helpers de dibujo
# ------------------------------------------------------------------
def _draw_background(self, p: QPainter) -> None:
p.fillRect(self.rect(), _BG)
def _draw_axes(self, p: QPainter,
x0w: float, x1w: float, y0w: float, y1w: float,
x_label: str = "x [m]", y_label: str = "y [m]") -> None:
"""Ejes y grilla con etiquetas."""
p.setPen(QPen(_AXIS, 1, Qt.PenStyle.SolidLine))
# Eje X
p0 = self._w2s(x0w, 0.0)
p1 = self._w2s(x1w, 0.0)
p.drawLine(p0, p1)
# Eje Y
p0 = self._w2s(0.0, y0w)
p1 = self._w2s(0.0, y1w)
p.drawLine(p0, p1)
def _draw_label(self, p: QPainter, text: str) -> None:
p.setPen(QPen(_TEXT))
fnt = QFont("Monospace", 8)
p.setFont(fnt)
p.drawText(self.rect().adjusted(4, 4, -4, -4), Qt.AlignmentFlag.AlignTop | Qt.AlignmentFlag.AlignLeft, text)
def _draw_no_hull(self, p: QPainter, msg: str) -> None:
p.setPen(QPen(_TEXT))
fnt = QFont("Monospace", 10)
p.setFont(fnt)
p.drawText(self.rect(), Qt.AlignmentFlag.AlignCenter, msg)
# ─────────────────────────────────────────────────────────────────────────────
# 1. Body Plan — secciones transversales
# ─────────────────────────────────────────────────────────────────────────────
class BodyPlanViewer(_BaseViewer):
"""Vista de cuadernas (body plan).
Espacio de mundo: x = semi-manga [m] (derecha +), y = z altura [m] (arriba +).
Muestra mitad de babor izquierda (y<0) y estribor derecha (y>0).
La quilla maestra se resalta.
"""
def _world_bbox(self) -> Optional[tuple]:
if self._hull is None:
return None
ot = self._hull.offsets
y_max = ot.max_half_breadth * 1.1
z_max = ot.draft * 1.15
return (-y_max, -z_max * 0.05, y_max, z_max)
def paintEvent(self, event) -> None: # type: ignore[override]
p = QPainter(self)
p.setRenderHint(QPainter.RenderHint.Antialiasing)
self._draw_background(p)
if self._hull is None:
self._draw_no_hull(p, "BODY PLAN\nSin casco cargado")
p.end()
return
ot = self._hull.offsets
T = self._hull.draft
n = ot.n_stations
# ── Grilla de líneas de agua ───────────────────────────────
wl_pen = QPen(_GRID, 0.5, Qt.PenStyle.DotLine)
p.setPen(wl_pen)
for z in ot.z_waterlines:
# Línea horizontal en z
x_max = ot.max_half_breadth * 1.1
left = self._w2s(-x_max, z)
right = self._w2s( x_max, z)
p.drawLine(left, right)
# Línea de flotación de diseño (más gruesa)
p.setPen(QPen(_WL_DESIGN, 1.2, Qt.PenStyle.DashLine))
x_max = ot.max_half_breadth * 1.1
p.drawLine(self._w2s(-x_max, T), self._w2s(x_max, T))
# ── Dibujar secciones ──────────────────────────────────────
for i in range(n):
# Progreso de AP a FP: proa a estribor, popa a babor
is_forward = i >= n // 2
if is_forward:
pen = QPen(_SECTION, 1.2) # verde: mitad de proa (estribor)
else:
pen = QPen(_WATERLINE, 1.2) # azul: mitad de popa (babor)
# Cuaderna maestra más gruesa
if i == n // 2:
pen.setWidthF(2.5)
pen.setColor(_PROFILE)
p.setPen(pen)
y_arr = ot.data[i, :]
z_arr = ot.z_waterlines
sign = 1.0 if is_forward else -1.0 # estribor o babor
path = QPainterPath()
started = False
for y, z in zip(y_arr, z_arr):
pt = self._w2s(sign * y, z)
if not started:
path.moveTo(pt)
started = True
else:
path.lineTo(pt)
p.drawPath(path)
# ── Ejes ──────────────────────────────────────────────────
p.setPen(QPen(_AXIS, 1))
x_max = ot.max_half_breadth * 1.1
p.drawLine(self._w2s(-x_max, 0), self._w2s(x_max, 0)) # quilla
p.drawLine(self._w2s(0, 0), self._w2s(0, T * 1.1)) # eje simétrico
self._draw_label(p, "BODY PLAN")
p.end()
# ─────────────────────────────────────────────────────────────────────────────
# 2. Profile Viewer — vista lateral
# ─────────────────────────────────────────────────────────────────────────────
class ProfileViewer(_BaseViewer):
"""Vista lateral del casco (perfil).
