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main_grid_treaded.py
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main_grid_treaded.py
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# -*- coding: utf-8 -*-
##from multiprocessing import Process
##from multiprocessing import Pool
from visual import *
from math import *
from sys import platform
import time
#######################################
# #
# Author: Mads Ynddal #
# All Rights Reserved 2012 #
# #
#######################################
#######################################
#
# Settings - Start
#
#Window setup:
Width=800 #Width of window
Height=750 #Height of window
### Tekniske specifikationer
FPS=60
cpu_threads=2 #Windows kan kun håndtere 1 tråd
defi=1. #punkter pr. dm
grid_sizex=30
grid_sizey=1
grid_sizez=30
OP_ref_spacing=2
coil_1=1
coil_2=1
max_blen=20
hue_multiplier=2./6
strength_as_color=1
vector_pointers=1
debug_vectors3=0
debug_vectors3_multiplier=10**6
debug_offset=0
###
### Fysik og matematik
Vp=4*pi*10**-7
I=1
constant=Vp*I/(4*pi)
coiloffset=-15./2 #Distance from each coil divided by two
dm=15*8*2*pi #Definitionsmængden for funktionen (rundes op)
###
#
# Settings - End
#
#######################################
#######################################
#
# INITIALIZING - Start
#
scene = display(title='Helmholtz Coil',width=Width, height=Height,autoscale = False,scale=(0.03,0.03,0.03))
vectors_threaded=[]
coil1=curve(pos=[])
coil2=curve(pos=[])
vectors=[]
col=0
P=[]
if platform=="win32":
print "WARNING! Windows can't run multiple threads!\nForcing cpu_threads to 1"
cpu_threads=1
if cpu_threads>1:
from multiprocessing import Process
from multiprocessing import Pool
#
# INITIALIZING - End
#
#######################################
#######################################
# Optegner spoler ud fra funktionen
for tt in range(int(dm*defi)+1):
t=tt/defi
x=t*0.0005+15./2+debug_offset
y=31.5/2*sin(t)
z=31.5/2*cos(t)
if coil_1==1:
coil1.append((x,y,z))
else:
coil1.append((0,0,0))
x=t*0.0005-15./2-debug_offset
y=31.5/2*sin(t)
z=31.5/2*cos(t)
if coil_2:
coil2.append((x,y,z))
else:
coil2.append((0,0,0))
#
#######################################
#######################################
# Vektor regneregler
def vlen(a):
return sqrt(a[0]**2+a[1]**2+a[2]**2)
#Vector length
def vsub(a,b):
return [a[0]-b[0],a[1]-b[1],a[2]-b[2]]
#Substract vectors a,b
def vadd(a,b):
return [a[0]+b[0],a[1]+b[1],a[2]+b[2]]
#Add vectors a,b
def vdiv(a,b):
return [a[0]/float(b),a[1]/float(b),a[2]/float(b)]
#Divide vector by scalar b
def cprod(a,b):
return [a[1]*b[2]-a[2]*b[1],
a[2]*b[0]-a[0]*b[2],
a[0]*b[1]-a[1]*b[0]]
#Cross product
#
#######################################
#######################################
# Biot-Savarts lov
def dlxrr3(dl,r):
return vdiv(cprod(dl,r),vlen(r)**3)
def Apply_contant(Bsum1,Bsum2):
Bsum=vdiv(vadd(Bsum1,Bsum2),1/constant)
#Bsum=vdiv(vsub(Bsum1,Bsum2),1/constant)
Bsum1=vdiv(Bsum1,1/constant)
Bsum2=vdiv(Bsum2,1/constant)
return Bsum
def inte(OP):
global coiloffset,col
Bsum1=[0,0,0]
Bsum2=[0,0,0]
#Første spole
coiloffset*=-1
for tt in range(int(dm*defi)):
t=tt/float(defi)
s1,s2=s1s2(t)
dl=vsub(s2,s1)
m=vdiv(vadd(s1,s2),2)
r=vsub(OP,m)
Bsum1=vadd(Bsum1,dlxrr3(dl,r))
if not coil_1:
Bsum1=[0,0,0]
#Anden spole
coiloffset*=-1
for tt in range(int(dm*defi)):
t=tt/float(defi)
s1,s2=s1s2(t)
dl=vsub(s2,s1)
