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main_island_ani.py
executable file
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main_island_ani.py
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#!/usr/bin/python3
# -*- coding: utf-8 -*-
from numpy import pi
from numpy import sqrt
from numpy import zeros
NMAX = 10e6
SIZE = 520
ONE = 1./SIZE
RAD = 1.5*ONE
H = sqrt(3.)*RAD
NEARL = 2*RAD
FARL = RAD*15
STP = 1./SIZE*0.5
ATTRACT_STP = STP*0.1
REJECT_STP = STP*0.1
TRIANGLE_STP = STP*0.01
ALPHA = 0
DIMINISH = 0.99
SPLIT_LIMIT = H*2
FLIP_LIMIT = NEARL*0.5
MAXIMUM_LENGTH = H*2
MINIMUM_LENGTH = H*0.8
MID = 0.5
LINEWIDTH = ONE*1.5
BACK = [1,1,1,1]
FRONT = [0,0,0,0.3]
STEPS_ITT = 1
TWOPI = pi*2.
np_coord = zeros((NMAX,6), 'float')
np_gen = zeros(NMAX, 'int')
i = 0
steps_runs = 0
PROCS = 2
def show(render, dm):
global np_coord
global np_gen
global i
render.clear_canvas()
num = dm.np_get_triangles_coordinates(np_coord)
render_random_triangle = render.random_triangle
for f,vv in enumerate(np_coord[:num,:]):
render.set_front(FRONT)
render_random_triangle(*vv,grains=45)
# render.write_to_png('ani_{:05d}.png'.format(i))
i += 1
def steps(dm):
from numpy import cos
from numpy import sin
from numpy import unique
from numpy.random import randint, random
from time import time
from modules.helpers import print_stats
global steps_runs
steps_runs += 1
t1 = time()
for i in range(STEPS_ITT):
dm.optimize_position(
ATTRACT_STP,
REJECT_STP,
TRIANGLE_STP,
ALPHA,
DIMINISH,
-1
)
henum = dm.get_henum()
edges = unique(randint(henum,size=(henum)))
en = len(edges)
rnd = 1-2*random(en*2)
make_island = random(size=en)>0.85
for i,(he,isl) in enumerate(zip(edges,make_island)):
if dm.is_surface_edge(he)>0:
the = pi*rnd[2*i]
rad = rnd[2*i+1]*0.5
dx = cos(the)
dy = sin(the)
if not isl:
dm.new_triangle_from_surface_edge(
he,
H,
dx*rad*H,
dy*rad*H,
minimum_length=MINIMUM_LENGTH,
maximum_length=MAXIMUM_LENGTH,
merge_ragged_edge=1
)
else:
dm.throw_seed_triangle(
he,
H,
dx*rad*H,
dy*rad*H,
NEARL*0.5,
the
)
dm.optimize_edges(
SPLIT_LIMIT,
FLIP_LIMIT
)
if dm.safe_vertex_positions(3*H)<0:
print('vertices reached the boundary. stopping.')
return False
t2 = time()
print_stats(steps_runs, t2-t1, dm)
return True
i = 0
def main():
from differentialMesh import DifferentialMesh
from iutils.render import Animate
DM = DifferentialMesh(NMAX, 2*FARL, NEARL, FARL, PROCS)
DM.new_faces_in_ngon(MID,MID, H, 6, 0.0)
def wrap(render):
res = steps(DM)
show(render, DM)
return res
render = Animate(SIZE, BACK, FRONT, wrap)
render.set_line_width(LINEWIDTH)
render.start()
if __name__ == '__main__' :
main()