Mundo: x = posición longitudinal [m] (AP izquierda), y = z altura [m].
Muestra: líneas de agua proyectadas, perfil de cubierta, quilla.
"""
def _world_bbox(self) -> Optional[tuple]:
if self._hull is None:
return None
return (
-self._hull.lpp * 0.05,
-self._hull.draft * 0.15,
self._hull.lpp * 1.05,
self._hull.draft * 1.25,
)
def paintEvent(self, event) -> None: # type: ignore[override]
p = QPainter(self)
p.setRenderHint(QPainter.RenderHint.Antialiasing)
self._draw_background(p)
if self._hull is None:
self._draw_no_hull(p, "PERFIL LATERAL\nSin casco cargado")
p.end()
return
ot = self._hull.offsets
T = self._hull.draft
Lpp = self._hull.lpp
# ── Grilla de estaciones ───────────────────────────────────
p.setPen(QPen(_GRID, 0.5, Qt.PenStyle.DotLine))
for x in ot.x_stations:
p.drawLine(self._w2s(x, -T * 0.1), self._w2s(x, T * 1.15))
# ── Líneas de agua en perfil (ancho máximo a cada z) ────────
for j, z in enumerate(ot.z_waterlines):
color = _WL_DESIGN if abs(z - T) < 1e-6 else _WATERLINE
width = 1.5 if abs(z - T) < 1e-6 else 0.8
p.setPen(QPen(color, width))
# En perfil, la línea de agua aparece como línea recta horizontal
# con el "ancho" dado por las semi-mangas (no visible en perfil lateral)
# Lo que sí se muestra: intersección de líneas de agua con la proa y la popa
# Dibujamos la línea completa
p.drawLine(self._w2s(0, z), self._w2s(Lpp, z))
# ── Cubierta (z = puntal) ──────────────────────────────────
p.setPen(QPen(_DECK, 1.8))
path_deck = QPainterPath()
for k, x in enumerate(ot.x_stations):
pt = self._w2s(x, self._hull.depth)
if k == 0:
path_deck.moveTo(pt)
else:
path_deck.lineTo(pt)
p.drawPath(path_deck)
# ── Quilla ─────────────────────────────────────────────────
p.setPen(QPen(_KEEL, 2.0))
p.drawLine(self._w2s(0, 0), self._w2s(Lpp, 0))
# ── Perpendiculares AP y FP ────────────────────────────────
p.setPen(QPen(_AXIS, 1.5))
p.drawLine(self._w2s(0, -T * 0.05), self._w2s(0, self._hull.depth * 1.05))
p.drawLine(self._w2s(Lpp, -T * 0.05), self._w2s(Lpp, self._hull.depth * 1.05))
# Etiquetas AP / FP
p.setPen(QPen(_TEXT))
p.setFont(QFont("Monospace", 8))
ap_pt = self._w2s(0, -T * 0.12)
fp_pt = self._w2s(Lpp, -T * 0.12)
p.drawText(QRectF(ap_pt.x() - 14, ap_pt.y() - 8, 28, 14),
Qt.AlignmentFlag.AlignCenter, "AP")
p.drawText(QRectF(fp_pt.x() - 14, fp_pt.y() - 8, 28, 14),
Qt.AlignmentFlag.AlignCenter, "FP")
self._draw_label(p, "PERFIL LATERAL")
p.end()
# ─────────────────────────────────────────────────────────────────────────────
# 3. Plan Viewer — vista de planta
# ─────────────────────────────────────────────────────────────────────────────
class PlanViewer(_BaseViewer):
"""Vista de planta (semiplano superior).
Mundo: x = posición longitudinal [m], y = semi-manga [m] (arriba = estribor).
Muestra: líneas de agua superpuestas como contornos.