m=vdiv(vadd(s1,s2),2)
r=vsub(OP,m)
Bsum2=vadd(Bsum2,dlxrr3(dl,r))
if not coil_2:
Bsum2=[0,0,0]
return Bsum1,Bsum2
#
#######################################
#######################################
# Udregn funktionsværdi til tiden 't'
def s1s2(t1):
s1=[t1*0.0005+coiloffset,31.5/2*sin(t1),31.5/2*cos(t1)]
t2=t1+1/float(defi)
s2=[t2*0.0005+coiloffset,31.5/2*sin(t2),31.5/2*cos(t2)]
return s1,s2
#
#######################################
#######################################
# Udregn vektorstyrke og retning
def cal_vectors(xx,yy,zz):
global vectors_threaded
P=[xx*OP_ref_spacing-((grid_sizex-1)*OP_ref_spacing)/2,yy*OP_ref_spacing-((grid_sizey-1)*OP_ref_spacing)/2,zz*OP_ref_spacing-((grid_sizez-1)*OP_ref_spacing)/2]
n=xx+yy+zz
Bsum=vdiv(Apply_contant(*inte(P)),1./debug_vectors3_multiplier)
Blen=vlen(Bsum)
return (P,Bsum,Blen)
#
#######################################
#######################################
# Distribuerer opgaver til CPU-kerner
if cpu_threads>1:
pool = Pool(processes=cpu_threads)# start 4 worker processes
result=[]
P=[]
Bsum=[]
time_stamp=time.time()
for xx in range(grid_sizex):
for yy in range(grid_sizey):
for zz in range(grid_sizez):
if cpu_threads>1:
result.append(pool.apply_async(cal_vectors, [xx,yy,zz]))
else:
vectors_threaded.append(cal_vectors(xx,yy,zz))
### Indsamler svar fra CPU-kerner
if cpu_threads>1:
for n in range(grid_sizex*grid_sizey*grid_sizez):
vectors_threaded.append(result[n].get())
#
#######################################
#######################################
# Vektorfelt bliver rendereret
for n in range(len(vectors_threaded)):
P,Bsum,Blen=vectors_threaded[n]
if strength_as_color==1:
Blen=vlen(Bsum)
vcolor=color.hsv_to_rgb((1./4-(Blen*1./(max_blen/2)*hue_multiplier),1,1))
Bsum=vdiv(Bsum,Blen)
else:
vcolor=color.red
if Blen<max_blen:
curve(color=vcolor,pos=[(P[0],P[1],P[2]),(P[0]+Bsum[0],P[1]+Bsum[1],P[2]+Bsum[2])])
if vector_pointers==1:
sphere(pos=(P[0]+Bsum[0],P[1]+Bsum[1],P[2]+Bsum[2]), radius=0.1, color=color.white, opacity=1)
#
#######################################
print "Processing lasted: "+str(time.time()-time_stamp)[0:5],"sec\nUtilizing",cpu_threads,"processor threads, to animate:",grid_sizez*grid_sizey*grid_sizex,"vectors"
#######################################
# Indsætter partikel og
# indstiller kamera
center_point = sphere (pos=(0,0,0), radius=1, color=color.red, opacity=0.5)
particle = sphere (pos=(0,0,-12), radius=1, color=color.green, opacity=0.4)
speed = label()
i=0.
auto_rotate=1
while(1):
rate(FPS)
if auto_rotate==1:
i+=1
scene.forward=(-1*sin(i/FPS/5),-1,-1*cos(i/FPS/5))
#Particle
Bsum=vdiv(Apply_contant(*inte(particle.pos)),1./debug_vectors3_multiplier)
particle.pos.x+=Bsum[0]/30.
particle.pos.y+=Bsum[1]/30.
particle.pos.z+=Bsum[2]/30.
speed.pos=particle.pos
speed.pos.x+=4
speed.text=str(vlen(Bsum))[0:3]
#Particle
### Bruger input
if scene.kb.keys: # is there an event waiting to be processed?
c = scene.kb.getkey() # obtain keyboard information
if c=="r":
particle.pos=(20,0,-12)
if c=="t":
particle.pos=(0,0,-12)
if c=="y":
particle.pos=(5,0,-13)
if c=="u":
particle.pos=(14,0,-15)
if c=="w":
auto_rotate=0
scene.forward=(0,-1,0)
if c=="s":
auto_rotate=0
scene.forward=(-1,0,0)
if c=="a":
auto_rotate=0
scene.forward=(0,0,-1)
if c=="d":
if auto_rotate==0:
auto_rotate=1
else:
auto_rotate=0
#
#######################################