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get_side_area - add angle argument

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Andrej730
2024-12-27 17:56:28 +05:00
parent 810ad58c06
commit 6c6e40b07c
1 changed files with 9 additions and 3 deletions
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src/ifcopenshell-python/ifcopenshell/util/shape.py
+9 -3
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@@ -24,6 +24,8 @@ import ifcopenshell.ifcopenshell_wrapper as W
import ifcopenshell.util.element import ifcopenshell.util.element
import ifcopenshell.util.placement import ifcopenshell.util.placement
import ifcopenshell.util.representation import ifcopenshell.util.representation
from ifcopenshell.util.shape_builder import VectorType
from math import radians, cos
from ifcopenshell.geom import ShapeElementType, ShapeType from ifcopenshell.geom import ShapeElementType, ShapeType
from typing import Optional, Literal, Union, Iterable from typing import Optional, Literal, Union, Iterable
@@ -471,7 +473,8 @@ def get_area(geometry: ShapeType) -> float:
def get_side_area( def get_side_area(
geometry: ShapeType, geometry: ShapeType,
axis: AXIS_LITERAL = "Y", axis: AXIS_LITERAL = "Y",
direction: Optional[VECTOR_3D] = None, direction: Optional[VectorType] = None,
angle: float = 90.0,
) -> float: ) -> float:
"""Calculates the total surface area of surfaces that are visible from the specified axis """Calculates the total surface area of surfaces that are visible from the specified axis
@@ -489,6 +492,8 @@ def get_side_area(
:param geometry: Geometry output calculated by IfcOpenShell :param geometry: Geometry output calculated by IfcOpenShell
:param axis: Either X, Y, or Z. Defaults to Y, which is used for standard :param axis: Either X, Y, or Z. Defaults to Y, which is used for standard
walls. walls.
:param angle: Accept angle difference between face and axis, in degrees.
E.g. default angle 90 will find all faces with angle < 90 degrees.
:return: The surface area. :return: The surface area.
""" """
if direction is None: if direction is None:
@@ -508,9 +513,10 @@ def get_side_area(
# Find the faces with a normal vector pointing in the desired +Y normal direction # Find the faces with a normal vector pointing in the desired +Y normal direction
# normal_tol < 0 is pointing away, = 0 is perpendicular, and > 0 is pointing towards. # normal_tol < 0 is pointing away, = 0 is perpendicular, and > 0 is pointing towards.
normal_tol = 0.01 # Close to perpendicular, but with a fuzz for numerical tolerance normal_tol = 0.01 # For angle 90 it's close to perpendicular, but with a fuzz for numerical tolerance
acceptable_dot = cos(radians(angle)) + normal_tol
dot_products = np.dot(triangle_normals, direction) dot_products = np.dot(triangle_normals, direction)
filtered_face_indices = np.where(dot_products > normal_tol)[0] filtered_face_indices = np.where(dot_products > acceptable_dot)[0]
filtered_faces = faces[filtered_face_indices] filtered_faces = faces[filtered_face_indices]
return get_area_vf(vertices, filtered_faces) return get_area_vf(vertices, filtered_faces)