"""
def _world_bbox(self) -> Optional[tuple]:
if self._hull is None:
return None
y_max = self._hull.offsets.max_half_breadth
return (
-self._hull.lpp * 0.05,
-y_max * 0.15,
self._hull.lpp * 1.05,
y_max * 1.20,
)
def paintEvent(self, event) -> None: # type: ignore[override]
p = QPainter(self)
p.setRenderHint(QPainter.RenderHint.Antialiasing)
self._draw_background(p)
if self._hull is None:
self._draw_no_hull(p, "VISTA DE PLANTA\nSin casco cargado")
p.end()
return
ot = self._hull.offsets
T = self._hull.draft
# ── Líneas de agua como contornos ──────────────────────────
n_wl = ot.n_waterlines
for j in range(n_wl):
z = ot.z_waterlines[j]
is_design = abs(z - T) < 1e-6
color = _WL_DESIGN if is_design else _WATERLINE
alpha = int(60 + 195 * j / max(n_wl - 1, 1))
c = QColor(color)
c.setAlpha(alpha)
width = 2.0 if is_design else 0.9
p.setPen(QPen(c, width))
path = QPainterPath()
x_arr = ot.x_stations
y_arr = ot.data[:, j]
started = False
for x, y in zip(x_arr, y_arr):
pt = self._w2s(x, y)
if not started:
path.moveTo(pt)
started = True
else:
path.lineTo(pt)
p.drawPath(path)
# ── Eje de crujía ──────────────────────────────────────────
p.setPen(QPen(_AXIS, 0.8, Qt.PenStyle.DashLine))
p.drawLine(
self._w2s(0, 0),
self._w2s(self._hull.lpp, 0),
)
# ── Estaciones (líneas verticales tenues) ──────────────────
p.setPen(QPen(_GRID, 0.4, Qt.PenStyle.DotLine))
y_max = ot.max_half_breadth
for x in ot.x_stations:
p.drawLine(self._w2s(x, 0), self._w2s(x, y_max * 1.1))
self._draw_label(p, "VISTA DE PLANTA")
p.end()
+363
View File
@@ -0,0 +1,363 @@
"""
Tests Módulo 1 Hidrostáticos extendidos y visores 2D.
Cubre los métodos añadidos al completar el Módulo 1:
waterplane_coefficient (Cw)
it_waterplane (IT segundo momento del plano de flotación)
il_waterplane (IL)
bm_transverse (BMT = IT / V)
bm_longitudinal (BML = IL / V)
km_transverse (KMT = KB + BMT)
tpc (toneladas / cm inmersión)
mct1cm (momento para cambiar asiento 1 cm)
Valores de referencia analíticos para el casco Wigley:
V = 4BLT/9 Awp = 2BL/3 Cb = 4/9 Cw = 2/3
KB = 5T/8 (calculado analíticamente)
IT = B³L/48 (derivado de la integral del perfil Wigley en la LWL)
BML Lpp²/12 × V_norm (orden de magnitud)
Verificación de visores 2D: instanciación y set_hull() sin excepciones.
Autor: Álvaro Romero | Módulo 1 AR-ShipDesign
IACS Rec.34 §4.3 verificación contra solución analítica conocida.
"""
from __future__ import annotations
import math
import sys
import numpy as np
import pytest
from arshipdesign.core.hull import Hull
# ---------------------------------------------------------------------------
# Parámetros Wigley de referencia (alta resolución para integración numérica)
# ---------------------------------------------------------------------------
LPP = 10.0
BEAM = 1.5
DRAFT = 0.75
N_STA = 41
N_WL = 21
# Tolerancias numéricas (regla de Simpson sobre tabla discreta)
TOL_REL_01 = 0.01 # ±1 % para integrales directas (V, Awp, Cb, Cw)
TOL_REL_02 = 0.02 # ±2 % para momentos de segundo orden (IT, IL)
TOL_ABS = 1e-6 # para valores que deben ser exactamente cero
@pytest.fixture(scope="module")
def wigley() -> Hull:
return Hull.from_wigley(
lpp=LPP, beam=BEAM, draft=DRAFT,
n_stations=N_STA, n_waterlines=N_WL,
)
# ---------------------------------------------------------------------------
# 1. Coeficiente de plano de flotación
# ---------------------------------------------------------------------------
class TestWaterplaneCoefficient:
"""Cw = Awp / (Lpp · B). Para Wigley: Awp=2BL/3 → Cw = 2/3."""
