254 lines
6.4 KiB
Python
254 lines
6.4 KiB
Python
"""
|
|
Polyhedron module
|
|
SPDX - License - Identifier: LGPL - 3.0 - or -later
|
|
Copyright © 2020 Project Author Guille Gutierrez guillermo.gutierrezmorote@concordia.ca
|
|
Contributors Pilar Monsalvete Alvarez de Uribarri pilar.monsalvete@concordia.ca
|
|
"""
|
|
|
|
from typing import List, Union
|
|
import sys
|
|
import math
|
|
import numpy as np
|
|
from trimesh import Trimesh
|
|
from helpers.configuration_helper import ConfigurationHelper
|
|
|
|
|
|
class Polyhedron:
|
|
"""
|
|
Polyhedron class
|
|
"""
|
|
|
|
def __init__(self, polygons):
|
|
self._polygons = polygons
|
|
self._polyhedron = None
|
|
self._triangulated_polyhedron = None
|
|
self._volume = None
|
|
self._faces = None
|
|
self._vertices = None
|
|
self._trimesh = None
|
|
self._centroid = None
|
|
self._max_z = None
|
|
self._max_y = None
|
|
self._max_x = None
|
|
self._min_z = None
|
|
self._min_y = None
|
|
self._min_x = None
|
|
|
|
def _position_of(self, point, face):
|
|
"""
|
|
position of a specific point in the list of points that define a face
|
|
:return: int
|
|
"""
|
|
vertices = self.vertices
|
|
for i in range(len(vertices)):
|
|
# ensure not duplicated vertex
|
|
power = 0
|
|
vertex2 = vertices[i]
|
|
for dimension in range(0, 3):
|
|
power += math.pow(vertex2[dimension] - point[dimension], 2)
|
|
distance = math.sqrt(power)
|
|
if i not in face and distance == 0:
|
|
return i
|
|
return -1
|
|
|
|
@property
|
|
def vertices(self) -> np.ndarray:
|
|
"""
|
|
Get polyhedron vertices
|
|
:return: np.ndarray(int)
|
|
"""
|
|
if self._vertices is None:
|
|
vertices, self._vertices = [], []
|
|
_ = [vertices.extend(s.coordinates) for s in self._polygons]
|
|
for vertex_1 in vertices:
|
|
found = False
|
|
for vertex_2 in self._vertices:
|
|
found = False
|
|
power = 0
|
|
for dimension in range(0, 3):
|
|
power += math.pow(vertex_2[dimension] - vertex_1[dimension], 2)
|
|
distance = math.sqrt(power)
|
|
if distance == 0:
|
|
found = True
|
|
break
|
|
if not found:
|
|
self._vertices.append(vertex_1)
|
|
self._vertices = np.asarray(self._vertices)
|
|
return self._vertices
|
|
|
|
@property
|
|
def faces(self) -> List[List[int]]:
|
|
"""
|
|
Get polyhedron triangular faces
|
|
:return: [face]
|
|
"""
|
|
if self._faces is None:
|
|
self._faces = []
|
|
|
|
for polygon in self._polygons:
|
|
|
|
face = []
|
|
points = polygon.coordinates
|
|
if len(points) != 3:
|
|
sub_polygons = polygon.triangulate()
|
|
# todo: I modified this! To be checked @Guille
|
|
if len(sub_polygons) >= 1:
|
|
for sub_polygon in sub_polygons:
|
|
face = []
|
|
points = sub_polygon.coordinates
|
|
for point in points:
|
|
face.append(self._position_of(point, face))
|
|
self._faces.append(face)
|
|
else:
|
|
for point in points:
|
|
face.append(self._position_of(point, face))
|
|
self._faces.append(face)
|
|
return self._faces
|
|
|
|
@property
|
|
def trimesh(self) -> Union[Trimesh, None]:
|
|
"""
|
|
Get polyhedron trimesh
|
|
:return: Trimesh
|
|
"""
|
|
if self._trimesh is None:
|
|
for face in self.faces:
|
|
if len(face) != 3:
|
|
sys.stderr.write('Not able to generate trimesh\n')
|
|
return None
|
|
self._trimesh = Trimesh(vertices=self.vertices, faces=self.faces)
