Python CGAL_Convex_hull_2.ch_n_point Exemples

Exemple #1

Fichier : tracking_layer.py Projet : Hui606/2D-Brillouin-zones-algorithm

def get_plotting_vtx(vertex_lst):
    leftmost, rightmost, top, bottom = Point_2(), Point_2(), Point_2(
    ), Point_2()
    CGAL_Convex_hull_2.ch_n_point(vertex_lst, top)  # maximal y coordinate.
    CGAL_Convex_hull_2.ch_e_point(vertex_lst,
                                  rightmost)  # maximal x coordinate.
    CGAL_Convex_hull_2.ch_s_point(vertex_lst, bottom)  # minimal y coordinates
    CGAL_Convex_hull_2.ch_w_point(vertex_lst, leftmost)  # minimal x coordinate

    lt, rt = leftmost.x(), rightmost.x()
    tp, btm = top.y(), bottom.y()

    draw_pt_list = []
    for pair in product([lt, rt], [tp, btm]):
        draw_pt_list.append(pair)

    # left_btm_x, left_btm_y= draw_pt_list[1]

    delta_x = (lt + rt) / 2 - 0
    delta_y = (tp + btm) / 2 - 0

    ch_height = tp - btm
    ch_width = rt - lt

    return ch_height, ch_width, delta_x, delta_y

Exemple #2

Fichier : cgal_examples.py Projet : nankezi1/asteroid_dumbbell

def convex_hull_2d():
    """Convex hull for two dimensions
    """
    points = []
    points.append(kernel.Point_2(0, 0))
    points.append(kernel.Point_2(1, 0))
    points.append(kernel.Point_2(0, 1))
    points.append(kernel.Point_2(1, 1,))
    points.append(kernel.Point_2(0.5, 0.5))
    points.append(kernel.Point_2(0.25, 0.25))

    result = []
    CGAL_Convex_hull_2.convex_hull_2(points, result)

    for p in result:
        print(p)
    
    points.append(kernel.Point_2(2, 2))
    n = kernel.Point_2()

    CGAL_Convex_hull_2.ch_n_point(points, n)
    print(n)

Exemple #3

from __future__ import print_function
from CGAL.CGAL_Kernel import Point_2
from CGAL import CGAL_Convex_hull_2

L = []
L.append(Point_2(0, 0))
L.append(Point_2(1, 0))
L.append(Point_2(0, 1))
L.append(Point_2(1, 1))
L.append(Point_2(0.5, 0.5))
L.append(Point_2(0.25, 0.25))

result = []
CGAL_Convex_hull_2.convex_hull_2(L, result)

for p in result:
    print(p)

L.append(Point_2(2, 2))
n = Point_2()

CGAL_Convex_hull_2.ch_n_point(L, n)
print(n)

Exemple #4

Fichier : test_convex_hull_2.py Projet : Deepaknkumar/cgal-swig-bindings

from __future__ import print_function
from CGAL.CGAL_Kernel import Point_2
from CGAL import CGAL_Convex_hull_2

L=[]
L.append( Point_2(0,0) )
L.append( Point_2(1,0) )
L.append( Point_2(0,1) )
L.append( Point_2(1,1) )
L.append( Point_2(0.5,0.5) )
L.append( Point_2(0.25,0.25) )

result = []
CGAL_Convex_hull_2.convex_hull_2(L, result)

for  p in  result:
  print(p)


L.append( Point_2(2,2) )
n=Point_2()

CGAL_Convex_hull_2.ch_n_point(L,n)
print(n)