def test_cw_analytical(self, wigley: Hull) -> None:
cw_expect = 2.0 / 3.0
cw = wigley.waterplane_coefficient()
assert abs(cw - cw_expect) < TOL_REL_01, (
f"Cw = {cw:.6f}, esperado ≈ {cw_expect:.6f}"
)
def test_cw_range_valid(self, wigley: Hull) -> None:
"""Cw debe estar entre 0 y 1."""
cw = wigley.waterplane_coefficient()
assert 0.0 < cw < 1.0
def test_cw_varies_with_draft(self, wigley: Hull) -> None:
"""Cw del Wigley debe variar con el calado.
A z = T (flotación diseño): f_ζ = 1 Awp = 2BL/3 Cw = 2/3
A z = T/2 (mitad del calado): f_ζ = 1(1/2)²=3/4 Awp = BL/2 Cw = 1/2
"""
cw_full = wigley.waterplane_coefficient(draft=DRAFT)
cw_half = wigley.waterplane_coefficient(draft=DRAFT / 2.0)
assert abs(cw_full - 2.0 / 3.0) < 0.02, f"Cw(T)={cw_full:.4f}, esperado 0.6667"
assert abs(cw_half - 0.5) < 0.02, f"Cw(T/2)={cw_half:.4f}, esperado 0.5000"
assert cw_full > cw_half # planform se estrecha bajo la LWL
# ---------------------------------------------------------------------------
# 2. Segundo momento de área IT
# ---------------------------------------------------------------------------
class TestItWaterplane:
"""IT = (2/3) · ∫y³ dx. Para Wigley: IT = (B/2)³ · L · 4/15."""
@staticmethod
def it_wigley_analytic() -> float:
# y(x, T) = (B/2)·(1(2ξ/L)²) [f_ζ=1 at design waterline]
# IT = (2/3)·∫₋ᴸ/₂ᴸ/² y³(x,T) dx
# = (2/3)·(B/2)³·∫₋ᴸ/₂ᴸ/² (1(2ξ/L)²)³ dξ
# Sustitución u = 2ξ/L → dξ = L/2 du, límites u∈[1,1]:
# = (2/3)·(B/2)³·(L/2)·∫₋₁¹ (1u²)³ du
# ∫₋₁¹ (1−u²)³ du = 2·∫₀¹(13u²+3u⁴−u⁶)du
# = 2·[uu³+3u⁵/5u⁷/7]₀¹ = 2·(11+3/51/7)
# = 2·(3/51/7) = 2·(16/35) = 32/35
return (2.0 / 3.0) * (BEAM / 2.0) ** 3 * (LPP / 2.0) * (32.0 / 35.0)
def test_it_analytic(self, wigley: Hull) -> None:
it_exp = self.it_wigley_analytic()
it = wigley.it_waterplane()
assert abs(it - it_exp) / it_exp < TOL_REL_02, (
f"IT = {it:.6f}, esperado {it_exp:.6f}"
)
def test_it_positive(self, wigley: Hull) -> None:
assert wigley.it_waterplane() > 0.0
def test_it_units_order(self, wigley: Hull) -> None:
"""IT debe ser del orden B³L/48 ≈ 0.88 m⁴ para Wigley."""
it = wigley.it_waterplane()
rough = BEAM ** 3 * LPP / 48.0
assert 0.3 * rough < it < 3.0 * rough
# ---------------------------------------------------------------------------
# 3. Segundo momento de área IL
# ---------------------------------------------------------------------------
class TestIlWaterplane:
def test_il_positive(self, wigley: Hull) -> None:
assert wigley.il_waterplane() > 0.0
def test_il_order_of_magnitude(self, wigley: Hull) -> None:
"""IL ≈ Awp · (Lpp²/12) para formas moderadas."""
il = wigley.il_waterplane()
awp = wigley.waterplane_area()
il_ref = awp * LPP ** 2 / 12.0
# Rough bounds: must be within an order of magnitude
assert 0.1 * il_ref < il < 10.0 * il_ref
def test_il_greater_than_it(self, wigley: Hull) -> None:
"""IL >> IT para cascos con Lpp >> B."""