|
|
return self._trimesh
|
|
|
|
@property
|
|
def volume(self):
|
|
"""
|
|
Get polyhedron volume in cubic meters
|
|
:return: float
|
|
"""
|
|
if self._volume is None:
|
|
if self.trimesh is None:
|
|
self._volume = np.inf
|
|
elif not self.trimesh.is_volume:
|
|
self._volume = np.inf
|
|
else:
|
|
self._volume = self.trimesh.volume
|
|
return self._volume
|
|
|
|
@property
|
|
def max_z(self):
|
|
"""
|
|
Get polyhedron maximal z value in meters
|
|
:return: float
|
|
"""
|
|
if self._max_z is None:
|
|
self._max_z = ConfigurationHelper().min_coordinate
|
|
for polygon in self._polygons:
|
|
for point in polygon.coordinates:
|
|
self._max_z = max(self._max_z, point[2])
|
|
return self._max_z
|
|
|
|
@property
|
|
def max_y(self):
|
|
"""
|
|
Get polyhedron maximal y value in meters
|
|
:return: float
|
|
"""
|
|
if self._max_y is None:
|
|
self._max_y = ConfigurationHelper().min_coordinate
|
|
for polygon in self._polygons:
|
|
for point in polygon.coordinates:
|
|
if self._max_y < point[1]:
|
|
self._max_y = point[1]
|
|
return self._max_y
|
|
|
|
@property
|
|
def max_x(self):
|
|
"""
|
|
Get polyhedron maximal x value in meters
|
|
:return: float
|
|
"""
|
|
if self._max_x is None:
|
|
self._max_x = ConfigurationHelper().min_coordinate
|
|
for polygon in self._polygons:
|
|
for point in polygon.coordinates:
|
|
self._max_x = max(self._max_x, point[0])
|
|
return self._max_x
|
|
|
|
@property
|
|
def min_z(self):
|
|
"""
|
|
Get polyhedron minimal z value in meters
|
|
:return: float
|
|
"""
|
|
if self._min_z is None:
|
|
self._min_z = self.max_z
|
|
for polygon in self._polygons:
|
|
for point in polygon.coordinates:
|
|
if self._min_z > point[2]:
|
|
self._min_z = point[2]
|
|
return self._min_z
|
|
|
|
@property
|
|
def min_y(self):
|
|
"""
|
|
Get polyhedron minimal y value in meters
|
|
:return: float
|
|
"""
|
|
if self._min_y is None:
|
|
self._min_y = self.max_y
|
|
for polygon in self._polygons:
|
|
for point in polygon.coordinates:
|
|
if self._min_y > point[1]:
|
|
self._min_y = point[1]
|
|
return self._min_y
|
|
|
|
@property
|
|
def min_x(self):
|
|
"""
|
|
Get polyhedron minimal x value in meters
|
|
:return: float
|
|
"""
|
|
if self._min_x is None:
|
|
self._min_x = self.max_x
|
|
for polygon in self._polygons:
|
|
for point in polygon.coordinates:
|
|
if self._min_x > point[0]:
|
|
self._min_x = point[0]
|
|
return self._min_x
|
|
|
|
@property
|
|
def centroid(self) -> [float]:
|
|
"""
|
|
Get polyhedron centroid
|
|
:return: [x,y,z]
|
|
"""
|
|
if self._centroid is None:
|
|
trimesh = self.trimesh
|
|
if trimesh is None:
|
|
return None
|
|
self._centroid = self.trimesh.centroid
|
|
return self._centroid
|
|
|
|
def stl_export(self, full_path):
|
|
"""
|
|
Export the polyhedron to stl given file
|
|
:param full_path: str
|
|
:return: None
|
|
"""
|
|
self.trimesh.export(full_path, 'stl_ascii')
|
|
|
|
def obj_export(self, full_path):
|
|
"""
|
|
Export the polyhedron to obj given file
|
|
:param full_path: str
|
|
:return: None
|
|
"""
|
|
self.trimesh.export(full_path, 'obj')
|
|
|
|
def show(self):
|
|
"""
|
|
Auxiliary function to render the polyhedron
|
|
:return: None
|
|
"""
|
|
self.trimesh.show()
|