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fire.py
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import numpy as np
import pylab as plt
n = 50
veg = np.zeros((n+2,n+2))
age = np.zeros((n+2,n+2))
age = age - 1
T = 300
GRS = 1
JP = 2
AP = 3
JH = 4
AH = 5
light_prob=0.02
fire_prob= [0.4,0.1,0.1,0.05,0.05]
sur_prob= [1,0.3,0.8,0.1,0.2]
for i in range(1,n+1):
for j in range(1,n+1):
veg[i][j] = np.random.randint(1,6)
if veg[i][j] == JP or veg[i][j] == JH:
age[i][j] = np.random.randint(0,10)
im_veg = None
im_age = None
for _ in range(T):
if not im_veg:
plt.figure(1)
im_veg = plt.imshow(veg[1:n+1,1:n+1], cmap = 'gist_earth', interpolation='none',vmin=1,vmax=5)
plt.colorbar(im_veg, orientation='horizontal')
plt.figure(2)
im_age = plt.imshow(age[1:n+1,1:n+1], cmap = 'gist_earth', interpolation='none',vmin=0,vmax=10)
plt.colorbar(im_age, orientation='horizontal')
else:
temp = np.array(veg)
temp_age = np.array(age)
for i in range(1,n+1):
for j in range(1,n+1):
flag = False
if temp[i][j] == GRS: #if Grass
for l in range(1,5): #Grass to Juvenile pine
for mm in range(i-l,i+l+1):
for nn in range(j-l,j+l+1):
if mm>=0 and mm<n+2 and nn>=0 and nn<n+2 and mm!=nn:
if temp[mm][nn] == JP:
flag = True
break
if flag:
break
if flag:
break
if flag:
p = np.random.ranf(1)
if p < 0.03:
veg[i][j] = 2
age[i][j] = 1
flag = False
for mm in range(i-1,i+1+1): #Grass to Juvenile Hardwood
for nn in range(j-1,j+1+1):
if mm>=0 and mm<n+2 and nn>=0 and nn<n+2 and mm != nn:
if temp[mm][nn] == 5:
if np.random.ranf(1) <= 0.01:
veg[i][j] = 4
age[i][j] = 1
flag = True
break
if flag:
break
flag = False
if temp[i][j] == JP or temp[i][j] == AP: #Pine to Juvenile Hardwood
for mm in range(i-1,i+1+1):
for nn in range(j-1,j+1+1):
if mm>=0 and mm<n+2 and nn>=0 and nn<n+2 and mm != nn:
if temp[mm][nn] == AH:
if np.random.ranf(1) <= 0.02:
veg[i][j] = JH
age[i][j] = 1
flag = True
break
if flag:
break
#veg = temp
#age = temp_age
for i in range(1,n+1): #Update age
for j in range(1,n+1):
if veg[i][j] == 2 or veg[i][j] == 4:
veg[i][j] = veg[i][j] + int(age[i][j]+1)/10
age[i][j] = int(age[i][j] + 1)%10
"""for i in range(1,n+1): #Fire
for j in range(1,n+1):
if np.random.ranf(1) <= light_prob:
for kk in range(1,6):
if veg[i][j]==kk:
if np.random.ranf(1) <= fire_prob[kk]:
if np.random.ranf(1) <= sur_prob[kk]:
veg[i][j]=1
age[i][j]=0"""
lightning = np.zeros((n+2,n+2))
state = np.zeros((n+2,n+2))
for i in range(1,n+1):
for j in range(1,n+1):
f = np.random.ranf()
if f<=light_prob:
lightning[i][j] = 1
state[i][j] = 1
R = 4
t = 10
im_fire = None
"""for _ in range(t):
if not im_fire:
plt.figure(3)
im_fire = plt.imshow(veg[1:n+1,1:n+1], cmap = 'gist_earth', interpolation='none',vmin=1,vmax=5)
plt.colorbar(im_veg, orientation='horizontal')
else:
temp = np.array(state)
for i in range(1,n+1):
for j in range(1,n+1):
x = 0
for mm in range(1,n+1): #count burning neighbours
for nn in range(1,n+1):
if mm != nn:
x = x+temp[mm][nn]
if temp[i][j] == 0 and veg[i][j] == JP and veg[i][j] == JH and x >= R:
state[i][j] = 1
elif temp[i][j] == 0 and x>=1:
state[i][j] = 1
elif state[i][j]==1:
state[i][j] = 0
veg[i][j] = GRS
flag = True
for i in range(1,n+1):
for j in range(1,n+1):
if temp[i][j]!= state[i][j]:
flag=False
if not flag:
break
if flag:
break
im_fire.set_data(veg[1:n+1,1:n+1])
plt.draw()
plt.pause(0.05) """
im_veg.set_data(veg[1:n+1,1:n+1])
im_age.set_data(age[1:n+1,1:n+1])
plt.draw()
plt.pause(0.05)
count = 0
for i in range(1,n+1):
for j in range(1,n+1):
if veg[i][j] == 3:
count = count + 1
#print (count)