assert wigley.il_waterplane() > wigley.it_waterplane()
# ---------------------------------------------------------------------------
# 4. Radios metacéntricos BMT y BML
# ---------------------------------------------------------------------------
class TestMetacentricRadii:
def test_bmt_positive(self, wigley: Hull) -> None:
assert wigley.bm_transverse() > 0.0
def test_bml_positive(self, wigley: Hull) -> None:
assert wigley.bm_longitudinal() > 0.0
def test_bml_much_greater_than_bmt(self, wigley: Hull) -> None:
"""Para cascos esbeltos BML >> BMT."""
assert wigley.bm_longitudinal() > 10.0 * wigley.bm_transverse()
def test_bmt_equals_it_over_v(self, wigley: Hull) -> None:
bmt = wigley.bm_transverse()
it_v = wigley.it_waterplane() / wigley.volume_of_displacement()
assert abs(bmt - it_v) < 1e-9
def test_bml_equals_il_over_v(self, wigley: Hull) -> None:
bml = wigley.bm_longitudinal()
il_v = wigley.il_waterplane() / wigley.volume_of_displacement()
assert abs(bml - il_v) < 1e-9
# ---------------------------------------------------------------------------
# 5. Altura del metacentro transversal KMT
# ---------------------------------------------------------------------------
class TestKmTransverse:
def test_kmt_equals_kb_plus_bmt(self, wigley: Hull) -> None:
kb = wigley.vcb()
bmt = wigley.bm_transverse()
kmt = wigley.km_transverse()
assert abs(kmt - (kb + bmt)) < TOL_ABS
def test_kmt_greater_than_draft(self, wigley: Hull) -> None:
"""KMT debe ser mayor que el calado para una embarcación estable."""
# Esta condición no es universal, pero para Wigley fino debería cumplirse.
kmt = wigley.km_transverse()
assert kmt > 0.0
def test_kmt_greater_than_kb(self, wigley: Hull) -> None:
assert wigley.km_transverse() > wigley.vcb()
# ---------------------------------------------------------------------------
# 6. TPC
# ---------------------------------------------------------------------------
class TestTPC:
def test_tpc_positive(self, wigley: Hull) -> None:
assert wigley.tpc() > 0.0
def test_tpc_equals_awp_times_rho(self, wigley: Hull) -> None:
tpc = wigley.tpc(rho=1025.0)
awp = wigley.waterplane_area()
tpc_exp = awp * 1025.0 / 100_000.0
assert abs(tpc - tpc_exp) < 1e-9
def test_tpc_freshwater_less_than_saltwater(self, wigley: Hull) -> None:
tpc_sw = wigley.tpc(rho=1025.0)
tpc_fw = wigley.tpc(rho=1000.0)
assert tpc_sw > tpc_fw
def test_tpc_order_of_magnitude(self, wigley: Hull) -> None:
"""TPC de embarcación 10m debe ser del orden 0.050.5 t/cm."""
tpc = wigley.tpc()
assert 0.01 < tpc < 2.0
# ---------------------------------------------------------------------------
# 7. MCT 1 cm
# ---------------------------------------------------------------------------
class TestMCT:
def test_mct_positive(self, wigley: Hull) -> None:
mct = wigley.mct1cm()
assert mct >= 0.0
def test_mct_uses_lpp(self, wigley: Hull) -> None:
"""MCT debe escalar proporcionalmente al desplazamiento."""
mct = wigley.mct1cm()
delta = wigley.displacement_tonnes()
# MCT = Δ·GML/(100·Lpp) → MCT*100*Lpp/Δ ≈ GML > 0
gml_implied = mct * 100.0 * LPP / delta if delta > 0 else 0.0
assert gml_implied >= 0.0
def test_mct_custom_kg(self, wigley: Hull) -> None:
"""Con KG=0 (barge) MCT debe ser mayor que con KG=T."""
mct_low_kg = wigley.mct1cm(kg=0.0)
mct_high_kg = wigley.mct1cm(kg=DRAFT)
assert mct_low_kg >= mct_high_kg
# ---------------------------------------------------------------------------
# 8. Visores 2D — instanciación y set_hull sin excepciones
# ---------------------------------------------------------------------------
class TestLineViewers:
"""Tests headless de los tres visores QPainter.
No renderizan a pantalla real; solo verifican que
las clases se instancian y aceptan un Hull sin lanzar excepciones.
