forked from inconvergent/differential-mesh
/
main_ani_new.py
executable file
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/
main_ani_new.py
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#!/usr/bin/python3
# -*- coding: utf-8 -*-
from numpy import pi
from numpy import sqrt
from numpy import zeros
from numpy import cos
from numpy import sin
from numpy.random import random
MID = 0.5
NMAX = 10e6
SIZE = 800
ONE = 1./SIZE
RAD = 2*ONE
H = sqrt(3.)*RAD
NEARL = 2*RAD
FARL = RAD*15
OPT_STP = 1./SIZE
ATTRACT_STP = OPT_STP*0.1
REJECT_STP = OPT_STP*0.1
TRIANGLE_STP = OPT_STP*0.01
ALPHA = 0.9
DIMINISH = 0.99
SPLIT_LIMIT = H*2
FLIP_LIMIT = NEARL*0.5
MINIMUM_LENGTH = H*0.8
MAXIMUM_LENGTH = H*2
LINEWIDTH = ONE*1.5
BACK = [1,1,1,1]
FRONT = [0,0,0,0.3]
TWOPI = pi*2.
PROCS = 2
np_coord = zeros((NMAX,6), 'float')
np_gen = zeros(NMAX, 'int')
i = 0
steps_runs = 0
def show(render, dm):
from modules.colors import cyan
global np_coord
global np_gen
global i
render.clear_canvas()
num = dm.np_get_triangles_coordinates(np_coord)
render_triangle = render.triangle
render_circle = render.circle
for f,vv in enumerate(np_coord[:num,:]):
render.set_front(FRONT)
render_triangle(*vv,fill=False)
rad = ONE*3
render.set_front(cyan)
render_circle(vv[0], vv[1], rad, fill=True)
render_circle(vv[2], vv[3], rad, fill=True)
render_circle(vv[4], vv[5], rad, fill=True)
#render.write_to_png('ani_{:05d}.png'.format(i))
i += 1
def steps(dm):
from time import time
from modules.helpers import print_stats
from numpy import array
global steps_runs
steps_runs += 1
t1 = time()
dm.optimize_position(
ATTRACT_STP,
REJECT_STP,
TRIANGLE_STP,
ALPHA,
DIMINISH,
-1
)
henum = dm.get_henum()
surface_edges = array(
[dm.is_surface_edge(i)>0 \
for i in range(henum)],
'bool').nonzero()[0]
rnd = random(len(surface_edges)*2)
the = (1.-2*rnd[::2])*pi
rad = rnd[1::2]*0.5*H
num_new = dm.new_triangles_from_surface_edges(
surface_edges,
len(surface_edges),
H,
cos(the)*rad,
sin(the)*rad,
MINIMUM_LENGTH,
MAXIMUM_LENGTH,
1
)
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
def main():
import gtk
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.get_colors_from_file('../colors/red_earth.gif')
render.set_line_width(LINEWIDTH)
gtk.main()
if __name__ == '__main__' :
main()