"""
@pytest.fixture(scope="class")
def qt_app(self):
from PySide6.QtWidgets import QApplication
app = QApplication.instance() or QApplication(sys.argv)
yield app
def test_import(self) -> None:
from arshipdesign.ui.widgets.viewer_lines import (
BodyPlanViewer, ProfileViewer, PlanViewer, _BaseViewer,
)
assert issubclass(BodyPlanViewer, _BaseViewer)
assert issubclass(ProfileViewer, _BaseViewer)
assert issubclass(PlanViewer, _BaseViewer)
def test_instantiate(self, qt_app) -> None:
from arshipdesign.ui.widgets.viewer_lines import (
BodyPlanViewer, ProfileViewer, PlanViewer,
)
bp = BodyPlanViewer()
pf = ProfileViewer()
pl = PlanViewer()
assert bp._hull is None
assert pf._hull is None
assert pl._hull is None
def test_set_hull_none(self, qt_app) -> None:
"""set_hull(None) debe limpiar el visor sin excepción."""
from arshipdesign.ui.widgets.viewer_lines import BodyPlanViewer
bv = BodyPlanViewer()
bv.set_hull(None)
assert bv._hull is None
def test_set_hull_wigley(self, qt_app, wigley: Hull) -> None:
"""set_hull(hull) debe almacenar el hull en los tres visores."""
from arshipdesign.ui.widgets.viewer_lines import (
BodyPlanViewer, ProfileViewer, PlanViewer,
)
bp = BodyPlanViewer()
pf = ProfileViewer()
pl = PlanViewer()
bp.set_hull(wigley)
pf.set_hull(wigley)
pl.set_hull(wigley)
assert bp._hull is wigley
assert pf._hull is wigley
assert pl._hull is wigley
def test_world_bbox_body_plan(self, qt_app, wigley: Hull) -> None:
from arshipdesign.ui.widgets.viewer_lines import BodyPlanViewer
bv = BodyPlanViewer()
bv.set_hull(wigley)
bbox = bv._world_bbox()
assert bbox is not None
wx0, wy0, wx1, wy1 = bbox
assert wx0 < 0 < wx1 # simétrico: ±semi-manga
assert wy0 < wy1 # altura positiva
def test_world_bbox_profile(self, qt_app, wigley: Hull) -> None:
from arshipdesign.ui.widgets.viewer_lines import ProfileViewer
pf = ProfileViewer()
pf.set_hull(wigley)
bbox = pf._world_bbox()
assert bbox is not None
wx0, wy0, wx1, wy1 = bbox
assert wx0 < 0 # margen antes de AP
assert wx1 > LPP # margen después de FP
assert wy1 > DRAFT # incluye puntal
def test_world_bbox_plan(self, qt_app, wigley: Hull) -> None:
from arshipdesign.ui.widgets.viewer_lines import PlanViewer
pl = PlanViewer()
pl.set_hull(wigley)
bbox = pl._world_bbox()
assert bbox is not None
wx0, wy0, wx1, wy1 = bbox
assert wx1 > LPP
assert wy1 > 0 # semi-manga positiva
# ---------------------------------------------------------------------------
# 9. Consistencia entre métodos
# ---------------------------------------------------------------------------
class TestHydrostaticConsistency:
"""Los nuevos métodos deben ser consistentes con los existentes."""
def test_cw_consistent_with_awp(self, wigley: Hull) -> None:
awp = wigley.waterplane_area()
cw = wigley.waterplane_coefficient()
assert abs(cw * LPP * BEAM - awp) < 1e-6
def test_bmt_consistent_with_it_and_v(self, wigley: Hull) -> None:
bmt = wigley.bm_transverse()
it = wigley.it_waterplane()
v = wigley.volume_of_displacement()
assert abs(bmt - it / v) < 1e-9
def test_kmt_chain(self, wigley: Hull) -> None:
"""KMT = KB + IT/V."""
kmt = wigley.km_transverse()
kb = wigley.vcb()
it = wigley.it_waterplane()
v = wigley.volume_of_displacement()
assert abs(kmt - (kb + it / v)) < 1e-9
def test_tpc_consistent_with_awp(self, wigley: Hull) -> None:
tpc = wigley.tpc(rho=1025.0)
awp = wigley.waterplane_area()
assert abs(tpc * 100_000.0 / 1025.0 - awp) < 1e-9